Making and Using Masks in ImagesPlus Save As Then Copy Mask
Contents
1. Gaussian C Quentle C Adaptive Median Mati wi j Medien Strength f1 Image Select Black Mictone White Min Apply a Mex Apply 0 Feather Range LF 0 50 0 Filter Strength Reset Apply Lock Image Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks mages NGC6888 HaNIlOlll AreaMask_2 fit 1104 x 820 100 691 89 L 7519 29 29 29 Press the Area Mask toolbar button to create the area mask and open the smoothing tool to allow customization of the mask Step 3 a ImagesPlus O 2 a ma mm Hl LF 1 lo ie alalal inctions ew Geometric St E aaoo E NGC6888 HaNIIOIll jpg RGB 100 NGC6888 HaNIlOlll AreaMask_2 fit Gray 100 a wl el Smoothing amp Noise Reduction NGC6888 HaNIIOll 7 Nonadaptive Fitters Adaptive Detail Preserving Filters C Box C Selected Neighborhood Blur Window Size Binomial C Absolute Difference 5 a 2 A 101x101 H Gaussian C Quantile C Adaptive Median x C Medien Strength i EZ Image Select Black Midtone ER Min Apply IN Mex Apply 0 Feather Range 0 Filter Strength CAVC 2012 ImagesPlus HandBook MakingAndUsinaiass ages NGC6888 HaNllOlll AreaMask_2 fit 1104 x 820 100 1093 177 L 9402 36 36 36 The Filter Strength slider was moved towards the left to include a little more detail in the nebula and some stars The strength of the smoothing is changed by2. Gaussian C Quanile C Adaptive Median Lats Spength 1 Midtone Image Select Black Min Apply mo 11897 0 20000 Feather Range oo 1853 0 50 100 J M Max Apply inne Black Blend White Reveal Epa E 65535 0 Eilter Strength Reset p Level fi Mask Type Reset Mask a el Lockimege Done Display mask a e Awy Apply uid CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks mages NGC7000 3 fit 3126 x 2304 35 3106 872 L 34331 134 134 134 Paste the inverse luminance mask saved in step 4 to the Mask Surface window of the Smoothing entry in the Process History list The inverse luminance mask restrict smoothing to just the dark areas of the image The Min Apply Max Apply and Feather Range sliders on the Smoothing amp Noise Reduction tool can be used to add additional control to where smoothing is applied In step 6 above Max Apply was set to 11897 with a Feather Radius of 1853 So the smoothing is only applied where the mask is dark and only at pixel values in the image that are less than 11897 1853 ad Figure 10 Final image after dark area smoothing The Area Mask toolbar option is used to create a single channel grayscale mask from a color or monochrome image and apply a large Gaussian blur to the mask so that detail is removed and only the bright and dark areas remain The Gaussian blur can be tailored to in
3. cj 8 8 je a ROG EEL O o o fal NGC6888 HaNIIOIIl jpg RGB 100 n pi R i SelectivesColor Mask Button 5 s Selective Color Mask NGC6888 HaNIIOIlljpg RGB LS Constraint Luminance vv V Select Hue From Image All Colors lalm sia Black White i Min L Min L Feather f Max L Max L Feather i Mask Level Smooth Radius Invert Mask Lock Image ToAll Images V Enable Sliders C lmages NGC6888 HaNIlOlll jpg j k 1104 x 820 100 1092 476 L 2212 86 60 59 Open the image and the Selective Color Mask tool using its toolbar button Check the Select Hue From Image box then left click on the blue in the nebula that you want to modify The blue range is set on the hue range bar and only pixels in the blue range are shown in the grayscale image ImagesPlus ile s Special Functions perato O Gl x x S i e e gt ia t 8 m 2jaj aja aS 5 0 0 DOO NGC6888 HaNIlOlll jpg RGB 100 el Selective Color Mask NGC6888 HaNIIOIII jpg 4 mjm sja Invert Mask Lock Image Reset Reset All z ave As Copy Mask via To All imags V Enable Sliders Apply Done CA lmages NGC6888 HaNIlOlll jpg 104 x 820 100 817 290 L 21344 83 83 83 After you left click on the nebula to select the blue range the hue range triangles are set and the grayscale image that represents the blue
4. gt gt Hue S stuiationuminance Colt Mode Lab Currerk Color Channel AI Cobiss ll Colors Hue Shit 0 00000 Saturabon 0 51200 Ee Saturation Factor 1 00000 Luminance 0 00000 I nin enn Canin 1 MMN E i lt gt Bland Mode z z x Normal j Opacity i E Oe A 1 000 Mask Repiocess Commands Fiom Current gt gt CECE C Imeges NGO6888 HaNIOII L Mask_SlueCrescent fit Hue Saturation Luminance NGC6888 HaNIIOIll jpg a al 5 s o lalm se 55 Copy Mask Paste Mask Mop To SE Oo Map From EE f Hue 0 00 000 Saturation 0 51200 i Preset Mask Black Blend White Reveal Luminance 0 00000 KOA N A KAS t Reveal A Mask Level l 6 Sore 7 i e Slider Sensitwity LebMode f SalectHue From image all Colors aa Mask Control Point Mask Type Saturation Luminance ae C Reset Mask 100x j 1 00x v v Enable Sliders f Lockimage Reset Apply AOO Orr E ges 7 Use Mask 4 To Allmage Reset All Done ie Display Mask Load C mages NGC6888 HaNIlOlll jpg 1104 x 820 100 1102 491 L 7710 30 17 11 The blue mask will remain the active system mask for filters applied to the image until the mask is replaced with a new mask or no mask The Hue Saturation Luminance tool is used with the blue mask to increase saturation of the blue area of the nebula ImagesPlus 0 a special Func et EEE EA AR 5 2 lt lt fe 1
5. j Ee Pie aiid r oaia s Last Save Copy As Name i x E sucht ainaka Save As Pork Text Done Bl i Pixel Radius i 161 x 161 EI Lock Image Apply Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Ilmages NGC7000 bmp 3126 x 2304 37 The high pass contrast sharpened image from Figure 15 is used as the starting point for creating the threshold mask ImagesPlus 5 File 5 t Operation pecial Functions View Geometric Stretch Smooth Sharpen 0l0 Modeling pen images pen Operators eip O 5 a x x m mmm m ole ol ejaj aja als e 8 0 0 9 9 o e NGC7000 bmp RGB 35 Process History NGC7000 bmp Operation Parameters ead Previous Image Fie CWC 2012 magesPlus Handa High Pass Current Image Fie gt gt Threshold Threshold Point 29613 Reprocess Commands From Cumerk gt gt Show and Set Fiter Window on Undo Redo Double click Delete Progect Last Save Copy As Name SevedAs HighPoss F bmp Pint Text Done hreshold NGC7000 bmp RGB 35 To All Images CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks mages NGC7000 bmp 3126 x 2304 35 3098 1781 L 0 0 0 0 The Threshold tool is opened using its toolbar button then applied tq the image The threshold slider is adjusted to make the highlights of the nebula white Threshold is added to the process history list of the image and can be deleted when finished to restore th
6. lt Delete Blend Mode Nama Reprocess Commands From Cutrent gt gt User Comment Show and Set Fiker Window on Undo Redo Doubleclick Delete Project Last Seve Copy As Name Save As HighPassF bmp Erin Tort Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 9 bmp 3126 x 2304 35 Select Threshold and Smooth in the process history list then left click on the selection and use Delete to remove the two commands from the history list and restore the initial image ImagesPlus amp File image Set cial Function Geome fon mm wml Lm el om oie alain S S 0 0 9 9 9 a oth sharpen Process History NGC7000 10 bmp Operation Parameters Read Previous Image Fie CWC 201 2 imagesPlus Hand gt gt High Pass Current Image Fie CWC 201 2 magesPlus Hand co Poel Aadus 80 lt gt Blend Mode 0 Soltlighh _v Opacty Reprocess Commands From Cumert gt gt User Comment a S Show and Set Fiter Window on Undo Redo Double click Delete Project Last Save Copy As Name Saves ThresholdF bmo Pint Text Done lamaja 18 2 a al al 8 Wonk Bsa aioe Ed als CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks mages NGC7000 10 bmp 3126 x 2304 35 1566 2003 L 15677 61 61 61 Threshold and Smooth were removed from the history list and the high pass contrast sharpened image is restored U et D O
7. x S e gt ajt E m a ajajaja a O ojo o o Process History NGC7000 9 L Mask_1 fit Operation Parameters gt gt New Imaga Previous Imaga Fie C VC 2012NmagesPhis Handa Curent Image File CAVC 201 2MimagesPlus HandBoo NGC7000 bmp RGB 35 NGC7000 9 L Mask_1 fit Gray 35 lt Blend Mode Now Rleprocess Commands From Curent gt gt User Comment V Show and Set Fiker Window on Undo Redo Doubleclick Delete Project Last Seve Copy As Name Save As Brint Tort Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 9 L Mask_1 fit 3126 x 2304 35 3035 263 L 65535 255 255 255 The smoothed threshold mask is a 3 channel RGB image so apply the Luminance Mask toolbar option to convert to a single channel grayscale image that can be used as a mask g ImagesPlus Process History NGC7000 9 L Mask_1 fit 5 a mmm wl ml we 2m 8 8 8 S 0 0 0 0 a Operation Parameters gt gt New Imaga Previous Image Fie C YC 2012 magesPhlis KancB Curent Image File CAVC 201 2 imagesPlus HandBoo g NGC7000 bmp RGB 35 o NGC7000 9 L Mask_1 fit Gray 35 lt gt lt gt Blend Mode O 50 100 Noma Opacity 1 000 EJ From Curent gt gt o V Show and Set Fiker Window on Undo Redo Doubleclick Delete Lo as el sl Save Copy As
8. 0 9 ay NGC6888 HaNIIOlIL jpg RGB 100 Custom Luminance Mask NGC6888 HaNII Luminance Parameters Bed Geen mm wa a Blue Gamma mage Select Black Midtone inet i oa i Mint Cikk LJEN Min LFeather _ f i E Smooth Radius InvertMask To Al Images Save As Copy Mask 7 Enable Sliders Lock image Apply Done CAlmages NGC6888 HaNIIOIll jpg 1104 x 820 100 681 54 L 7635 29 29 29 Move the Max L slider toward the left to exclude the red part of the nebula Step 5 s imagesPlus 0 al Functions erators elp x oO l ld ts oie 8 8 8 8 S O o 5 9 ay NGC6888 HaNllOlll jpg RGB 100 Custom Luminance Mask NGC6888 HaNIl Luminance Parameters Red Green Lo wl S Blue Gamma mage Select Black Midtone et tet Mint I Cika ki Min LFeat er _ M Mexl Mox L Feather Smooth Radius Invern Mask To All Images Save As Copy Mask Reset Enable Sliders Lock Image Apply Done C lmages NGC6888 HaNIIOlll jpa 1104 x 820 100 Adjust the Smooth Radius to help blend the black edges into the grayscale mask Step 6 Oy ImagesPlus ecial Functions View eometric Stretch Smooth Sharpen Color Modeling Open Images pen JECRROLDOCOODEECEDERELEEENOAOLELECERMNAODE NGC6888 HaNIIOIll
9. C Median Strength 1 Image Select Black Midtone Min Apply ji Max Apply a a a a i 65535 0 _ Feather Range 0 50 Fitter Strength CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Ilmages NGC7000 3 fit 3126 x 2304 35 3101 858 L 33641 131 131 131 Apply the Smooth Sharpen Standard Smoothing amp Noise Reduction filter to the image ZASE Process History NGC7000 3 fit 9 File image Set C Functio ew Geometric etch Smooth Sharpen Colo deling Openimages Open Operato Heip e a a a n A o a a a e a e hea TEE REE e e eo Tl Opsration Parameters D ajxjx a amp TT gt S 2 J R i e aJa ajali Bio oojojofa HI Read Previous Image Fle CVC 2012NmagesPlus Handb Image Sge Curent Image File Digtal Devalbpmeart Type Gaussian Fites z gt gt Smoothing File Stengh 1 00000 NGC7000 fit Gray 35 2 Window Size 15x 15 Apply Min 0 Apoly Max 11897 Feather Range 1853 lt gt lt gt Blend Mode o 50 10 Normal Opa oh PEA Hie tee 8 1000 Mask Rlereoness Commands From Minerk gt gt Reena Mask Surface NGC7000 fit Gray 35 C VC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 3 INV L Mask fit Smoothing amp Noise Reduction NGC7000 fit Gray T Nonadaptive Filters Adaptive Deter Preserving Filters C Bo Selected Neighborhood Box cs Blur Window Size C Binomial C Absolute Difference
10. For convenience the Selective Color Mask and Custom Luminance Mask tools have the Gaussian blur option built it A detailed description of the Smoothing amp Noise Reduction tool can be found in the Smoothing and Sharpening chapter of the ImagesPlus user guide High Pass Filter The High Pass Filter toolbar option is used to create a high pass or detail only version of a color or monochrome image The high pass version of the image is used to increase contrast and sharpness of the initial image by layering the high pass image on top of the initial image using soft light overlay or screen blend mode Opacity of the top high pass layer is adjusted to vary the strength of the contrast and sharpening effect Lock Image Done Figure 14 High Pass Filter with pixel radius of 20 or a 41x41 blur window The Pixel Radius slider is used to set the size of the blur window A pixel radius of N specifies a blur window kernel size of 2N 1 x 2N 1 A small pixel radius creates a high pass image with only very fine detail Increasing the pixel radius includes more of the large scale image structure along with the fine detail If Lock Image is checked when the tool is applied to an image then the tool will always be applied to the same image until the image is closed or Lock Image is unchecked This option is used to apply the tool to the same image without selecting the image when multiple images are open The Cancel button is used to stop the
11. Minimize All Apply Flatten CAVC 2012 ImagesPius HandBook MakingAndUsingMasks Images LuminanceSharpen_1 fit 1104 x 820 65 Open the Combine Images tool and use the initial color image as the bottom layer Use the luminance mask image as the top layer with Luminosity blend mode Step 4 ee _ ecial Functions Ole E NGc6ses HaNliolll L Mask_1 fit Gray 50 2 2la alajalaisieioiolololol m Multiresolution Smooth Sharp NGC6888 HaNIIONI L Resolution Level Smooth No Change Sherpen i i f Finest 37 8900 Reset wa A toh a Goin a a cg nk A Fine 11 7000 Reset a i n P i 2 oe ae bone a nets Medium 0 0 Reset Large 0 Reset Largest 0 Reset Darker Lighter Background 00 Reset Image Select Black Midtone White fo MinApply f oO NGC6888 HaNIlOlll jpg RGB 50 Mex Apply _ pss Feather Range Sharpen Slider Strength f Finest C Yery Fine Fine C Medium C Strong Apply Reduce Aritacts v Lock Image Enable Sliders T ToAllimeges Raset All Done g7 Z cOoa gAndUsingMasks mages NGC6888 HaNIlOlll L Mask_1 fit 1104 x 820 50 Minimize the combination image and Combine Images tool Left click on the luminance image to make it the active image then open a sharpening tool Check the Lock Image box then apply the sharpening tool to the luminance image The application of the sharpening tool is locked to the
12. increasing or decreasing the Blur Window Size A blur window size of N x N has a pixel radius of A feathered luminance range can be set on the smoothing tool using the Min Apply Max Apply and Feather Range sliders Step 4 ImagesPlus 0 inctions ew Geometric Stretch Smooth Sh armen Colo Modeling pen Images Nen ne a me mm Bl 1 oe i ie elas SSO o 9 NGC6888 HaNIIOIll jpg RGB 100 NGC6888 HaNIlOlll AreaMask_2 fit Gray 100 Save As Then come b Save Copy As MakingAndUsingMasks gt Images Organize v New folder Recent places A Homegrou P ae Blur Window Size 101x101 z As This PC NGC6888 HaNIIO NGC6888 HaNIIO NGC6888 HaNIIO NGC6888 HaNilO Desktop lil AreaMask_1 fit itl AreaMask_2 fit WiFilter 1 fit NiFilter 2 fit F Documents J Downloads I Music amp Pictures B Videos Local Disk C NGC6888 HaNIIO NGC6888 HaNIIO NGC7000 3 INV NGC7000 fit lllFikter 3 fit lllFilter 4 fit L Mask fit File name Save as type FIT fit fts fits a Hide Folders Cancel Pp Loc mage CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC6888 HaNlIOlll AreaMask_2 fit 1104 x 820 100 Press the Save As Then Copy Mask toolbar button to name and save the mask for use with a filter Step 5 a ImagesPlus D insae Set Onerations Speci Raion View Gromek Stretch Sinai hammer Cot Modeling Ogen imanes Ra SE SS Proce
13. luminance image Step 5 oO unctions Ole NGc6sss HaNliolll L Mask_1 fit Gray 50 2 LuminanceSharpen_1 fit RGB 65 fo eae Combine Images LuminanceSharpen_1 fit gt E NGC688E HaNIOIl po 2 NGC6888 HaNIIOIIL jpg RGB 50 Combine Images By C Addition C Average Weight C Median C Min C Max Blend Opacity and Mask Blend Mode Luminosity x 4 Opacity 4 1 000 Source Image Steck Order Source Image Y Addimege V Use Image R A Add Mask E i 2 By Pixel Fan l gt j 1 Top T Delete Image R ma z 2e E oemel ca see Bottom E3 Display Combination Image Minimize Al Flatten CAVC 2012 ImagesPlus HandBook Makin NV s LuminanceSharpen_1 fit 1104 x 820 65 613 430 L 13926 54 35 32 Restore the Combine Images tool using the Open Operators main menu Press Apply to rebuild color image using the sharpened luminance image Step 6 oO ImagesPlus inctions Geometric tretch Smooth Sharpen Ole E NGc6ses HaNliolll L Mask_1 fit Gray 50 2 2 ajajaja Hagon o of a A ah Mask 1 fi me E NGc6888 HaNIIOlll EdgeMask_1 fit Gray 5 Edge Extraction NGC6888 HaNIIOIlI Standerd Edge Extractors C One Pixel C Sobel C Laplace C Morphological Better Edge Extractors g e a Deriche C Contra harmanic Edge Width Value Window A Se 1240 ez Threshold Binerization S
14. range is displayed Step 2 o ImagesPlus 8 ile mage pen p O Gl x x 6 m B lalt 8 m 2 a ola a B O O 0 o o gt e NGC6888 HaNIlOlll jpg RGB 100 le Feather Range Hue Range Selective Color Mask a 19 Hue Range L S Constraint Black Min L Feather Max L Max L Feather Mask Leve Smooth Radius Invert Mask Lock Image at Reti Save As Copy Mask Apply Done To All Images v Enable Sliders C Images NGC6888 HaNllOlll jpg 1104 x 820 100 1103 455 L 0 0 0 0 Left click on or between the hue or feather range triangles and drag them to adjust the hue and feather range to include more or less of the hue range imagesPlus 4 O Gt x x S ee la t 8 m 2 a a a al a G O O o ojo Ej a ca E 2 a a F Selective Color Mask NGC6888 HaNIIOIII jpg 4 w LS Constraint fLuminance v Cyans AEREN Black Mdtone White Min L Feather Max L Max L Feather Mask Leve Smooth Radius Invert Mask Lock Image Reset Reset All Save As Copy Mask Apply Done To All Images v Enable Sliders C lmages NGC6888 HaNIlOlll jpg 1104 x 820 100 1085 506 L 0 0 0 0 Use the Mask Level slider to make the mask brighter or darker to control selection and blending imagesPlus aoe a ecial pen Operators 5 x jeje mmm wm 2 ale fe
15. the same image until the image is closed or Lock Image is unchecked This option is used to apply the tool to the same image without selecting the image when multiple images are open The Histogram button is used to refresh the histogram of the current active image Apply is used to apply the current setting to the current image Moving the threshold slider also applies the Threshold tool to the current active image Press Done or the X at the top right of the tool to close the tool Example The threshold tool will be used to create a threshold mask of the high pass contrast sharpened image from the high pass filter example shown in Figure 15 The threshold mask is smoothed to improve its blending capability then the mask is used with Histogram contrast to adjust the highlights with no change to the dark areas of the image Step 1 a ImagesPlus 6 age ecia INCHONS om Sharpen Color Modeling fe mm l 1 all ole ole 3 s q a S o o a ra NGC7000 bmp RGB 37 w Process History NGC7000 bmp I Parameters a Prewous Image File CAVC 201 2lmagesPlus HendB Currert Image File CVC 201 2 imagesPius HandBoo Sed Pixel Radius 80 hed gt A Blend Mode 0 0 100 sai E omen OOO S noo a o Reprocess Commands From Current gt gt isek Condemns F ee T V Show and Set Fiter Window on Undo Redo Double click Delete gt EN K Project
16. 26 x 2304 35 3046 669 L 35723 139 139 139 Apply the Histogram Contrast Stretch tool to increase the highlights The entire image is processed by Histogram Contrast Stretch since no mask is assigned to it oO ImagesPlus TAEA RIET E s z Ea 3 Process History NGC7000 10 bmp e iage Set Operations Special Functions View Geometric retch nooth Sharpen Color Modeling Openimages Open Operators Help C x Ww wl a el alala mle paration Parameters al D z a3 x m em fa val val acd a a 9 5 0 oO 0 2j a m Read Previous Image Fle CAVC 201 2 imagesPlus Handb i High Pass Current Image File j gt gt Hivtogiam Contrast Stretch Apply to Red Green Bue Type Unetorm Scale 0 2230 Hightght Secate 0 1000 Highight Break 0 0000 Background Seale 01000 Background Break 1 0000 lt gt lt gt Blend Mode te 50 100 Noma a a Se Si ee 1 009 _ Mask Mask Surface NGC7000 10 bmp oO C VC 2012 ImagesPius HandBook MakingAndUsingMasks Images NGC7000 9 L Mask_Threshold fit Lo alal Lalm aim elal Histogram Modification Type Uniform C Bayleigh C Hyperbolic C Logarithmic C Beckground Highlight Contrast C Exponential Brightness Highlight Brightness Ar Contrast i CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks lmages NGC7000 10 bmp Rackerniind Open the Proc
17. 4 x 820 100 Restore the image by deleting the Selective Color Mask entry in the Process History list You could also use Undo from the toolbar but the Selective Color Mask entry will not be deleted from the history list Step 9 oO ImagesPlus 0B e mage Set Operations 3 inctions Viev Geometric tretch mooth Sharpen Colo Modeling ne mages pen serators alp JECRRODLOCOOOEECHHELELEEENOAOEELEEERMAGOoE T NGC6888 HaNlIOlll jpg RGB 100 a LJ LJ a my s lc Micro Curves NGC6888 HaNIIO 65535 0 tlam 3 6 1 SS Min 0 0 Mid 32767 0 Max 65535 0 Prasat Curve Default Channel RGB i Image Select MinApply MaxApply Range Black Midtone White t LebMode f ToAlllmages Reset Reset Al Lockimage JV Enable Drawing Apply Done C mages NGC6888 HaNIlOllljpg 1104 x 820 100 1100 369 L 7196 28 17 13 To use the blue mask first apply a filter to the image In the case Micro Curves is applied to the restored image Step 10 o ImagesPlus m FR NRE SES TE ELI PS ERLE AY SN Sa aner Ce Modane Onen PY Oar DLS ERTS Process History NGC6888 HaNIIOIl jpg C1 co td x x E LIL gt iw t m 2 jm ala a 9 5 0 0 O o o a Operation i LT Read Pressous Image File C mages NGCB388 HaN IDI gt Micio Curves Cuirert Image Fie NGC6888 HaNlIOlll jpg RGB 100
18. 5 0 20 or greater than 0 95 0 75 0 20 are not used by the mask and the pixels are set to 0 or black in the mask Note that a pixel must satisfy the feathered hue feathered luminance and feathered saturation range constraints to be included in the mask Otherwise the pixel in the mask is set to black so that the pixel is not used when the mask is applied Mask Brightness Level Adjustment The Mask Level slider is used to adjust the brightness of the mask Brighter mask areas select more of the layer that the mask is applied to while darker mask areas reveal more of the layer before the current image layer Smoothing the Mask to Improve Blending The Smooth Radius slider is used to apply a Gaussian blur to the mask to improve blending The larger the radius the greater smoothing A very large smoothing radius can be applied to the mask quickly especially if GPU acceleration is enable in File System Options Inverse Luminance Mask The Invert Mask check box is used to convert the custom luminance mask into an inverse luminance mask After the custom luminance mask parameters are set use the Save As Copy Mask button to name and save the mask to your hard drive The mask is also made available for a paste operation in the Mask Surface window of a filter applied to an image in the Process History list The Save As Copy Mask button first converts a grayscale mask to a single channel grayscale mask if necessary then performs the Same opera
19. 5 6 1 CAVC 2012 ImagesPius HandBook MakingAndUsingMasks mages NGC6888 HaNIlOliLjpg 1104 x 820 100 The initial image before sharpening luminance with an edge mask _ Step 2 o ImagesPlus M JECERHOLOCOOOEECEEEGECEEEOOUHOLCERREERMOAHHE NGC6888 HaNIllOlll jpg RGB 100 NGC6888 HaNllOlll L Mask_1 fit Gray 100 ala ele sl 5 6 gt d lal a CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC6888 HaNilOlil L Mask_1 fit__ 1104 x 820 100 Press the Luminance Mask toolbar button to create a single channel luminance mask of the color image Step 3 ImagesPlus _ e mage Set Operations pecia inctions e eometric tretch mooth Sharpen olo odelinc pen Images pen Operators elp O x x a ql Sls wit B 2 a aja ala e S O 0 o o E NGC6888 HaNIlOlll L Mask_1 fit Gray 50 LuminanceSharpen_1 fit RGB 65 Lo as el ol Combine Images LuminanceSharpen_1 fit BB NGC5e88 HeNIOII jpg mmj sja 2 NGC6888 HaNIIOIILjpg RGB 50 Combine images By N A sta 3 C Addition C Average Weight C Median C Min C Mex y Blend Opacity and Mask Blend Mode Luminosity X Opacity 1 000 Source Image Stack Order Source Image X Y M Addimage V Use lmage Add Mask I ne MEE yra a apa Top t Delete Imaga Y 0 ae t amp Bottom 4 xl m E Display Combination Image
20. 8 ie alae S S 1010 5 1 ay NGC6888 HaNIIOlil jpg RGB 80 e a w m a si k j lalale L lel a s m C mages NGC6888 HaNIlOlll jpg 1104 x 820 80 757 816 L 11565 45 20 15 Initial image before blue enhancement is shown on the left with blue mask enhanced version on the right invert Mask The Invert Mask toolbar button is used to convert an image to its negative image The invert or negative of a luminance mask is called an inverse luminance mask A luminance mask is used to target the midtone to highlights of an image when applied with a smoothing sharpening stretch or color adjustment filter Inverse luminance masks target the dark to midtone regions of an image when used with a filter Figure 9 shows a comparison of an image with its luminance and inverse luminance masks ImagesPlus 4 e mage Set perations Special Functions View Geometric tretcn mooth Sharpen Colo odelina pen Images pen Operators Help 0 5 e x x m mmm mj gt lei ejm ejaj 8 9 a 9 2 5 0 0 9 5 5 e j a NGC6888 HaNIIlOlll jpg RGB 50 E NGC6888 HaNliOlli L Mask_4 fit Gray 50 a m al 3 6 Lo a 5 4 m Initial Image Luminance Mask Inverse Luminance Mask C Images NGC6888 HaNllOlll L Mask_4 fit 1104 x 820 50 169 795 L 56797 221 221 221 Figure 9 A luminance mask targets the midtone to highligts while an inverse luminan
21. 88 HaNIlONI 8 jpg 1104 x 820 80 Initial image is shown on the left Micro Curves and saturation increase with area mask is on the right Edge Mask The Edge Mask toolbar option is used to create a single channel grayscale mask from a color or monochrome image and apply an edge extracting filter to the mask Standard Edge Extractors C Sobel C Kirsch C Laplace C Morphological Better Edge Extractors C Deriche C Contra harmonic Edge Width Value Window Threshold Binarization Scale Brightness Scale ee 7 0100 V Enable Sliders Locklmage Apply ace To All Images Edge extraction tool The quality of the edge mask is set by choosing the One Pixel Sobel Kirsch Laplace Morphological Deriche or Contra harmonic option The Deriche and Contra harmonic edge options allow you to modify edge width The Brightness Scale slider is use last to set the brightness of the mask The edge tool is explained in detail under the Edge Extraction section of the Smoothing amp Sharpening Tool chapter of the ImagesPlus user manual Example The edge mask can be used to sharpen the luminance of an image Step 1 oO ImagesPlus Op File Image Set Operations Special Functions View Geometric Stretch Smooth Sharpen Color Modeling Openimages Open Operators Help fs ea x lt a m mmm m gt ie lm ejaj ajajajaja a a NGC6888 HaNllOlll jpg RGB 100 a sjm el sai
22. HaNll Luminance Parameters almsa i t gt ee Gamma _ _ Image Select Black Mictone Mink 2 Min L Feather _ i 000 MaxL Max L Feather Smooth Radius f inert Mask ToAllimages Save As Copy Mask V Enable Sliders Lock Image Se C lmage NGC6888 HaNIOIN jpg 1104 x 820 70 __ 1092 306 L 4404 17 17 17 Press the Custom Luminance Mask toolbar button to duplicate and convert the color image to grayscale Step 2 ee e ma Pecia INCHONS 2 6 x x ee mmm 11 ml elle oie 818 8 S S 0 0 9 D E S T NGC6888 HaNIIOlll jpg RGB 100 o B N cy Custom Luminance Mask NGC6888 HaNIl Luminance Parameters on 4 m Red ad gt Tal reer Blue Gamme F mage Select Black Mint 2 a ee a ee hun A La 6 6 L gt Bal Max L Feather al al itt Smooth Radius InvertMask ToAlllmages Save As Copy Mask Reset 7 Enable Sliders Lockimage Apply Done C lmages NGC6888 HaNIlOlll jpg 1104 x 820 100 Move the red slider to the right to increase the contribution of red to the grayscale mask Step 3 oO ImagesPlus B e image Set Operations Special Functions View Geometric Stretch Smooth Sharpen Color Modeling penimages Open Operators Help Ol ea x
23. High Pass filter when it is applied to a very large image Apply is used to apply the current setting to the current image Moving the Pixel Radius slider also applies the High Pass filter to the current active image Press Done or the X at the top right of the tool to close the tool Example In this example the High Pass filter is used to sharpen and add contrast to an image Step 1 a 6 OECEROO Dd 1 lle ee 818 8 8 3100 9 5 NGC7000 bmp RGB 37 ____ CAV 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 bmp 3126 x 2304 37 The final dark background smoothed i image from the invert mask example is used a as the initial image aa 2 TOSENN 0 1s we Dd 1 lle oe 818 8 8 2105 915 NGC7000 bmp RGB 37 eam a 3 o e a a 2 ele slo High Pass NGC7000 bmp RGB 37 i i Pixel Radius hh 81 163 x 163 cca Lock Image Apply Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks mages NGC7000 bmp 3126 x 2304 37 2934 534 L 37995 148 148 148 The High Pass filter is applied with a pixel radius of 81 Vary the pixel radius to show stars and also an outline of a nebula or galaxy Step 3 oO ImagesPlus amp AOR EO OCU Sec cee See Cac e ae NGC7000 bmp RGB 37 alle lt Prewous Image File CAVC 201 2lmagesPlus HandB Ourrert Image File CWC 201 2 imagesPius HandBoo Pixel
24. I cep el Te Cuve bd Black X 0 ra Black Y 0 White X 255 White Y 255 Bra Humber at Carteel Pointe 2 v i V 89 5 Blend Mode 0 SOx 100 n Normal Opacity i piper CO ike 1 000 Mask bal Repiocess Commands Fiom Cunent gt gt iises Comment 4 5 2 Te eel Micro Curves NGC6888 HaNIIO 65535 0 C Imeges NGC6888 HaNIOII L Mask_SlueCrescent fit Oh lt P Copy Mask Paste Mask lelalsii gt l a 915 Ss tS Min 0 0 Mid 32767 0 Max 65535 0 Preset Curve iy Default Channel RGB F A Image Select MinApply MaxApoly ange Black Midtone White Nees Preset Mask Black Blend White Reveal ae Flat Reveal A Mask Level amass n 6 Mask Control Point Mask Type Lab Mode To AYmages Beset Reget All e _Reset Mask Miar V Use Mask Display Mask Load Lockimage V neble Drawing Apply Done C lmages NGC6888 HaNIIOlll jpg 1104 x 820 100 To assign the blue mask to Micro Curves press the Mask button on Process History then right click on the mask area and select Paste Step 11 S ImagesPlus A OP TES aae F Ga TTT Process History NGC6888 HaNIOIlljpg inctions View Geometric tretch mootnh amen olo Modelina SEDGE OIL LL kee eos ee ea RS Tra e 7 Read Previous Image File images t Micro Curves Currert Image Fie C Ymages NGCES88 K ali DIll NGC6888 HaNIlOlll jpg RGB 100 0O
25. IOllI L Mask 3 fit Press the Luminance Mask toolbar button to convert from a 3 channel RGB grayscale image to a single channel gray scale mask You could also use the Save As Copy Mask button on Selective Color Mask to do this step and step 7 Step 7 o ImagesPlus ile Image Set O G x x S m gt 5 5 lalt 8 2 m a 4 a a 0 0 oO 0 6 Lee ee a Save Copy As mjm sja Local Disk C Images gt i Wavelet i Wally Art amp vic Sun amp SC i RogerClark d Rick E Dadiani Nietartinn File name NGC6888 HaNIIOlll L Mask_BlueCrescent Save as type FIT fit fts fits Hide Folders Save Cancel C Images NGC6888 HaNllOlll L Mask_Afit 1104 x 820 100 HaNIIOIII L Mask 3 fit Press the Save As Then Copy Mask toolbar button to name the blue luminance mask and make it available for use with a filter in the Process History list Step 8 e ASEN 6 ee a fe mm ltl ee 3 38 SOOO 8 9 a fl kal NGC6888 HaNIlOlll jpg RGB 100 Process History NGC6888 HaNIlIOlll jpg n E Parameters A hed Prova Image Fie C images NGCS898H anil B File m m CE V Show and Set Fiker Window on Undo Redo Double click Delle Last Save Copy As Name t a Print Text Done 3 Right click and select Delete to remove Selective Color Mask C lmages NGC6888 HaNIlOlll jpg 110
26. Preset Mask lack Blend White Reveal 65535 0 Mask Controf Point Separate Pints zji Reset Mask G V Use Mak y Display Mask Load Apply aa Sa Open the Process History list using its toolbar button and note that Histogram Contrast Stretch is the current filter in the list Press the Mask button on Process History then left click on the mask area of the Mask Surface window and select Paste The mask is assigned to the Histogram Contrast Stretch and restricts the stretch to the brighter areas of the mask Enable Slider ToAllimages Lock ImagesPlus 5 5 fae mmm wlll 12 wel om em sla a S O 0 0 0 a NGC6888 HaNIIOlll jpg RGB 80 e ss eee sl Lo a 5 4 gt a 5 6 L 5 ga o con H EN i 1104 x 820 80 The initial color image is shown on the left and the mask stretched image with increased blue is shown on the right Selective Color Luminance Mask The Selective Color Luminance Mask toolbar option is used to create a luminance mask from a color image by selecting a hue saturation and luminance range A feathered hue range can be selected from the spectrum bar A feathered min to max luminance range can be used to select only dark midtone or highlight areas of the image A feathered min to max saturation range can be used to select low intermediate or high saturation areas of the image A pixel must satisfy the hue saturation and luminance co
27. Radius 80 p Reprocess Commands From Curent gt gt gt Leat Comment Project Last Save Copy As Name Saveds Pixel radius Opacity Lol al o 4 lall alm elal e a alae Pixel Radius 161 x 161 Lock Image Apply Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 bmp 3126 x 2304 37 Open the Process History window and set Soft Light Blend mode Adjust the high pass pixel radius and opacity to fine adjust the contrast and sharpening increase Figure 15 Image after high pass contrast sharpening Threshold The Threshold toolbar option is used to create a binary or black and white image with no gray shades The threshold image is usually used as a mask after it has been smoothed using the Smoothing amp Noise Reduction tool Bee M ToAllimages Locklmage Apply Hi Figure 16 Threshold set to its default position of 32768 The threshold slider is used to set the threshold between black and white pixels Pixel values that are less than the threshold value are set to 0 0 or black Pixels with a value greater than or equal to the threshold value are set to white or 65535 0 The course and fine arrow buttons are used to adjust the threshold value by small amounts in the direction of the arrow If To All Images is checked then the Threshold tool is applies to all open images If Lock Image is checked when the tool is applied to an image then the tool will always be applied to
28. The Layers Blend Modes Opacity amp Masks chapter of the ImagesPlus user manual describes how a mask blends two images and also how a mask is assigned to an image using the Combine Images and Process History layer tools This chapter covers the use of the mask making tools in ImagesPlus to create luminance background hue and saturation range masks The mask tools in ImagesPlus are located on the left vertical toolbar shown in Figure 1 and also on the Special Functions Mask Tools main menu which appears when you open an image The mask tools are used to extract a single channel gray scale image from a color image or single channel gray scale image A hue saturation luminance range and edge detail mask can be created from a color image Only a luminance range and edge detail mask can be created from a gray scale image A mask can be customized further after extraction from a color on gray scale image by using the smoothing local painting curves pixel math or other image processing tool o ImagesPlus File Image Set Operations Open Operators Help Ojejmjx x aj m mmm m gt lel 8 me ejaj 8 9 a 9 2 68 0 0 9 5 9 a a Save As Then Copy Mask pa Luminance Mask Lab Luminance Mask Red channel Mask Green Channel Mask Blue Channel Mask Custom Luminance Mask Selective Color Luminance Mask Invert Mask Area Mask Edge Mask Feature Mask Smoothing Filters High Pass Filter Threshold L
29. a axle ain are ZEOT Onn EST nooo A D E NGC7000 fit Gray 35 E NGC7000 3 L Mask_1 fit Gray 37 Luminance Mask 2a Invert Mask oe amj N a aaa a a E CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 3 L Mask_1 fit 1 3120 X 2304 37 The Luminance Mask toolbar button is used to create a luminance mask then the Invert Mask toolbar button is applied to the mask to invert it and make the inverse luminance mask shown on the right a oO ImagesPlus image Set Oper S Special Funct ne mooth Sharpen Co i ng Open images en Operators File et Operation tions View Geometric Stretch S or Mode OF Ope e sal x x I E l sls 8 a Elm cle alala anano al lm O15 NGC7000 fit Gray 35 NGC7000 3 L Mask_1 fit Gray 35 Histogram Modificaton Type Uniform C Rayleigh C Hyperbolic C Logarithmic C Background Highlight Contrast C Exponential Brightness n 0 6610 Highlight BALL lol TIED fo ea a E Bnghtness 3 0 10 Contrast Background Brightness I Contrast V Enable Slider ToAllimages f Lockimage CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 3 L Mask_1 5 fit 3126 x 2304 35 Dark areas of the inverse mask are made even dark to reduce the effect of the mask on the light areas of the image that the mask is applied to with a smoothing filter ImagesPlus amp e mage Set Operatio
30. and feather size To select a hue range from an image check the Select Hue From Image box on Selective Color Mask then left click on the hue in the image The hue range will be set using the triangles under the color spectrum bar Left click on a triangle or between triangles and drag them to adjust the hue and feather range Hue Range Hue Feather Range black triangles eee gray triangles Hue Range w Luminance v Select Hue From Image Blues v Mdtone White LS Constraint List p e Min L Feather OO 2000 Max L 65535 Max L Feather 2000 Mask Level jh 0 000 Smooth Radius 3 Invert Mask Lock Im Reset Reset All worlds Bsa Save As Copy Mask ToAllImages V Enable Sliders Apply Done Figure 8 Blue hue range is selected and used for the mask Luminance Range Selection Select Luminance in the L S Constraint list to set the min max and feather range sliders to luminance mode Adjust the Min L Min L Feather Max L and Max L Feather sliders to select the dark midtone or highlight areas from the selected hue range Figure 8 above shows LS Constraint set to Luminance mode The Min L and Max L sliders define the luminance range min L value max L value where pixel luminance in the hue range is selected at 100 of its value The Min L and Max L Feather Range sliders are used to define the feather radius for pixel values less than the min L value and greater than the max L value Fo
31. cale Brightness Scale f 1 620 i Some en T ERAS Apply Done To Al Images ply _ Doe ga o i m Ea vVvoOo S NGC6888 HaNilOlll EdgeMask_1 fit 1104 x 820 50 Minimize the combination image and Combine Images tool Left click on the color image to make it the active image then press the Edge Mask toolbar button to create the edge mask Check the Lock Image box then apply the edge extraction tool to the edge mask image The application of the edge tool is locked to the edge mask image Step 7 oO inctions ImagesPlus 20 Dje NGC6888 HaNIlOlll L Mask_1 fit Gray 50 7 E E NGC6888 HaNllOlll EdgeMask_1fit Gray 5 O Combine Images LuminanceSharpen_1 fit 2 NGC688E HaNIIOllL Mesk_1fit Mask Enabled E NGcsa3s HaNIlOlll jpa g NGC6888 HaNIIOIIl jpg RGB 50 Combine Images By C Addition Average Weight C Median C Min Blend Opacity and Mask Blend Mode fi uminosity Opacity Source Image Stack Order Source Image X Y Addimage V Use Image x 0 R T A ee AddMask V Use Mask S Sel E m By Pixel E Eji Top t Delete image m Y 0 2d Pa L X Bottom Delete Mask gz a ws Display Combinatbon Image Mask Minimize All Apply Flatten CAVC 2012 ImagesPlus HandBook Makin M an E 1104 x 820 65 Add the edge mask as a mask to the top luminance layer Press Apply on Combine Images to rebuild the luminance sharpened color image The edge ma
32. ce mask targets the dark to midtone regions of the initial image Example In this example the dark area of the image with noise will be smoothed using an inverse luminance mask and luminance range set on the smoothing tool so that no change is made to the bright image areas with no noise You may need to zoom this document in a little to see the fine noise in the dark image area 1a 1 oe Eo 6 Special Func Geometric St Sharpen Color ng nima rato CERET T I ed ed ed l 2 OE falpial Risin ict aes iets i a a a be a J 2 o IF I NGC7000 fit Gray 35 Digital Development NGC7000 3 fit Pre Scale and Stretch Color and Sharpness HOR Pre Stretch Scale Exponent a 1 123 Black Point 0 00000 White Point SSN 1000 Black Point Range 0 0 0 100 aa Scale Function nth Power X n X DOP Swetch Value BkGd Min Po 0 BkGd Wt Break Point i HighLights BkGd Weight Range BreakPoint Range 0 000 1 25000 X 0 1000 x v Enable Sliders Lockimage Reset Scale Reset Stretch Apply Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 3 fit 1 3126 x 2304 35 __ 3086 875 _ L 33452 130 130 130 Digital Development is used to stretch the image Bright i image areas have little or no noise but the dark area near the center of the image has fine noise Step 2 oO faces ecial Func 5 Sharp Color deling Openim
33. clude more or less image detail in the mask The area mask can then be used to brighten darken smooth sharpen or adjust color of the image area targeted by the mask The smoothing tool is explained in detail under the Smoothing amp Noise Reduction section of the Smoothing amp Sharpening chapter of the ImagesPlus user manual In this example an area mask is created and used with Micro Curves to increase brightness of the nebula The area mask is then used with the Hue Saturation Luminance tool to increase saturation Step 1 e ImagesPlus Op File Image Set Operations Special Functions View Geometric Stretch Smooth Sharpen Color Modeling Openimages Open Operators Help ojsjmjx x aj m mmm mj gt 1 aie ejm ejaj ajajaja ajajnojoaja e e NGC6888 HaNllOlll jpg RGB 100 CAVC MES a h E S EE eet len E L A E aiast 100 The initial image before application of a filter with an area mask Step 2 o ImagesPlus E File 6 x x ee mm Bl ml 8d lel ie 8188 3 S 50 0 0 9 pecial Functions Vie eometric Stretch Smooth Sharp en olo Modeling pen Images pen NGC6888 HaNIIOIll jpg RGB 100 NGC6888 HaNIlOlll AreaMask_2 fit Gray 100 Area Mask Smoothing amp Noise Reduction NGC6888 HaNIIOIl T Nonadaptive Fitters Adaptive Detail Preserving Filters C Box C Selected Neighborhood Blur Window Size C Binomial C Absolute Difference n hoan gt
34. d Green and Blue sliders are not active and the monochrome image is used as the initial luminance mask The initial luminance mask generated by the Red Green and Blue sliders or a monochrome image is customized using the Gamma Min Max L luminance range selection Smooth Radius and Invert Mask options The Gamma slider is used to adjust brightness of the darker areas of the initial mask created from a color or monochrome image If gamma lt 1 0 then darker areas become darker If 1 0 lt gamma then darker areas of the mask become lighter Luminance Range Selection The dark midtone and highlight areas of the mask can be isolated using luminance range selection The Min L Min L Feather Max L and Max L Feather sliders are used to select a range of luminance values from the mask and set the remainder of the mask to black The slider can be adjusted manually or you can check the Min L or Max L box then left click on the mask to select the value The Min L Feather and Max L Feather sliders are used to soften the boundary of the luminance range The luminance range selected from the mask is given by Min L Min L Feather Max L Max L Feather Smoothing the Mask to Improve Blending The Smooth Radius slider is used to apply a Gaussian blur to the mask to improve blending The larger the radius the greater the smoothing A very large smoothing radius can be applied to the mask quickly especially if GPU acceleration is enable in File Syst
35. e image Step 3 a imagesPlus amp JEE 7 x T mn m ia t glal ala ala 5 0 o0 olola a Process History NGC7000 bmp Operation Parameters wee NGC7000 bmp RGB 35 hPa es ee CAVE 201 2NmagesPlus Handa Cure Threshold App to Red Green Bue gt gt Smoothing Type Gaussian Filter Fite Strength 1 00000 Window Size 41 x41 Apply Mn Appy Max 65535 Feather Aenge 0 lt gt lt gt Blend Mode ox 50 100 Noma v Opact _ 1 000 Mack Rleprocess Commands From Curent gt gt User Comment V Show and Set Fiker Window on Undo Redo Doubleclick Delete Project Last Seve Copy As Name Save As HighPassF bmp Err Tont Done Smoothing amp Noise Reduction NGC7000 bmp R Nonadaptive Filters Adaptive Detail Preserving Filters Box Selected Neighborhood is Blur Window Size C Binomial Absolute Difference a EIN E P 41x41 pr Gaussian Quantle C Adaptive Median C Median Strength Image Select Black Midtone White f i MinApply lie f Max Apply 65535 20000 Feather Range fo 50 100 i Filter Strength Reset Apply Lock Image Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 bmp 3126 x 2304 35 3089 1586 L 2538 9 9 9 The Smoothing amp Noise Reduction tool is applied to the image to improve blending of the mask Step 4 ImagesPlius O e Oh tl x
36. em Options Inverse Luminance Mask The Invert Mask check box is used to convert the custom luminance mask into an inverse luminance mask After the custom luminance mask parameters are set use the Save As Copy Mask button to name and save the mask to your hard drive The mask is also made available for a paste operation in the Mask Surface window of a filter applied to an image in the Process History list The Save As Copy Mask button first converts a grayscale mask to a single channel grayscale mask if necessary then performs the Same operation as the Save As Then Copy Mask button at the top of the left vertical toolbar Example The Custom Luminance Mask tool can be used to create a mask from a three channel RGB color image or a single channel monochrome image If the Custom Luminance Mask tool is applied to a three channel RGB color image then the three channel color RGB image is first duplicated and then converted to grayscale The grayscale image created is still a 3 channel color image with RGB in its window caption bar but R G B at each pixel so the image appears as a grayscale image If the three channel grayscale RGB image is to be used as a mask with the Combine Images tool then the Luminance Mask or Lab Luminance Mask toolbar option is applied to convert it to a single channel grayscale image before the mask is assigned to an image layer in the Combine Images layer tree If the three channel grayscale mask is to be used with a f
37. en blue cyan magenta or yellow in its top window caption bar Step 2 oO imagesPlus oO Oo ea x x a m mmm m fl aje Ejm ejaj ajajajaja a e E kda EE NGC6888 HaNIIOlll jpg RGB 65 n LJ z NGC6888 HaNllOlll Lab L Mask_3 fit Gray 65 S m k 5 6 15 Save Copy As lt Local Disk C Images gt all at Favorites A s E Desktop NGC6888 HaNIIOllI Lab L Mask_2 fit a x i Downloads NGC6888 HaNIlOlll Lab L Mask_1 fit OneDrive NGC6888 HaNIIOIN_Y1 tit lt gt Recent places NGC6888 HaNilOIll_RGB_9x9MedianResidual NGC6888 HaNHOWl_RGB_9x9MedianDetail2 fit 4 Homegroup File name Save as type FIT fit fts fits a Hide Folders Cancel C mages NGC6888 HaNllOlll Lab L Mask_3 fit 1104 x 820 65 Figure 3 Press the Save As Then Copy Mask toolbar button and enter a descriptive mask name imagesPlus 0 Oo ea x x a m mmm m fl aje Ejm ejaj ajajajaja a e E w Ly 5 m Image Dats Type 16 Bit integer C 32 Bit Integer Compression C Uncompressed Lossless lt LS a 5 lajm sia C mages NGC6888 HaNllOlll Lab L Mask_3 fit 1104 x 820 65 Figure 3a Save the mask as a 16 bit lossless compressed FITS or 32 bit floating point uncompressed FITS Step 3 e ImagesPlus me mat t erat special Functions TOE i J0 m mj mi i ool E u pen mages O
38. ess History window and press the Mask button to open the Mask Surface window Right click in the center of the mask area of the Mask Surface window and select Paste to assign the threshold mask to Histogram Contrast Stretch ie ee a Re contrast stretched image Figure 17 Final threshold mask histogram Local Smooth Sharpen Clone Column Fix and Paint The Local Mouse Effects toolbar option is used to perform localized painting on an image using the mouse All of the painting options use the mouse in the same way to paint a pixel or wide path across the image Left click and release on a pixel to apply a paint option to the neighborhood about the pixel with a size set by Effect Size Left click and drag the mouse along a straight line or curve to a new pixel to apply a paint option along the path with path width set by Effect Size Each paint path applied to an image is tracked by the Process History window Undo and Redo can be used to remove or restore paint paths sequentially Select one or more paths in the process list then right click to delete Local Effects C Blur C Darker C Fill With Intensity Yalue C Sharpen C Brighter C Horizontal Line Fill C Column Fix C Clone C Vertical Line Fill Clone From Tool Parameters Blend Mode Feather Pixel Radius Window Size Effect Size Intensity Value Pixel Distance f1 Least 50 Most Opacity nee i a Done Figue 18 Local Mouse tool set
39. f Pixel Distance determines how far on each side of the column pixels are used to computer the new pixel values of the column The Clone options is used to select an area of the image then copy it to the pixels in the path Image files used in this chapter are available at Making and Using Masks Image Files First edition 3 24 15 Last update 3 24 15 Copy Right Mike Unsold mike mlunsold com www mlunsold com
40. ilter in the Process History list of an image then use the Save As Copy Mask button on Custom Luminance Mask to name and save the mask as a single channel grayscale mask and make it available for a paste operation on the Mask Surface window of a filter in the Process History list of an image If the Custom Luminance Mask tool is applied to a single channel monochrome image then the single channel monochrome image is duplicated as a grayscale image with Gray in its window caption bar The Luminance Mask or Lab Luminance Mask toolbar option does not need to be applied before the mask is used with Combine Images since the mask is already a single channel grayscale image If the single channel grayscale mask is to be used with a filter in the Process History list of an image then use the Save As Copy Mask button on Custom Luminance Mask to name and save the mask as a single channel grayscale mask and make it available for a paste operation on the Mask Surface window of a filter in the Process History list of an image In this example a mask will be created that excludes the bright red areas and bright stars of an image so that blue can be enhanced without changing the bright red areas and bright stars Step 1 o ImagesPlus 2 mf lll md ll ley 319 a S505 0 9 a NGC6888 HaNIIOIlljpg RGB 70 NGC6888 HaNIlOlll jpg RGB 70 EE j WE ees eee m m Lel Custom Luminance Mask NGC6888
41. jpg RGB 100 Custom Luminance Mask NGC6888 HaNll Luminance Parameters Bed Lo al S Blue Gamme mage Select Midtone Save Mask As I Mint Cikk JEAN Local Disk C Images Min L Feather M Mexb Desktop 4 Documents NGC6888 HaNIlOlllFilter 2 fit 3 11 2015 6 19 AM Max L Feather NGC6888 HaNIIOIlIFilter 1 fit Downloads Music i NGC6888 HaNIIOIII_Y1 fit 15 10 44 AM ees ne amp Pictures Smooth Radius NGC6888 HaNIlOlll _RGB_9x9MedianResidual 10 16 2014 7 51 A Li Videos gt Local Disk C NGC6888 HaNIIOIII_RGB_9x9MedianDetail2 fit 10 1 31 AM Inven Mask To Alllmages Save As Copy Mask Reset NGC6888 HaNI OIlI_RGB_9x9MedianDetail1 fit 10 1 14 7 51 AM 7 Enable Sliders Lockimage NGC6888 HaNIIOIl _G1 maskg fit 1 NGCARRR HaNIIOIIC4 I ah Mack 1 fit Apply Done Network v File name NGC6888 HaNIlOlliMask ReducedRed Save as type FIT fit fts fits a Hide Folders Cancel C lmages NGC6888 HaNIlOlll jpg 1104 x 820 100 783 312 L 0 0 0 0 Press the Save As Copy Mask button to name and save the image single channel grayscale mask and make it available for use with a filter in the Process History list of the color image Step 7 Oy ImagesPlus inctions View Geometric tretch mooth Sharpen 2m a fo mm ll 8 ll ele 3 9 aa SS 5 0 9 a
42. kground and star images both have minimal blurring The star and background component images created by the Feature Mask tool can be used to create star and background masks The star and background images can also be processed directly then merged to create an enhanced version of the original image For example the Star Size amp Halo Reduction tool can be applied to the star image to reduce star size Curves could be applied to the background image to increase a faint nebula and galaxy The processed detail and background images are then merged to create a reduce star with enhanced background version of the initial image The Combine Images tool is used to merge the low frequency background image with the high frequency star and fine detail image The background image is used as the bottom layer and the star image is used as the top layer with merge split blend mode See Figure 12 for an example A detailed description of the Feature Mask tool can be found in the Multi Scale Decomposition chapter of the ImagesPlus user guide ImagesPlus pecial Functions View TERIN Oe O EES ee S ae ose E EJ ig ala le a Oja E NGC6888 HaNIIOlll Split Stars fit RGB 50 mjmj ejaj 9 9 8 9 8 8 0 0 0 95 a e il Top star amp fine detail layer with merge split blend mode LJ al Combine Images CombinelmagesTarget_1 fit a Hd NGC8886 HeNIOII Split Stars tit ia E NGcss88 HaNIiOlljpg Combine Images By
43. lm ala ajamana olo o a E Operation Parameters i A J J n 4 m J Read Previous Image File CWC 201 AlmagesPius Hanc Micio Curves Current Image Fie i gt gt Hue S sturabory Luminance Color Mode AGB sr Current Color Charnel Al Colors B All Colors a Hue Sh 0 00000 Saturation 0 47800 bb Saturshon Factor 1 00000 Luminance 0 00000 g i l errs eevee 7 MNN lt gt lt gt Blend Mads o 0 100 m Normal zi Ooye e ata 1 000 Mask Ll 4 Mask Surface NGC6888 HaNIIOIlljpg C VC 2012 ImagesPlus gt a sia e alaly Map To Map From Hue Soturabon Blend White Reveal Luminance me j 65535 0 Slider Sensitivity C LobMode SelectHueFromimage Aji Colors fie Saturation Luminance cas tek Al E fi O0 x x fi 00x x Enable Sliders Lock Image Reset Apply I ToAllimages Display Mask Load Apply Reset Al Done CAVC 2012 ImagesPius HandBook MakingAndUsingMasks Images NGC6888 HaNIIOllLjpg The area mask remains available for use with other filters until the mask is changed using the Save As Then Copy Mask toolbar button or the Load button on Mask Surface The area mask is used in this step to increase saturation imagesPlus 0 fo wf wll 1 lel lm le lt 4 a S S o o NGC6888 HaNIIOIlll jpg RGB 80 CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC68
44. m 2 e 3 aja 9 S S 0 0 0 0 6 a NGC6888 HaNIlOIll jpg RGB 100 ee Selective Color Mask NGC6888 HaNIIOIII jpg 4 L S Constraint Luminance v ajm sja AN Black White Min L Min L Feather 2000 Max L G 28785 2000 Mask Leve 0 482 Smooth Radius 3 Invert Mask Lock Image nant eee Save As Copy Mask Apply Done To All Images v Enable Sliders C lmages NGC6888 HaNIlOlll jpg 1104 x 820 100 Adjust the Max L slider towards the left to remove the brightest stars The mask will be used to effect only blue in the nebula imagesPlus e O G x x S i e e B ia t m a aja A a a 5 0 0 ojojo a le Selective Color Mask NGC6888 HaNIIOIII jpg 4 L S Constraint Luminance 7 a 9 0 15 Black Mdtone White Min L Feather 3259 Max L 28785 Max L Feather 2000 Mask Leve L 0 482 Smooth Radius 14 Invert Mask Lock Image Reset Reset Aa Save As Copy Mask To All Images v Enable Sliders Apply Done C Images NGC6888 HaNIlOlll jpg Use the Smooth Radius slider to smooth the mask to improve blending 1104 x 820 100 1096 367 L 0 0 0 0 Step 6 o ImagesPlus 3 channel RGB grayscale image Ch i x x Belli E a vel 2 alt 8 2 m a algae 5 0 0 ojola a E Ci 5 imk EN C Images NGC6888 HaNIIOlll L Mask_3 it 1104 x 820 100 HaNI
45. ns Special Functions View Geometric Stretch Smooth Sharpen Colo Viodeling pen Images Open Operators Helg CO coe Gad x gt lt lal ol ltl lElm ela alallala a lA NGC7000 fit Gray 35 a kg E Tt di MakingAndUsingMasks gt Images Organize New foider A N r amp Favorites nel oi E Desktop NGC70008 1 fit J Downloads NGC7000 2 fit OneDrive NGC7000 3 fit a Recent places NGC7000 3 L Mask_1 1 fit NGC7000 3 L Mask_1 2 fit Homegroup NGC7000 3 L Mask_1 3 fit NGC7000 3 L Mask_1 4 fit WM This PC NGC7000 3 L Mask_1 5 fit Desktop NGC7000 3 L Mask_1 fit P Documents NGC7000 4 fit a Downloads NGC7000 5 fit D Music Nz S File name NGC7000 3 INV L Mask Blais joe la mza s Save as type FIT 7 9 Cancel CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks lmages NGC7000 3 L Mask_1 5 fit 3126 x 2304 35 Use the Save As Then Copy Mask toolbar button to name and save the mask for use with a smoothing filter in the Process History window of the image sn 5 ane 6 e image Set Special Func etch Smooth Sharpen Color eling Openimages Open Operato Heip DSa ja i s s al ial weiss Scie Eaa ERREA NGC7000 fit Gray 35 Smoothing amp Noise Reduction NGC7000 fit Gray Nonadaptive Filters Adaptive Detal Preserving Filters C Box C Selected Neighborhood C Binomial C Absolute Difference Blur Window Size 5 Geussian C Quantile Adaptive Median 1545 X
46. nstraint in order to be included in the mask Smoothing can be applied to the mask to improve its blending capability The inverse of the final mask can also be created Color Spectrum Bar Color List L S Constraint Select Hue From Image All Colors v Luminance amp Saturation a N a E nex Min L 0 Constraint Min L Feather 2000 Max L ee 65535 Max L Feather 2 2000 Mask Level ee eee 0 000 Smooth Radius Invert Mask Lock Image _ Save As Copy Mask ToAllImages V Enable Sliders Figure 7 All hues are used to create the mask Hue Range Selection The color spectrum bar at top of the tool is used to define the hue range If All Colors is selected as the hue range in the Color list then no hue range triangles appear under the color spectrum bar as shown by Figure 7 In this case the Selective Color Mask tool will select all colors from the image that fall within the feathered luminance and feathered saturation range specified by Min Apply Max Apply and Feather Range sliders If a hue range has been selected using the Color list or the mouse then hue range triangles are displayed under the color spectrum bar as shown by Figure 8 The two inner black triangles define the hue range where the pixels are selected for the mask at 100 of their luminance The gray triangles on either side of the black hue range triangles define the hue feather size The triangles are moved using the mouse to refine the hue range
47. o S ImagesPlus 4 File image Set Operations Special Functions View Geometric Stretch Smooth Sharpen Color Modeling pen Images Open Operators Help 0 Ge x x m mmm a jjj Sle oe ajem eja asaljaja ejS O O o o 5 e E Process History NGC7000 bmp Wl Operation EPIO oa j Read Previous Image Fie C YC 2012 magesPhlus Handb High Pass Current Image File gt gt Histogram Contrast Stetch App to Red Green Blue Tyoe Unitoim Scale 0 2250 Highight Scale 0 1000 Highight Break 0 0000 Background Scale 0 1000 Backgiound Break 1 0000 lt gt E gt Blend Mode Oo 50 100 a Noma Opa O 000 _ Mak F Reprocess Commands From Curent gt gt ier Dk J Ea V Show and Set Fiker Window on Undo Redo Double click Delete Project Last Seve Copy As Name PN ae S rrer arer cee TRAN L Histogram Contrast Stretch NGC7000 bmp RGB 35 Tbes Histogram Modification Type Untorm C Rayteigh C Hyperbolic C Logarithmic lal lalm 1915 C BaeckgroundHighlight Contrast C Exponential z Brightness i l H i i 0 2250 Highlight Bx a s Contrast Li 0 0 Brightness Background Brightness it 310 Contrast ime S i l l i 10 V Enable Slider ToAllimages Lock image Apply Reset Done CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 bmp 31
48. oO NGC6888 HaNIIOlll jpg RGB 50 ant Micia NET Blend Opacity and Mask L a 2 0 a Opacity i 7 000 SL ej 4 Source Image Stack Order ource Image X Y Addimage V Uselmage 4 R A E AddMask p aint ical 4 A By Pixel t gt 1 Top t Delete Image i al z Y Bae Bottom j a Display Combination image ash Minimize All lathe Merged image Bottom background layer CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks mages CombinelmagesTarget_1 fit 1104 x 820 50 Figure 12 Combine Images layer tool is used to merge the split background and star images Smoothing Filters The Smoothing Filter toolbar option is a shortcut to the Smoothing amp Noise Reduction tool on the main Smooth Sharpen menu The smoothing tool contains several non adaptive and adaptive edge preserving smoothing functions The Gaussian and median smoothing functions are used most often to smooth a mask to improve its blending capability Nonadaptive Filters Adaptive Detail Preserving Filters C Box C Selected Neighborhood Blur Window Size C Binomial C Absolute Difference 101x101 Gaussian C Quantile Adaptive Median C Median Strength fi Image Select Black Midtone White Min Apply R fo T Max Apply a 65535 20000 o 0 50 100 Filter Strength Reset Apply Lock Image Done Figure 13 Smoothing tool set to use a Gaussian blur Feather Range 0
49. ocal Smooth Sharpen Clone Column Fix and Paint s gt ajm aalala p all l e Figure 1 Mask tools are located on the left vertical toolbar This vertical toolbar button is used to name and save the current active single channel gray scale image mask to a hard drive The mask is also set as the current system mask so that it can be pasted onto the Mask Surface window of a filter in the Process History list of an open image See the Using Process History Adjustment Layers section of the Layers Blend Modes Opacity amp Mask chapter of the ImagesPlus user manual for a detailed description of using the open image Process History list The steps for using the Save As Then Copy Mask option are always the same Step 1 Open or create a single channel gray scale image using the mask tools explained below A single channel gray scale image always has Gray in its top window caption bar as shown in Figure 2 imagesPlus oO 2 x x ee Bl ml elle oie ai8 8 a S S 0 0 0 9 8 NGC6888 HaNIIOIll jpg RGB 65 Lo a ee a sja 3 channel color image Single channel monochrome image C mages NGC6888 HaNllOlll Lab L Mask_3 fit 1104 x 820 65 1050 87 L 3661 14 14 14 Figure 2 A 3 channel color image is shown left and a single channel monochrome gray scale image on right A 3 channel color image has RGB in its top window caption bar A single channel monochrome image can have gray red gre
50. perators Help Process History NGC6888 HaNIIOIILjpg a m 8 3 a a 5 0 0 0 9 e L Operation Paiamatere A Read Previous Image Fle C images NGO6888 HaNII01 gt Micro Curves Curent Image File 2 Curent Channel RGB NGC6888 HaNIIOIIL jpg RGB 65 AGE Curve Black Xx 0 n lt P 4 5 aw ar e lt ig Black Y 0 an Ase Jk a be ts White 255 uw a sy gt FN agi gt S i oe White Y 255 s a Number of Control Points 2 Y i Prot 1 m EN lt gt lt gt Blend Mode o 50 100 a o NOE EN a a A i Noma z Opacity e 1009 _ Mask 7 y 65535 0 Rleprocess Commands From Current gt gt Usar Comment y r j EA V Show and Set Fiker Window on Undo Redo Doubleclick Delete 28 lt Project 2 A Last Save Copy As Name ne N Save As Pim Te Done EE i a 0 ee ar o 4 EiS D0 See ee a Oy hs w t e Po A g aA b A Tite 73 oo u gt nitah lt a 4 its lt j HE 7 A 3 A 2 ti ae v Eas Min 0 0 Mid 32767 0 Max 65535 0 Preset Curve Detoult v Channel RGB x Image Select 7 MinApply MaxApply Range Black Micltone White i Lab Mode F ToAll images Reset Reset All Lockimage V Enable Drawing Apply Done C Images NGC6888 HaNllOllljpa 1104 x 820 65 Figure 4 The mask can now be used with a filter that has been a
51. pplied to an image with the same width and height as the mask The above image is shown with Micro Curves applied without a mask A filter in this case Micro Curves appears in the Process History list of an image after the filter is applied to the image ImagesPlus 8 0 0 0 0 5 a m SESE TESESE CAI es eT EVES PICS Paramaters Previous Image Fle C images NGO6882HaNII0 Curent Image File Cunent Channel RGB AGS Curve Micro Curves NGC6888 HaNIIO 65535 0 C Images NGC5888 HaNTIOMI Lab L Mask_3 fit PE Copy Mask Min 0 0 Mid 32767 0 Max 65535 0 Paste Mask Preset Curve Defaut z Channel RGB z Image Select 7 MinApply MaxApply Range Black Midtone 65535 0 Reset Mask Ql Ql Use Mask 7 Display Mask Load Apply Cmages NGCERAR HANO Pa Figure 4a To assign the mask from step 2 to Micro Curves first pressthe Mask button on the Process History window then right click on the center area of the mask surface window and select Paste The mask is automatically applied with Micro Curves tothe image The mask saved in step 2 can also be assigned to Micro Curves by setting the Mask Type as Mono Image then use the Load button to load the mask from the hard drive where it was saved If you want to edit the mask assigned to a filter in the Process History window then follow these steps 1 Use either File Open or the Display Ma
52. r example suppose min L is set to 7500 and max L is set to 32000 with min and max L feather radius of 1500 then pixel luminance is selected at 100 in the luminance range 7500 32000 Pixel luminance is used from 0 to 100 as pixel values increase from 6000 to 7500 and as pixel values decrease from 33500 to 32000 Pixels with values less than 6000 7500 1500 or greater than 33500 32000 1500 are not used by the mask and the pixels are set to O or black in the mask Saturation Range Selection Select Saturation in the L S Constraint list to set the min max and feather range sliders to saturation mode Adjust the Min S Min S Feather Max S and Max S Feather sliders to select the low moderate or high saturation areas from the selected hue range The Min S and Max S Apply sliders define the saturation range min S value max S value where pixel Saturation in the hue range is selected at 100 of its value The Min S and Max S Feather Range sliders are used to define the feather radius for pixel values with saturation less than the min S value and greater than the max S value For example suppose min S is set to 0 25 and max S is set to 0 75 with min S and max S feather radius of 0 20 then pixel saturation is selected at 100 in the saturation range 0 25 0 75 Pixel saturation is used from 0 to 100 as pixel saturation increases from 0 05 to 0 25 and as pixel saturation decreases from 0 95 to 0 75 Pixels with saturation less than 0 05 0 2
53. sk The Custom Luminance Mask toolbar option is used to create a luminance mask from a color or monochrome image The red green and blue channel data of a color image can be mixed to set the brightness of the mask Gamma of the mask can be adjusted A feathered min to max luminance range can be used to select only dark midtone or highlight areas of the image Smoothing can be applied to the mask to improve its blending capability The inverse of the final mask can also be created Luminance Parameters Image Select Black Midtone MinL ee Tm Min L Feather X A S O 2000 Max L 65535 Max L Feather J1 2000 Smooth Radius 3 Invert Mask To All Images Save As Copy Mask Reset V Enable Sliders Lock Image Apply Done Luminance Parameters The Red Green and Blue sliders are active when Custom Color Mask is applied to a color image The values of the Red Green and Blue sliders range from 0 0 to 1 0 and are used to create the luminance at each pixel by forming a linear combination of the red green and blue values of the pixel For example suppose a pixel p has RGB values Rp Gp Bp and the Red Green and Blue sliders are set to R G and B then the luminance value at p is given by Lp R Rp G Gp B Bp If G B 0 and 0 0 lt R lt 1 0 then the luminance mask is the same as the red channel mask scaled by R If Custom Luminance Mask is applied to a single channel monochrome image then the Re
54. sk button on the Mask Surface window to open the mask 2 Now apply any sequence of filters or the local paint tool to the mask to modify the mask 3 Use the Save button on the top horizontal tool bar to save the modified mask 4 Press the Apply button on the Mask Surface window to update the image that the mask and filter are applied to The Save As Then Copy Mask toolbar option is not normally used with the Combine Images layering tool Images and their masks in the Combine Images layer tree are all open images and are always available for direct processing Each open image and mask has its own Process History layer list Luminance Mask amp Lab Luminance Mask The Luminance Mask toolbar option creates a HSL luminance mask from the current active color image The Lab Luminance Mask toolbar option first converts the current active color image to Lab color space then create a luminance mask from the L component A Lab luminance mask is generally darker and smoother with less contrast than the HSL mask as shown by Figure 5 A luminance mask and its negative which is called an inverse luminance mask have many uses Some of the common applications of a luminance mask included modification of the highlights of an image by adjusting sharpness hue saturation contrast adjustment and brightness of the highlights The inverse luminance mask is often used to smooth the dark background or stretch the faint part of an image with little change to the brigh
55. sk limits sharpening to the edges of the color image The Combine Images tool is explained in detail in the Layers Blend Modes Opacity and Masks chapter of the ImagesPlus user guide Feature Mask The Feature Mask tool is used to spilt a color or monochrome image into high frequency and low frequency component images The high frequency component contains stars and fine image detail The low frequency component contains large scale objects that change slowly across the image such as the background The main advantage of the Feature Mask tool is that the background and detail images have minimal blurring compared to other decomposition methods imagesPlus 0 f x x a a mmm ww ly Le 1 al em fm 8 8 a 8S 510 10 0 5 9 a 7 NGC6888 HaNIIOlll jpg RGB 50 5 Low frequency background NGC6888 HaNIIOIIl jpg RGB 50 Masked Area Size Fill Radius V Enable ee SS NGc6888 HaNllolll Split Stars fit RGB 50 O Beare DA ANAR Lel als il gt j lajm 9 6 15 ilala al a al a S V Enable Sliders Lockimage F Split Stars Apply Done Initial image High frequency star amp fine detail CAVC 2012 ImagesPius HandBook MakingAndUsingMasks Images NGC6888 HaNIIOllLjpg 1104 x 820 50 11 615 L 6425 25 16 11 Figure 11 The Feature Mask splits the initial image into a low frequency background image and a high frequency star and fine detail image The bac
56. ss History NGC6888 HaNIIOIllLjpg SECHHOLOCOODESEE a 8 8 3 5 5 5 0 2 E m simama a act IS Jos m J d Read Previous Image Fie CWC 207 2 imagesPlus Hanc gt gt Micio Curves Current Image Fie CWC 201 2 magesPlus Hande Current Channel AGB RGB Curve Black X 0 Black Y 0 White 255 White Y 255 Number of Control Pais 2 v Drit 1 A lt gt lt gt Blend Mode ox mx 100 Screen v Opacty FLEUR SED i sor N 1 000 Mask Repiocess Commande From Curent gt gt f User Comenert Mask Surface NGC6888 HaNIIOIIl jpg lus Min 0 0 Mid 32767 0 Max 65535 0 Preset Curve Default v Channel RGB Image Select Min Apply MexApply Range Black Midtone White i Black Blend White Reveal v Mask Level ere _ 65535 0 Mask Type LebMode f ToAlllmages Reset Reset Al Reset Mask E Q Lockimege V Enable Drawing Apply Dones Display Mask Load Apply CAVC 2012 ImagesPius HandBook MakingAndUsingMasks Images NGC6888 HaNIlOllLjpg 1104 x 820 100 Micro Curves is applied to the image with the area mask to brighten only the brighter mask areas Step 6 re Repiocess a From Curerit gt J User Comenert imagesPlus p E mae Set Ooie Soen View Gedmetic Shetch Simooh tamer Caa Morelur Gaenlinaces GuenGneaics Han Process History NGC6888 HaNIIOllLjpg Cl bed x x m _ m g 2 m 2
57. t areas imagesPlus amp rie Mage gt et perations Special Functions View Geometric Stretch Smooth Sharpen Colo pen images Jpen Operators Heip Ch teh x x m EE m P A P N sll rS A dt ball cll lel elotete Eanna ojoje celina te oe E NGC6888 HaNilOlll L Mask_2 fit Gray 50 ot Saas SE eeaeee Luminance Mask n ET e es R a Active Image Lab Luminance Mask CAmages NGC6AAS HaNIIONIjpg 1104 x 820 50 Figure 5 The luminance and Lab luminance masks of the active image are created by pressing the Luminance Mask and Lab Luminance Mask toolbar buttons respectively The red green and blue channel mask toolbar options are used to splitting the red green and blue data from a color image into separate single channel monochrome images as shown by Figure 6 ImagesPlus oO mage gt et Operations pecial functions View Geometr Stretch Smooth Sharpen Color Modeling pen images Jpen Operators Heip g NGC6888 HaNIIOlll jpg RGB 50 _ ce EA ea x x memm E l e ltl l ela aalalalaanololola a Active Image ii Blue Mask a Green Mask See Red Mask C lmages NGC6888 HaNllOllljpa 1104 x 820 50 Figure 6 Press the R G and B Channel Mask toolbar buttons to create the R G and B masks The red channel mask is used to modify red areas of an image with less effect to the green and blue areas The green and blue channel mask are used in a similar way Custom Luminance Ma
58. tT bh MakingAndUsingMasks gt Images Organize New folde s ji Pave Copy As Name Print Tet Done lt gt Recent places A Homegroup Cikam 3 2 I Ms This PC NGC6888 HaNIIO NGC6888 HaNII O NGC6888 HaNIlO NGC7000 3 INV lil AreaMask_1 fit ill AreaMask_2 fit Il AreaMask_3 fit L Mask fit me Desktop Documents Downloads Music rt amp es Pictures Videos amp Local Disk C NGC7000 3 L M NGC7000 9 L M NGC7000 fit NGC7000Filter 1 ask_1 fit ask_1 fit fit v v File name NGC7000 9 L Mask_Threshold v Save as type FIT fit fts fits v Cancel a Hide Folders CAVC 2012 ImagesPlus HandBook MakingAndUsingMasks Images NGC7000 9 L Mask_1 fit 3126 x 2304 35 Use the Save As Then Copy Mask toolbar option to name and save the smoothed threshold mask The mask can now be assigned to a filter in the process history list of the image Step 6 o imagesPlus o la 0 0 x lt a a mmm a gt 5 w L o m 2ja ajajaja Ejojnjojojo gt Process History NGC7000 9 omp IEJ Operation Parameters gt 4 oz L ead Previous Image Fie C YC 2012NmagesPhlis HancB NGC7000 bmp RGB 35 oh Pass Diar bnat Fi Apply to Red Green Blue Type Gaussian Filter Fiter Stengh 1 0000 Window Size 41 x41 Copy Apply Min Apply Mas 65535 Feather Range 0
59. tion as the Save As Then Copy Mask button at the top of the left vertical toolbar If Lock Image is checked when the tool is applied to an image then the tool will always be applied to the same image until the image is closed or Lock Image is unchecked This option is used to apply the tool to the same image without selecting the image when multiple images are open If Tool All Images is checked then the tool will be applied to all open images that are compatible with the tool Enable Sliders is used to control the automatic application of the tool If checked then the tool will be applied after each change in a slider or triangle If you want to adjust multiple controls before the tool is applied then uncheck Enable Sliders adjust the controls then press Apply Reset is used to return the hue saturation and luminance range for a given color in the Color list to their default position of no change Apply is used to apply the current setting to the current image Press Done or the X at the top right of the tool to close the tool Example The Selective Color Luminance Mask tool can be used to create a mask from a three channel RGB color image but not a single channel monochrome image The Selective Color Luminance Mask tool is used in this example to create a mask that targets only the blue area of a nebula with little change to blue stars or other areas of the image Step 1 oO ImagesPlus 0 0 a x TOIL See E gt 5
60. to None or not active Effect Size is used to specify the width of a painted path If effect size is set to 1 x 1 then only the pixels that define the path are painted If Effect Size is set to N x N then all pixels within a N x N neighborhood about each path pixel are painted The blend mode of a paint path can be set to normal average lighten max or darken min using the Blend Mode list Opacity of a painted path is adjusted using the Opacity slider The Blur option applies a Gaussian blur to the path The smooth radius or strength of the blur is set by the Window Size list A smaller window size blurs the path less than a larger window size The Sharpen option applies unsharp mask to the path The unsharp mask sharpening strength is set by the Window Size list A smaller window size sharpens the path less than a larger window size The Darker and Brighter options subtract or add a constant value to the painted path respectively The constant value is defined by the ntensity Value The Fill With Intensity Value option will replace the pixels in the path with the value set by the ntensity Value The Horizontal Line File and Vertical Line Fill options replace the pixel in a horizontal or vertical path defined by the initial and terminal point of the path The value set by ntensity Value is used to replace pixels in the horizontal or vertical path The Column Fix option is used to repair a bad column in the image The value o
61. x ee mmm m eit eo ie ajajaj s 8 5 0 0 0 5 gt e E NGC6888 HaNIIOlll jpg RGB 100 oO kai ual LJ Custom Luminance Mask NGC6888 HaNIl T b7 gt Luminance Parameters E Bed CI _ Green fied Blue LA p E Gamm t o i z FAE a image Select Black 1E Gee se ee ss T E I eee A ATENE le peony SC Mox L Feather S s a gt Smooth Radius Inven Mask ToAlilmages Enable Sliders Lock image C lmages NGC6888 HaNIIOlll jpg 1104 x 820 100 797 488 L 38463 130 150 150 slider will be set to the grayscale value between 0 0 and 65535 0 that you click on as shown by the image below o ImagesPlus _ ecial Functions View harpen Color Modeling ma SEORHOLOOOOEECEDEEELREENOAOLCERRERHNA0OE NGC6888 HaNllOlll jpg RGB 100 Custom Luminance Mask NGC6888 HaNll Luminance Parameters image Select Black Mint i AE a a ee MinL Feather _ ot MexL Mox L Feather Smooth Radius 3 Inven Mask Copy Mask Reset Enable Sliders Upckimege C lmages NGC6888 HaNIIOlll jpg 1104 x 820 100 1100 687 L 12516 48 48 48 The Max L slider is set to 40332 so all pixel values greater than Max L Max L Feather are set to black Step 4 ImagesPlus 5 2m mf a ly 9 8 8 8 SSO
62. y NGC6888 HaNIIOlll jpg RGB 100 Histogram Contrast Stretch NGC6888 HaNIIOIll jpg Histogram Modification Type Uniform C Rayleigh C Hyperbolic C Loganthmic C Backcround Highlight Contrast C Exponential Brightness 0 3320 Highlight Brightness o Contrast SSS a Background Contrast 0 0 0 Brightness 0 10 10 i V Enable Slider ToAllimages Lockimage Reset Done ga o E H G 1104 x 820 100 1031 496 L 8995 35 16 10 Open or restore the color image that was used to create the mask Apply a stretch to the image Blue is enhanced but the red areas are now too bright and the stars are much larger Step 8 oO pecial Functions ew Geometric Stretch Smooth Sharpen Color Modeling DODES JE a o a m lt 3 a 8 S S 0 0 5 9 e ECEE Process History NGC6888 HaNIIOII jpg Operation Parameters Read Previous Image Fle C images NGCSS8RHaNIIOIN gt Histogram Contrast Stretch Curent Image Fils F rA Highight Scale 0 1000 Highight Break 00000 Background Scale 01000 Background Break 1 0000 lt Bler Mode 4GC68B88 HENIIOMIMask ReducedRed fit Histogram Contrast Stretch NGC688 Histogram Modification Type Uniform C Bayleigh C Background Highlicht Contrast i i Copy Mask gitness 5a Paste Mask Highlight Brightness i Contrast f Background Brightness Contrast
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