SOFTWARE MANUAL STRETCHOUTTM
Contents
1. Project summary Project Name alaska1 Datum World Geodetic System 1984 Coordinate system WGS 84 Images Number selected images 363 Datum World Geodetic System 1984 Coordinate system WGS 84 Ground Control Points Number of GCP with enough image points 3 7 Datum World Geodetic System 1984 Coordinate system WGS 84 UTM zone 6N Latitude 65 1299754 Longitude 147 47351 5 3 4 Navigating the Insert Ground Control Points Module The insert ground control points module consists of three panels e The left panel shows the ground control point identifiers in alphabetical order e The middle panel shows the list of images in the project e The right panel shows the selected image on which a ground control point may be indicated by clicking on the ground markings visible in the image 20 Software Manual Stretchout Version 1 2 Ground control points Images Preview 1YL R0010100 JPG 2WL ine Delete clicked GCP 7WS Not enough image points 8YS Not enough image points aa zl closest position OWL Not enough image points ROO10102 JPG name 28YL Not enough image points ROO10126 JPG 0010123 0010103 0010077 0010098 ROO10122 JPG 0010078 0010076 ROO10127 JPG 0010121 7 6 0010104 0010079 0010097 0010075 0010153 0010152 0012. Datum World Geodetic System 1984 Coordinate system WGS 84 UTM zone 6 OK Cancel If the desired coordinate system is not available in the drop down lists you can add a coordinate system by uploading a PRJ file in well known text format using the from prj button However only PRJ files containing the seven TOWGS84 also called Helmert parameters can be used The status panel below the coordinate system selection buttons displays the GCP file name datum and coordinate system When you click OK the insert ground control points module opens automatically if the coordinates of the ground control points match the project coordinates reasonably well In case of mismatches for example if the x and y fields have been changed in the GCP text file or if a wrong coordinate system was selected the insert ground control points module will not open and the following error message will be displayed in the status panel 17 Software Manual Stretchout Version 1 2 Import ground control points From csv Help for GCP file format Select GCP coordinate system From list 2 FromEPSG Status Error one or more GCPs lie far outside the area covered by the images or the wrong coordinate system is selected Check that the correct GCP file or coordinate system is selected O The datum and coordinate system in which the GCPs are added in the project and set in this dialogue box will determin
3. www ensomosaic com 13 Software Manual Stretchout Version 1 2 5 PROCESSING WORKFLOW IN STRETCHOUT 5 1 Navigating the processing screen Projects can be processed through local desktop processing and or through Pix4D cloud processing Click the opening screen to open the Stretchout processing window The window layout is presented in the figure below 49 t stretchout 77 Project summary Project Name assenedegcpso 1itest Datum World Geodetic System 1984 Coordinate system WGS 84 Local processing Initial processing done no Mean ground resolution cm pixel Dense processing done no Dense sampling distance Orthomosaic and DSM generated no Orthomosaic resolution cm pixel 1 Blending factor 51 23441 3 76831 rica 51 2344 Cloud processing Uploaded no WY Layers Images GCPs 71 Processing areas Orthomosaic area Dense matching area 51 22753 3 76831 51 22753 3 77930 51 22753 Latitude 51 2389786 Longitude 3 76472175 In the main panel the image acquisition positions are displayed as blue dots on selectable background of either a grid map or satellite view When you hover the mouse over the main panel the coordinates are displayed in the lower right corner Putting the mouse arrow on an image position will display the i
4. corresponding files and images of each flight especially when you have multiple flights over the same area Mixing up flight files and images may go unnoticed at this stage but leads to flaws in the image processing or to error messages stating that the data cannot be processed 4 2 2 Remove flight Select a flight a single click in the list will highlight the flight in blue and click to remove the flight from the list You will be asked for confirmation to remove a flight 10 Software Manual Stretchout Version 1 2 Removing a flight from the list will not remove the flight and image files from your disk 4 2 3 Flight path To create a representation of the flight path for a selected flight in the list click the A button The corresponding KML file will be created in the folder containing the log file The logged GPS positions will be used to create a line of flight from takeoff to landing gt Nuolen kml Project Date and Time Duration min Awajishima 2011 11 29 10 37 39 41 Newmont 2011 12 07 19 19 28 04 9 i 2012 07 18 13 47 4 Tutorial 2011 11 15 19 07 5 Alaska 2011 05 13 02 34 A link to the KML file will shown in the toolbar above the flight list The link will open the KML file using the default software assigned to KML files on your system typically Google Earth 11 Software Manual Stretchout Version 1 2 4 2 4 Stretchout and Cloud Processing Select a flight and click 9 or d
5. the same folder as the log file for the respective flight Step 3 Select one of the flights and click the processing button again to start adding other flight projects as the main window shows up go to the project menu button in the toolbar and click add project From there on browse to the p4d files for the other flights you want to add repeat this for each flight You will see the added photos show up in the main window allowing you to check if the projects are contiguous and complete and see if the ground control points are covered by the flights if you have ground control points available If you have ground control points you do not need to add these for each separate flight before adding projects You can simply merge your projects first using the process described above and then add your ground control points for the whole contiguous block at once to save time Step 4 Go to the processing menu J again and choose save as to rename your project to the whole contiguous block When you click upload to the cloud or process locally 9 next the whole project with multiple flights will be processed as one 25 Software Manual Stretchout Version 1 2 6 FEEDBACK CONTACT GATEWING Gatewing encourages your comments concerning this manual or software We are committed to providing documentation and software that meet your needs Please send any comments by contacting us at support gatewing com Please includ
6. 0154 0010074 ROO10151 JPG R0010080 JPG 3 7 GCP with enough image points To remove an inserted ground control point from an image right click on the image name in the list and choose DELETE CLICKED GCP To remove a GCP from the project including all of its ground marker positions indicated on all the images right click on the identifier in the left panel list and choose DELETE Zoom in and out on the displayed photo by using the mouse scroll wheel or a touch pad By default the items in the image list are sorted according to position with the closest position to the respective GCP identifier displayed first in the list The closest position is calculated based on comparison of the GPS recorded image position and the coordinates in the GCP text file You can also sort the image list alphabetically by right clicking in the image list and choosing SORT IMAGES BY gt Pan by holding the right mouse button while dragging You can insert a ground control point into a photo with a single click of the left mouse button simply clicking again anywhere in the photo will move the ground control point to the new pixel that was clicked 5 3 5 Editing Ground Control 21 Software Manual Stretchout Version 1 2 Ground control can be edited after initial entry Users may find that they have to add or delete ground control points or need to select the ground control marker location s more accurately Th
7. The Stretchout processing generates the orthomosaic in GeollFF format available the projectname results folder This folder is automatically generated by Stretchout in the same directory where your X100 logfile resides 5 4 2 Pix4D Cloud Processing Click the cloud processing button or to upload your project Fill in your username and password and click the upload button to start transferring your images to our cloud server The username and password combination is exactly the same as the one used for registering the software see Licensing Stretchout 7 You can monitor the processing status at our cloud page http gatewing pix4d com More information on Gatewing cloud processing is explained here http gatewing pix4d com faq 23 Software Manual Stretchout Version 1 2 You can always stop the upload by closing down the Cloud Processing window It is possible to resume the upload at any time Project summary Project Name alaska 1 Datum World Geodetic System 1984 Coordinate system WGS 84 Images Number selected images 363 Datum World Geodetic System 1984 Coordinate system WGS 84 Ground Control Points Number of GCP with enough image points 3 7 Datum World Geodetic System 1984 Coordinate system WGS 84 UTM zone 6N Cloud processing User gatewing Upload Status 10 139 88 out of 1281 about 32 minutes 54 seconds remaining 591 5KB s C
8. e the datum and coordinate system of the output files Hence for projects without ground control the default output coordinate system is WGS84 UTM while the output files of projects with ground control will be georeferenced in the datum and coordinate system of the GCPs by default 5 3 3 Insert Ground Control Points Module In the main panel of the processing window the positions of the ground control points as determined from the coordinates you have entered will be indicated at first by red crosses If possible check the positions of the ground control points in the main panel of the processing window thoroughly Selecting a wrong coordinate system may not lead to the error message described above if such an error causes only a minor shift Hovering the mouse over a cross will display the GCP identifier next to the coordinate display in the lower right corner The following warning will appear in the project summary panel 18 Software Manual Stretchout Version 1 2 Stretchout Rapid version 885 alaska 8 9 Project summary Project Name alaskal Datum World Geodetic System 1984 Coordinate system WGS 84 Images Number selected images 363 Datum World Geodetic System 1984 Coordinate system WGS 84 Ground Control Points Number of GCP with enough image points 0 7 Datum World Geodetic System 1984 Coordinate system WGS 84 UTM zone 6N Warning At least 3 GCP must have enough image points to be tak
9. e the name of the document software and any comments errors found or suggestions you have for improving this manual or the software s operation Contact Gatewing customer support Tel 32 0 2 669 66 69 E mail support gatewing com 26 Software Manual Stretchout Version 1 2
10. en into account during processing GCP 2WL Latitude 65 1304131 Longitude 147 46692 For a project to be processed with GCPs ground marker positions should be indicated on the images for at least three GCPs When enough GCPs have been indicated in the corresponding images the warning message in the project summary panel on the processing window disappears Although a project can theoretically be processed with as little as three without error estimates or four GCPs allowing error estimates it is strongly advisable to add as many GCPs per project as possible with five as a practical minimum and more for larger projects consisting of multiple flights Even more importantly GCPs should be well spread out across the terrain towards the edges but also in the center in x y and z Ideally marker positions should only be indicated on images where the measurement point can be determined at the pixel level For each GCP to be included the corresponding positions should be indicated on at least two images When this is done the label Not enough image points disappears from the GCP identifier list and the cross in the main panel of the processing window turns green 19 Software Manual Stretchout Version 1 2 GCP ground marker positions should ideally be indicated on as many images as possible provided they are not blurred Indicating the GCP on images where the ground marker s are blurry may introduce small errors
11. erview 5 3 Ground Control 5 3 1 Importing Ground Control Points GCPs 5 3 2 Setting the Coordinate System 5 3 3 Insert Ground Control Points Module 5 3 4 Navigating the Insert Ground Control Points Module 5 3 5 Editing Ground Control 5 4 Image Processing 5 4 1 Local Processing 5 4 2 Pix4D Cloud Processing 5 5 Managing Multiple Flights 6 FEEDBACK CONTACT GATEWING 3 Software Manual Stretchout Version 1 2 SYMBOLS USED IN THIS MANUAL A caution message indicates an important reminder about correct procedures and practices in the operation of your software Ignoring these reminders may result in incorrect results without leading to actual error messages A hint message indicates helpful hints or shortcuts A reference message directs you to an internal reference within the document a related document or a web link A Software Manual Stretchout Version 1 2 1 INTRODUCTION TO STRETCHOUT Welcome to the Gatewing image processing software known as Stretchout to be used in conjunction with the Gatewing X100 aerial mapping and surveying system The Gatewing X100 unmanned aircraft system UAS flies automatically along a pre programmed path taking pictures at a specified altitude along parallel lines and with specified overlap between the image exposures At the same time position information of the pictures is recorded for further processing This image acquisition is used to map terra
12. g If you have already processed the imagery you can enter the ground control information and reprocess the data for higher quality positioning consistent with the accuracy of your ground control Enter GCP names and coordinates using the ADD GCP button on the toolbar A dialogue box appears when you click the button from which you can import ground control points in a list created in a spreadsheet program or text editor by clicking the from csv button Next to the from csv button there is a direct link to the GCP file format topic in the help file The names identifiers and coordinates of the respective ground control points can be imported either as space tab or comma separated TXT or CSV files both forms are accepted Ground control points listed in TXT or CSV files should not contain any headers Records are listed each on a separate line in the following order identifier latitude decimal degrees longitude decimal degrees height meter for GCPs measured in WGS84 lat long degrees or identifier x meter y meter z meter for GCPs measured projected coordinate system where x denotes the west to east position and y refers to the south to north position Note that lat long coordinates should be formatted as decimal degrees with negative entries for western and southern hemispheres When using a spreadsheet as GCP editor please make sure your system country settings are set to use a point as decima
13. gatewing A TRIMBLE COMPANY SOFTWARE MANUAL with Gatewing 100 UAS Version 1 2 Publication Date 9 October 2012 2011 Gatewing Gatewing is a registered trademark of Gatewing NV Stretchout and X100 are trademarks of Gatewing NV All other registered trademarks trademarks and names of products and companies used in this document belong to their respective owners All Rights Reserved No part of this document be photocopied reproduced stored retrieval system or transmitted in any form or by any means whether electronic mechanical or otherwise in whole or in part without the prior written permission of Gatewing Gatewing NV Ottergemsesteenweg 439 11 9000 Gent Belgium www gatewing com Tel 32 9 335 05 15 Fax 32 9 335 88 03 Mail documentation gatewing com 2 Software Manual Stretchout Version 1 2 TABLE OF CONTENTS SYMBOLS USED IN THIS MANUAL 1 INTRODUCTION TO STRETCHOUT 2 DOWNLOADING STRETCHOUT 2 1 System Requirements 3 INSTALLING STRETCHOUT 3 1 Stretchout 3 2 Licensing Stretchout 4 MANAGING PROJECTS IN STRETCHOUT 4 1 Opening Screen Toolbar Overview 4 2 Opening Screen Toolbar Using the Buttons 4 2 1 Add Flight 4 2 2 Remove Flight 4 2 3 Flight Path 4 2 4 Stretchout and Cloud Processing 4 2 5 Export 5 PROCESSING WORKFLOW IN STRETCHOUT 5 1 Navigating the Processing Screen 5 2 Processing Screen Toolbar Ov
14. ible be sure to run your first processing session in an environment where the connection is feasible Even if your computer is not connected to the Internet later Stretchout will run normally after a proper installation Users may install Stretchout on any computer T Software Manual Stretchout Version 1 2 4 MANAGING PROJECTS IN STRETCHOUT Stretchout allows you to manage the data input and output for each specific flight that you do with the Gatewing X100 Each flight has associated with it a set of imagery data log files that are created by the plane while in flight and if applicable a listing of ground control point coordinates To open Stretchout double click the Stretchout icon on your Desktop or from the Windows Start menu When you open Stretchout you will see an opening screen that allows you to manage your flights OO A y Project Images Date and Time Duration min Awajishima 1383 2011 11 29 10 37 39 41 Newmont 641 2011 12 07 19 19 28 04 Nuolen 510 2012 07 18 13 47 30 37 Tutorial 19 2011 11 15 19 07 02 02 2011 05 13 02 34 The flight list will show the project name number of images number of Ground Control Points GCPs time and date of the first acquisition in a flight and duration of the flight Flights can be sorted according to any of the columns by clicking the appropriate column header 4 1 Opening Screen Toolbar Overview The following actions are available the toolbar S
15. in for orthophoto creation digital terrain model creation or photogrammetry But before you can use the images from the Gatewing X100 to generate an orthophoto or digital elevation model DEM you must first have accurate information about the orientation of the aircraft and its position when each image was taken and the time at which each image was taken Some of this information is referred to as geotags which identify each image uniquely with an exposure station position These data are recorded in a log file aboard the aircraft The process of associating each image with its exposure station position is referred to as synchronizing or geotagging the images That s where Stretchout comes in Stretchout synchronizes or geotags the images once the images and log file information have been uploaded Next the images and exposure information can be exported to a stand alone image processing software package such as AgiSoft PhotoScan Pro Pix4UAV Gatewing Edition or EnsoMOSAIC The resulting data products from such image processing packages include orthomosaics DEMs and detailed reconstruction parameters in various formats allowing 3D visualization in GIS software and compatible packages for potential post processing 5 Software Manual Stretchout Version 1 2 2 DOWNLOADING STRETCHOUT Contact your dealer or Gatewing support for obtaining the latest installer file of Stretchout 2 1 System Requirements mi
16. is can be performed by clicking on the edit ground control button or by double clicking on a ground control point in the main window clicking save project the J project menu the number of actually indicated GCPs which may differ from the total number of GCPs in the added file will be added to the database in the Stretchout opening screen visible after closing and re opening the opening screen When generating a PhotoScan psz file from the export list the identifiers and the location of these GCPs on the images will also be stored in the generated project file 5 4 Image Processing In the processing screen you can optionally import ground control points and indicate ground marker positions You can then choose to process your flight locally using the 97 button or submit it to the Pix4D cloud server for processing using the GP button 5 4 1 Local Processing Click the local processing button 97 start the processing on your machine This will add the following pane to the bottom of the processing window Local processing 1 Initial project processing Full resolution DEM Not available 3 Orthomosaic generation vj Full Rapid Sampling distance 4 V Resolution Blending Individual ortho images Import DEM Start Status The desired steps can be selected before clicking the Start button You have the choice to carry out the steps one by o
17. l separator instead of a comma File Edit Format View Help GCP1 477905 7502 7223118 2152 209 2462 GCP2 478082 7574 7223067 1671 212 0126 GCP3 478520 4095 7223299 9745 211 9598 4 478387 7380 7223373 4258 212 3403 GCP5 478139 9841 7223282 0579 212 1512 GCP6 477871 7517 7223213 2151 211 6246 GCP 478106 2699 7222658 3433 214 7513 16 Software Manual Stretchout Version 1 2 5 3 2 Setting the Coordinate System After the GCP file has been selected you can use one of three options to set the coordinate system datum and projection zone in which the ground control points are measured Click the from list button to access drop down lists from which you can select the respective datum and coordinate system projection Alternatively you can set the datum and corresponding coordinate system by indicating the unique EPSG code see www epsg org Add GCP x e Import ground control points Select coordinate system Help for GCP file format Datum World Geodetic System 1984 Coordinate system WGS 84 TMzn35N WGS 84 TMzn36N Select GCP coordinate system WGS 84 Australian Centre for Remote Sensing Lambert WGS 84 Cape Verde National WGS 84 UTM zone 1N From list From EPsc WGS 84 UTM zone 2N WGS 84 UTM zone 3N WGS 84 UTM zone 4N Status WGS 84 UTM zone 6N GCP file loaded TCC_Photo_Target_PTS_UTM_Z6 txt Current coordinate system
18. loud processing Local processing Latitude 65 1289827 Longitude 147 47473 When you are using the cloud an e mail is sent to you as soon as the initial processing is over The corresponding Automatic Reconstruction Report can then be downloaded as a PDF file You should thoroughly review the report generated at initial processing before making the decision to move forward with the purchase of your desired products Ortho or Full e Ortho contains a basic orthomosaic e Full creates orthomosaic GeoTIFF KML tiles DEM GeoTIFF XYZ internal and external orientation parameters and several export formats 24 Software Manual Stretchout Version 1 2 5 5 Managing Multiple Flights Combining several adjacent flights for processing as one block can be done in the following way Step 1 Add your flights individually to the list in the Stretchout opening screen by indicating the respective files and folders and naming them appropriately Make sure there are no flights with identical image file names this may occur if you have for instance acquired some of the flights you want to merge with several cameras If so batch rename the files but avoid brackets or spaces or any other special characters Step 2 For each flight click the processing button to open the Stretchout processing window You don t have to do anything further here just click close again and choose save This creates a Stretchout project p4d file in
19. mage name next to the coordinate display View the corresponding image by double clicking the blue dot The Project Summary panel gives an overview of the project size GCPs and coordinate system along with processing status and statistics The display of image acquisition centers potential GCPs and polygons drawn to select processing areas see further can be toggled in the Layers panel 14 Software Manual Stretchout Version 1 2 5 2 Processing Screen Toolbar Overview The following actions are available the toolbar on Stretchout s processing screen e Click J in the Stretchout Processing Window to open the project menu from which the user can save projects add projects change the coordinate system and toggle the summary view e The 97 button allows to the image processing on your local machine e The 5 button allows you to upload your project to the Pix4D Cloud e Click the button to include your Ground Control Points e Click the button to modify your Ground Control Points e The button shows you the processing quality report e The button shows the build in help content The 27 button allows you to select a background image 5 3 Ground Control 5 3 1 Importing Ground Control Points GCPs To improve the accuracy of your mapping you can use ground control points that are well distributed across the area and elevation ranges of the project to fix
20. ne or by selecting all the steps at once When launching the local processing from Stretchout no changes can be made to the processing parameters i e rapid initial processing four times reduced resolution and step 2 dense matching is not available 22 Software Manual Stretchout Version 1 2 Step 1 In the Initial project processing section at the bottom rapid processing is done at one fourth of the original image resolution possibly leading to incomplete results while dramatically increasing processing speed When step 1 is completed the Automatic Reconstruction Report shows up in a pane at the right side of the processing window or can be consulted by clicking the report button The report can also be consulted in PDF format by clicking the PDF link in the report pane the PDF file can be found in the results folder of the project which is automatically generated in projectname results in the directory where the project log file resides Step 3 In the Generate Orthomosaic section the resolution is fixed at four times the native image resolution The area for which end products will be generated can be set by clicking Draw under Orthomosaic area in the Project menu Any polygon can be drawn by left clicking in the map pane to insert a vertex and right clicking to close the orthomosaic area The orthomosaic area should be drawn before starting step 3 The area display can be toggled in the layers pane
21. nimum recommended 00 Operating system Windows XP or later 64 bit Windows XP or later 64 bit Any 64 bit processor Any 64 bit processor Free hard disk space for 10 GB 10 GB processing 3 INSTALLING STRETCHOUT 3 1 Stretchout Stretchout is included free with each Gatewing X100 UAS System Kit and can run rapid processing for a rough and quick result While not a 100 guarantee of good results Stretchout can be used a bit like a proofing tool However it is also possible that the provided rapid processing may not deliver a complete result due to the type of land surface measured and the adverse effects of working at a reduced resolution although processing with a professional image processing solution may produce a good result However many users may find the orthomosaics from Stretchout to be adequate for their purposes e g GIS background layers 3 2 Licensing Stretchout To install Stretchout properly your computer must be connected to the Internet at the time of starting your first processing session This is so that verification of the license can be done Without this connection Stretchout will not start the processing window 6 Software Manual Stretchout Version 1 2 Log in credentials are communicated by your dealer or Gatewing These credentials are valid for Stretchout If you are planning to use the program on a computer where the Internet will not be access
22. o to launch the Stretchout Processing Screen in a separate window E 77 Project summary Datum World Geodetic System 1984 Coordinate system WGS 84 ing done no Mean ground resolution cm pixel Dense processing done not available Dense sampling distance Orthomosaic and DSM generated no Orthomosaic resolution cm pixel Blending factor Cloud processing Uploaded no Images WY Layers Images GCPs Processing areas Orthomosaic area Latitude 51 2705378 Longitude 114 43932 The processing module will be opened in a separate window You can switch back to the opening screen to manage your flights at any time and by selecting other flights you can open any number of parallel processing windows Note that if you begin local processing in several processing windows this usually means that each process will be processed sequentially as you generally will not have enough computing resources to have your processing run on separate threads that are as fast as a single processing job How you initiate local cloud processing all functions you can access in the processing module are covered in the Processing Workflow section of this manual Page 14 lf Ground Control Points GCPs identified in the Stretchout Processing screen they will be shown in the GCP column in the table
23. se SELECT The X100 system may take images while the aircraft is on the launcher Additionally the operator may have taken test images before the flight Be sure these images are deleted from the set of images that are in the folder selected by IMG DIR Otherwise the processing results will be erroneous and not likely to be useful 9 Software Manual Stretchout Version 1 2 LOG FILE FLY FILE and IMG DIR buttons will turn blue when valid location is set for them After you have set the IMG DIR by clicking SELECT you will see a dialogue box summarizing the file names of the LOG and FLY files and the number of images The dialogue box will prompt you to enter a flight name and confirm by clicking ADD The flight will be added to the list with a consecutive ID number LOGFILE FLYFILE IMG DIR Project Add project Duration min Awajishima a 39 41 Newmont d di 28 04 Nuolen Log file 10g20111115_190704 txt 30 37 Tutorial Fly file 10g20111115_190704 fly 02 02 Images 174 For project names use only alphanumeric characters not use any special characters including space dash underscore etc Project names are not case sensitive Two flights can have exactly the same project name Projects with the same name are stored in the internal database based on the differing project ID number image count duration and date and time of the flight Make sure to identify properly for yourself the
24. the solved photogrammetric model within the accuracy of your ground control system Generally accuracy of the positioning of ground control must be one half to three times the ground sampling distance or GSD the distance represented by a single pixel Typically in a flight that is operated at 150 m above ground level AGL GSD will be 5 cm Thus to be meaningful ground control must have an absolute accuracy in the range of 2 5 to 15 cm Remember that the referencing of the data products will be limited by the accuracy inherent in the internal consistency of the ground control coordinates you input Ground control points photo identifiable points for which you have coordinates in a single system datum and projection These points must be clearly visible in the photographs Many times markings are placed on the ground before flight to ensure that the points are visible but more permanently visible structures such as corners of road marks and artificial constructions can 15 Software Manual Stretchout Version 1 2 also be used The general recommendations for custom made ground control point markers include a unique appearance with an unambiguous point of measurement on the images a non reflective color contrasting with the substrate a size of at least five times the image pixel size and ease of use in the field When ground control points are available these should be entered first before beginning processin
25. tretchout s opening screen 8 Software Manual Stretchout Version 1 2 Val e the button allows you to add flights e the button removes flights from the list e the a button allows you to see the complete flight path in 3D e button allows to export your flight information to other processing software packages e the button launches the Stretchout processing module e the d button allows you to upload your project to the Pix4D Cloud If available you may return to the primary toolbar by clicking at any time 4 2 Opening Screen Toolbar Using the Buttons 4 2 1 Add flight Clicking on the toolbar allows you to indicate the location of the log files and the images that need to be synchronized The log files contain image acquisition information such as the position and orientation of the X100 These files can be stored anywhere on your local external or network drives and log files from different flights do not need to be stored together or in a common directory After you click use the LOG FILE button to indicate the location of the file of the flight you want to add The format of the log file is logyyyymmdd_hhmmss txt Next the FLY FILE button allows you to select the corresponding file The format of the fly file is logyyyymmdd_hhmmss fly Finally the IMG DIR button will prompt you to select the folder containing the images Click on the folder once to highlight it and then choo
26. view 12 Software Manual Stretchout Version 1 2 4 2 5 Export Select a flight and click the button to bring up the options to export a flight for processing in other compatible software packages Clicking AgiSoft PhotoScan will create a flightname psz file and display a link to the file in the toolbar Clicking Pix4UAV Gatewing Edition formerly Known as Stretchout Pro creates a flightname p4d file and displays a link to the file in the toolbar The EnsoMosaic2 button creates both flightname trp flightname gps file Also a link to these files is displayed in the toolbar A warning message appears when the EnsoMOSAIC export is selected reminding users to enter the path to the calibration file of the camera used for this particular flight in the corresponding field of the created TRP file which can be done in any text editor Clicking Generic will create a flightname csv file and display a link to the file in the toolbar This file contains the image positions GPS X Y Z and orientations UAV roll pitch yaw as recorded in the aircraft log file All export files are by default created in the same folder as the LOG file Please refer to the user manual of the software packages supported in the Export function for information on how to use the exported files 1 PhotoScan is a product of AgiSoft LLC http Awww agisoft ru products photoscan professional 2 EnsoMOSAIC is a product of MosaicMill Oy http
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