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iQ-Analyzer 6 user manual

1. iQ ANALYZER User Manual 26 August 2014 Image Engineering GmbH amp Co KG AugustinusstraBe 9d 50226 Frechen Germany T 49 2234 995595 0 F 49 2234 995595 10 www image engineering de CONTENT 1 INTRODUCTION 2 INNOVATIONS OF THE IQ ANALYZER VERSION 6 2 1 NEW FEATURES 2 2 NEW ALGORITHMS 3 INSTALLING IQ ANALYZER 3 1 SYSTEM REQUIREMENTS 3 2 SOFTWARE PROTECTION 3 3 INSTALLATION 3 4 ANTIVIRUS ISSUES 3 5 SOFTWARE BY THIRD PARTIES 3 6 NETWORK SITE LICENSE FOR W 3 6 1 Overview 6 2 Installation 3 6 3 Matrix Net 3 6 4 iQ Analyzer 4 COMMAND LINE INTERFACE 4 1 DOARWNNNN ooo a ImageFile 2 SettingFile 3 Module 4 Options 5 GRAPHICAL USER INTERFACE 5 1 HOME SCREEN 5 1 1 Main functions 5 1 2 User workflow 5 1 8 Administrator worklflow 5 2 STANDARD MODE MODULES 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS 6 RAW 6 1 1 RAW Processing 6 1 2 RAW Info 6 1 8 Batch Processing 6 2 META 6 2 1 Device 6 22 Image Properties 6 23 Setup 6 24 Notes 6 3 REQUIREMENTS 6 3 1 OECF 6 8 2 Color 6 3 3 Resolution 6 8 4 Shading 6 4 2 Export Graphics 6 5 GENERAL SETTING 6 5 1 Oulput 6 5 2 Filepaths amp Filehandling iQ Analyzer 6 5 8 General 6 5 4 Settings amp StartUp 6 5 5 Updates 6 5 6 Internal Calculations 6 5 7 6 5 8 7 ANAL
2. save and load settings Weights to calculate Y You can specify weights for R G and B to calculate the luminance Y Weights of usual standards are ITU R BT 709 recommended Y 0 2126 R 0 7152 G 0 0722 B ISO 12232 Y 0 2125 R 0 7154 G 0 0721 B NTSC Y 0 2989 R 0 5870 G 0 1140 B iQ Analyzer 43 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Q 6 5 7 Home Manage Home Using this button a preferences menu opens where you can manage layouts and settings that are available in the iQ Analyzer Home These modifications do not delete or change the data files stored in the default They just affect the visibility of chart layouts and settings in the Home screen save and load settings Step 1 Choose module First make selection of the module you want to make modifications for Step 2 Choose chart At the right side all charts are listed which are already inserted in this module and displayed in the Home screen On the left there is a drop down menu which contains all chart layout files which are stored in the certain folder To add a further chart layout to the list select the chart out of the dropdown menu The layout display name could be edited to you purposes optional That does not change the file name Choose an icon for this layout optional Step 3 Create Settings The next step is assigning the setting you already created to this chart layout Select the setting out of the drop dow
3. X Pos Y Y Pos Y X Pos R Y Pos R X Pos G Y Pos G X Pos B Y Pos B 1 2 il 1 1 2 1 E 1 5 1 2 1 Um 1 5 1 17 1 3 1 22 1 6 1 22 1 5 i 26 1 9 iQ Analyzer 140 9 MODULES MEASUREMENT Q 9 8 MEASUREMENT The measurement module offers a bundle of measurement utilities It is a handy modul for fast checks and as well for regular measurements This module is not built for a specific chart layout You can add every image file to the filelist or pass a video stream to this module Choose the utility corresponding to your need IQ ANALYZER 9 8 1 Settings amp Meta data Starting with the measurement module does not require any settings Add files to the list in the left column as in all other module Below the file list the meta data of the selected file is displayed 9 8 2 Navigator amp Control Panel Image view The image view shows the active file Either the whole image or a part of it according to ROI adjustments in the navigator iQ Analyzer 41 9 MODULES MEASUREMENT Q Navigator Below the image view the navigator is located The navigator shows always the whole active image marked in the file list The image is framed by a rectangle which size and position can be adjusted to enlarge a specific area of the image Place the mouse over a corner mark of the rectangel It will appear as arrow Now click and draw until required size is reached The enlarged part is shown in the image area above
4. an image namend Centerlmage is saved which shows the center s of the Siemens star s You can define the size of the center image relatively to Nyquist E g 0 5 equals an image which shows the star from its center to 50 Nyquist Center Image Size 0 5 Center Image Size 1 iQ Analyzer 102 9 MODULES RESOLUTION Q ADVANCED SETTINGS SFR EDGE Reduce Shading In case of strong shading you have the opportunity to use a shading correction based on the shading measurement zx Using this method produces better results Make a shading calculation one or more images in the Shading module and export the results as iea file by using the Export Import Export lmport menu save shading menu results Import the saved shading data and resolution is calculated with shading correction Select shading data After starting the Analysis a window appears that shows the files of the resolution file list with information about fstop k and focal length f Use the dropdown selection on the right of each file to match the resolution file with its corresponding shading file and press Proceed SubCharts Select the subcharts edges you would like to analyze If All is enabled all subcharts are listed and analyzed For numbering of the subcharts see chapter 10 CHARTS USED FOR iQ ANALYZER OversamplingFactor Degree of oversampling the slanted edge default 4 Max Frequency The highest
5. standard Color Noise Difference The color noise difference coefficients C1 and C2 for the calculation of the total noise Ototai are changed Grout 4 0y CIO y Crp automatically ISO 15739 2003 C1 0 64 C2 0 16 ISO 15739 2013 C1 0 279 C2 0 088 Scanner equal to ISO 15739 V1 Threshold DR The Dynamic Range DR is the calculated distance between the illumination needed to reach saturation and the minimum saturation limited by a specified SNR signal to noise ratio The standard use for ISO 15739 is SNR 1 This may lead to problems due to signal processing and noise reduction as a SNR of 1 is never reached The threshold might be increased Note We have god experience using a threshold of 3 You should mention the threshold when reporting the dynamic range Warn of no Field in Saturation If the checkbox is enabled a warning appears if no field is in ae saturation According to ISO 15739 2003 exposure is adjusted to the saturated field this checkbox is automatically enabled when 1SO15739 2003 is choosen Saturation is Variance lt Saturation means variance 0 If there is fixed pattern noise the variance is greater than 0 but the image is saturated anyhow You can set a tolerance value up to this saturation in one field can vary and is noted as saturated Check Background In the ISO 15739 2013 the exposure is adjusted to the background with a digital value DV of 119 range between 10
6. iQ Analyzer 178 10 CHARTS USED FOR iQ ANALYZER 10 11 TE240 ISO 21550 Scanner Dynamic Range Chart The TE240 is designed to check the 35 mm scanner dynamic range It has 24 graypatches with a density range of 4 0 or 6 0 The reflective version consists of a 2 4 density range OECF OECF OECF 22 19 7 OECF OECF 20 4 Numbering of the patches OECF OECF 5 2 OECF OECF OECF 6 3 1 10 12 TE241 OECF Noise Chart with 20 gray patches ISO 14524 ISO 15739 The TE241 is designed to measure the characteristic curve of digital cameras It is an extended OECF chart and has 20 patches and a contrast range of 10 000 1 100 000 1 1 000 000 1 and as X Version Numbering of the patches iQ Analyzer 174 10 CHARTS USED FOR iQ ANALYZER Q 10 13 TE251 Distortion and Chromatic Aberration Crosses The TE251 is designed to measure the distortion of digital cameras It contains black crosses on a white background The TE253 9x is designed for checking resolution The chart contains slanted edges and white noise patches TE253 single star chart contains one radially sine modulated Siemens stars gray patches and black squares with a small white square in it Star 4 Star 3 Star 2 fy Hu Rm The TE253 9x contains three main structures Star 5 il Star 0 4 Star1 Segoe Tn Gee Sa Bee Star 6 Star7 Star 8 iQ Analyzer 175 10 CHARTS USED FOR iQ ANALYZER 1 Harmonic Siemens sta
7. iQ Analyzer 153 9 MODULES UTT Q Beside the automatic mode for ROI region of interest detection a manual mode can be chosen If the manual mode is selected there are two alternatives Crop Image Select the chart further detections are done automatically Crop Image amp Adjust Patches Select the chart and adjust the patches Writing Meta Data to File The results are written into the IPTC tag Using the button a popup window The IE Analyzer uses the software exiftool by Phil Harvey to write appears and you are linked to the results to he IPTC Mela Data in the fle FC Put etftoal exe irto the folder ibn the IE Analyze tolder Mac Make sure that eriftool is installed as directed an the exftaol homepage website with the Exif tool of Phil Harvey Using MAC OS X you need to install thi Exif tool If you are using Windows the gt button and popup window with information about the required Exif tool exiftool exe is installed already Write IPTC Tag Enable the checkbox if IPTC tags shall be written Keep Original File f the checkbox is enabled the Exif tool first makes a a copy of the original file filename tif_original and modifies the original file If you want to use the original file you have to delete the part original from the filename If the checkbox is not enabled the original file is modified during the analyzing process Recommended is to enable the checkbox Notes T
8. of Nyquist The Centerlmage named with the extension filename center jpg is saved automatically Path for saving and image size quality type can be defined in the settings LumBoost This view is available in the shading module During the analysing process the image is converted to the LCH colorspace luminace saturation hue The luminace distribution is shown depending on your defined boost advanced menu default 1x C 0 The LumBoost named with the extension filename_lumboost jpg is saved automatically Path for saving and image quality type can be defined in the settings original image sahding module LumBoost image shading module SatBoost image shading module SatBoost In the shading module this representation shows the saturation distribution depending on the defined boost advanced menu default 1x L 50 iQ Analyzer 51 7 ANALYZING PROCESS AND RESULTS Q The SatBoost named with the extension filename satboostjog is saved automatically Path for saving and image quality type can be defined in the settings Note The UTT module offers some other graphical representations They are described in chapter IX UTT The right dropdown menu beyond the mage View contains the particular image files file path is shown if Files ind Queue Ext is selected in the output processing below the file list on the left side The average output data is also listed here if choosen Average or Av
9. the left and the right edges EdgesLeft mean edges left 100 edges left 80 edges left 60 edges left 40 EdgesRight mean edges right 100 edges right 80 edges right 60 edges right 40 Edge SFR Mean Sub LP Pix The modulation of these two averages are shown In the table you find the limiting resolutions of mean edges left and right the limiting value can be set in the Advanced Settings for SFR Siemens iQ Analyzer 110 9 MODULES RESOLUTION Q Edge Profile All The illustration represents the edge profile intensity of all edges with different modulations e g eight edges in TE253 NoiseLab In the table you find the edge width Edge Profile All Edge Profile Mean Sub Edge Profile Mean Sub The illustration represents the edge profile intensity of the average of all edges in one subchart e g the average of the left edges and the average of the right edges in TE253 NoiseLab Edge Profile Mean Edge This is a more compact illustration of the edge profile iQ Analyzer calculates the average of all edges with the same name over subchart E g for TE253 NoiseLab iQ Analyzer calculates each the average of the left and the right edges with same modulation Mod100 mean edges left 100 edges right 100 Mod80 mean edges left 80 edges right 80 Mod60 mean edges left 60 edges right 60 Mod40 mean edges left 40 edges right 40 Edge Profile Mean Edge The edge profile intensit
10. If you do not insert a value for illumination a popup window will appear when you press the Start button ox ema ZEE popup appears if you do not have set illumination iQ Analyzer 146 X MODULES 42 Q 9 9 2 Graphical presentation IMAGE VIEW ROI with marked patches Original Check Image Centerlmage RESULT VIEW By pressing the Result button the graphical and numerical results are displayed in the right screen lor Resolution Shading depending on the the diplayed result selected with the first dropdown menu the further menus offer different views Below the graphical results some dropdown menus exist The first one allows choosing the result you want to be displayed OECF Color Resolution Shading The furtherdropdown menus allow different views depending on the result you choose in the first menu e g Delta E Delta L Delta C Delta H for color analysis iQ Analyzer 147 X MODULES 42 Q OECF For details please see the chapter OECF OECF Visual Noise Noise Color For details please see the chapter Color Numerical Results Visual Comparison 3D Bars GES iQ Analyzer 148 X MODULES 42 CIE L a b Resolution For details please see the chapter Resolution Overview Stars Segments Groups Noise Histogram Noise Spectrum iQ Analyzer 149 X MODULES 42 Shading For details please see the chap
11. Mean Sub The illustration represents the edge profile intensity of the average of all edges in one subchart e g the average of the left edges and the average of the right edges in TE253 NoiseLab Edge Profile Mean Edge This is a more compact illustration of the edge profile iQ Analyzer calculates the average of all edges with the same name over subchart E g for TE253 NoiseLab iQ Analyzer calculates each the average of the left and the right edges with same modulation Mod100 mean edges left 100 edges right 100 Mod80 mean edges left 80 edges right 80 Mod60 mean edges left 60 edges right 60 Mod40 mean edges left 40 edges right 40 The edge profile intensities of these four averages are shown In the table you find the edge width Noise Spectrum This plot shows the MTF of the different noise patches In the table you find the limiting resolution of each noise patch the limiting value can be set in the Advanced Settings for SFR Siemens Noise Histogram The histogram of noise hold different information about the noise characteristics But the histogram would change for different mean values of the noisy image signal so the first derivative is used The target is a gaussian white noise so all digital values appear in the image with a probability defined by the gaussian distribution around the mean value In the processed image the mean value becomes zero as the first derivative of a flat image is
12. Mode and press Start ll Adjust the size and the position and add one ROI The ROI appears in the image adjustment of ROI position and inserted ROI iQ Analyzer 70 9 MODULES SETTINGS Q lll Press Export A menu apears where you can adjust the file name an add a comment both optional Save this file As default it will be stored at the same folder as the image file zer Testi03 Resolutionitesto 1 txt ponen ROI export successfull ROITE253 Filename Y Desklop Analyzer TesiN03 FlesolitiorhtestOT nt February 2014 Gee IV Press Proceed to start the analysis Fix Mode TE000_FreeEdgeChart chart only Choosing Fix Mode from the list requires to load a ROI file text file which was created once before using the Manual Mode Click at the button and select the appropriate text file When starting the anlysis the iQ Analyzer will calculate the results for the ROls defined in this text file Files Files for analysis have to be added to the file list using the button Delete selected files with the button and clear the list with the C button The file list displays icons before each file path which show the status of each file The gray dash informas you that the file is not processed yet A green check marks a file which analysis is completed A red cross shows that analysis fails Information due to this are shown in a popup window A
13. ROls are saved automatically as text and JPEG files depending on your export settings made in the General Settings 9 1 2 Advanced Settings Pressing the Advanced toggle buttton at the bottom of the settings opens the advanced settings menu Pressing this button again hides the advanced settings menu The description of the specific settings for each module is included in the description of the modules see next chapters iQ Analyzer 72 9 MODULES OECF Q 9 2 OECF With the aid of arranged gray scales the opto electronic conversion function OECF can be determined This phrase describes the characteristic property of digital cameras to transfer luminance into digital values in the picture The curve is specified for all three color channels red green and blue in color images OECF tab The chart has to be illuminated homogeneously Regarding exposure there are two recommendations for the old and the actual version of ISO standard 15739 For the outdated version ISO V1 we recommend to choose an exposure on the camera that way that the brightest patch is in full saturation and the next is not That way you can get comparable results between different cameras In the actual version of ISO 15739 ISO V2 the digital value of the background has to be 118 9 2 1 Settings SETTINGS After selecting the chart layout the OECF module needs the following adjustment Luminance Data As the OECF is a function of digi
14. The thin black line represents the luminance reference values L defined in the specifications the blue line represents the luminance results L of the analyzed UTT chart The tolerance range that is also defined in the specifications is displayed in green Values that are outside the tolerance range are outlined in red Value Violation Numeric results are diplayed for the average and the maximum of AL luminance difference and AE color difference iQ Analyzer 159 9 MODULES UTT Q The dropdown menu down right of the graph enables an enlarged view of parts of the graph Highlights and Shadows Tonal Reproduction Highlights Tonal Reproduction Shadows White Balance The graph diplays the adjustment to keep the gray scale neutral Outlined are the luminance L vs the color difference AC of the gray scales At best AC is 0 no color cast The tolerance range that is defined in the specifications is displayed in green Values that are outside the tolerance range are outlined in red Value Violation iQ Analyzer 160 9 MODULES UTT Q Gain Modulation Gain modulation describes the reproduction of the sample in digital values It is a comparison between the steps of the sample and the resulting digital values At a reproduction of 1 1 e g 4 AL between two patches in the sample correspond to 4 AL in the digital scanned image the result is 100 The thin black line represents the
15. To shift a rectangel place the mouse in the middle of the rectange The mouse will appear as 4 direction arrow Click and draw the rectangle to the required position Tools Next the the navigator image the tools are listed Choose between the line rectangle or circle figure to insert it to the image Clicking a second time and the tool will disappear The tools could be adjusted by click and draw at the corner marks enlarge or shrink Holding the shift key while resizing maintains the aspect ratio You can also increase or decrease the tool size when scrolling the wheel of your mouse up and down The aspect ratio is kept by using the mouse wheel Click and draw somewhere at the middle of the tool to shift it among the image ow The button inserts a grid that overlays the image Each lines can be adjusted by click at it and drawing it Click at the button again and the grid will disappear Show full image Clicking at the show full image button sets the ROI in the navigator to the whole image Utilities The utilities deliver different results which could be observed in real time at diagram areas Two utilities can be activated at the same time Choose a utility of each dropdown menu and select the value you want to be displayed from the second dropdown menu The diagram area above shows the graphical presentation of the currently marked region If no ROI is inserted the diagram area stay emty i
16. added on request For a detailed describtion of the charts please see chapter 10 CHARTS USED FOR iQ ANALYZER Forty Two Wee Multi purpose chart for high speed camera testing TE255 Diffusor plate to measure vignetting iQ Analyzer 126 9 MODULES DISTORTION Q 9 6 DISTORTION The distortion module enables you to evaluate the distortion and the lateral chromatic aberration in one step Therefore iQ Analyzer uses a test patterns crosses or points which are distributetd over the complete image The center of the crosses points are located with sub pixel precision for RGB The distortion and the chromatic aberration can be calculated from these locations 9 Distortion X Distortion tab There are some requirements for the image as they could affect the results e make sure that the camera is not tilted in any direction e the center cross in the chart surrounded by markers has to be the center cross in the image as well e arrange the camera in such a way that the image shows the full chart height The image aspect ratio specifies how many crosses you cover in width e the image must show only complete crosses e the chart should be illuminated homogeneously TE251 the test chart for calculation of distortion and the chromatic aberration LGD Lens Geometric Distortion the four quadrants Q1 Q2 Q3 Q4 iQ Analyzer 127 9 MODULES DISTORTION Q Undistorted Grid Barrel Dist
17. checking the color rendition of TV cameras T169 EBU CAM Test Chart EBU Tech 3237 iQ Analyzer 96 9 MODULES COLOR TE188 TE226 TE230 TE258 TE262 Color Rendition Chart X Rite ColorChecker 18 color patches 6 step gray scale HDTV Color Rendition Test Chart Chart to measure the color rendition of an HDTV camera X Rite ColorChecker SG 140 patches IT8 Scanner Characterization Chart UTT Universal Test Target iQ Analyzer 97 9 MODULES RESOLUTION Q 9 4 RESOLUTION The resolution module enables you to measure the resolution of a digital camera system Depending on the used test chart you get the SFR spatial frequency response of siemens stars of edges and information about reproduction of low contrast fine details using patches showing noise Resolution tab The charts have to be illuminated homogeneously the camera should be filxed on a tripod to minimize motion blur Be aware that a lot of different settings in the camera influenece the resolution e g compression sharpness enhancement iso speed Set them carefully 9 4 1 Settings Before starting analysis of the resolution charts you have to define some settings SETTINGS Analyse Depending on the choosen chart layout you can select the structure s which shall be part of the calculation SFR Siemens spatial frequency response of the Siemens star s The aim is to get a system MTF SFR Edge spatial
18. difference AL luminance AC saturation AH hue color bar for visualization of color differences from dark green AE 0 to dark red AE maximum value defined in the specification T ii WR Resolution Resolution is measured on the nine resolution patches slanted edges TL top left TC top center TR top right CL center left CC center center CR center right BL bottom left BC bottom center BR bottom right The thin black horizontal lines illustrates the specification limits The bars are colored green or red depending on wether the results are within green or outside red the tolerance Max Modulation The maximum Modulation is 1 for an unsharpened image If sharpening is applied in the image processing the modulation may rise It shall not be higher than the value set in the specifications iQ Analyzer 163 9 MODULES UTT Q Color MisRegistration Sampling Efficiency MTF 10 MTF 50 Sampling Efficiency Claimed Sampling Rate Obtained Sampling Rate Resolved Elements Shading The diagram represents the shift of color channels to each other Sampling efficiency displayed horizontal vs vertical If the limiting frequency at 10 modulation equals Nyquist frequency sampling efficiency ist 100 The absolute comparison is shown in the lower center diagram MTF 10 is the highest spatial frequency with with a modulation greater or equal 0 1 10 MTF 50 is the hig
19. distance in pixel between the green and red channel CA G B max10 The mean value of the ten largest distances between green and blue LCA Longitudinal Chromatic Abberation LCA horizontal Longitudinal chromatic abberation in horizontal direction measured on the center cross horizontal part of cross LCAvertical Longitudinal chromatic abberation in vertical direction measured on the center cross vertical part of cross LCA mean mean value of the longitudinal chromatic abberation iQ Analyzer 135 9 MODULES DISTORTION Q 9 6 5 Available distortion charts These chart layouts are provided as default with the iQ Analyzer Version 6 Other designs and custom made chart layouts could be added on request For a detailed describtion of the charts please see chapter 10 CHARTS USED FOR iQ ANALYZER Distortion and Chromatic Aberration LESS Crosses Dot Chart Distortion and Chromatic Aberration TE260 Gouble sided 31 and 15 lines of dots iQ Analyzer 136 9 MODULES HISTOGRAM Q 9 7 HISTOGRAM The histogram modul calculates the intensity histogram and detects pixel that are outside the expected tonal range e g dead or hot pixel These pixel are saved in a table that can be imported by a camera for correction or used by external software Wi His Histogram tab 9 7 1 Settings SETTINGS Analyze Presets Select the image layout You can choose between three presets Black Image A b
20. files are now listed in the table The filename is displayed followed by the appropriate chart layout and setting you choosen in step 2 and 3 For adding more files to the list click again the button To add files containing other test patterns start again with step 1 choose the appropriate chart layout step 2 and the setting step 3 and add files to the list Ty step 4 You can delete files of the list Mark a file by clicking on it Delete it by clicking at the symbol To delete the whole list click on the C button If you like to correct any setting of a listed file select this file by clicking on it It will be i apply marked in blue Then make new selections for step 1 to 3 and confirm by clicking at the button apply The information next the filename changed to your actual selection You can review the settings for each file by having a look at the filelist or by choosing a file out of the list and click on it The selected layout and setting will be displayed in the sections above Start analysis Press the Start button on the right of step 5 The iQ Analyzer starts calculating start Display results When the software has done the calculation the view switches to the module the test pattern belongs to If you choose test patterns of different modules the results are displayed in these different modules iQ Analyzer 23 5 GRAPHICAL USER INTERFACE HOME SCREEN Q Switch
21. gain modulation based on AE the blue line represents the gain modulation based on L The tolerance range that is defined in the specifications is displayed in green Values that are outside the tolerance range are outlined in red Value Violation Noise Noise measurement standard deviation STD is made using two methods 1 STD neutrals thin black line noise ist calculated on the patches of the gray steps Due to the production process of the chart the neutrals may show slight structures which lead to higher measured STD 2 STD sfrnoise blue line The resolution patches are selected because these patches do not exhibit any structure The measured standard deviation is a result of the noise introduced by the scanning device iQ Analyzer 161 9 MODULES UTT The tolerance range that is defined in the specifications is displayed in green Values that are outside the tolerance range are outlined in red Value Violation Color iQ Analyzer 162 9 MODULES UTT Q On the left side the numeric results for each patch are shown and the amount of the color diffence is visualized by colors from dark green AE 0 to dark red AE maximum value defined in the specification On the right side a visual comparison of the color paches are shown left image right reference The values for the color differences are defined in the specifications You can choose between the display of results for AE color
22. images percentual scale 100 correspond best quality Frequency Unit Resolition Select the unit of spatial frequency that is used in the output of output properties Resolution module LP PH linepairs per picture height LP Pix linepairs per pixel PPI pixel per inch 6 5 2 Filepaths amp Filehandling In these menus you can change the default folder for Chart layout and other files With you can browse to a different folder and confirm it Chart Layout Location Reference data of the chart layout The local folder Chart is set as default OECF Reference Data Location OECF reference data The local folder Data is set as default general properties iQ Analyzer 40 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Color Reference Data Location Color reference data The local folder Data is set as default Viewing Condition File Location Reference data of the viewing condition file The local folder Data is set as default Initial Setting File Location Setting file new setting myset that you can choose in Restore settings from this file 6 0 Settings amp StartUp Maximum Files in Memory Defines the maximum number of files that are at the same time in memory To find a tradeoff between reading the files and keeping them in memory depends on machine memory A usual value is 10 If you have huge files select a smaller value Default PPI resolution Main
23. it can be checked if the edge is treated differentially The table with text results contains information about the Edge SFR for the edges selectable by using the second dropdown menu The limiting modulations for which the resolution is shown default 10 25 and 50 can be specified in the Advanced Menu Also the visual MTF for the three viewing conditions sets is displayed Edge SFR Mean Edge iQ Analyzer calculates the average of all edges with the same modulation over the whole chart iQ Analyzer 114 Q 9 MODULES RESOLUTION N Example TE253 NoiseLab calculation of the four averages of the left and the right edges with same modulation The numerical results contain the limiting resolutions for each average Mod100 mean edges left 100 edges right 100 Mod80 mean edges left 80 edges right 80 Mod60 mean edges left 60 edges right 60 Mod40 mean edges left 40 edges right 40 Edge SFR Mean Sub iQ Analyzer calculates the average of all edges in one subchart The numerical results contain limiting reolutions for each subchart Example TE253 NoiseLab calculation of the average of the left and the right edges EdgesLeft mean edges left 100 edges left 80 edges left 60 edges left 40 EdgesRight mean edges right 100 edges right 80 edges right 60 edges right 40 MTF10 25 50 The limiting modulations for which the resolution in LP PH line pair per picture hight LP Px line pair per pixel and P
24. last several years are equipped with SSE2 All Intel Macs are equipped with SSE2 If you are unsure about your particular Windows PC you can determine SSE2 support by a free tool ProcFeatures It is available from Microsoft Sysinternals that will indicate if SSE2 is present on your system or not http technet microsoft com en us sysinternals bb897554 aspx n order to use the Video Module for live measurements not for video files an appropriate video input hardware isV needed If you do not use a DeckLink Multibridge or Intensity product by Blackmagic Design please refer to the list of the hardware supported by MATLAB s Image Acquisition Toolbox http www mathworks de products imaq supportedio html 3 2 SOFTWARE PROTECTION iQ Analyzer is protected with an USB dongle You have to connect the dongle to your system every time you use iQ Analyzer If you don t have a dongle please contact info image engineering de 3 3 INSTALLATION 1 Download and install MATLAB Compiler Runtime MCR Version 8 1 You will find it on the provided DVD or can download it here http www mathworks de supportfiles MCR Runtime R2013a MCR R2013a win32 installer exe iQ Analyzer 12 3 INSTALLING iQ ANALYZER Q If you experience any problems please contact info image engineering de Note The iQ Analyzer V6 needs the MCR version 8 1 Earlier versions of the iQ Analyzer use other MCRs Note for Mac OS X only Installing multiple versi
25. of the following options iQ Analyzer 27 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS RAW Q No Processing Deactivates options which influence image data Demosaicing Colorspace White balance White level is fixed the tonal curve is processed linear Output options are sett to Tiff output format 16 bit and default output flip Executable The location of the dcraw excecutable The iQ Analyzer comes with a version but you might want to use the latest one The default location is in 3rdParty dcraw in the iQ Analyzer man Folder Use to browse to any folder where you stored the dcraw executable Settings The iQ Analyzer provides a quick access to some of the most important options that can be used when calling dcraw As dcraw is a 3 party product please check the manpage of dcraw for details about the different options The settings will change the dcraw call Manpage of dcraw http www cybercom net dcoffin dcraw dcraw 1 html dcraw call iQ Analyzer starts dcraw with options that are defined on the dcraw manpage The dcwaw commands are displayed in the dcraw command line call dcraw call and result from the settings above In the presets standard configurations are stored If settings are done in the modules e g OECF RAW images can be analyzed in addition to JPG files Print verbose Messages not just errors and warnings If this checkbox is marked you are only informed that a file is processed suc
26. one in the center and four half stars in the corners of the target The stars are divided into segments and the resolution is measured for each of them There are eight segments for the center star and three for the corner stars Finally the mean value of the segments for each star and additionally for the corners the mean value of all four stars get reported 4 The 96 color patches base on the X Rite ColorChecker SG and are use for evaluation of color 2 P reproduction The patches are converted in the CIE L a b color space From these values the color distance Delta E is calculated that describes the color reproduction quality 5 For evaluation of camera nosie and the reproduction of details sometimes referred to as texture the six noise and dead leaves patches are used Top left there is a white noise patch sigma 1 16 The uniform patches top right are used for calculation of the noise corrected dead leaves power spectrum The dead leaves structure is made of circles in all sizes and colors at a limited cont rast level A fourier transform of an image of this structure taken with a camera provides the power spectrum that the camera is able to reproduce The red green and blue dead leaves structures are used to evaluate the resolution depending on the color 6 The markers are used for distortion measurement TV Distortion and lateral chromatic aberation iQ Analyzer 170 10 CHARTS USED FOR iQ ANALY
27. processing and quantization which varies from one image to the next If you have captured a minimum of eight images in a single session the temporal SNR is calculated too The temporal SNR is determined by measuring the standard deviation of the difference of each image and the average image minimum of eigt images and applying a correction to determine the true level of the temporal noise iQ Analyzer 80 9 MODULES OECF SNR Lesur 84M incremental temp temp romp Standard deviation of the temporal noise STD temp Oem 74 5 f Gay average standard deviation of the code values of all the differences of the average and the individual images that make up the average SNR fp Fixed pattern noise means unwanted variations which are constant for every exposure The ISO standard camera fixed pattern SNR is determined by Lue 84M incremental SNR iso_rp Ip gp standard deviation of the fixed pattern noise STD fp Gave Standard deviation of the code value of the average of n images Gur average standard deviation of the code values of all the differences of the average and the individual images that make up the average Visual Noise VN The numerical value for the Visual Noise is a weighted sum of the standard deviation of each channel in the CIE Luv colorspace To give further insight into the noise characteristics we also provide these values for all three viewing conditions that can be spe
28. red green and blue iQ Analyzer 182 10 CHARTS USED FOR iQ ANALYZER Q 10 23 TE269 OECF 36 Chart ISO 14524 15739 For high dynamic range cameras the OECF charts with patches calculated according to ISO 14524 are not that convincing Densities are calculated according to the cube root formula result in large steps in the high density patches Image Engineering s solution for the problem is the TE269 a 36 patch OECF chart which basically follows 29 31 32 30 ISO 14524 but implements additional steps especially at 33 35 36 34 higher density levels iQ Analyzer 183 11 COPYRIGHT AND TRADEMARKS 11 COPYRIGHT AND TRADEMARKS TRADEMARKS Windows is a registered trademark of Microsoft Corp Matlab is a registered trademark of Mathworks Corp Photoshop is a registered trademark of Adobe Systems Corp ColorChecker is a registered trademark of Gretag Macbeth AG COPYRIGHT INFORMATION By installing this software you accept and agree to be bound by the terms of the software license agreement that appears below iQ Analyzer USES OPEN SOURCE SOFTWARE FFmpeg Copyright 2000 2010 by the FFmpeg developers http ffmpeg org iQ Analyzer is distributed with an automated FFmpeg 32 bit Windows build made by Ramiro Polla FFmpeg is licensed under GNU LGPL http www gnu org licenses Igpl txt and GNU GPL http www gnu org licenses gpl txt licenses FFmpeg is linked with libX264 GPL You can download t
29. the Video Module PC users have to manually install the VLC Media Player It is necessary to make sure that the ActiveX Plugin option is selected during the installation The Video Module is currently not supported on Macs 3 4 ANTIVIRUS ISSUES Some few anti virus products may detect a virus in iqa6 exe in the iQ Analyzer folder This is a false alarm some code blocks are accidentally detected as a virus Please contact our support support image engineering de if you experience this problem Note for Mac OS X only Umlauts and other special characters are not supported on Mac OS X iQ Analyzer 13 3 INSTALLING iQ ANALYZER Q 3 5 SOFTWARE BY THIRD PARTIES iQ Analyzer uses open source software FFmpeg Copyright 2000 2010 by the FFmpeg developers iQ Analyzer is distributed with an automated FFmpeg 32 bit Windows build made by Ramiro Polla FFmpeg is licensed under GNU LGPL and GNU GPL licenses FFmpeg is linked with libX264 GPL You can download the complete source code used to build FFmpeg here http ffmpeg arrozcru org autobuilds VLC Copyright 1996 2010 by the VideoLAN Team iQ Analyzer is distributed with a Windows installer of VLC Player Please make sure the ActiveX plugin is installed in order to use the Video Module with video files VLC media player is licensed under GNU GPL http www gnu org licenses gpl txt You can download the complete source code here http www videolan org vlc
30. this button when playing the video Start Frames Tag Selecting a trigger in the table will navigate to its position in the video file You can delete triggers from the table using the button or clear the entire table using the C button The amount of frames to be captured can be edited in the trigger batch table for every single trigger You can also set a specific tag for every trigger in this table This tag is added to the file name of the acquired frames in order to easily handle multiple acquisitions 8 1 3 Advanced Settings live video sources and video files The Advanced Settings panel is activated using the Advanced button on the bottom of the Settings panel Save Frames A number of frames as defined by the Trigger Trigger Batch settings is saved as files Define folder file format and file name prefix Vectorscope Custom Custom layout files for the vercorscope s graticule containing the positions of the target fields can be selected here Custom files are provided on request iQ Analyzer 60 8 VIDEO Q Hardware Choose the color model that is used for the representation of the video signal RGB YCbCr or grayscale Press the Reset Hardware button if you have connected or detached a hardware device The search for the available devices is performed without the necessity to restart the iQ Analyzer Warning Level Define the warning levels for the visualization
31. to another module by selecting it from the above drop down menu The results and check images are stored automatically in the folder defined in the settings menu You can change the view of the results in many ways For detailed information see chapter results The results could be stored as iea file iQ Analyzer format so you will be able to reload it to use the iQ Analyzer with all different views as display application again How to use this option is described in chapter Import Export Further Analysis If your analysis is finished go back to the iQ Analyzer Home to start a new measurement by selecting Home from the above drop down menu 5 1 3 Administrator worklflow As administrator you prepare the whole analysis for the opterators which afterwards just have to choose the predefined settings and start the analysis Following this principle you can ensure all operators use the same settings All of your results will be absolutely comparable at any time e The iQ Analyzer Home contains default chart layouts Chart layout files are created by Image CHART LAYOUT FILES Engineering The chart layout files are stored as new chart chart files in the folder C Program Files lmage Engineering iQ Analyzer 6 0 0 Chart To add a new layout to the iQ Analyzer Home first add this chart layout file to the defined folder Now it is available in the selection of chart layouts of the module when using the administrator mode Sec
32. values can be displayed using the data utility To export them there are two different ways At first the values can be marked manually Mark more than one by holding the shift key while selecting Using copy amp paste to insert these values to any other document The second option is to use the Export button The results for each measurement value are printed in a report style or not using one page for each value Each value is added by two prints of the selected utilities at the time of taking the value This report is either stored as pdf file or as postscript file due to the settings see 66 5 1Output iQ Analyzer 145 X MODULES 42 Q 9 9 42 The module 42 is designed to analyze the test chart Forty Two TE42 With one single chart OECF Opto Electronic Conversion Function dynamic range resolution shading distortion lateral chromatic aberration color reproduction and kurtosis parameters can be measured according to ISO standards and analysed with the corresponding software iQ Analyzer The settings in the differen SETTING t modules that are used for the module 42 can be seen if you load the TE42 myset in the setting module LE NENNEN 42 tab 9 9 1 Settings Other than in the different modules nearly all settings for the TE42 are predefined and stored within the 42 file So there are no Advanced Settings availbale SETTINGS Illumination lux Set the illumination of the chart
33. viewing conditions button opens the adjustment for the viewing conditions To edit and or create your own ies files load one ies file by presing the Load button and change the default values Name your setting and press the Save button Exit closes the window edit the viewing conditions The ies files are stored in the folder you select in the settings The default folder is C Program Files Ilmage Engineering iQ Analyzer 6 0 0 Data iQ Analyzer 46 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS The default view ies contains three settings Set 1 100 view on a monitor 0 5 m viewing distance 96 ppi monitor resolution Set 2 Print with 10 cm height calculate viewing distance auto Set 3 Print with 40 cm height calculate viewing distance auto Both prints are supposed to be observed at a viewing distance of the diagonal of the print auto The minimum is 25 cm Use iQ Analyzer V5 calculation method The default calculation of the iQ Analyzer Version 6 is according to the reference implementation of the 1S015739 2013 standard This implementation has slight differences to the implementation in previous versions of the iQ Analyzer Enabling the old calculation method should only be used for camparison reasons We recommend to switch to the implementation from Version 6 as soon as possible For details see out Technote here http www image engineering de library m technotes 707 visu
34. which is dependent on the source reference white Xws Yws Zws and the destination reference white Xwo Ywo Zwo Xo Yo Zo Xs Ys Zs M The idea behind all of these algorithms is to follow three steps Transform from XYZ into a cone response domain p y B 2 Scale the vector components by factors dependent upon both the source and destination reference whites 3 Transform from p v B back to XYZ using the inverse transform of step 1 These steps are represented by the three matrices iQ Analyzer 86 9 MODULES COLOR Po Ps m m 0 YolYs 0 Pol Bs o Ys Bsl Xws Yws Zus 1M 4 Pp Yo Bo Xwo Yo Zw IM 4 By using the dropdown menu you can choose a method for chromatic adaption The differences among the three methods lie in the definition of the cone response domains Ma von Kries XYZ Scaling none Bradford The Bradford method is the newest of the three methods and is considered by most experts to be the best of them This is the method used in Adobe Photoshop von Kries Use von Kries for chromatic adaption XYZ Scaling XYZ Scaling is generally considered to be an inferior chromatic adaptation algorithm Incidentally this is the method that would result from transforming the source XYZ color to Lab using Xws Yws Zws followed by conversion back to XYZ using Xwo Ywp Zwo none no chromatic adaption method is used Method M M 1 0 0 0 0
35. 0 1 0 0 0 0 0 XYZ Scaling 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 8951 07503 0 0389 0996993 g 430395 0 00825 Bradford 0 2664 1 7135 0 0685 0 147054 0 518360 0 040043 0 1614 0 0367 1 0296 0 159963 0 049291 0 968487 040024 022630 0 00000 1959936 02679 0 000000 Von Kries 0 70760 1 16532 0 00000 1 129382 Pon 0 000000 0 08081 0 04570 0 91822 0 219897 0 000006 1 089064 definition of the cone response domains of the three methods for chromatic adaption iQ Analyzer 87 9 MODULES COLOR White Point By using the dropdown menu you can choose the image white point which is required for transfoming XYZ to Lab White Point White Reference in Image M ite Reference in Image White Reference in Image the white patch in the image is used as white point Selecting Image Reference White Profile the white point saved in the image profile is used as white point Note The profile is defined in the Color Space option in the Meta section E g if you select sRGB the sRGB profile is used Absolute Color Difference Select this check box if you want to get results with absolute values Absolute values only represent the amount of color diferences not the direction Match Ref White to Image White If enabled the white patch of the Color Chart is forced to become Lab 100 0 0 Warning level By inserting values for delta E L C H and VN visual noise you can scale the color bar
36. 0 and 140 in sRGB CIE L DEES 50 If the checkbox is enabled a warning appears if the required values are not reached iQ Analyzer 76 9 MODULES OECF According to ISO 15739 2013 this checkbox is automatically enabled when ISO 15739 2013 is choosen Check number of saturated Patches If more than three patches are in saturation a warning is displayed important for calculation refering to ISO 15739 2003 Luminance and Density Data To create new luminance and density data or edit existing files use Luminance and Density Data the button Luminance and Density Data An editing window appears At the left side the density values could be adjusted at the right side the luminance values Depending on the chart insert the number of patches used for OECF and used for noise measurement For every patch the density respectively luminance values have to be inserted You can enter data either manually or use the Import button to import existing files possible files are den lum 120 112 txt files for density and luminance The structure of the txt files that can be imported has to be as follows First row density luminace values decimal points separated by using tabs Second row values of the three noise patches decimal points separated by using tabs Que festeton Ansche Enfugen Format D 4 A Dr cken Se F1 um de rfe sufsunden txt file of density lumin
37. 4 3 The ROls are indicated by rectangles Activate the rectangles by clicking the border Now you can adjust the ROIs manually x m cut out TE241 and ROIs Ill When the manual adjustment of ROIs is done double click on the image and the analyzing process starts Manual Mode FreeEdge TEO00 FreeEdgeChart chart only The Manual Mode for the FreeEdge chart layout is concepted slightly different iQ Analyzer 69 9 MODULES SETTINGS Q Add a defined number of ROIs Insert the number of ROIs you want to add to the image After confirming by clicking the Add RO button you can stretch the ROIs one after the other in the image by click and draw with the mouse To add further ROIs define again the number of ROIs and click again at the button Fixed size pos Define the position x y and the size w h of a ROI in pixel Ad 1 ROI to the image The ROI will appear at the defined position and has the defined size Edit ROI Activate this button and click inside of a ROI The outline of the ROI gets adjustable Remove ROI Activate this function and click inside of a ROI The ROI will be deleted immediately Proceed Proceed starts the analysis of all inserted ROIs Export Export the positions of the ROIs as text file The file can be used again for later analyses see Fix Mode Example l Select the TEO00 FreeEdgeChart chart layout file choose Manual
38. 5 aspx 9 10 1 Settings SETTINGS After selecting the chart layout the UTT module needs the following adjusment Reference Data The reference files for the UTT charts are excel files The files are delivered with your chart Use always the correct reference a E UTT MetaData A1 xls file for you chart UTT MetaData A2 xls UTT MetsData A3xls UTT MetaData A4xls Specification The specification files define tolerance ranges for the results Detection Mode The manual mode is time and memory consuming In most cases the automatic mode works satifactorily Note A further adjustment for the Manual Mode is contained in the advanced settings ADVANCED SETTINGS RGB Profile if embedded Profile cannot be read For calculation of the image the embedded profile is used If the profile cannot be read or no profile is embedded the profile is used that is set here The specifications describe the profile that is ColorSpaceWarning used for comparison of the image Most m s i Selected embedded RGB Profile is sRGBIECB1966 2 1 specifications use the eciRGB profile version 2 ColorSpace in SpecFile isl ecRGBv2 for calculations and comparison If the image Please select another RGB Profile or check Specifications contains a different profile than eciRGB v2 a Co warning appears that the profile of the image do not conform to the profile of the specification Manual Mode in ROI Detection
39. 8 color patches and a 6 step gray scale iQ Analyzer 172 10 CHARTS USED FOR iQ ANALYZER Q 10 7 TE219 Noise Measurement Test Chart ISO 15739 The TE219 is designed for noise measurement of still video It consists of circular and horizontal positioned gray fields one gradient field and one field containing a diagonal multiburst with different frequencies The chart has a contrast range of 20 1 80 1 160 1 or 1000 1 10 8 TE223 HDTV Log Gray Scale Test Chart 13 steps The TE223 is designed for evaluation of the halftone reproduction of electronic cameras Two 13 graduated counter current gray scales are arranged on a gray background The gray scales being graduated logarithmically The chart has a contrast range of 200 1 10 9 TE226 HDTV Color Rendition Test Chart The TE226 is designed for the evaluation of the color rendition of HDTV cameras The chart consists of 36 color patches and a 9 step gray scale In addition to the primary and secondary colors the test chart contains mainly the colors which are critical in reproduction e g dark and light skin tones foliage blue sky orange violet and others 10 10 TE230 X Rite Color Checker SG The Digital ColorChecker Semi Gloss SG is specifically designed to meet the needs of digital photography It consists of 140 patches includes standard ColorChecker skin tone reference colors and gray scale steps It is mounted on an aluminium plate
40. AE corrC provides the color error which is corrected with the average offset of the saturation C SHADING To provide a meaningful measure of the intensity shading the tone curve of the system under test is need In the previous versions of the iQ Analyzer the only option was to use the measured OECF of the device under test either directely from the OECF module Use current OECF or to load a result file Load OECF The Use Profile option is now also availbale In this case the tone curve is extracted from the ICC Profile as specified in the Meta section and used for linearisation This is much more flexible as th OECF measurement is not needed but also less acurate as most cameras tend not to follow excactely the tone curve of the profile So use with care RESOLUTION The linearisation if the image data is an important step for the MTF SFR measurement For the SFR_Siemens method it is even more important compared to SFR_Edge As the Siemens star in the different test charts TE253 TE268 TE42 etc cannot provide very low spatial frequencies the linearisation is also used to normalize the modulation transfer to 1 for the spacial frequency of 0 This is done in the MTF option by subtracting the black value of the measure OECF to force the black patch to become 0 In Version 6 we provide another linearisation method Selecting Normalized the Image Data is normalized without the black subtra
41. Advanced Settings DR_temp The temporal dynamic range is only available when using the new version of ISO 15739 standard The value for Lmin shal be calculated as Tremp 2 0 Lyin 9 for temporal noise and incremental gain iomp 2 0 black tempral noise measured at density of 2 0 The black temporal noise is derived by measuring the standard deviation of the difference of each image and the average image and then applying a correction to determine the true level of the temporal noise romp 74 Z iff romp Standard deviation of the temporal noise Gan average standard deviation of the code values of all three differences of the average and the individual images that make up he average iQ Analyzer 82 9 MODULES OECF Q Output referred results WB DV WB DR DV ISO Whitebalance represented in digital values The mean difference between Red Green and Blue Green As the chart is perfect gray the ideal would be 0 average of the CIE C chrominance values dynamic range explained in digital values means the difference between mean digital value of the last patch i e patch 20 and mean digital value of patch 1 Ideal would be 256 8 bit The ISO speed is calculated There are three different definitions in the ISO standard The idea is to measure the light intensity on the sensor which leads to a specific result in the image ISOsat ISO S N10 ISO S N40 saturation based ISO spe
42. GHT AND TRADEMARKS eian aiai tete tnnt tenete tnn tnn iQ Analyzer 4 1 INTRODUCTION Q 1 INTRODUCTION The iQ Analyzer is an executable program for Windows and MAC It analyzes digital images and video frames using specified test charts Depending on the version you received different test charts are supported Using the full version of the iQ Analyzer you will get information about all important characteristics of a digital camera system including OECF e Dynamic Range e White Balancing e Noise and ISO Speed e Visual Noise MTF e Limiting resolution e Distortion lateral and longitudial chromatic aberration e Vignetting Shading e Color reproduction For more information please see our website www image engineering de iQ Analyzer 5 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 2 1 NEW FEATURES The iQ Analyzer Version 6 offers some exceptional new features This section gives you a short preview A detailed description and instruction how to work with these functions is contained in this manual HOME SCREEN The Home screen offers you a completely new and simplified user guidance for doing everyday measurements All settings are saved once by an administrator The administrator can set up buttons with own icons and text The operators just select the chart layout and the predefined setting add the files which should be
43. I The ROI region of interest of the video can be selected Press the ROF button in the bottom left corner Select the ROI by adjusting the rectangle in the display Press the Confirm button to crop the image To see the full image again press the Full button Preview initial ROI adjusted ROI confirmed ROI Video files You can navigate through the video file using the timeline slider or play and pause the video by using the Play Pause toggle button iQ Analyzer 62 8 VIDEO Q MEASURE LIVE VIDEO SOURCES ONLY Measurement instruments such as histogram display waveform monitor and vectorscope provide a quick overview Preview Display Select a single video line to be analyzed by Clicking into the display on the preview panel Choose between Color Luma and Blue view The preview display can be switched off if not used this can improve the performance of the other displays Histogram Display The histogram can be displayed for the luma signal Y the color difference signals Cb Cr and the color signals R G and B The upper horizontal axis shows digital values 0 255 Digital video signals range from 16 to 235 indicated with the dotted line Values between 0 and 16 and 235 and 255 are reserved for the foot and the headroom The lower horizontal axis displays the digital values 16 235 as percentage The histogram display can be switched off if not used this can im
44. Install MxNET service mxnet32 exe r Uninstall MxNET service iQ Analyzer 16 3 INSTALLING iQ ANALYZER Q 3 6 3 Matrix Net MATRIX NET After starting the Matrix Net program a dongle symbol is displayed in the task bar Clicking on this icon will activate the 16 49 28 03 2011 Matrix Net dialog Enter a name for the program in the field Application of the MxNet program e g iQ MATRI NET E Server File Analyzer The name can be anything you eset m Network SharedFokler Analyzer m like and it does not need to match the actual application name The network licenses will be managed using the server file NetworkSharedFolder iQ Analyzer mx in OIA mmm q this example The name of the server file ServerFlle WietwciSharedFoldeNQ Analyzer me must always be entered with the absolute uIWD CENC S 030 User TimeOut 60 mm AeiveUsws 0 Peite emy a path and correspond to the naming d conventions of the operating system REFRESH TIME In this field the time interval for the refresh of the server file is set The last refresh carried out is displayed in the Last Refresh field The refresh period should usually be selected to be between 5 and 10 minutes USER TIMEOUT The User TimeOut is the time limit after which the user is automatically removed from the server file In the case of abnormal termination of the application crash on a client this function ensures the releas
45. Lin Source None deactivates linearisation for calculation MetaData Linear assume gray patches to be linear den files are files with includes patch densities for linearization Type Defines the aim function MTF forced all values in the image towards zero by the minimum value So the minimum in the input image is set to zero in the linearized output image The maximum in the input image is set to the maximum signal level so the result is 0 to Imax Imin lw Minimum of input image lw maximum of input image iQ Analyzer 104 9 MODULES RESOLUTION FullDataRange uses the full bitdepth of an image Linmin 0 Ling 2 1 255 for 8 bit Ling minimum of the linearized image Linmas aximum of the linearized image FulllmageRange depicted the minimum and maximum digital value of the input image as minimum resp maximum digital value in the output image Imi tO Imax Litnin Imin Liftmax Imax poly fit The degree of polynomial fit for linearisation can be adjusted default 4 Lin Source If Global menu Gray Patches is selected Lin Source defines which subchart is source for linearization ADVANCED SETTINGS NOISE PATCH Reduce Shading In case of strong shading you have the opportunity to use a shading correction based on the shading measurement Using this method produces E Reduce Shadina better results Make a shading calculation one or more images in the Shading module and
46. PI pixel per inch is shown default 10 25 and 50 can be specified in the advanced menu MTF The percentual value describes the acual area beyond the curve in comparison to the ideal area vMTF Set 1 3 Similar to the visual noise which quantifies how well a human observer can recognize noise the visual MTF implicates the three defined viewing condition sets The calculated and the ideal MTF are multiplied with the contrast sensitivity function CSF which depends on the viewing condition sets for visual noise The two integrals are devided Multiplied with 100 you get the visual MTF vMTF in percent FitError For the SFR Edge approach an ideal line along the edges has to be determinded The FitError shows how well this line could be fited into the real image data The lower the value the better the fit Misreg RG The Misregistration of the red channel in an RGB image to the green channel This value is calcuated based on the edge spread functions in the different channels and is reported in pixel A value of 2 mean that the red channel is off by 2 pixel to the green channel orthogonal to the evaluated edge iQ Analyzer 115 9 MODULES RESOLUTION Q Misreg BG Same as Misreg RG but for the green and blue channel Over Under Calculatd based on the edge profile these values report the found undershoot and overshoot which is an effect of sharpening It is defined as max over max max 100 for Overshoot cor
47. POSE IT IS SOLELY THE RESPONSIBILITY OF THE CONSUMER TO DETERMINE THE SOFTWARE S SUITABILITY FOR A PARTICULAR PURPOSE OR USE IMAGE ENGINEERING DIETMAR WUELLER AND ANYONE ELSE WHO HAS BEEN INVOLVED IN THE CREATION PRODUCTION DELIVERY OR SUPPORT OF THIS SOFTWARE WILL IN NO EVENT BE LIABLE FOR DIRECT INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES RESULTING FROM ANY DEFECT ERROR OR OMISSION IN THE DISKETTE OR SOFTWARE OR FROM ANY OTHER EVENTS INCLUDING BUT NOT LIMITED TO ANY INTERRUPTION OF SERVICE LOSS OF PROFITS OR GOOD WILL LEGAL ACTION OR ANY OTHER CONSEQUENTIAL DAMAGES THE USER ASSUMES ALL RESPONSIBILITY ARISING FROM THE USE OF THIS SOFTWARE FOR WHICH IMAGE ENGINEERING DIETMAR WUELLER SHALL HAVE NO LIABILITY REGARDLESS OF WHETHER SUCH USE IS LAWFUL OR FORSEEABLE IMAGE ENGINEERING DIETMAR WUELLER SHALL HAVE NO LIABILITY FOR ANY DATA OR PROGRAMS STORED BY OR USED WITH THIS SOFTWARE INCLUDING THE COSTS OF RECOVERING SUCH DATA OR PROGRAMS IMAGE ENGINEERING DIETMAR WUELLER RESERVES THE RIGHT TO MAKE CORRECTIONS OR IMPROVEMENTS TO THE INFORMATION PROVIDED AND TO THE RELATED SOFTWARE AT ANY TIME WITHOUT NOTICE Document version 6 0 6 iQ Analyzer 185
48. Q Analyzer 142 9 MODULES MEASUREMENT Contour The Contour utility displays the digiatl value following the contour of the tool The values could be displayed seperated for Y R G B or combining all channels line tool The contour follows the line Note The line tool has a start left side and an end point right side If you reverse the line the value picking still will beginn at the start point the former left side rectangle tool The contour follows the rectangle clockwise beginning with the top left edge circle tool The circle tool starts the contour at the right side 3 o clock position and follows the circle clockwise 7 Histogram The histogram of the selected ROI is displayed The view could be seperated to Y R G and B or YRGB iQ Analyzer 143 9 MODULES MEASUREMENT Q Data Choose Data to display the measurement values you capture The values correspond to the table at the bottom right of the screen The x axis shows the ID number of the value except histogram and contour The values are plotted for R G and B except histogram and contour The values are added either by clicking at beyond the table or by typing m at your keybord mean the mean value of the selected ROI std standard deviation between the values of the selected ROI max plots the maximum value for selected ROI min plots the minimum value for the selected ROI mean histogram plot of the hi
49. R QA 62 Slanted Edge Scanner Target with Gray Scale Forty Two LE Multi purpose chart for high speed camera testing TE253 Modulated Sinusoidal Siemens Star iQ Analyzer 118 9 MODULES RESOLUTION TE253 Modulated Sinusoidal Siemens Star 9x 9x 9 Siemens stars slanted edges noise patches TE261 Slanted Edges TE262 Universal Test Target UTT Lens Resolution Test Chart TE268 25 modulatet sinusoidal Siemens stars slanted edges dead leaves patches iQ Analyzer 119 9 MODULES SHADING Q 9 5 SHADING Shading describes the loss of intensity from the center of an image to the corner Shading includes the vignetting of the lens and all other effects that may cause a loss of light iQ Analyzer uses the OECF to calculate the shading in f stops CETTE Shading tab 9 5 1 Settings Before starting analysis of shading charts you have to define some settings SETTINGS iQ Analyzer needs OECF data for Linearisation Current OECF X O 1 Assume Linearity Actual OECF iQ Analyzer uses OECF data that is Load OECF actually calculated and displayed in the Use Profile OECF module dropdown menu for OECF data Assume Linearity Shading can be calculated without a related OECF file If no OECF is specified a linear OECF can be used If you use the linear OECF and your device does not work linear the results for the shading calculated in f stops will be incorrect Load OECF If yo
50. S UTT Q Used patches for measurement exemplified by the A3 format tines Resolution I Gray steps LI Color patches L shading Distortion Lines The yellow marked areas are used to test for dead lines that can occur during the scanniung process and for shading loss of intensity Resolution The nine red marked areas are used for resolution measurements Gray steps The blue marked areas are the four gray steps Color patches The two black marked areas are used for color measurements Shading Distortion The green marked ares are used for measurement of shading and distortion Within the green rectangles the average of the white and the the average of the gray patches are determined for calculation of shading Also the distances of the black lines are determined for distortion measurement Note If an error message about not enough memory appears you may try one of the following points e Restart the software e Reboot windows e Reduce volume of data because large image flles might always lead to a memory error Try to reduce the amount of data e g by reducing from 16bit to 8bit externally or cropping unnecessary areas iQ Analyzer 152 9 MODULES UTT Q e Do not use the Manual Mode for detecting the ROIs and leave the Rotate Image menu to 0 e Windows only increase virtual Memory and or activate 3G switch see Tech Note e http technet microsoft com en us library bb1 248 10 EXCHG 6
51. TT Enables the administrator functions Set individual limits and tolerances to classify your results available only using the administrator mode This menu contians adjustments for the export of graphical data available only using the administrator mode The settings menu contain all general settings available only using the administrator mode Information about installed iQ Analyzer version iQ Analyzer 22 5 GRAPHICAL USER INTERFACE HOME SCREEN Q 5 1 2 User workflow Starting the iQ Analyzer Version 6 will lead you to the Home screen Step 1 choose module Start in the left column Select the module you want to do evaluations with by clicking on it This limits the available chart layouts in the next step to the ones related to this module If you do not make this selection remain with default All all available chart layouts are displayed Step 2 choose chart Choose the appropriate chart layout out of the middle column The thumbnails of the charts and the chart name will help you to pick out the right one Step 3 choose settings In the right column all predefined settings appear which are deposited for the selected chart layout Choose the one matching to the analysis you are going to do Step 4 Choose files Use at the bottom of the table to add a file to the list A new window opens where you can navigate to the folder your test images are stored in and select one ore more images This
52. YZING PROCESS AND RESULTS 7 1 ANALYZING PROCESS 7 8 RESULTS 7 2 1 Graphical presentatioi 7 2 2 Multiview display 7 2 3 Export graphical results 7 2 4 Numerical results 7 2 5 Export numerical results Settings for live video sources 2 Settings for video files 3 Advanced Settings live video sources and video files 4 Preview Measurement and Comparison mode 8 1 5 Pass stream to Measurement 9 MODULES 9 1 SETTINGS 9 1 1 Settings 9 1 2 Advanced Settings 9 2 OECF 9 2 1 Setting 9 2 2 Graphical presentation 9 2 8 Numerical results 9 24 Available OECF Charts 9 3 9 3 1 Settings 9 3 2 Graphical presentatioi 9 3 8 Numerical results 9 3 4 Available color charts 9 4 RESOLUTION 9 4 1 Settings 9 4 2 Graphical presentatioi 9 4 8 Numerical results 9 4 4 Available resolution charts 9 5 SHADING 9 5 1 Setting 9 5 2 Graphical presentatioi 9 5 8 Numerical results 9 5 4 Available shading charts 9 6 DISTORTION 9 6 1 Settings 9 6 2 Analyzing process 9 6 3 Graphical results 9 6 4 Numerical results 9 6 5 Available distortion charts 9 7 HISTOGRAM 9 71 Settings 9 72 Graphical representatioi 126 427 134 136 iQ Analyzer 3 9 7 3 Numerical results 9 8 MEASUREMENT 9 8 1 Settings amp Meta data 9 8 2 Navigator amp Control Panel 9 8 8 Utilities Numerical r
53. ZER 7 Shading describes the loss of light from the center of an image to the corner and is measured on the gray background For visual appraisal of reproduction of details several elements are used structures skin tones and resolution wedges 10 3 TE106 Color Bar Test Chart The TE106 is designed for checking the color rendition of TV cameras The picture area is divided into six color bars showing the three primary colors red green and blue and the secondary colors cyan yellow and purple in addition there is one bar of white and black The succession corresponds to that of an electronically generated color bar ROls an name of specific color white iQ Analyzer 171 10 CHARTS USED FOR iQ ANALYZER Q 10 4 TE165 Log Gray Scale Test Chart 11 steps The TE165 is designed for evaluation the halftone reproduction of 16 9 electronic cameras Two 11 graduated counter current gray scales are arranged on a gray background The gray scales being graduated logarithmically The contrast range of the gray scales is 40 1 10 5 TE169 EBU CAM Test Chart EBU Tech 3237 TE169 is designed to measure color reproduction The chart consits of 18 color patches and six patches from white to black 10 6 TE188 Color Rendition Chart X Rite ColorChecker The TE188 was designed with respect of the well known ColorChecker Used in photography film and TV the chart consists of 1
54. ages is saved Content of result file Define which information is stored to the result file Header information about evaluation software version file name file data EXIF data Results relevant results All Data all measured values Settings setting information Comma if enabled the text output is given with a decimal comma instead of point which can make the import to MS Excel much easier If Result File exists If a file is already analyzed there are different options how to deal with the existing result files iQ Analyzer 39 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Q Add Index to ResultFiles new results are saved in a new file with an index e g oecf oecf1 oecf2 Overwrite the old results are replaced by the new ones Ask for new name if the result file exists you are asked for a new file name Text Output Define the format of the result file Since iQ Analyzer version 6 you can choose between txt and xml file TXT file all numerical results and data according to text output selection will be stored in an text file XML file all numerical results and data according to text output selection will be stored in an XML file TXT amp XML file all numerical results and data according to text output selection will be stored as text and as XML file Output JPEG Quality Depending on the module some check images are saved automatically Define the qualtity of the exported JPEG
55. al noise the differences in implementation Note this option will be no more available in futur versions of the iQ Analyzer Exponent if gt 1 The results of the visual noise calculation can be spread out Specify an exponent We recommend an exponent 1 to get the original results iQ Analyzer 47 7 ANALYZING PROCESS AND RESULTS 7 ANALYZING PROCESS AND RESULTS 7 1 ANALYZING PROCESS Having done the setup up you can press the Start button and the analyzing process starts In the upper frame you see the progress bar The numeric results and an image with marked ROls are saved automatically as text and JPEG files depending on your export settings made in the settings Using the Stop breakes the analyzing process Stop __Patch Locationtof4 oo progress bar and Stop button Depending on the amount of images the calculation time extends If a file could note be analyzed the calculation process will go on with the next file in list Each file path in the file list is preceded by an icon which show the status of each file a gray dash informas you that the file is not processed yet a green check marks a file which analysis is completed and a red cross shows that an analysis fails During analyzing process warnings could be displayed if not disabled in the settings They give you information about uncommon image property and the way the iQ Analyzer deals with this That might be a hint that an i
56. al results can be hidden So there is more space available for the graphical presentations which allows to enhance visibility of details exspecailly when using the multiview function 2 2 NEW ALGORITHMS AND METHODS OECF VISUAL NOISE The IQ Analyzer is capable to calculate the Visual noise metric since Version 3 At the time of first implementation the algorithm was an informative appendix to the ISO 15739 standard With the development of the latest version of the ISO standard ISO15739 2013 making the visual noise approach normative Image Engineering actively worked together with the workgroup at ISO to get a reference implementation The implementation in Vesion 6 of the iQ Analyzer is the reference implementation of ISO15739 2013 Even though the differences are small if you prefer to keep the algorithm to the previous implementation see the Setting section of the iQ Analyzer and enable Use iQ Analyzer Version 5 method iQ Analyzer 10 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 Q COLOR The average over all patches of L and C of the reference and of the image data is calculated The L level and C level the iQ Analyzer Version 6 provides a metric for average offset of L and C between image and reference 100 means reference and image data have the same average value The offset over all patches can also be subtracted from the individual patch providing a metric for the offset corrected values So
57. all neccessary information about the chart layout TE240_18021550 chart For the Histogram module there are now specific layouts due selct the chart layout to a chart but the selction of black white or gray image The layout selection in some modules needs specific options concerning this chart layout These options are described in the related chapters Reference Data Most modules require a reference file By using the dropdown menu you can choose the reference data of the TE219 OECFI2 chart chart layout you use for analysis selct the chart layout Calculate visual noise Some of the modules offer the calculation of visual noise If you like to compute this data mark up the checkbox The result will be saved Calculate Visual Noise and displayed in the graphical result This increases the processing time Detection By using the dropdown menu you can choose if the ROI region of interest detection is done automatically or manually There is Manual Mode anew concept inserted for the FreeEdge layout Fix Mode which allows you to store the location of manual set ROIs to use them for futur analyses The manual mode might be time consuming Not all modules offer the manual mode option iQ Analyzer 67 9 MODULES SETTINGS Q Automatic mode Semiautomatic mode Manual Mode Default and recommended mode where the software detects all ROIs automatically and start analyis immediately In most cases the auto
58. alyzer can detect and correct the influence of distortion Disable to accelerate the calculation Recommended is to activate Adapt Analysis to Distortion f activated the iQ Analyzer multiplies the radii with a measured correction factor so it ensures that the analysis is done on the right position in the image SubCharts Select the subcharts stars you would like to analyze If All is enabled all subcharts are listed and analyzed For numbering of the subcharts see chapter 10 CHARTS USED FOR iQ ANALYZER Segments SFR Siemens i Select the segments you would like to analyze If All is enabled all eight segments are part of calculation Linearisation Most cameras for photography use have a non linear response to luminance in the scene This is called gamma function and tries to adjust the image to the human eyes reception of light To analyze an image this function should be inverted so called linearized This is done by reading the gray iQ Analyzer 100 9 MODULES RESOLUTION Q patches in the chart creating an OECF Opto Electronic Conversion Function and inverting this function Gray Patches MetaData Type poly fit Lin Source Analysis You can define the patches that should be basis for OECF calculation Local use gray patches in each subchart Global use one set of gray patches for the complete image define the set in Lin Source None mean
59. analyzed to the list and start the analysis Q iQ Analyzer HOME iQ ANALYZER 2 Another great advantage of the Home screen is that it enables you to assemble images of different chartlayouts at the same time The filelist of the Home screen contains every file with the associated chartlayout and setting After you have filled the list completely and started the analysis the software will go through all the different analyses until the end The Home screen acesses to the modules The results are displayed and stored as known before iQ Analyzer 6 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 FILE HANDLING The version 6 of the iQ Analyzer comes with a completely revised file handling The analyses of multiple files will now continue with the next file if an analysis failed The filelist shows by a small symbol if the analysis is outstanding worked completely or failed Now it is also possible to add further files to the list and analyze them without doing calculations for already completed files again Naturally it is still possible to calculate all again MEASUREMENT MODULE A new module is added which enables you to do some fast measurements Load images or pass a live video stream from the video module to the Measurement module Mark up special patterns or regions Move a ROI over the image field and the different utilitys at the right calculate the corresponding values The table enable
60. ance data iQ Analyzer 7 9 MODULES OECF Q You can save your settings by using the Save button and clear the list by using the Reset button To use your created edited data you have to save the data into the folder which is defined in the settings OECF Reference Data The local folder Data is set as default you can enter data manually import and edit data After saving close the window and your new created density or luminance data will appear in the dropdown list dropdown list is actualized after saving new density data file 9 2 2 Graphical presentation C image_engineering analyzer_5 lmageSef cam Density C image_engineering analyzer_S imageSet camy Y Exposure garithmic C image_engineering analyzer_5 ImageSet cam RGB Y Reflectance linear dropdown menu Below the graph some drop down menus are located The first one allows choosing the result you want to be displayed OECF Visual Noise VN Noise CIE Specific parameters OECF The OECF of the analyzed image s are shown It is a function of the digital number depending on the luminance The two red vertical lines show the dynamic range of the iQ Analyzer 78 9 MODULES OECF Q VN Noise CIE device Settings for the dynamic range can be made in the Advanced Menu the lower limit you define in Threshold The Visual Noise for the three Viewing Conditions are displayed that are defined in t
61. aphs numerical results and related data in report style So the results are directly ready for distribution copy amp paste tables Single or multiple cells of the tables can be marked and via copy and past inserted to any other document Fast exchange or discussion is possible using this feature without dealing with the complete output files iQ Analyzer 57 8 VIDEO Q 8 VIDEO The video functions of the iQ Analyzer are designed to link video sources to the powerful evaluation core of the iQ Analyzer Both live video signals and video files can be processed 8 1 VIDEO MODULE The Video Module introduces convenient acquisition of frames and passing them to any other iQ Analyzer Module for deep analysis For live video signals measurement tools are available such as waveform monitor vectorscope and histogram display Furthermore the versatile live analysis of color distance and creating own device specific color reference datasets can easily be accomplished Cs Video tab Note for analyzing videofiles it is necessary that the right version of the VLC player is installed iQ Analyzer is distributed with a Windows installer of VLC Player Please make sure the ActiveX plugin is installed 8 1 1 Settings for live video sources General In this section of the settings panel you can select the connected video input hardware used interface and video format Please note that the selection of the interface and vide
62. are displayed depending on the digital values In this example subtract background is enabled so that the digital value of the filtered image is set to 0 Histogram direct count Histogram log count iQ Analyzer 139 9 MODULES HISTOGRAM The two blue dashed vertical lines marke the defined tolerance range Pixel inside are inside the expected tonal range Pixel outside are detected as defect pixel In this example four pixel outlier are outside the range the dashed blue lines marke the tolerance range Pixel Map The Pixel Map indicates the outlier pixel in the image X and y axes are image width and height displayed in pixel In the result txt file the exact pixel postion for Y R G and B are displayed and saved Outlier 1 X 1034 Y 1598 Pixel Map with outliers indicated with the red arrow 9 7 3 Numerical results Below the graph two tables are shown with EXIF data and numerical results Outlier 4 pixel are outside the expected tonal range Cluster a cluster contains of at least two adjacent pixel Mean the mean value for luminance Y and the three color m channels R G and B is 0 Sigma the standard deviation for luminance Y and the three color foo fioo channels R G and B is 0 1 10 0 100 numerical result of histogram Thres High the mean value was set as 10 calculation Thres Low the mean value was set as 10 The stored text file contains all coordinates of the outliers
63. asurement is done inside the green marked rectangle displayed in the Image View The width of the squares are compared to the average width over the whole image The results of the distortion measurement are expressed as percentage Lines iQ Analyzer 166 9 MODULES UTT Q The white black and gray lines at the upper horizontal and left vertical boarder are checked if lines are outside the expected values So e g stripe patterns can be identified Before calculation the lines are shading corrected 9 10 3 Available UTT charts These UTT chart layouts are available For a detailed describtion including numering of subcharts an ROls please see chapter 10 CHARTS USED FOR iQ ANALYZER iQ Analyzer 167 10 CHARTS USED FOR iQ ANALYZER 10 CHARTS USED FOR iQ ANALYZER In this section the charts are described which could used with the iQ Analyzer The ROIs and suncharts are highlighted If patches and subcharts are numbered these nubers are depicted Further details and specifications to each chart you can find at our webseite http www image engineering de iq products iq charts test charts test charts by number 10 1 QA 62 Includes a dark gray 25 mm square rotated 5 degrees CW on a gray field Surrounding grayscale patches change in discrete steps from white to black Twenty patches are provided measuring 9x9 mm each The four corner crosses measure 2 625 66 68 mm center to center The upper r
64. at the current location of all the other cref files So this can be read in directly in the iQ Analyzer dropdown menus pvc reza satt en po Lo nm After you have saved the new cref file you can select this file in the reference file menu as Reference Data Now you can make your measurements as you are used to do The results you receive are now the difference of the current image and your master values iQ Analyzer 92 9 MODULES COLOR Q 9 3 2 Graphical presentation By pressing the Hesult button the results are displayed in the right screen Result button settings left screen graphical and numerical results right screen Specific parameters By using the left dropdown menu below the illustration you can choose which value shall be displayed Delta E Delta L Delta C Delta H or Visual Noise Visual Comparison 3D Bers iewin sion Set CE xY Viewing Conditon Set2 wb Viewing Condition Set 3 deta E v C anolyzer ImageSet color cem3_ccsg02 JPG Numerical Results Viewing Condition Set 2 dropdown menu for graphical representation Available files By using the second drop down menu you can choose between result representation of the particular image file file path is shown and representation of the average Average if you have selected Average in the output properties below the file list on the left side Graphical presentation By using the third dropdown menu you can
65. atch Reduce Shading In case of strong shading you have the opportunity to use a shading correction based on the shading measurement Using this method produces better results Make a shading calculation one or more images in the Shading module and export the results as iea file by using the Export Import menu Import the saved shading data and resolution is calculated with shading correction Export Import menu save shading results Select shading data iQ Analyzer 99 9 MODULES RESOLUTION After starting the Analysis a window appears that shows the files of the resolution file list with information about fstop k and focal length f Use the dropdown selection on the right of each file to match the resolution file with its corresponding shading file and press Proceed Limit iQ Analyzer calculates a limiting resolution from the MTF data which is the frequency that leads to a modulation as specified iQ Analyzer does a linear interpolation to determine the frequency Common values are 10 for limit and other MTF25 or MTF50 Frequencies derived from the SFR data based on these modulation E g 50 equals a MTF50 value the modulation is 50 at this frequency Default is 10 25 50 so three values are calculated MTF10 MTF25 and MTF50 Adapt Analysis to Distortion If the checkbox is marked the analysis can be adapted to the distortion of the chart the image is unchanged iQ An
66. aving options iQ Analyzer 53 7 ANALYZING PROCESS AND RESULTS Q Pan This functions enables you to pan the graph adjusting horizontally and vertically Zoom Click at the Pan button and than adjusting the graph with the mouse pointer in the Reset shape of a hand This might be interesting in combination with the zooming function Zoom The zoom function enlarge the graph left mouse click on the graph and zoom out right mouse click on the graph Rotate Enable Rotate and the cursor show a small circle when going over the graph Clicking and drawing rotates the graph Reset Cursor Clicking at the Reset button the graph is displayed again in the default way 7 2 2 Multiview display The iQ Analyzer Version 6 offers a great new option to display the results Up to four results of one or different modules can be displayd side by side For some values there is also an option available that arranges multiple results of one module all together in one diagram This function offers you the possibility to get a comprehensive overview for example about all test that are done with one camera or a comparative overview of different cameras In the result view two buttons are below the graphs available on SHOW RESULTS FROM CURRENT FILE LIST INSEPARATE GRAPHS Activating the first option show results in separate graphs opens automatically up to four graphs one for each fi
67. b values of the lower gray patches 1 and 2 of the UTT UTT L a b Delta L Delta E Gray patch 1 95 0 0 Gray patch 2 92 0 0 3 3 Gain Modulation based on Delta L is 2 77 3 00 0 92 A 92 OK Gain Modulation based on Delta E is 2 93 3 00 20 98 A 98 OK Color delta E is The average Mean the maximum Max Delta E of all color patches delta E Spec Tolerance limit defined in the specifications delta E Patch Patch number with the highest Delta E delta L is The average Mean and the maximum Max Delta L luminance of all color patches delta L Spec Tolerance limit defined in the specifications delta L Patch Patch number with the highest Delta L delta C is The average Mean and the maximum Max Delta C chrominance of all color patches delta C Spec Tolerance limit defined in the specifications delta C Patch Patch number with the highest Delta C delta H is The averge Mean and the maximum Max Delta H hue of all color patches delta H Spec Tolerance limit defined in the specifications delta H Patch Patch number with the highest Delta H iQ Analyzer 457 9 MODULES UTT Q Grid Delta White is Delta White spec_Max Delta Gray is Delta Gray spec_Max Distortion is Distortion spec_Max Resolution Absolute reference values Ref for the luminance of the white patches of the checker board and the differences Delta L between the reference and the sample Maximum
68. c number of radii Analyse radii from __ Nyquist to 6 Nyquist You can select in which range of radii the iQ Analyzer calculates the modulation The values are given as a percentage of the Nyquist frequency So if the Nyquist frequency is 1000 LP PH and you set iQ Analyzer 101 9 MODULES RESOLUTION Q the values from 50 to 125 iQ Analyzer will analyze the radii that equals frequencies from 500 LP PH to 1250 LP PH If you want iQ Analyzer to analyze the radii starting from the border of the stars set the first value to 0 Results calculated from Analysis Reduce to 8 segments iQ Analyzer calculates the MTF for 24 segments of each star If you select the checkbox the average of three segments will be written to the result txt file Equidistant Results If reduction is enabled the frequencies in the output are equidistant reduce result to __ freq The results are reduced to the specified number of frequencies It is useful for working with Excel spreadsheets Group Assign subcharts to groups which will be displayed in the graphical results Defualt groups Center TopBottom Left Right Corner can be edited to personal uses Expected formatting lt name gt lt number subchart 1 number subchart 2 number subchart x Note the numbers of the subchart need to be divided by a space or comma Siemens Center Image Size In the resolution module analyzing the modulated Siemens star
69. can choose between result representation of the particular image file file path is shown and representation of the average Average if Average Settings in the output properties is selected Dimensional unit The forth dropdown menu switches between different dimensions of the x axis You can choose between linepairs per picture height LP PH linepairs per pixel LP Pix linepairs per mm LP mm and pixel per inch PPI The information about resolution in PPI is obtained from EXIF data or the default value made in the settings Visual MTF The next dropdown menu enables switching between the representation of the original MTF SFR and the V MTF The visual MTF factors are defined in the three viewing condition sets General Settings Luma Chroma Channels The last dropdown enables you to switch between R G B and the luminance values Y 9 4 3 Numerical results The displayed numerical results vary depending on the selection made in the dropdown menus Note An exclamation point in the numerical results indicates that the frequency cannot be calculated and is set to Nyquist In the text output these frequencies are signed with a minus sign SIEMENS MTF SFR Siemens uses a Siemens star with a harmonic function The aim is to get a MTF modulation transfer function The MTF describes the loss of modulation depending on the spatial frequency fspatiai The numerical results contain information about the MTF for each segm
70. cessfully Otherwise all process steps are listed 6 1 2 RAW Info If the image to be processed is one without demosaicing Bayer Image or the output of dcraw is an image without demosaicing the image is further processed Interpolation Option to define if the image shall be demosaiced or not None The image is handled as an RGB G2 Image channel and given to the measurement modules Gradient Corrected linear f an interpolation algorithm is selected the image is demosaiced iQ Analyzer 28 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS RAW Q Bayer Pattern Define the Bayer Pattern of the sensor Each string represents the order of the red green and blue filtered pixels by describing the four pixels in the upper left corner of the image left to right top to bottom BitDepth Define the BithDepth of the RAW Data White Balance Multiplier The values are multiplier for each channel of the sensor data If this is different than 1 you can change the slope of the channel and therefore make a white balancing on the data To get this data you can run dcraw with the options i v to get informations about the file Note The data might be stored differently in the different raw files Most likely you have to normalize the data to the green channel White Balance Offset The dark current might be different for the different channels The offset is added to each channel the offset can be negative before the multiplier i
71. choose between displaying Numerical Results Visual Comparison Image vs Reference 3D Bars CIE xyY and CIE L a b The values of the warning scale can be defined in the Advanced Settings iQ Analyzer 93 9 MODULES COLOR Visual Comparison Numeric Results 3D Bars CIE xyY The color patches of the image square and the reference circle are displayed in the CIE xyY colorspace where x and y are the chromaticity coordinates and Y the luminance If the checkbox Spectral locus is enabled the CIE 1931 color space chromaticity diagram is also shown CIE L a b The color patches of the image square and the reference circle are displayed in the CIE L a b L is the luminance L 0 yields black and L 100 indicates diffuse white a describes the position between red magenta and green negative values indicate green while positive values indicate magenta b describes the position between yellow and blue b negative values indicate blue and positive values indicate yellow If the checkbox L a b gamut is enabled the L a b gamut is also shown Viewing Conditions The right dropdown menu enables switching between the three defined viewing condition sets iQ Analyzer 94 9 MODULES COLOR Q 9 3 3 Numerical results All values are reported for the whole chart All and for patch groups Color Neutral Skin which are defined in the cref file Examples of patch groups Col
72. cified in the settings VN weighted sum of standard deviations in CIE Luv dL delta L standard deviation in L du delta u standard deviation in u dv delta v standard devition in v Input referred results DR total The total dynamic range is given in f stops and density for new and old version of ISO 15739 ISO 15739 V2 actual version of ISO 15739 The ISO DSC digital still camera dynamic range is the ratio of the maximum unclipped luminance level to the minimum luminance level that can be reproduced with a signal to temporal noise ratio of at least 1 In order to avoid black level clipping problems the camera dynamic range is obtained by measuring the camera signal to iQ Analyzer 81 9 MODULES OECF Q noise ratio using a 2 0 density black reference The dynamic range is determined as the ratio between the saturation luminance level Lsa and the minimum luminance level Lmin L ISO DSC dynamicrange min The value for Lmin shal be calculated as O vial 2 0 incremental gain min O rorat Giu 2 0 is the black totall noise measured at density of 2 0 ISO 15739 V1 outdated version of ISO 15739 The given dynamic range is the difference of the luminance that leads to saturation and the luminance that leads to SNR of 1 or the threshold that is defined in the advanced settings Lsat Lsnr X X Threshold 1 SNR 1 or the value defined in the
73. ction and the resulting modulation data is normalized to the modulation of the white and the black patch surrounding the siemens star The benefit of this is that a potential sharpening undershood the black level is reduced due to sharpening is not clipped For the full contrast version of the Siemens star we could not find a huge difference between the MTF and the Normalized option while it can make a significant difference for low contrast siemens stars used to describe effects of noise reduction iQ Analyzer 11 3 INSTALLING iQ ANALYZER Q 3 INSTALLING iQ ANALYZER 3 1 SYSTEM REQUIREMENTS Windows 32bit and 64bit Mac 64bit only Windows XP Service Pack 3 Windows XP x64 Edition Service Pack 2 Windows Server 2003 R2 Service Pack 2 Windows Vista Service Pack 1 or 2 Operating Systems windows Server 2008 Service Pack 2 or R2 Mac OS X 10 7 4 Lion and Windows 7 newer Windows 8 Windows 8 1 Processors Any Intel or AMD x86 processor supporting All Intel based Macs with an SSE2 instruction set Intel Core 2 or later RAM 2048 MB 2048 MB 4096 MB recommended 4096 MB recommended Additional Hardware DeckLink Multibridge or Intensity products for Video Module by Blackmagic Design only Video input hardware supported by y MATLAB Not supported SSE2 was introduced into Intel chips with the Pentium 4 in 2001 and AMD processors in 2003 Most computers produced in the
74. ctivate if temporal noise also shall be calculated possible if you have captured a miniumum of eight continuous images The ROI position is not corrected for all image of the series to determin the temporal moise information Using this option requires to select Files in Queue Ext Ill 2 Lum Factor Set a factor for the calculation of luminance if you choose I 2 Lum for Luminance Data illumination factor The factor depends on the measurement setup and takes differences in the spherical illuminator and the measuring head into account The Ii 2 Lum Factor does not influence the results and dynamic range The Ill 2 Lum Factor is calculated by the formula LUMINANCE ILLUMINATION 10 Ill2LumFactor m With the aid of this factor the luminance for every patch will be calculated ILLUMINATION x LUMINANCE z Ill2LumFactor 10 ILLUMINATION illumination in the brightest patch D density of the brightest patch Limit Patch Size to To reduce calculation time you can limit the the size of the analyzed patches The default value is 100 pixel So 100x100 pixels will be evaluated in each patch L IEEE EJ O limit the paztch size patch size for analyze iQ Analyzer 75 9 MODULES OECF ISO Standard By using the dropdown menu you can select betwen the different versions of the ISO 15739 2003 and 2013 standard Switching TIITA between the versions changes the following options according to ISO
75. defines a range within the lens geometric distortion is acceptable It is displayed in the vs field view Vs fiels view and tolerance range iQ Analyzer 35 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS EXPORT IMPORT Q 6 4 EXPORT IMPORT In the Export Import menu settigs can be made for saving results and graphs re ed La Export Import tab 6 4 1 Data Results The results of all or individual modules if calculated are saved in one file in an iQ Analyzer internal file format Select the modules you like to store using the checkboxes and press Export Data A window opens where you can define folder and name of the myResults iea file You later can load the results to the iQ Analyzer again to use the graphical display options of the results and or to do further comparisons Select the modules by using the checkboxes and press Import Data A window opens where you can navigate to your file and open it 6 4 2 Export Graphics Result graphs can be saved either individually in every module by using the Export button or the graphs can be collected first and then exported altogether using the Graphics menu To add a graph to the list right click on it and press Add to list Now the graph appears as record in the list Graphs of all modules can be combined in the list iQ Analyzer 36 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS EXPORT IMPORT Marked grap
76. download sources html ExifTool Copyright 2003 2010 by Phil Harvey iQ Analyzer is distributed with the stand alone Windows executable of ExifTool This is free software To install ExifTool on Mac OS X please follow the instructions on the ExifTool homepage http www sno phy queensu ca phil exiftool You can download the complete source code here http www sno phy queensu ca phil exiftool dcraw Copyright 1997 2010 by Dave Coffin iQ Analyzer is distributed with custom builds of dcraw for Windows and Mac OS X This is free software You can download the complete source code here http www cybercom net dcoffin dcraw Ghostscript Copyright 2014 Artifex Software Inc iQ Analyzer 14 3 INSTALLING iQ ANALYZER Q iQ Analyzer is distributed with a Windows stand alone excecutable of Ghostscript for Windows This is free software Ghostscript is licensed under GNU Affero GPL license You can download the complete source code here http www ghostscript com iQ Analyzer 15 3 INSTALLING iQ ANALYZER Q 3 6 NETWORK SITE LICENSE for WINDOWS only 3 6 1 Overview The network site license allows you to use iQ Analyzer on a defined number of computers in a network using only one dongle The management of the simultaneously running versions of iQ Analyzer is performed with the help of user slots in a server file generated by the MxNet server program by TechnoData Interware GmbH Netw
77. e g 0 4 0 5 0 7 you can choose 0 4 0 8 LayoutFile is default and describes the size of the reference Layout File Setting those limits reduces calculation time File Type Image File Depending on the imported image file the file type is indicated in the Vies RAW File dropdown menu Image File image file RAW File unprocessed demosaiced file delivered for example by consumer cameras Bayer File undemosaiced image data with Bayer pattern Binary file binary file Color Space For color calculations RGB values are converted to XYZ Select a profile that is used for conversion Aperture Aperture according to camera information Time s Exposure time of the image ISO Speed The ISO speed is calculated by inserting values for Aperture Image properties and Object Distance m Setup and pressing the enter key Focal length Focal length according to camera information Aperture effective If Aperture Image properties and Object Distance Setup is available the effective aperture is calculated Insert data and press enter key Exposure Bias Information about exposure compensation iQ Analyzer 31 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS META Q 6 2 3 Setup Contains information about laboratory setup and staff Illumination lux Insert information about the intensity of the illumination optional Object Distance m The distance to the obj
78. e of the user slot in the server file as this would otherwise remain occupied ACTIVE USERS This field is continuously updated and shows the total number of active users for the selected application The Active Users button allows you to display a detailed list of the active users A user entry can be manually removed from this list If your application is terminated abnormally on any terminal you can either remove the user slot from the list or wait for the time out When the user time out is reached the user slot is automatically removed the next time the server file is refreshed iQ Analyzer 47 3 INSTALLING iQ ANALYZER Q It is not necessary to delete the user slot before the abnormally terminated application is restarted The existing user slot will be found and refreshed automatically Important It is very important that the system time of the PC is synchronized in the network Otherwise the User TimeOut can not be correctly computed The maximum allowed deviation of the system time between clients and server may not exceed the number of minutes which was selected in the MxNet server program in Refresh Time The following command can be used to synchronize the system time of the clients with the system time of the server This command can be implemented in the boot up procedure of each client to make it an automatic function NET TIME lt computername gt SET YES 3 6 4 iQ Analyzer After installing and ru
79. e several different settings files if the difference between these files is just one or Slightly more entries Example for a full call j21 gt iqa5 _G 21 exe cmd c IE Sample oecf26 4 1 5 Output iQ Analyzer CommandLine Version 5 2 16 build 066 Start Locate Chart s Locate ROIs Correct ROIs Analyze Calculate Results c IE Sample oecf20 JPG Background of Chart is rendered to an Output Level of 74 2 This is out of the ISO15739 V2 specification Check Exposure Write Results Done iQ Analyzer 21 5 GRAPHICAL USER INTERFACE HOME SCREEN Q 5 GRAPHICAL USER INTERFACE This chapter gives you a brief introduction about the structure of the user interface Run iQ AnalyzerV6exe iQ AnalyzerV6 app It takes a while until the MCR MatLab component runtime starts and the iQ Analyzer Home appears 5 1 HOME SCREEN Q iQ ANALYZER Q iQ Analyzer HOME iQ Analyzer Home screen 5 1 1 Main functions The main functions in top of the screen enable navigating to the different functions and modules Input functions Modules Lock Requirements Import Export General Settings Version Build RAW and Meta are only available using the administrator mode The dropdown menu is available after the analysis to switch between the modules and watch the results Choose between Home OECF Color Resolution Shading Distortion Histogram Measurement 42 MICA or U
80. ect ROI crop image and the anlysing process starts iQ Analyzer 130 9 MODULES DISTORTION Q 9 6 3 Graphical results The left dropdown menu below the diagrams in the Result View allows you to select the graphical presentation of the results Grid comp CA longitudinal CA GR vs image height CA GB vs image height CA Quiver by using the dropdown menus you can select an image file and choose the displayed result Grid comp The illustration visualizes the distortion in the image Each dot represents a cross in the real image The black grid represents the original image X and Y are height and width of the image in pixel The geometric distortion is plotted as a function of radial distance from the center of the image versus the lens geometric for each grid point Grid org The illustration visualizes the distortion in the image with the aid of a distorted grid X and Y are height and width of the image in pixel The geometric distrotion is plotted as a function of radial distance from the center of the image versus the lens geometric for each grid point iQ Analyzer 131 9 MODULES DISTORTION 2D Distortion is shown in 2D view Lens geometric distortion is visualized with colors The warning level can be adjusted in teh Advanced Settings Each patch represents a cross in the image Quiver Distortion is displayed by vectors The vector direction indicates the direction of distortion Each dot repre
81. ect is required to calculate ISO speed and the effective aperture Laboratory Optional information about the executing laboratory Operator Optional information about the executing operator 6 2 4 Notes You can insert your notes which are also displayed in the result text file Apply changes to all files in list If the checkbox is marked the meta settings are applied to all files in the active module iQ Analyzer 32 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS REQUIREMENTS Q 6 3 REQUIREMENTS In the Requirements menu you can define limits or ranges for different values This feature facilitates an immediately assessment if a result is in or out of your tolerances The requirements will be displayed in the numerical results as red yellow and green values and in suitable graphica presentations e iIS amp Requirements tab Open the Requirements menu by clicking on the toggle button in the top left corner Activate the checkbox es for one or more module Then adjust the limits to your needs Note Active requirements will be included when saving settings 6 3 1 OECF DR min f stop minimum dynamic range graphical presentation see logarithmic OECF plots gamma value aimed gamma function graphical presentation see linear OECF plots gamma tolerance tolerance for the required gamma function graphical presentation see linear OECF plots SNR min minimum SNR value vn
82. ed the ISO speed is calculated on the light intensity that is needed to reach saturation noise based ISO speed the ISO speed is calculated on the light intensity that is needed to reach a signal to noise ratio of 10 first acceptable noise based ISO speed the ISO speed is calculated on the light intensity that is needed to reach a signal to noise ratio of 40 first excellent Note To get reliable results form the ISO speed measurement you should make sure that the Luminance Data is set correctly we strongly recommend to measure the luminance on each patch directly so to specify a myLuminances lum file rather than a myDensities den file and the illumination Under some circumstances the effective aperature can differ significantely from the numerical aperature so make sure that you have specified the focal lenght and the object distance in the META module 9 2 4 Available OECF Charts These chart layouts are provided as default with the iQ Analyzer version 6 Other designs and custom made chart layouts could be added on request For a detailed describtion of the charts including numering of subcharts an ROls please see chapter Charts TE42 Forty Two Multi purpose test chart for high speed camera testing iQ Analyzer 83 9 MODULES OECF TE165 Logarithmic Gray Scale Test Chart 11 steps Noise Measurement Test Chart ISO 15739 TE219 594 80 1 160 1 1 000 1 HDTV Logarithmic G
83. ent or summarized as different averages stars and groups Note In the table you find the limiting resolutions of each star the limiting value can be set in the advanced settings for SFR Siemens iQ Analyzer 113 9 MODULES RESOLUTION Q MTF10 25 50 The limiting modulations for which the resolution in LP PH line pair per picture hight LP Px line pair per pixel and PPI pixel per inch is shown default 10 25 and 50 can be specified in the advanced menu MTF The percentual value describes the acual area beyond the curve in comparison to the ideal area vMTF Set 1 3 Similar to the visual noise which quantifies how well a human observer can recognize noise the visual MTF implicates the three defined viewing condition sets The calculated and the ideal MTF are multiplied with the contrast sensitivity function CSF which depends on the viewing condition sets for visual noise The two integrals are devided Multiplied with 100 you get the visual MTF vMTF in percent calculated MTF ideal MTF Y v calculated MTF CFS set x ideal MTF CFS set x Y v integral real integral ideal N e 100 integral real integral ideal vMTF EDGE SFR The SFR measurement is done on edges with different modulations e g TE253 between 100 to 40 The assumption is that the denoising algorithms have to detect edges to distinguish between information and noise in the image signal Using the different modulatons
84. erage Individuel By using the dropdown menu you can switch between the results of these files View By pressing the View button in the lower right corner of the Image View the actual image representation opens in a new window and enables viewing the file content e g zooming in out This representation is used for visual analysis and should be reviewed at 100 View button editing window and the image in a new window RESULT VIEW Result View By pressing the Result button the numerical results are displayed in the right screen using different diagrams iQ Analyzer 52 7 ANALYZING PROCESS AND RESULTS Q The Result View offers depending on module dropdown menues beyond the diagrams to adjust the graphical presentation A detailed describtion of the views in this menues is contained in the section of each module Also depending on available graphical presentations you find some buttons in the bottom right corner of the results view which enables you to do some further adjustmens Undock The graphical result is displayed in a new window You can undock multiple graphs from different or the same module The undocked windows could be scaled undocked window Export Opens the undocked graph an export setting window Enter file name and press Export OK to exports the actual graph The file format you can set in the Settings undocked window and s
85. esults A etting 9 9 2 Graphical presentatioi 9 9 8 Numerical results 9 9 4 TE42 chart 9 10 UTT aici 9 10 1 Settings 9 10 2 Numerical results and graphical presentation 9 10 3 Available UTT charts 10 CHARTS USED FOR IQ ANALYZER 10 1 a 10 2 TE42 FORTY Two MULTI PURPOSE CHART FOR HIGH SPEED CAMERA TESTING 10 3 TE106 COLOR BAR TEST CHART 10 4 TE165 LoG GRAY SCALE TEST CHART 11 STEPS 10 5 TE169 EBU CAM TEST CHART EBU TECH 3237 10 6 TE188 COLOR RENDITION CHART X RITE COLORCHECKER 10 7 TE219 NOISE MEASUREMENT TEST CHART ISO 15739 10 8 TE223 HDTV Loc GRAY SCALE TEST CHART 13 STEPS 10 9 TE226 HDTV COLOR RENDITION TEST CHART 10 10 TE230 X RiTE COLOR CHECKER SG 10 11 TE240 ISO 21550 SCANNER DYNAMIC RANGE CHART 10 12 TE241 OECF NOISE CHART WITH 20 GRAY PATCHES ISO 14524 ISO 15739 174 10 13 TE251 DISTORTION AND CHROMATIC ABERRATION CROSSES 10 14 TE253 MODULATED SINUSOIDAL SIEMENS STAR SINGLE STAR 9X 175 10 15 TE255 FLAT FIELD teet eren eoe 10 16 TE258 IT8 SCANNER CHARACTERIZATION CHART 10 17 TE259 OECF NOISE CHART WITH 20 GRAY PATCHES 10 18 TE260 Dor CHART 10 19 TE261 SLANTED EDGES 10 20 TE262 UNIVERSAL TEST TARGET UTT 10 21 TE264 OECF 20 CHART ISO 14524 15739 10 22 TE268 LENS RESOLUTION TEST CHART 10 23 TE269 OECF 36 CHART ISO 14524 15739 11 COPYRI
86. export the results as iea file by using the Export Import menu Import the saved shading data and resolution is calculated with shading correction Export Import menu save shading results Select shading data After starting the Analysis a window appears that shows the files of the resolution file list with information about fstop k and focal length f Use the dropdown selection on the right of each file to match the resolution file with its corresponding shading file and press Proceed iQ Analyzer 405 9 MODULES RESOLUTION SubChart Select the subcharts noise patch you would like to analyze If All is enabled all possible noise patches are part of calculation For declaration of the subcharts see chapter IV TE253 TE253 9x Linearisation Most cameras for photography use have a non linear response to luminance in the scene This is called gamma function and tries to adjust the image to the human eyes reception of light To analyze an image this function should be inverted also called the image shall be linearized This is done by reading the gray patches in the chart creating an OECF Opto Electronic Conversion Function and inverting this function Gray Patches MetaData Type poly fit Lin Source Other Structure None deactivates linearisation for calculation Other uses set of gray patches in the structure specified in Other Structure Linea
87. find the limiting resolutions of each group the limiting value can be set in the Advanced Settings for SFR Siemens The red dashed vertical line indicates the Nyquist frequency The red dashed horizontal line indicates the modulation which is specified as limiting resoution in the Advanced Settings Edge SFR All This plot shows the MTF of each edge with the different modulations e g for TE253 NoiseLab left and right edges with modulations of 100 80 60 40 Edge SFR All Edge SFR Mean Edge LP Pix iQ Analyzer 109 9 MODULES RESOLUTION Q Edge SFR Mean Edge Edge SFR Mean Sub This is a more compact illustration of the SFR Edge iQ Analyzer calculates the average of all edges with the same name over subchart E g for TE253 NoiseLab iQ Analyzer calculates each the average of the left and the right edges with same modulation Mod100 mean edges left 100 edges right 100 Mod 80 mean edges left 80 edges right 80 Mod 60 mean edges left 60 edges right 60 Mod 40 mean edges left 40 edges right 40 The modulation of these four averages are shown In the table you find the limiting resolutions of mean edges left and right the limiting value can be set in the Advanced Settings for SFR Siemens This is a more compact illustration of the SFR Edge iQ Analyzer calculates the average of all edges in one subchart E g for TE253 NoiseLab iQ Analyzer calculates each the average of
88. frequency that shall be reported in unit LP pix default 0 6 Nyquist frequency 0 5 iQ Analyzer 103 9 MODULES RESOLUTION Q Frequencies Number of frequencies in the output default 100 Profile Size Number of points to describe the edge profile Size in pixel is the quotient of Profile Size and OversamplingFactor default 40 5 pixel around edge Limit Frequencies derived from the SFR data based on these modulation E g 50 equals a MTF50 value the modulation is 50 at this frequency Default is 10 25 50 so three values are calculated MTF10 MTF25 and MTF50 LineFit One important step of the algorithm is to fit a line along the edge This can be a straight line linear ISO 12233 standard or a bended line polynomial The aim is to reduce the fit error which is shown in the numerical results Linearisation Most cameras for photography use have a non linear response to luminance in the scene This is called gamma function and tries to adjust the image to the human eyes reception of light To analyze an image this function should be inverted also called the image shall be linearized This is done by reading the gray patches in the chart creating an OECF Opto Electronic Conversion Function and inverting this function Gray Patches Local use the corresponding gray patches in each subchart default Global use one set of gray patches for complete imgae define the set in
89. frequency response resulting from analysis of an edge Noise Patch the four noise patches gaussian noise o 1 4 o 1 8 o 1 16 o 1 2 are analyzed to get information about texture reproduction Ye analysis only on luminance values Y RGB analysis on luminance and RGB values Single Chart If you want to anaylze single charts e g TE253_single chart or QA 62_SFR_single chart and insert a complete chart with all subcharts you can define the size of the subchart related to the image height The smaller the range the faster the detection iQ Analyzer o8 9 MODULES RESOLUTION Q E g the subchart has a height of 300 pixel in an image of 1280x960 pixel The scale is 0 3125 so select 0 2 0 5 If you do not want to specify the scale or want to use different images as batch processing with different scales you can set it to 0 2 1 or LayoutFile Enable Centered if the subchart you want to analyse is in the image center If enabled the search region can be reduced which speeds up the detection process if the detection is set to Automatic Mode 05 1 If disabled the software tries to locate a chart with the specified height in the entire image ADVANCED SETTINGS SFR SIEMENS The advanced settings change depending on the selection of the test pattern in the dropdown menu If two or more patterns shall be analyzed you have to go through all used pattern settings SFR Siemens SFR Edg Noise P
90. ge file The file format is defined in the General Settings Export Export button the undocked window and saving options Add to list With a right click at the graph you can choose Add to list The actual view is Undock now added to a list which can exported afterwards Examin and export the complete list in the mport Export menu see chapter Import Export Save Add to List iQ Analyzer 56 7 ANALYZING PROCESS AND RESULTS 7 2 4 Numerical results At the right of the graphs the tables can be displayed They contain the EXIF data of the selected image and the numeric results EXIF exchangeable image file format data This table is equal in each module It shows a selection of the EXIF data which is contained in the image file The complete available EXIF data can be observed in the Meta menu Numerical Results The second table contains all module specific results It changes depending on the module A detailed description of the specific results is contained in the description of each module 7 2 5 Export numerical results There are different possibilities to export the results of the iQ Analyzer All the adjustment about format and target folder is contained in the General Settings Output and PDF Export txt XML Select between text file and XML file Since the version 6 of the iQ Analyzer the output as XML file is electable ps pdf Use the new option of exporting results gr
91. he Settings Noise diplayed as Standard Deviation The Standard Deviation is defined as the square root of the absolute value of the sum of variances from the signal region Presentaion of luminance L and chrominance saturation C defined in the CIE LCH color space The colorspace is in the form of a sphere with the three axes L C and H hue colortone The L axis is vertical from 0 which has no lightness at the bottom through 50 in the middle to 100 which has maximum lightness at the top The C axis ranges from 0 at the center of the circle which is completely unsaturated i e a neutral gray black or white to 100 at the edge of the circle for maximum chroma or saturation By using the second drop down menu you can choose between result representation of the particular image file selected image in the file list at the left and one of the related files or the representation of the average only if you have set the processing and output options to Files in Queue Extension Average The third dropdown menu contains a selection of components that shall be displayed in the graph color components RGB the luminance Y or RGBY The fourth dropdown menu allows choosing the representation depending on luminance density exposure reflectance The further menus are depending on the previous ones iQ Analyzer 9 MODULES OECF Q 9 2 3 Numerical results Noise SNR is defined as the ra
92. he complete source code used to build FFmpeg here http ffmpeg arrozcru org autobuilds VLC Copyright 1996 2010 by the VideoLAN Team http www videolan org vic iQ Analyzer is distributed with a Windows installer of VLC Player Please make sure the ActiveX plugin is installed in order to use the Video Module with video files VLC media player is licensed under GNU GPL http www gnu org licenses gpl txt You can download the complete source code here http www videolan org vlc download sources html ExifTool Copyright 2003 2010 by Phil Harvey http www sno phy queensu ca phil exiftool iQ Analyzer is distributed with the stand alone Windows executable of ExifTool This is free software To install ExifTool on Mac OS X please follow the instructions on the ExifTool homepage You can download the complete source code here dcraw Copyright 1997 2010 by Dave Coffin http www cybercom net dcoffin dcraw iQ Analyzer 184 11 COPYRIGHT AND TRADEMARKS Q iQ Analyzer is distributed with custom builds of dcraw for Windows and Mac OS X This is free software You can download the complete source code here Copyright Image Engineering GmbH amp Co KG 2011 THE SOFTWARE FURNISHED UNDER THIS AGREEMENT IS PROVIDED ON AN AS IS BASIS WITHOUT ANY WARRANTIES OR REPRESENTATIONS EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PUR
93. he inserted notes are also written into the IPCT tag iQ Analyzer 154 9 MODULES UTT Q 9 10 2 Numerical results and graphical presentation In the Result View you can choose the presentation of the results by using the dropdown menu at the bottom left The second dropdown menu make this overview available for all tiles Average or for each tile seperated Tile 1 Tile 2 In most of the Result Views a third dropdown menu enables you to switch between the results for the top bottom left or right gray scale Overview The UTT Modul displays an overview after calculation is finished This overview contains a classification of the analyzed parameters Tonal Reproduction Noise Color Resolution Shading Distortion Lines due to the used specifications which define the tolerances The values are outside the tolerance that are specified in the selcted specifications Artwork Unique Library Non Unique Library The values are within the selected tolerances iQ Analyzer 155 9 MODULES UTT Q Numerical Background information concerning Lab LCH Delta E Delta L Delta C Delta H If you express the Lab color space in polar coordinates you get LCH where L is the luminance C the chrominance saturation and H the hue color tone Delta E indicates the overall difference between reference and sample The calculation method is defined in the specifications To get more detailed
94. hest spatial frequency with a modulation greater than 50 If the limiting frequency at 10 modulation equals Nyquist frequency sampling efficiency ist 100 The absolute comparison is shown in the lower center diagram The sampling rate is specified in the meta information of the file Most likely the sampling rate is set in the control software ppi and the related Ip mm If it can not be obtained the default setting will be used instead It can be changed in the settings tab The sampling rate measured on the image using the average distance of the black lines in the background The obtained sampling rate x sampling efficiency usable sampling rate Shading describes the lost of intensity Using the dropdown menu you can switch between reprensentation grid and lines Grid The shading measurement is done inside the green marked rectangle displayed in the Image View The AL values are shown for the right left upper and lower border of the rectangle respectively for the white and gray patches Each measuring point is one white respectively one gray patch within the rectangle iQ Analyzer 164 9 MODULES UTT Q Shading grid Lines The shading measurement is done on the white and gray lines at the uper horizontal and left vertical border 50 measuring points uniformly distributed over the lines Shading lines iQ Analyzer 165 9 MODULES UTT Q Distortion The distortion me
95. hical results are some dropdown menus settings in the left screen results and dropdown menus in the right screen Specific parameters The left one allows switching between the result plots Available files By using the third drop down menu you can choose between result representation of the particular image file file path is shown and representation of the average Average if you have selected Average in the output properties below the file list on the left side Plot selection The right dropdown menu switches between 3 D Contour plot 2 D and Plot When Plot is selected field means the picture height and the fourth degree polynomial describes the curve All iQ Analyzer 124 9 MODULES SHADING Contour 3 D Plot 9 5 3 Numerical results The numerical results are shown in the right table and exportet as text file or other as adjusted in the settings Luminance Shading f stop the maximum shading of luminance in f stops Shading 96 the maximum shading of luminance as percentage CIE A L the absolute average shading of luminace CIE L AL Lus I Ly percentiles DV by inserting values for percentiles in the Advanced mnenu you get information about the luminance distribution explained in digital Values DV and f stops depending on the choosen normalization percentiles f stop by inserting values for percentiles in the Advanced mnenu you get information abo
96. hs are deleted by using the button and the complete list by using the C button Save List plotsets The actual list could be saved using the button Name the myExports plotset file individually and click Ok The actual list is now contained in the dropdown menu eels Col Filename plotset new mm VBD This list of plotset could be activated later on and all included plots are saved from the actual calculation Export By using the Export button the graphs are saved File path and file format are defined in the general settings output Export after each analysis The checkbox Export after each analysis enables a function which automatically export the graphical results according to the myExports plotset when an analysis is finished iQ Analyzer 37 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Q 6 5 GENERAL SETTINGS In the general settings menu all important parameters regarding visual noise output and general parameters such as file path to reference data can be adjusted i e gt i 9 ES General Settings tab eat eng GENERAL SETTINGS overview 6 5 1 Output The iQ Analyzer since version 6 is able to export PDF files as well Required for this feature is the installation of ghostscript interpreter for the PostScript language and for PDF The software is contained in the 3rd party folder of the iQ Analyzer s
97. ial frequency in linepairs mm with a modulation greater than 5096 Minimum tolerance limit defined in the specifications The calculated modulation of the sample Maximum tolerance limit defined in the specifications due to sharpening during the digitalization of the image values could be greater than 1 Difference between the horizontal and vertical resolution Maximum tolerance limit defined in the specifications iQ Analyzer 158 9 MODULES UTT Q MisReg px is On the four slanted edges the maximal shift of the color channels is measured shift of the red an green channel and shift of the blue and green channel MisReg px spec_Max Maximum tolerance limit defined in the specifications Claimed Sampling Rate sampling rate specified in the meta information of the file Most likely the sampling rate is set in the control software ppi and the related Ip mm If it can not be obtained the default setting will be used instead It can be changed in the SETTINGS tab Obtained Sampling Rate sampling rate measured on the image using the average distance of the black lines in the background Resolved Elements obtained sampling rate x sampling efficiency usable sampling rate Tonal Reproduction The graph displays the tonal reproduction of the gray scales luminance of the reference specification vs luminance of the sample The four gray scales can be selected by using the dropdown menu Tonal Reproduction Full
98. ies of these four averages are shown In the table you find the edge width iQ Analyzer 111 9 MODULES RESOLUTION Q Noise Spectrum This plot shows the MTF of the different noise patches In the table you find the limiting resolution of each noise patch the limiting value can be set in the Advanced Settings for SFR Siemens Noise Spectrum All Noise Spectrum Mean Noise Histogram All This illustration shows the derivative of the four different noise patches on every side left top 1 4 left top 1 8 left bottom 1 16 left bottom 1 2 right top 1 4 right top 1 8 right bottom 1 16 right bottom 1 2 Noise Histrogram All Noise Histrogram Mean Noise Histogram Mean This is a more compact illustration of the noise histogramm iQ Analyzer calculates each the average of the left and the right edges with same noise OECF SFR Siemens The image data needs to be linearized before calculation This is controlled by the advanced settings in the linearisation box In extreme cases very strong vignetting very large geometric disotriton fisheye or very strong noise the measured OECF for the linearisation might be influenced The graph shows the measured OECF as used for calculating needed linearisation OECF SFR Siemens LUT The graph shows the calculated look up table LUT as used for the linearisation iQ Analyzer 112 9 MODULES RESOLUTION Q Available files By using the third drop down menu you
99. ight grayscale patch is equal in density to the background of the rotated square 0 50 density The lower left grayscale patch is equal in density to the center rotated square 1 10 density Numbering of gray patches and naming of the four slanted edges SCANNER SFR amp OEC 2 20 19 18 17 16 I5 14 13 12 EE SCANNER SFR amp OEC 2 iQ Analyzer 168 10 CHARTS USED FOR iQ ANALYZER Q 10 2 TE42 Forty Two Multi purpose chart for high speed camera testing This chart contains everything you need to measure the OECF dynamic range contrast limited to 1000 1 color reproduction quality white balance noise resolution shading distortion kurtosis ROls used for the analysis with the iQ Analyzer The TE42 contains different structures 1 The circular gray scale with 20 patches is used to determine the opto electronic conversion function OECF The patches are analyzed for all three color channels red green and blue in color images There i are three significant characteristic values derived from the OECF SNR Visual Noise and Dynamic Range Additionally each patch has a gray edge with increased decreased density The black and white patch below the circle are the minimum and maximum printable densities iQ Analyzer 169 10 CHARTS USED FOR iQ ANALYZER Q 2 Resolution is measured in the center and the image corners using sinusoidal Siemens stars There are 5 stars
100. illumination e g scanner The OECF analysis is calculated directly with density In the graphical results the OECF ist displayed depending on luminance log luminance B 41 OECF20 i and density TE218 OECFI2 den TE240_18021550 den TE2 CF20 den Patch Densities choose the density file of the choosen chart e g TE241_OECF20 den In the Advanced Settings see below you can create own density files import existing ones make changes according to the datasheet which is delivered with the Luminance and Density Data by using the button in the Advanced Settings you can create your own density files and or edit existing testchart and save them ones Note Take care by using tele photometers e g Minolta LS In dark patches the measured luminaces can differ because of stray light in lenses ADVANCED SETTINGS By using the toggle button Advanced the advanced menu dis appears iQ Analyzer 74 9 MODULES OECF Q V N Ignore for Mean This option is used for average calculation of the visual noise VN It could happen that more than one field is in full saturation To reduce the influence of fields in full saturation corresponds to VN equal zero you can set the amount of fields that are ignored for calculation First Last the first and the last field will be ignored First2 Last2 the two first and two last field will be ignored None all fields are taken into account Measure temporal noise A
101. information about the difference it is interesting to see the difference in Luminance Delta L and hue Delta H Neutrals The results are displayed for the 20 gray patches of the gray scales Using the dropdown menu you can switch between the four gray scales top bottom left right Values outside the tolerance range are indicated red L ref Luminance of the reference specifications L sample Luminance of the image delta L is Calculated luminance difference L sample L ref delta L spec_Max Tolerance limit defined in the specifications delta E is Calculated color difference delta E spec_Max Tolerance limit defined in the specifications delta C is Calculated chrominance difference C ref C sample delta C spec_Max Tolerance limit defined in the specifications GainModulation is_L Sample AL Reference AL x 100 iQ Analyzer 156 9 MODULES UTT Q GainModulation is E Sample AE Reference AE x 100 GainMod spec Max Maximum tolerance limit defined in the specifications GainMod spec Min Minimum tolerance limit defined in the specifications STD is Calculated standard deviation of each patch STD spec Max The standard deviation is not relevant for the specifications Example for Gain Modulation Sample L a b values of the horizintal lower gray patches number 1 and number 2 of the UTT UTT L a b Delta L Delta E Gray patch 1 92 59 0 88 0 12 Gray patch 2 89 82 0 74 0 82 2 77 2 93 Reference L a
102. ing with the aid of the contrast sensitivity function the CSFs describes the contrast which is required for identifying defined frequencies the Luv color space is better suited for viewing smaller field than the Lab color space weighted standard deviat in the Luv the standard deviation is calculated for every patch and weighted with the aid of the formula 1 000L 0 8520u 0 3230v iQ Analyzer 45 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS The flow chart above shows that for calculation of visual noise the RGB image data has to be converted into the CIE input can be specified in the Meta data see on the right F The specifications in the visual noise settings refer to Adobe RGB ECIRGB V2 different modules OECF Color and Shading NN Ernbedded Profile Selected Profile XYZ space as one of several steps The colorspace of the specify the colorspace in the Meta data White point Specify the white point that should be used to calculate the visual noise ice Use the icc standard white point D50 The color managment specified by the ICC is based on this white point Profile Use the white point specified in the profile header illuminant White point and viewing conditions setting Viewing conditions As the visual perception of noise depends on the viewing conditions you have to specify them Select an ies file for the visual noise calculation from the dropdown menu The edit
103. ing process the image is converted to the LCH colorspace luminace saturation hue iQ Analyzer 122 9 MODULES SHADING Q 1x1 and 11 x 11 matrix Luminace Boost Define the boost for displaying luminance Saturation Boost Define the boost for displaying saturation Luminace Boost 1x Luminace Boost 5x Saturation Boost 1x Saturation Boost 5x Colorbar Scale By inserting values for each representation you can scale the color bar right to the graphical results Limit fstop define the scale for the graphical representation of luminance shading in f stops Limit Y define the scale for the graphical representation of luminance shading Limit L define the scale for the graphical representation of luminance shading CIE L Limit C define the scale for the graphical representation of color shading CIE C scale for lumninace shading f stops iQ Analyzer 123 9 MODULES SHADING Q Limit GR define the scale for visualization of the difference between the green and red channel Limit E_ab define the scale for visualization of delta E_ab Limit GB define the scale for visualization of the difference between the green and blue channel Limit VN define the scale for visualization of the visual noise Limit SNR define the scale for visualization of the signal to noise ratio 9 5 2 Graphical presentation The graphical results are displayed in the right screen Below the grap
104. lack image is produced by blocking all light from reaching the sensor e g take an image in a total dark room or cover the White Image lens Gray Image Image produced by taking a picture from select the chart layout a gray surface White image Image produced by taking a picture of a white surface Substract Background To substract the backbround is more important for white and gray images than for black ones Pixel that are outside the expected tonal range shall be detected To avoid the influence of inhomogeneous illumination and shading the background can be subtracted from the image Therefore a 7 x 7 filter is used to calculate the background Defect Pixel show DV outside The threshold that is used to detect a pixel as defect can be set individually You can choose between Threshold and several values for 3 Sigma a 4Sigma the standard deviation Sigma 5Sioma 6 a Thresholds If you have substracted background insert values vor Mean and Mean values greater and less than the calculated mean value If you do not have subtracted background insert values for Min and Max iQ Analyzer 137 9 MODULES HISTOGRAM insert values for threshold depending on subtract background 3Sigma 99 7300204 4Sigma 99 993666 5 Sigma 99 99994267 6 Sigma 99 9999998027 Select ROI Enable the checkbox if you want to select the region of interest yourself After LEZ doing all
105. le in the file list The titel of each graph contains the file name The view can be changed by using the dropdown menus in the results view A change will be applied to all graphs Deactivate the multiview display by clicking again at the button Mark one graph by ta clicking at it box changes to blue and use the button to delete this graph or use the trash button to delet all iQ Analyzer 54 7 ANALYZING PROCESS AND RESULTS Q Use this option also to compare the results of different modules for device x MCI Use the button to open up to four graphs Mark one graph by clicking at it and then choose module file and view Repeat this for the other grpahs Note The multiview option separate graphs or combined in one graph must be deactivated SHOW RESULTS FROM CURRENT FILE LIST COMBINED IN ONE GRAPH IF POSSIBLE The second option merges multiple results of the listed image files in one graph iQ Analyzer 55 7 ANALYZING PROCESS AND RESULTS Q This option is not available for all views The button is deactivated when not available Views with enabled combined view option OECF Visual Noise Noise Resolution Siemens MTF Stars Groups Shading all plots Distortion vs field Chromatic aberration GR vs image height Chromatic aberration GB vs image height 7 2 3 Export graphical results Export The result is displayed in a new window and you can save it as an ima
106. list of settings all can be edited Please make sure that the file remains in its basic configuration so it s always variable value comment Note There is a tab before and after the If there is a problem with the settings you will receive a message like The value XXX for variable YYY is not a valid filepath Please check MYSET FILE A mySettings myset file is a configuration file that is written by the iQ Analyzer You can obtain that file by pressing the button Save current settings to file in the Settings We recommend to use a myset file as the configuration is easier to handle 4 1 3 lt Module gt A string that specifies the module you want to use That can be the full name or just the first character Example OECF or o 4 1 4 Options Options are always a pair of arguments setting and value setting this is the name of the variable that can be set in the settings See the EA set txt for the names iQ Analyzer 20 4 COMMAND LINE INTERFACE Q value the new value so this setting in the seting file is overwritten Example OECF Illumination 1000 So you have set the variable OECF lllumination to 1000 regardless what the setting in the specified setting file was You are not limited to a number of options to set The idea of the options is to make most settings in the settings file but still be able to make adjustments to it by each call That way you do not need to hav
107. ly used for scanners If no EXIF data exist this value is used in the Resolution module A warning appears after calculation modal EXIF Data does not provide all information needed for calculating the resolution in PPI Use default resolution see General Setling warning if not all EXIF data are available for calculation resolution in PPI resolution module Extension definition if not numerical Working with extensions is intended for image series If your extensions are not numerical you can specify them here Example You took three pictures named shading_w jpg shading_s jpg and shading_t jpg Define the extension W wide S standard and T tele in this menu The extensions have to be divided by a space define extension if not numerical iQ Analyzer 41 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS 6 5 3 General Hide Warnings show Errors only iQ Analyzer displays errors marked in red and warnings marked in yellow Bloc rama displayed error displayed warning These warnings e g if the exposure is not saturated can be turned on off by selecting the checkbox This can be helpful for users who want to analyze images out of the normal settings Choose language Choose between English Chinese and Japanese which is available since iQ Analyzer Version 6 enance warming define extension if not numerical 6 5 4 Settings amp S
108. mage is not taken properly but this could also be due to camera quality 7 2 RESULTS 7 2 1 Graphical presentation Image Result This toggle button changes view between the results and mage View Als long as the measurement has not been processed this toggle button switches between the emty results window and the original image After calculation the results view show the graphical presentation of the results and the Image View different check images Image and Result button Image View Result View iQ Analyzer 48 7 ANALYZING PROCESS AND RESULTS IMAGE VIEW YNEWO Analyzer TestblteruPGiolorte230 Image View The Image View offers several representations of the original image Below the graphical presentation there are two dropdown menus The left one allows switching between the result plots The available options change dependent on the actual module ROI The ROI image is the overlay of all ROls rectangles outlined in blue at the original image If you have doubts if the detection has worked right this facilitates you to have a fast display option in the OECF heck Image view check Original image OECF module ROI image OECF module iQ Analyzer 49 7 ANALYZING PROCESS AND RESULTS Original Waveform Y Waveform RGB Vectorscope Checklmage Original image resolution module ROI image resolution module An image named with
109. matic mode works satifactorily In cases of doubts about the correct detection of all ROIs the check image could be consulted easily Distortion module only After pressing the Start button you have to crop the image and then adjust the ROIs manually Depending on the chart layout in some modules you have to do only one of both steps Information about next step is displayed in the head line of the window Adjust rectangles by activating them when clicking at the border Move them and or adjust size Go on with every rectangle which have to be adjusted To commit a selection double click in the rectangels or use the right mouse button Crop Image The right mouse click offers some more functions It is applied to the rectangle you clicked into Copy position copy position to clipboard a Matlab feature not further used in the iQ Analyzer Set Color changes mark up color of the rectangles no influence on further calculation Fix aspect ratio aspect ratio of a rectangle preset or set by you stays Crop Image crops the image to the rectangle Cancel cancels operation closes window return to iQ Analyzer module Example l Select the OECF test pattern by drawing a rectangle around it aspect ratio 4 3 and double click on it or use the right mouse button Crop Image window for manual ROI detection iQ Analyzer 68 9 MODULES SETTINGS Pen rectangle around the TE241 aspect ratio
110. max mean Set a maximal and mean value for visual noise Dynamic range limit and gamma requirement tolerance iQ Analyzer 33 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS REQUIREMENTS 6 3 2 Color dE max mean Define a mean and a maximum value for the color difference AE The limits will be applied to the different groups of patches A value will become green if all groups are in the tolerances red if all groups are outside of the tolereances and yellow if some groups are inside and other outside of the tolerances dL max mean Define thresholds for differences in luminance dC max mean Define thresholds for differences in chrominance dH max mean Define thresholds for differences in hue 6 3 3 Resolution res limit min LP PH Define a minimum resolution for the resolution measurement using Siemens stars The limit is displayd in the numerical results for each star segment or group A gray line marks the limit in the MTF plot Resolution limit in the Siemens MTF stars view iQ Analyzer 34 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS REQUIREMENTS Q 6 3 4 Shading shading max f stops Set the maximal allowed shading in f stops Perfect good acceptable below Define more precise ranges using perfect good and acceptable below The ranges are displayed in the Chromaticity view as boxes Chromacity view 6 3 5 Distortion LGD worst fit max The worst fit
111. measure vignetting The TE255 is designed to measure shading vignetting of a digital use camera It is a very precise milk glass which is used in e combination with an integration sphere or a light box iQ Analyzer 177 10 CHARTS USED FOR iQ ANALYZER Q 10 16 TE258 IT8 Scanner Characterization Chart The TE258 is designed to characterise slide print scanners It is suitable to create color management profiles for scanners 10 17 TE259 OECF Noise Chart with 20 gray patches The TE259 is designed to check the dynamic range of broadcast cameras on a waveform monitor It contains a gray step wedge with 20 patches and a contrast range of 10 000 1 10 18 TE260 Dot Chart The dot chart consists of two different charts on the front Side and on the back side One of them has 31 lines of dots and the other 15 lines of dots They can be used to determine distortion and chromatic aberration vignetting The TE255 is designed to measure shading vignetting of a digital camera It is a very precise milk glass which is used in combination with an integration sphere or a light box iQ Analyzer 178 10 CHARTS USED FOR iQ ANALYZER Q 10 19 TE261 Slanted Edges This target has a tilted checkerboard in the background and five low contrast slanted edges together with surrounding gray patches in the front It is used to determine the SFR of digital capture devices and is our default chart in combinatio
112. n menu edit the display name of the setting optional and and select an icon optional Add field to Home screen At last press this button and the chart layout with the setting appears in the iQ Analyzer Home iQ Analyzer 44 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Q To add further settings to a chart layout select the chart layout do the adjustments of step 3 and click again at Add field to Home screen to complete the conjunction To delete a setting or a chart layout select the setting layout by clicking in the right list sss layout setting is marked up then delete it by clicking at the minus symbol m Note For using the myset files in the Home screen the filename must not beginn with numbers Please name myset files beginning with letters for example TE253 2014 myset 6 5 8 Visual Noise Unlike the ISO 15739 camera signal to noise ratio the visual noise is evaluated as an output referred noise Visual noise takes into account that the spatial distribution of noise could be different and considers that human observers react different on color and or intensity noise Visual noise quantifies how well a human observer can recognize the noise in the analyzed image With the aid of six transformation steps the visual noise of RGB images can be calculated RGB image opponent space based on analysis of color receptors of human eye and of processing the resulting color signals CSF frequency filter
113. n with the AF Box and STEVE The TE261 is composed of five subcharts Each of the subcharts composed of 20 graypatches and four slanted edges top bottom left right 17 19 20 18 10 20 TE262 Universal Test Target UTT The Universal Test Target is designed to evaluate the image quality of scanners and other digital input devices used to create the digital images of documents photos and other reflective media iQ Analyzer 179 10 CHARTS USED FOR iQ ANALYZER Structures of the UTT chart Lines L1 Resolution L1 Gray steps C1 cotor patches Ll Shading Distortion 10 21 TE264 OECF 20 Chart ISO 14524 15739 The former OECF chart contains 12 or 20 gray patches in a circular order and three different patterns in the center of the chart The actual version of the OECF chart skips the center patches due to the sometimes occurring straylight This chart is also offered as TE264X where the 20 gray patches are not rasterized as in the standard version of the chart but done with nearly no structure on a very fine grained film iQ Analyzer 180 10 CHARTS USED FOR iQ ANALYZER Q 10 22 TE268 Lens Resolution Test Chart The TE268 is designed for resolution and sharpness measurements 25 sinusoidal modulated Siemens stars 16 slanted edges at four different contrasts four colored dead leaves structures and rope structure images are placed on the chart A ver
114. nalyze calculated images again If you add new files to the list where are already analyzed images listed you can choose if you want to anaylze all images again more time consuming or just analyze the new images iQ Analyzer n 9 MODULES SETTINGS Q Processing Files in Queue all files added to the file list will be analyzed Files in Queue Ext Use Files in Queue Ext if you have made an image series You have to name the files with extensions e g colorchecker_01 colorchecker _02 colorchecker_03 and add the file with the lowest extension to the list The iQ Analyzer analyzes the further ones too If your extensions are not numerical specify them in the settings Output By using the dropdown menu below the file list you can configure the output properties Individual separate results for every image are v saved in the text file x Average Average the average results of the images and its following images are saved in the text T e Individual file only possible for Files in Queue Ext Average Individual the average and separate results are saved in one or multiple textfile depending on the output settings only possible for Files in Queue Ext Start Having done the setup up press the Start button and the analyzing process starts In the upper frame you see the progress bar Using the Stop breakes the analyzing Start process The numerical results and an image with marked
115. ne turns off the numerical results in the visual comparison mode Results Displays the numerical results with warning levels adjusted in the advanced settings of the viedeo module The drop down menu Display offers the same options like for comparison except none Visual comparison with and without numerical results iQ Analyzer 65 8 VIDEO Q numerical results 8 1 5 Pass stream to Measurement This function enables you to pass the actual stream to the measurement module Enable the Measure mode and klick at the Pass stream to Measurement module button The live stream is now available in the Measurement module Use the utilities of the Measurement module for live analysis Note If the Measurement module was not used since start of the software load the measurement module manually iQ Analyzer 66 9 MODULES SETTINGS 9 MODULES 9 1 SETTINGS 9 1 1 Settings The settings in each module offer module specific options and options which are repeated in every module This part of the manual deals just with the options that are available in every module except videomodule The module specific information is described in chapters 9 9 2 OECF to 9 9 10 UTT which approaches all details to the particular measurement Chart layout At the top of the settings in each module you have to select the chart layout file which is germane to your test image It TE219_OECF12 chart contains
116. nning MxNet server install iQ Analyzer on every computer where it should be used On each computer open the file pathToMxNetFile txt in the folder Setting in the iQ Analyzer directory and put the full path to the server file into the first line in the example above it was NetworkSharedFolder iQ Analyzer mx Save this file and start iQ Analyzer Important Make sure that the server file is accesible from each computer iQ Analyzer 18 4 COMMAND LINE INTERFACE Q 4 COMMAND LINE INTERFACE The iQ Analyzer offers two different interfaces to its capabilities The first one is the graphical user interface that will show up after you have started the iQ Analyzer see chapter 5 GRAPHICAL USER INTERFACE Additionally you can run the software using the command line interface This gives the possibility to integrate the iQ Analyzer in your own workflow You could even combine this with one of our USB controlled illumination devices so you can script your own test series that runs without user interaction To start the Ul you just double click Q AnalyzerV6 exe X stands for the current version number in the main folder of the software This exe is a link to the main executable which is called iqa6 exe If you want to have access to the command line interface just run this file adding the string cmd 4 1 SYNTAX If you just call the iQ Analyzer with the cmd flag you will get an output of the needed syntax to perf
117. nput functions RAW and Meta and the settings are also availble The workspace below is organized in four columns iQ Analyzer 25 5 GRAPHICAL USER INTERFACE STANDARD MODE MODULES Q Settings Advanced Settings Results Tables The left column contains general setting and the filelist This column can be hidden or displayed by clicking on the arrow Using the opertator mode all functions concerning image calculations are disabled On the right of the settings the advanced settings could be displayed and hidden only in administrator mode They contain more specified settings due to the calculation The most prominent column shows the graphical presentations of the results The view could be adjusted by the drop down menus at the bottom of this column At the right the forth column can be displayed which contains tables with the numerical results This column can also be displayed and hidden by the arrow button iQ Analyzer 26 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS RAW Q 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS The iQ Analyzer contains different modules to specify import settings and to adjust the analyses and output settings 6 1 RAW The iQ Analyzer supports RAW data for still image analysis based on dcraw mo ow oii meros dcraw command ine call 6 1 1 RAW Processing Default Processing Activates the default processing for raw images containing adjusments for all
118. nt if a result is in or out of your tolerances iQ Analyzer 8 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 Q MULTIVIEW DISPLAY The iQ Analyzer Version 6 offers a great new option to display the results Up to four results of one or different modules can be displayd side by side For some values there is also an option available that arranges multiple results of one module all together in one diagram This function offers you the possibility to get a comprehensive overview for example about all test that are done with one camera or a comparative overview of different cameras iQ Analyzer 9 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 Q MULTILANGUAGE The iQ Analyzer Version 6 offers additional languages Chinese and Japanese are superinduced to the english standard language VIDEO MODULE The iQ Analyzer Version 6 has enlarged real time functions pass a video stream to the Measurement module and benefit from all utilities which are available in this module GRAPHICAL USERINTERFACE The graphical userinterface in the iQ Analyzer Version 6 is more flexible and more neatly arranged The numerical results are now displayed at the right of the window in a new colum So they are displayed more clearly and scrolling is more comfortable Additional you now can copy and past results of the tables to pass a fast overview to someone else without dealing with the textfiles All the columns containing settings and numeric
119. o format are device dependent For video file sources please select Video File in the Hardware dropdown menu and refer to the section 8 1 1 1 of this documentation Multbridge Pro Labtec WebCam Pro Lumenera USB 2 0 Camera Video File General settings Hardware General settings Interface General settings Video Format iQ Analyzer 58 8 VIDEO Device Specific Properties Mosaspcncrepera at Donte riri Lo em amus io x device specific properties If the driver of your video input device e g framegrabber or web camera provides more detailed adjustments such as gain frame rate or sharpnesss you can set them in the Device Specific Properties window If no options are available the button will be inactive Please note that these settings are device and driver dependent Trigger In order to analyze the video data using the iQ Analyzer modules a number of frames has to be acquired The trigger section provides control over the acquisition Capture every Defines which frames should be captured Select 1 to acquire every frame 2 for every second frame etc Frames per trigger Defines the number of frames to be captured settings for number of on the next acquisition triggered by the Capture button The Trigger menu for video files differ also slightly from live video streams Please refere to section 1 2 of this chapter Capture Pressing the Capture button t
120. of the color differences in the Comparison Mode Setting Delta E warning level to 20 for example will mark the color patches in your test target red if they exhibit Delta E equal or greater than 20 The patches with Delta E smaller than 20 will be marked in the shades of yellow and green depending on their Delta E Program Location The iQ Analyzer is distributed with an automated FFmpeg 32 bit Windows build in order to extract frames out of a video file It is located in the 3rdParty folder of the iQ Analyzer If you want to use another version of FFmpeg you can select its program location using the button Color Comparison Selection if detecting the color patches in the comparison mode should work automated or manual For details please see 8 8 1 4 COMPARISON LIVE VIDEO SOURCES ONLY 8 1 4 Preview Measurement and Comparison mode Selecting one of the modes change the view in the preview window Please note that the measure and comparison modes are only available for the live video sources You can switch between the modes using the toggle buttons Preview Measure and Comparison PREVIEW The preview window shows the actual video and allows a visual evaluation Live video For the live video sources this helps you to easily set up your environment and adjust your camera s position and the scene lighting The field of view can be limited iQ Analyzer 61 8 VIDEO RO
121. oftware For more information concerning ghostscript see official webpage http www ghostscript com Export figures as Apart from the numerical results text and xml files the iQ Analyzer deliver the export of reports Select between the file format of exported figures PS PDF or PNG Include results If include Results amp meta data is selected the reports contain also the numerical results and the meta data output properties iQ Analyzer 38 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Q Q Report without and with numerical results and meta data Convert ps to pdf requires ghostscript Enable this function to receive an pdf file as output Then set the path to the folder containing the ghostscript interpreter Export Folder Selection of the folder in which numerical and graphical results are stored Same as File s figures are exported into the same folder as the original image files Select each time the export folder can be selected at each analysis Selected Folder selection of a standard export folder If Processing Files in Queue Ext In every module you can choose which files will be analyzed When Files in Queue Ext is selected you can define the number of result files that will be stored One File per Result for every image one file with numerical results is created output properties Multiple Results in one File one file with the results of all im
122. ondly add this layout to the iQ Analyzer Home by using the Manage Home function in the General Settings For details please refer to chapter Home SETTINGS FILES The iQ Analyzer Home offers a default settings for the available chart layouts and example images delivered with the iQ Analyzer software Please create individual settings according to your needs by doing all adjustmens in the concerned modules and store these settings using the function Settings amp Start Up in the General Settings menu Settings are stored as new_setting myset files in the default folder C Program Files lmage Engineering iQ Analyzer 6 0 0 Setting Now this new settings file is available when using the administrator mode To add it to the iQ Analyzer Home use the Manage Home function General Settings For details please refer to chapter 6 5 7 iQ Analyzer 24 5 GRAPHICAL USER INTERFACE STANDARD MODE MODULES Q MANAGE HOME The Manage Home settings are located in the General Settings menu Go to the General Settings and press the Manage Home button The preferences menu for arranging the iQ Anlayzer Home appears For details please refer to chapter Home 5 2 STANDARD MODE MODULES The main functions at the top of the window are consistent with the Home screen The Import Export menu and the General Settings menu are enabled when using the administrator mode Switching to any module except the Home screen the i
123. onfirm your action with Rename or Delete respectively Return to the CREF Data dialog pressing the Back navigation button iQ Analyzer 91 9 MODULES COLOR In order to use the Reference Data NEW DATA cref ColorChecker cref ColorCheckerSG cref ColorCheckerStudio cref edited created data they have to be saved into the folder which is defined in the settings Color Reference Data The local folder Data is set as default mylT8 cref dropdown menu with the new reference data After closing the editing window you can select your new reference data in the dropdown menu Write cref File from data Write cref File from Data If you want to match all cameras in your studio or if you want to describe objectively how a new image pipeline changed the colors You can make one camera or one setup to your master and compare how well another camera or other settings match these values First analyze the reference image White Point has set to Profile Masine Bias These make sure that the image data is not changed due to Torate a cie lon nage Data you reco se nage Wate Por chromatic adaptations Otherwise a warning dialog appears Pate Advanced Setia See doctmentation erhuthetrfoaton Then write cref file from data Press the button Write cref File from Data and a window pops up Make your settings and press OK You should save the file
124. ons of the MCR on the same machine is not supported on Mac OS X When you install a new MCR onto a target machine you must delete the old version of the MCR and install the new one You can only have one version of the MCR on the target machine To remove the MCR simply move the MCR folder from Applications to the trash The MCR is installed in Applications MATLAB Compiler Runtime Vxx where xx is the version of the installed MCR 2 Download the latest version of the iQ Analyzer from our server http www image engineering de downloads software 3 Start the installation by running the installer and follow the instructions You can store the software to any folder on your system on Mac OS X it must be the local Applications folder You need write permission for the iQ Analyzer folder and all of its subfolders Note for Mac OS X only The software will not start if it is not in the local Applications folder If you want to use it from another location e Open Automator e Drag and drop the iQ Analyzer app onto the Automator Icon e Modify the path in the script 4 Install additional open source software a Mac users have to manually install ExifTool by Phil Harvey The installation file is located in the 3rdParty folder of the iQ Analyzer Also ghostscript should be installed on the Mac to export PDF reports This needs to be installed separately PC users can omit this step b In order to analyze video files using
125. or edge Other Subchart Choose which subcharts of the selected patches Other Structure is used for linearization Example The four noise subcharts 1 2 3 4 uses the patches of edge subcharts for linearization Noise subchart 1 uses edge subchart 1 noise subchart 2 uses edge subchart 1 noise subchart 3 uses edge subchart 2 noise subchart 4 uses edge subchart 2 iQ Analyzer 107 9 MODULES RESOLUTION Q 9 4 2 Graphical presentation By pressing the Result button the results are displayed in the right screen The view could be changed using zhe options in the below gropdown menus Edge SFR Edge Profile Segments Noise Spectum Stars Noise Histogram _ Groups depending on the the diplayed result selected with the first dropdown menu the further menus offer different views Specific parameters By using the left dropdown menu below the illustration you can choose the displayed result according to the used sub charts depending on analyzed values selected in the settings Siemens MTF Edge SFR Edge Profile Noise Spectrum Noise Histogram Plot selection The second dropdown contains several presentations corresponding to the selected parameter Siemens MTF Overview Overview of the SFR calculation of the siemens stars The black circle represent the Nyquist frequency the white polygon the limiting resolution of each segment So the more the polygon covers the black circle the better The
126. or a side by side comparison Numerical evaluation of color distance can also be performed For more extensive numerical evaluation based on ISO and CIE standards just capture some frames and pass them on to the iQ Analyzer s Color Module Chart layout First define the chart layout from the dropdown menu Reference Select the according reference file from the second dropdown menu Detect Press Detect and the blue ROls regions of interest will appear at each color patch iQ Analyzer 64 8 VIDEO Create CREF The color data from the video stream can be saved and used as a reference file for other devices e g for matching cameras in a studio in many frames should be averaged environment Open the creation dialog pressing the Create CREF NUMEN button The saved reference file will appear in the Reference paean ox nen dropdown menu Press Detect button again in order to use it Preview Comparison Results For visual comparison Image vs Reference press the Comparison button For numerical results press the Results button Previev shows the actual video with marked ROIs Comparison Displays a visual comparison between the actual color patch and the reference color patch The dropdown menu Display allows changing the representation for the color difference Delta E color distance Delta L lightness C chroma saturation Delta h hue no
127. orChecker ColorChecker All ColorChecker Color ColorChecker Neutral mu IT8 All IT8 Color IT8 Neutral IT8 ColorChecker SG ColorChecker SG Ail ColorChecker SG Color ColorChecker SG Neutral ColorChecker SG CC CoorChecker ColorChecker SG Skin iQ Analyzer 95 9 MODULES COLOR Q The numerical results report the values for Delta E L C and H and the visual noise VN for the three viewing condition sets defined in the settings Delta E color distance 1 AE should be visible for a trained person Delta L luminance in polar coordinate color space LCH Delta C chrominace in polar coordinate color space LCH Delta H hue colortone in polar coordinate color space LCH VN Set 1 default distance to display 0 5 m fixed resolution of 96 dpi VN Set 2 default fixed picture height of 100 mm viewing distance calculated depending on image diagonal VN Set 3 fixed oicture height of 400 mm viewing distance calculated depending on image diagonal 9 3 4 Available color charts These chart layouts are provided as default with the iQ Analyzer Version 6 Other designs and custom made chart layouts could be added on request For a detailed describtion of the charts including numering of subcharts an ROls please see chapter 10 CHARTS USED FOR iQ ANALYZER TE42 Forty Two Multi purpose test chart for high speed camera testing TE106 Color Bar Test Chart Chart for
128. ork client accesses the server file MxNet Server with the dongle generates the server file Bl Network dient accesses the server file m Network client accesses 2 the server file MxNet functional principle is shown in the diagram above The server program running on a computer with the dongle generates an encoded server file Each running version of the iQ Analyzer connects with the server file and occupies a user slot that is being released when the application is closed The network protection via MxNet does not use network protocols and can thus be used in any network system 3 6 2 Installation Copy mxnet32 exe from the 3rdParty MxNet in the iQ Analyzer installation folder to the C Windows system directory on the computer that will act as the MxNet server Connect the dongle to this computer and run mxnet32 exe The MATRIX NET program is the MxNet server application and must run on the MxNet server PC computer with the dongle This application generates and refreshes the MxNet server file The MxNet server program can also be registered as a Windows service so that the program is started automatically during the boot up of Windows The advantage of a service over an Autostart entry is that the service is also started if there is no User Login in Windows You can directly register MxNet as a service by starting MxNet with the corresponding parameters The following call up parameters are available mxnet32 exe i
129. orm calculations Call iqa5 exe cmd Analyze 21 iqa588 821 exe cmd Returns iQ Analyzer CommandLine Version 5 0 build 001 Syntax ieaX cmd lt ImageFile gt lt SettingFile gt Module Options cmd fixed flag as first argument use always cmd ImageFile path to imagefile wildcart can be used for filename e g c temp jpg SettingFile path to settings file Module module you want to use Options overwrite settings of the settings file see documentation You have to define at least three arguments with additional optional ones ImageFile lt SettingFile gt Module Options 4 1 1 lt ImageFile gt This is the path to the image to be analyzed Example cAlmages oecf20 jpg iQ Analyzer 19 4 COMMAND LINE INTERFACE Q Like in the iQ Analyzer you can also analyze a set of images by selecting the first one Example cAlmages oecf20 00 jpg The software analyzes the specified image plus all images that have the same name but a different counter like oecf20 01 jpg oecf20 02 jpg and so on if enabled in the settings You can also use wildcarts Example cAlmages oecf20 jpg The software will analyze all images which filename matches the names including the wildcart 4 1 2 lt SettingFile gt The iQ Analyzer can handle two different types of setting files a text file and a myset file TEXT FILE The software comes with a preconfigured text file in the Data folder This file JEA set txt contains a
130. ortion negative Pincushion Distortion positiv EE Lens Geometric Distortion Definition The lens geometric distortion is defined as LGD 100 E H dot distance from center of image H undistorted dot position The geometric distortion for a grid position is the delta between the radial distance of the actual grid position H and radial distance to the ideal grid position H devided by the ideal grid position H H H indicates negativ distortion barrel distortion H gt H indicates positive distortion pincushion distortion 9 6 1 Settings Before starting analysis of the distortion charts you have to define some settings ADVANCED SETTINGS By using the Adanced button the Advanced menu opens Advanced Advanced button and the opening Advanced menu iQ Analyzer 128 9 MODULES DISTORTION Q LGD vs Field This adjusment affects the graphical presentation Distortion vs Field and the calculation of the value LGD worst fit Poly Fit Degree The Distortion vs Field plots the distortion of every cross see graphical resolution and calculate a line of best fit for the image Changing the degree of the polynom adapts the line as necessary We recommend a polynomial degree of 3 for standard distortion figures For more complicated and or strong distortion figures the polynomial degree might be increased A look at the graphical presentation will sho
131. percentage value in the center gives the ratio between Nyquist frequency and the limiting resolution of the average of all segments Centering problems of devices can be seen easiliy in this illustration Siemens MTF Overview Siemens MTF Segments LP Pix Siemens MTF Segments The MTF is plotted for each segment average of all stars The y axis represents the modulation the x axis the spatial frequency The red dashed vertical line indicates the Nyquist frequency The red dashed horizontal line indicates the modulation which is specified as limiting iQ Analyzer 108 9 MODULES RESOLUTION Q resoution in the Advanced Settings This illustration is usefull to see differences in horizontal und vertical resolution Siemens MTF Stars This plot shows the MTF of each siemens star The MTF is calculated as the average of all segments In the table you find the limiting resolutions of each star the limiting value can be set in the Advanced Settings for SFR Siemens The red dashed vertical line indicates the Nyquist frequency The red dashed horizontal line indicates the modulation which is specified as limiting resoution in the Advanced Settings Siemens MTF Stars LP Pix Group LP PIX Siemens MTF Group This is a more compact illustration of the MTF of the siemens stars In the Advanced Settings for SFR Siemens you can combine stars to groups iQ Analyzer calculates the average for each group In the table you
132. prove the performance of the other displays Waveform Monitor The video signal can be visualized for one line or the entire frame This can be performed for the luminance signal Y the color difference signals Cb Cr and the color signals R G and B as single channel or parade view You can also toggle between single line and full frame display The right vertical axis shows digital values 0 255 Digital video signals range from 16 to 235 indicated with the dashed line Values between 0 and 16 and 235 and 255 are reserved for the foot and the headroom The left vertical axis displays the digital values 16 235 as percentage The waveform monitor can be switched off if not used this can improve the performance of the other displays iQ Analyzer 63 8 VIDEO Q Vectorscope The vectorscope graticule can be set up for 75 or 10096 referred to EBU Color Bars If you have a custom graticule layout file you can select it in the Advanced Settings and use it by the Custom toggle button You can switch between single line and full frame display The vectorscope can be switched off if not used this can improve the performance of the other displays vectorscope set up for 75 vectorscope set up for 100 COMPARISON LIVE VIDEO SOURCES ONLY The comparison module allows a fast and easy color evaluation of live video signals The human eye is a very sensitive instrument for color comparison especially f
133. ps these names are reserved and CM must not be used iQ Analyzer 90 9 MODULES COLOR CREF Data Edit Groups Here you can see and edit the reference data If you have chosen to open existing CREF Data reference file in the beginning apah Es we peo gi you will immediately see this m oo gl ZEN el T n a D8000 08000 07000 Fe dialog 43 186000 193000 15 8000 Fg M a Lenza Emorous Seve crer Define or edit reference white patch which is used as white reference for further calculations and set the white point D50 D55 D65 A C Fill in or change XYZ data typing the values into the table To assign a group to a patch click on the corresponding check box Note that saving your file a group Color will be created or updated containing all the non neutral patches referring to the check boxes in the Neutral column To load new or another XYZ dataset from a file use the Load XYZ data button To edit groups press Edit groups button You will be able to add remove and rename your groups When done save your reference file by pressing Save CREF button You can add a new group Wizard Color Meta Data Import putting its name into the empty Edit Groups field and pressing Add To rename or remove a group fon pera Eje choose it from the list give it a Neutral new name in case of renaming and c
134. r assume gray patches to be linear den files are files with includes patch densities for linearization Defines the aim function MTF forced all values in the image towards zero by the minimum value So the minimum in the input image is set to zero in the linearized output image The maximum in the input image is set to the maximum signal level so the result is 0 to Imax Imin lw minimum of input image Imax maximum of input image FullDataRange uses the full bitdepth of an image Littmin 0 Linmax 2 1 255 for 8 bit Lin minimum of the linearized image Linmas aximum of the linearized image FulllmageRange depicted the minimum and maximum digital value of the input image as minimum resp maximum digital value in the output image Inin tO Is Litmin Imin s Lih har The degree of polynomial fit for linearisation can be adjusted default 4 If Global menu Gray Patches is selected Lin Source defines which subchart is source for linearization Select the patches for linearization if you have choosen Gray Patches Other The number of the subchart is set in Other Subchart Siemens uses the 14 gray patches around a siemens star edge uses the additional gray patches 0 4 0 5 0 6 of an edge structure iQ Analyzer 106 9 MODULES RESOLUTION Q noise uses the gray patches of the noise structuer Note that not every noise patches contain gray patches In this case you have to choose siemens
135. ray Scale Test Chart 13 steps TE223 200 1 TE240 Scanner Dynamic Range Chart ISO 21550 OECF Noise Chart with 20 gray patches ISO 14524 TE241 ISO 15739 10 000 1 100 000 1 1 000 000 1 TE259 OECF Noise Chart with 20 gray patches 10 000 1 TE2e4 OECF 20 Chart ISO 14524 15739 10 000 1 100 000 1 1 000 000 1 TE269 OECF 36 Chart ISO 14524 15739 10 000 1 100 000 1 1 000 000 1 29 31 3230 33 35 36 TE262 UTT A3 iQ Analyzer 9 MODULES COLOR Q 9 3 COLOR In the Color module you can analyze images due to their color reprodroduction quality You should consider that a perfect color reproduction could but must not lead to a nice looking image The color charts e g the ColorChecker SG have to be illuminated homogeniously The used color charts are shown in chapter 10 CHARTS USED FOR iQ ANALYZER Color tab 9 3 1 Settings ADVANCED SETTINGS By using the toggle button Advanced the advanced menu opens Advanced Display Profile By using the button you can select an icc icm profile for your display If no display profile is selected SRGB is used Color Difference Formula The iQ Analyzer calculates two Lab data sets the reference and the image sample From this data the color difference Delta E is calculated You can choose between three methods and formulas for calculation of color differences most common is CIE1976 CIE1976 AE AL a Ab AL L oues T
136. respanding for Undershoot Modulation The measured modulation in the linearized image This value should be close not necessary equal to the modulation of the target EDGE PROFILE The edge profile gives information about over and undershoot and edge width The pixels are bined by their distance to the fitted edge despcription Edge Profile 250 edge width max_over max 150 max 10 Dyn amp amp 100 50 min 10 Dyn z min 10 89 87654 3 2 4 0123 4 5 6 7 8 9 10 Position pix The y axis is the intensity in digital values for a 8 bit image from 0 to 255 The x axis represents the position related to the edge So value 0 is the position of the maximum of the first derivative of the edge profile For example a value of 4 means 4 pixel right of the edge therefore a value of 4 means 4 pixel left to the edge Left always represents the low intensity right the high intensity side of the edge The reported value is the 10 edge width The edge width is the distance in pixel between two points in edge profile First point is reached by an increase of the intensity by 10 Dyn second point is reached at max 10 Dyn with 10 Dyn 0 1 max min iQ Analyzer 116 9 MODULES RESOLUTION Q Edge Profile AII The illustration represents the edge profile intensity of all edges with different modulations e g eight edges in TE253 NoiseLab In the table you find the edge width Edge Profile
137. riggers an acquisition A number of frames as defined by the Trigger Trigger Batch settings is captured and shown in the file list These files are automatically saved folder file format and file name prefix can be defined in the Advanced menu Captured Frames The list contains all frames captured as defined in the trigger menu You can delete selected frames from the list using the button or clear the entire list pressing the C button The saved image files will not be removed Select one ore more frames by using ctrl and mouse click Choose an iQ Analyzer module in the dropdown menu and press the Pass button to pass the frames to the module for an extensive analysis Preview Measurement and Comparison See section 1 4 of this chapter iQ Analyzer 59 8 VIDEO 8 1 2 Settings for video files General Select Video File in the Hardware dropdown menu The selection of the video file is accomplished in the edit field below Please press in order to select the video file The file name and path are then displayed in the edit field Trigger Batch A trigger defines the start position in the video file for capturing the defined number of on the next acquisition triggered by the Capture button You can create multiple triggers for a single video file Please navigate to the desired position in the video file using the timeline slider and press the button You can also press
138. right to the graphical results warning level M Limit Patch Size to color bar To reduce calculation time you can limit the the size of the analyzed patches The default value is 50x50 pixel o limit the paztch size patch size for analyze iQ Analyzer 88 9 MODULES COLOR Q Size of the Color Comparison Image In the color module a color comparison image is saved during the calculation You can choose the size of this comparison image 1200 1600 2100 2800 dropdown menu for Color Comparison Image Color Comparison Image Edit Create Reference Data By using the button you can edit existing reference data or create new ones Insert your own values or import existing files by using the Import button Reference Data Editor use the button to open the editing window Pressing this button will start a wizard helping you to edit existing reference data or create new dataset Select action Choose between creating a new Wizard Color Meta Data Import reference dataset or opening an Seet existing cref file 9 New CREF fle O open CREF te tarn C Chart Layout Load chart layout data file Wizard Color Meta Data Import chart matching your chart to UE create new dataset You will find these files in the Chart folder of your Analyzer installation File path Load chari data fie chard iQ Analyzer 89 9 MODULES COLOR XYZ Da
139. row button Hide the tables by clicking on the arrow button The top table shows the Exif data of the active image if stored by the camera Below the Exif data the numerical results are outlined TV EBU TV SMIA The results of distortion calculation are shown as EBU TV Distortion and SMIA TV Distortion SMIA Standard Mobile Imaging Architecture The SMIA definition has been widely adopted in the mobile imaging industry In the traditional definition TV distortion is the change A in the center to top distance divided by by the bottom to top distance TV Distortion 100 AH r numerical result of distortion calculation iQ Analyzer 134 9 MODULES DISTORTION In the SMIA definition both A and B are bottom to top distances A B x 109 SMIA TV Distortion Aan t S LGD Lens Geometric Distortion The Lens geometric distortion is delivered in three different values LGDmean The mean value is the average of lens geometric distortion of all grid positions LGDworst The worst value is the maximal value of distortion LGDworst fit The worst fit is the worst value fitted to a polynom which degree is defined in the advanced settings CA Chromatic Aberration CA G R mean The average distance in pixel between the green and red channel CA G R max10 The mean value of the ten largest distances between green and red CA G B mean The average
140. rs for SFR Siemens on 9 positions in the image with additional gray patches for linearization A 1 Harmonic Siemens star 144 cycles per circle A 2 Gray patches for linerization even distributed between minimum and maximum density Each star is segmented in eight parts The iQ Analyzer can determine the resolution for each segment seperately Numbering of the Siemens star subcharts in the iQ Analyzer Software 2 Slanted edges for SFR Edge in four different modulations with additional gray patches for BS independent linearization 81 Ba B 1 Edge slanted by 10 100 modulation B 2 Edge slanted by 10 80 modulation 4 B 3 Edge slanted by 10 60 modulation B 4 Edge slanted by 10 40 modulation B 5 Additional gray patches 0 4 0 5 and 0 6 reflectance BA B3 ae iQ Analyzer 176 10 CHARTS USED FOR iQ ANALYZER Numbering of the slanted edge subcharts in the iQ Analyzer Software 3 Gaussian white noise patches with different variances and a gray line between patches four flat patches without noise C 1 no noise 0 5 of Dmax Dmin C 2 gaussian white noise o 1 4 mean as C 1 C 3 gaussian white noise o 1 8 mean as C 1 C 4 gaussian white noise o 1 16 mean as C 1 C 5 gaussian white noise o 1 2 mean as C 1 C 6 lien between patches C 2 and C 3 mean as CA Numbering of the noise patches subcharts in the iQ Analyzer Software 10 15 TE255 Flat field A diffusor plate to
141. s applied to the data 6 1 3 Batch Processing To use the batch processing add image files with delete with and clear list with C Select between Process file using dcraw and Process file using dcraw make RGB if still bayer image and press Run batch iQ Analyzer 29 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS META Q 6 2 META The meta data of the image files are red out and displayed in the Meta module You are able to add data and make adjustments Some information of the Image Properties e g color space and image direction are used for calculation In the result text file all meta data are integrated in the header if activated in the settings META tab 6 2 1 Device Information about the device Pixepitch um is calculated by insertig values for Width mm and Height mm and pressing the enter key 6 2 2 Image Properties Rotate By using the dropdown menu you can rotate and flip the images The image must have landscape orientation and show the chart accurate to side iQ Analyzer 30 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS META Q Chart Height The dropdown menu enables to define the chart size related to the image file to reduce calculation time Example When you have several pictures with different chart sizes related to t Height LayoutFile the image size choose 0 2 1 When you have several pictures with similar chart sizes related to the image size
142. s that no linearisation will be applied for calculation Linear assume gray patches to be linear den Files are files with includes patch densities for linearization Defines the aim function MTE forced all values in the image towards zero by the minimum value So the minimum in the input image is set to zero in the linearized output image The maximum in the input image is set to the maximum signal level so the result is O to ImaxImin Inn minimum of input image lm maximum of input image Normalized Using this setting the image data is linearized using the gray patches but the black offset is not corrected different to MTF setting As this would lead to different MTF values depending on the exposure of the image the resulting MTF is normalized to a reference modulation The reference modulation is calculated based on the black and the white patches used for the linearisation This method shows only minor differences to the MTF setting when using a full contrast siemens star like the TE253 or TE268 but has advantages using low contrast siemens stars In this case an potential undershoot sharpening is represented in a better way The degree of polynomial fit for linearisation can be adjusted default 4 If Global menu Gray Patches is selected Lin Source defines which subchart is source for linearization Reduce analysis to radii If you enable this option analysis is only applied to this specifi
143. s you to collect and export general measurement data mean std max min These are the utilitys coming with the Measurement module of the iQ Analyzer Version 6 e Contour e Histogram Data e 2D FFT e R GB G e SFR single edges e VN e Derivative iQ Analyzer 7 2 INNOVATIONS OF THE iQ ANALYZER VERSION 6 Q XML OUTPUT Choose if a txt file or a XML file or both is saved after the analysis This new option to store all the results as XML files enhances the comfortability of linking the results to your processes K xmi version 1 0 encoding yts 8 BS El iQ Analyzer E General HB Software lt Name gt iQ Analyzer lt Name gt lt Version gt 6 0 0 lt Version gt lt build gt F lt Software gt lt General gt lt MainFile File temp XML TE255 shad xgk 8bit y ipg gt lt ExtFile File temp XML TE255 sbad rak 8bit y jpg gt Header File Path temp XML TE255 Path lt Name gt shad rgb 8bit y jpg lt Name gt HHH PDF REPORTS The new iQ Analyzer is able to create a pdf file with your results edited as a report So the data could be easily provided to related persons in a nice to compare structure REQUIREMENTS MENU The Requirements menu contain limits or ranges for different values The requirements can be adjusted for indivilual needs The limits will be displayed in the graphical and numerical results This feature facilitates an immediately assessme
144. sents a cross in the image X and Y are height and width of the image in pixel iQ Analyzer 132 9 MODULES DISTORTION Q vs Field CA GR The illustration shows the geometric distortion for every grid position cross The crosses are devided into the four quadrants and colored The black curve indicates the line of best fit for all grid positons The coefficients are also displayed The degree of the polynom can be set in the Advanced Settings Poly Fit Degree If you select LGD vs Field Fit Quadrants in the Advanced settings a line of best fit ist displayed for every quadrant additionally The x axis indicates the distance from center The distance from center to one corner is set to H 1 The two black vertical lines mark the half of picture height 0 6 and the half of picture width 0 8 The illustration visualizes the chromatic aberration in the image You can choose representation of distance in pixel between the green and red channel CA GR the green and blue channel CA GB and the maximum of both iQ Analyzer 133 9 MODULES DISTORTION CA GB see CA GR CA max see CA GR CA longitudinal Describes the effect that the shape of the crosses vary for the three channels because the focus point shifts back and forth 9 6 4 Numerical results On the right of the views you can display the numerical results by clicking on the ar
145. settings press the Starf button You can select the region of interest by drawing a rectangle around the region and double click on it or use the right mouse button and press Crop Image and the analyzing process starts window for manual RO detection rectangle around your region of interest ADVANCED SETTINGS By using the toggle button Advanced the advanced menu opens Advanced Check Cluster Enable this checkbox if the defect pixel also shall be analyzed for clusters A cluster contains of at least two adjacent pixel This will encrease the computing time iQ Analyzer 138 9 MODULES HISTOGRAM Maximum number of pixel that are reported in PixelMap and Resultfile Set the level from this no display of outlier pixels in the pixelmap is shown left number of outlier pixel is less than the level set in Max Count PixelMap and the pixels are shown in the pixel map right number of outlier pixel is greater than the level set in Max Count PixelMap and an information ist shown 9 7 2 Graphical representation By using the first dropdown menu you can choose the displayed result Histogram or Pixel Map In case of Histogram you can choose between repesentation of direct and logarithmic third dropdown menu The analyzed images can be selected by using the second dropdown menu dropdown menu for selecting results images and representation Histogram In the histogram view the counts direct or logarithmic
146. stogram for each ROI the pics last captured values appears most Ku em redish the earlier captured ones more 180 3405 bis m contour plot of the contour for each ROI the last 113 0048 captured contour appears most redish M the earlier captured ones more blueish 2D FFT Plot of 2D fast fourier transformation for the active ROI R G B G Plot of color shading The limits are set in the Requirements even when deactivated SFR single edges Frame an edge in image by using the rectangle Choose between two plots related to SFR edge SFR SFR edge determined for a single edge Profile The edge profile gives information about over and undershoot and edge width The pixels are bined by their distance to the fitted edge despcription VN This utility calculates the visual noise on the active ROI Derivative Tool to determine the best focus on a slanted edge or a Siemens star The focus is best when the peak of the derivative is highest iQ Analyzer 144 9 MODULES MEASUREMENT Q 9 8 4 Numerical results Statistics The statistics beyond the image view always show the actual values of the selected area The values are seperated displayed for R G and B mean average of the pixels in the ROI std standard deviation of the pixels in each ROI max maximum value in the ROI min minimum value in the ROI Results Tables You can collect values of the selected area These values are collected in the table The
147. sts AG uerence O sample Ab b stores b sample l lf you express the Lab in polar coordinates you get LCH where L is the luminance C the chrominance saturation and H the hue colortone Delta E Advanced settings of the color module indicates the overall difference between reference and sample To get more detailed information about the difference it is interesting to see the difference in Luminance Delta L and hue Delta H iQ Analyzer 85 9 MODULES COLOR CIE2000 1 1 CIE1994 Chromatic Adaption AL Loue 7 Lapi AC Crejerence C AH Aa Ab AC 2 2 2 kS kese kuSu kese kuSu Compared to CIE1994 see next method the rotation term is added as the fourth element This term only takes effect in blue region 2 2 2 k S keSe ky Si in iQ Analyzer the following parameters for graphic and photography are used kp ko ky 1 S 1 Sc 1 0 045 Csampie SH 1 0 015 Csampie sample The Lab TIFF specification the ICC profile specification and Adobe Photoshop all use a D50 2 standard observer basis for Lab So all working spaces that are not similarly defined have to be adapted from their native reference white to D50 For doing this operation different methods could be used The chromatic adaptation algorithms may all be implemented as a linear transformation of a source color Xs Ys Zs into a destination color Xp Yp Zp by a linear transformation M
148. ta You can load XYZ data from a Wizard Color Meta Data Import text file or put it in manually enin Supported data formats are iQ 9 Load XYZ data tle a Analyzer v3 x files Filetype E Analvzerv3x v eyeOne eyeOne Pro files or D i custom file formats The O Manuaiinput measurement order for the IT 8 charts must be row by row Ce Coen Custom XYZ File Format If your XYZ dataset is available in a custom file format Wizard Color Meta Data Inport Custom XYZ Fle Format you need to provide information about the file structure It ieii Footer ines concerns the number of header Column with patch rames and footer lines number of a Delititer Ct tor tabustor column containing patch names as well as a delimiter character Cora Note that the data must be ordered in a table form Chart Layout Parameters f the patches on your Wizard Color Meta Data Import chart are ordered in a table form aaia ie e g Color Checker select how CMS data was obtained Choose CET es between Column by column and Graton Row by row depending on the order the data was measured Patch Groups You can create groups e g Wizard Color Meta Data Import SkinTones Glossy and assign E US them to the patches Creating a new dataset the group Neutral will be created automatically and the Color group will be created while saving the file Therefore Number ot grou
149. tal number depending on the luminance of a target you have to supply the actual luminance of each patch in cd m You can choose between three methods Ill 2 Lum Luminance Density lito Lum Illumination to Luminance is a simple method not quite accurate and no luminance meter is required The luminance is calculated from the illumination and the densities of the chart patches Patch Densities Choose the density file of the chart e g TE240 ChartNo1 den The default folder for the den files is C Program Files lmage Engineering iQ Analyzer 6 0 0 Data iQ Analyzer 78 9 MODULES OECF Q Luminance Density In the advanced settings you can create own density files import existing ones make changes according to the datasheet which is delivered with the testchart and save them Illumination lux Set the illumination of the chart If Mum o you do not insert a value for illumination a popup E window will appear when you press the Start button Cancel popup if illumination is not set Most accurate method that starts a complex measurement If there are already existing luminance data or the light source is not homogeneous you can choose the direct method for setting luminance data Luminance Data Select the file for luminance data In the advanced settings you can import already existing luminance data make changes and save them This method is recommended for devices with constant
150. tartUp Restore settings from last session The current settings will be used when a new session is started foo sins ENNECTTTTUCENN save and load settings Restore settings from this file The selected file from the dropdown menu is used when a new session is started Load settings from selected file Choos the mySetting myset file from the dropdown menu and load the settings by using this button iQ Analyzer 42 6 IMPORT GENERAL SETTINGS AND REQUIREMENTS GENERAL SETTINGS Q Save current settings to file Saving an actual setting could be done by clicking on this button an saving it with an indvidual name e g mySetting myset Note For using the myset files in the iQ Analyzer Home the filename must not beginn with numbers Please name myset files beginning with letters for example 6 5 5 Updates Check for files All menus that contain data files chart den lum myset etc are reloaded It is useful if you have added data or have changed paths in the section Filepaths amp Filehandling Check for updates This button links you to the iQ Analyzer information on the Image Engineering website Here you can check if you are using the most actual version of the iQ Analyzer Compare the version number of the offered iQ Analyzer on our website with the version information at the top of the iQ Analyzer window For security reasons we do not communicate directly with any server 6 5 6 Internal Calculations
151. ter Shading Luminance Color Visual Noise Noise 9 9 3 Numerical results For further information of the results for OECF Color Resolution and Shading please consult the relevant chapter in this documation OECF 9 9 2 3 Numerical results Color 9 9 3 3 Numerical results Resolution 9 9 4 3 Numerical results Shading 9 9 5 8 Numerical results 9 9 4 TE42 chart The TE42 chart is available in the size A1066 For a detailed describtion including numering of subcharts an ROls please see chapter 70 TE42 Forty Two Multi purpose chart for high speed camera testing iQ Analyzer 150 9 MODULES UTT Q 9 10 UTT The UTT module is designed to analyze the Universal Test Target UTT and provides an insight into the complete image quality of all types of high end cameras and scanners used for archiving M UTT tab The UTT chart has either to be cropped exactly or the environment has to be nearly homogeneous most suitable is a homogeneous white gray or black background Cropped UTT target DIN A3 UTT targt DIN A3 in a homogeneous environment The UTT target is available in the DIN sizes A4 and A3 to AO The formats A3 to A0 consist of tiles A3 is one tile A2 consists of two tiles A1 of four tiles and AO of eight tiles The A4 format has a slightly modified design only two gray scales and one set of color patches A0 The UTT formats A3 to AO consist of tiles iQ Analyzer 1 2 9 MODULE
152. the extension filename check jpg is saved automatically In this image the ROls are marked Path for saving and image quality type can be defined in the settings Displays the original image The waveform visualized the distribution of luminace values Y of the image The image is read line by line x axis and the luminance values are outlined as percental left y axis or digital values right y axis The brighter the graph the higer the appearance of the luminance value The RGB waveform displays the the distibution each for R G and B values The color vectors are displayed optically in a circular scale The higher the color saturation the further away from center is the shown chromaticity coordinate Achromatic tones result points in the center filename check jpg zm Waveform RGB shading module Vectorscope color module Representation where the analyzed regions are marked in gray The Checklmage named with the extension filename checkjpg is saved iQ Analyzer 50 7 ANALYZING PROCESS AND RESULTS Q automatically Path for saving and image quality type can be defined in the settings Checklmage resolution module Centerlmage resolution module Centerlmage The star from center to a defined see advanced settings for SFR Siemens percentage of the Nyquist frequency is shown The inner circle shows the Nyquist freyuency The other two delineated ones are 10 of Nyquist and 50
153. tio of the signal value to the standard deviation of the signal value iQ Analyzer calculates a Y luminance image and uses this for further calculations The results are also indicated as digital values DV The results differ dependent of the ISO 15739 version which is set in the advanced settings because of the varying calculation of noise and exposure ISO V1 outdated version of ISO 15739 uses the three noise patches contained in the chart layout ISO V2 actual version of ISO 15739 measures noise at the defined luminance value The following calculations are based on the ISO15739 V2 For the focal plane OECF the reference exposure shall be determined as the log exposure value corresponding to a digital level of 245 on the focal plane OECF curve The total fixed pattern and temporal signal to noise ratios are measured at the luminance value that is 13 of the luminance at the reference exposure Lovr 0 13 Lpy Ly inverse logarithm of the log luminance value at the reference exposure Rr Rr log luminance value at the reference exposure Ry st a 1 245 SNR total Total noise means all unwanted variations captured by a single exposure The signal to noise ratio is determined by SNR Lyn i gain ne remental total c total Cut totali n Grota Standard deviation of the total noise STD total SNR_temp Temporally varying noise means random noise due to the sensor dark current photon shot noise analogue
154. tolerance limit defined in the specifications Absolute reference values Ref for the luminance of the gray patches of the checker board and the differences Delta L between the reference and the sample Maximum tolerance limit defined in the specifications The width of the squares are compared to the average width over the whole image The result of the distortion measurement is given as percentage The reference value Ref is the average width over the whole image Maximum tolerance limit defined in the specifications Resolution is measured on the nine resolution patches topf left top center top right center left center center center right bottom left bottom center bottom right at each horizontal and vertical slanted edges left right top bottom Also the mean average is calculated SamplingEff is SamplingEff spec Min Sampling Efficiency horizontal vs vertical MTF10 lp mm is MTF10 lp mm spec Min MTF 50 Ip mm MTF50 lp mm spec Min MaxModulation is MaxModulation spec Max Diff horver 96 is Diff horver spec Max Average of the the sampling efficiency of the four edges minimum tolerance limit defined in the specifications If the limiting frequency equals Nyquist frequency sampling efficiency ist 100 MTF10 is the highest spatial frequency with a modulation greater than 10 linepairs mm or ppi Minimum tolerance limit defined in the specifications MTF50 is the highest spat
155. u want to use another OECF or an idealized OECF you can load an OECF result file from the iQ Analyzer OECF module Use the button and select an OECF txt file by using the button you can select an OECF file iQ Analyzer 120 9 MODULES SHADING Q ADVANCED SETTINGS Processing Median Filter To reduce noise the image is filtered before analyzing Define the matrix size of the median filter 1x1 means no filtering by using the 11x11 matrix the picture is filtered most Note If size of median filter is not 1x1 noise measurement has no significance ROI Distribution and Size Choose number and size of ROI patches The higher the number and size the exact is the shading calculation But it also will increase calculation time patches 21x15 patch size 10x10 patches 41x31 patch size 30x30 Lum and Sat Boost Image Adjustments to set if LumBoost and the SatBoost image are saved and specifications to create them Create and Save Boost Images enables disables if boost images luminace and saturation shall be created and saved during calculation Reduction reduces the image size and though the calculating time By using the dropdown menu you can define the reduction mode Fixed reduces the picture height to the value defined in Reduction Height picture width will be adjusted proportional e g original image 2000x3000 px Reduction Height 50 reduced image 50x75 px Relative reuces the pict
156. ure height percetal to the value defined in Reduction Factor e g original image 2000x3000 px Reduction Factor 0 05 reduced image 100x150 px iQ Analyzer 121 9 MODULES SHADING Analysis Normalization Statistics Display Smooth Filter By using the dropdown menus you can specify the normalization process Norm to specifys the region that is used for normalization center uses the center of the image for normalization reference center 0 maxpos sets the coordinate with the maximal luminance as reference for normalization reference max Luminance 0 Norm size sets the norm size of the area which is used for narmalization e g 1x1 just one patch 3x3 average of 3 patches Norm Color Shading to Mean activates that the color shading shall be normalized to mean value of image instead of to the maximum This is according to the non puplished IEEE CPIQ standard The Percentile rank of a score is the percentage of scores in its frequency distribution which are lower or equal to it Insert values for the percentiles you want to get from calculation In the results the percentiles are displayed in digital values DV and f stops values for percentiles results in digital values DV and f stop The graphical results can be displayed smoothed By using the dropdown menu define the filter matrix 1x1 means no filtering filtering with an 11x11 matrix effects most During the analys
157. ut the luminance distribution explained in digital Values DV and f stops depending on the choosen normalization Example a percentile of 5 results in a digital value of 17 1 This means 5 are less and 95 greater than 17 1 define values for percentiles reults after calculation Color CIE A Ea Delta E CIE E express the average color shading In contrast to the Delta E calculation that is used in the color module the calculation of Delta Ea is done without luminance L So you get information only about differences in colors without luminance AE Aa Ab AE CIE1976 A AL Aa Ab iQ Analyzer 125 9 MODULES SHADING AL Lieference os Lampe Aa a reference sample Ab bens b sample CIE A C Delta C CIE C express the average color shading AC C reg C apis AG R The average difference between green and red channel explained in digital values AG R The average difference between green and blue channel explained in digital values Noise A SNR dB The maximum difference of SNR explained in dB A VNSet1 The maximum difference of visual noise viewing condition set 1 A VNSet2 The maximum difference of visual noise viewing condition set 2 A VNSet3 The maximum difference of visual noise viewing condition set 3 9 5 4 Available shading charts These chart layouts are provided as default with the iQ Analyzer Version 6 Other designs and custom made chartlayouts could be
158. w you if you choose the right degree the line should lie smoothly between the calculated values with no excessive abberations Poly Fit Degree 3 Poly Fit Degree 8 Fit Quadrants The crosses are devided into the four quadrants of image Activate the checkbox and the line of best fit is not only calculated for the whole image but also for each quadrant one line of best fit is diplayed line of best fit for each quadrant iQ Analyzer 129 9 MODULES DISTORTION Q Display Limit LGD 2D Scales the warning scale for the 2D view of distortion Limit CA Scales the warning scale for the view of chromatic aberration Warning level in the 2D view of distortion 9 6 2 Analyzing process If there is a problem detecting all crosses you are directed automatically into the fail safe mode First you have to select another threshold for detection Default value is 1 Set this value to a lower value e g 0 5 if the image is blurred or has a great loss of sharpness to the corners Set this value to a higher value e g 3 if the image is sharpened strongly e g mobile phones select threshold Then select a region of interest in the image You have to select the ROI so that you still have 13 rows of crosses If you do happen to cut a column of crosses in the image do not include this column into the ROI Use the right mouse Crop Image or double click on the image and the analysing process starts sel
159. y detailed analysis over nine different image heights is possible with this chart The chart has an aspect ratio of 4 3 image size of 810x1080 mm or 3 2 image size of 810x1215 mm It is suitable for systems from 3 MP up to 30 MP ri E Wain star IS star 14 Cd star i3 star 12 2 The TE268 25x contains three main structures veli vt di l T i star 6 star 7 star pct gt a an eo star 19 star ME IL star 22 9 star 23 gt gt T 1 Harmonic Siemens stars for SFR Siemens on 9 positions in the image with additional gray patches for linearization A 1 Harmonic Siemens star 144 cycles per circle A 2 Gray patches for linerization even distributed between minimum and maximum density Each star is segmented in eight parts The iQ Analyzer can determine the resolution for each segment seperately iQ Analyzer 181 10 CHARTS USED FOR iQ ANALYZER Numbering of the Siemens star subcharts in the iQ Analyzer Software 4 Slanted edges for SFR Edge in four different modulations with additional gray patches for independent linearization ai lil B 1 Edge slanted by 10 100 modulation B 2 Edge slanted by 10 80 modulation B 3 Edge slanted by 10 60 modulation B 4 Edge slanted by 10 40 modulation BA B 5 Additional gray patches 0 4 0 5 and 0 6 B3 reflectance a4 Numbering of the slanted edge subcharts in the iQ Analyzer Software 5 Dead leaves patches ind gray
160. zero To describe the shape of the distribution the excess kurtosis is calculated The value becomes 0 for a normal distribution and is increased for leptokurtic distributions The kurtosis is calculated as the fourth moment devided by the square of the second moment of the distribution The second moment is the variance iQ Analyzer 117 9 MODULES RESOLUTION 4 m m l amp x u kurt 2 32 3 1 ES mi c Bl o JJ The kurtosis is calculated for the for different noise patches o 1 4 o 1 8 o 1 16 o 1 2 The y axes represents the relative count of digital values in the x axes The count of the values is expressed in percentage so a count of 10 means that one tenth of all pixel have this value Noise Histogram All This illustration shows the derivative of the four different noise patches on every side left top 1 4 left top 1 8 left bottom 1 16 left bottom 1 2 right top 1 4 right top 1 8 right bottom 1 16 right bottom 1 2 Noise Histogram Mean This is a more compact illustration of the noise histogramm iQ Analyzer calculates each the average of the left and the right edges with same noise 9 4 4 Available resolution charts These chart layouts are provided as default with the iQ Analyzer Version 6 Other designs and custom made chart layouts could be added on request For a detailed describtion of the charts including numering of subcharts an ROls please see chapter 10 CHARTS USED FOR iQ ANALYZE

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