teamrjh Posted March 4, 2018 Share Posted March 4, 2018 I have not been able to find any information in help files or video tutorials of how to make a composite image from separate RGB layers. I've done this in PS but can't seem to find a way to do this with affinity. I've imported my RGB Astronomy images into a layered RGB image and filled each layer with color in the channels section. I just cannot figure out to whit's end how to combine them into a composite so I can finish processing the images. Flatten or merge don't seem to work. Can anyone point me in the right direction? Quote Link to comment Share on other sites More sharing options...
Fixx Posted March 5, 2018 Share Posted March 5, 2018 I started to answer about channel editing but at second reading that does not seem to be the point... Astronomy people here will know better what is needed. Quote Link to comment Share on other sites More sharing options...
lepr Posted March 5, 2018 Share Posted March 5, 2018 . John Rostron and Alfred 2 Quote Link to comment Share on other sites More sharing options...
Guest Posted April 5, 2018 Share Posted April 5, 2018 I am new to AP but very experienced in astronomical image processing and have just derived a way to do this that produces correct results Assuming each of the R G and B channel files have been aligned, stretched, pre processed for flats, bias etc... and are in-compressed bring each file into AP separately and convert to RGB 16bit mode Go into the red file and ensure channels is visible duplicate the background layer and name it EG - Red layer Delete the main background layer In the channels section disable all channels (editable and view) except the blue and click the blue channel Go select all delete Now click the green channel and make it editable and disable the blue channel Select all - delete Click the reset button in channels Document flatten Now do the same for the Blue and Green but change the above by deleting the non required channels ie Blue - delete the Red and Green channels etc You should now have 3 correctly represented colour images Copy and paste the Blue image into the red image as a layer and the green image into the red image as a layer This will now become your RGB main image In this RGB main image change each layer to Layer Mode ADD Now you have a full RGB image PS - Group the 3 layers and change the group mode to normal then you can amend each colour layer as needed -ie Change blend amount to balance colour mix BTW - often Blue needs to go above 100% blend - just duplicate the Blue layer and reduce its opacity This is more longwinded than PS so write a macro and all is good, this will also give much more control over each colour and blending etc, IS also non distructive Quote Link to comment Share on other sites More sharing options...
teamrjh Posted April 6, 2018 Author Share Posted April 6, 2018 Dr. Astronomy, Thanks for the information. I have tried several different methods and I get a few steps further each time but not as quick if I were in PS CC I'm not fond of PS and I am going to give your method a try since I enjoy using Affinity a whole lot better than PS. Yes, a little long winded but if it works than a macro is in order. Thanks again. Quote Link to comment Share on other sites More sharing options...
Guest Posted April 6, 2018 Share Posted April 6, 2018 To help out here are my basic macros for the colour conversions Load each mono file into AP separately and run the respective macro. Then copy and paste each (now coloured) file into a single one and blend mode each as add PS - Macros are written for windows grey to blue.afmacro grey to green.afmacro grey to red.afmacro Quote Link to comment Share on other sites More sharing options...
lepr Posted April 6, 2018 Share Posted April 6, 2018 . Quote Link to comment Share on other sites More sharing options...
lepr Posted April 6, 2018 Share Posted April 6, 2018 . Quote Link to comment Share on other sites More sharing options...
Guest Posted April 6, 2018 Share Posted April 6, 2018 Thanks for the macro - great Unfortunately past command doesn't work on my pc - just gives a vastly magnified image of the pasted file which cannot be resized so I have to bring each file in separately. Quote Link to comment Share on other sites More sharing options...
lepr Posted April 6, 2018 Share Posted April 6, 2018 . Quote Link to comment Share on other sites More sharing options...
lepr Posted April 6, 2018 Share Posted April 6, 2018 . Quote Link to comment Share on other sites More sharing options...
teamrjh Posted April 10, 2018 Author Share Posted April 10, 2018 Dr. Astronomy A couple of issues while trying to use the information you provided. 1. The macros are not a recognized format while trying to import each of the files into the macro library. The extension must be .afmacros not afmacro. Otherwise the AF import does not recognize the file. 2. If I rename the extension to .afmacros then I get "Unexpected Macros Format' error while importing the file to add to macros library. The import function now sees the extension but get the error. 3. I tried the initial steps you outlined above on you post from March 4th disabling the channels does not work so I have not been able to figure out what is going on from your process to make corrections to it. I have each image layer in greyscale, 16-bit and mode set to RGB ready to covert to individual layers for LRGB I use a much more robust tool (Astro Pixel Processor) tool for stacking and registering all my images before importing each of the LRGB & Ha images into Affinity. Quote Link to comment Share on other sites More sharing options...
lepr Posted April 10, 2018 Share Posted April 10, 2018 . Quote Link to comment Share on other sites More sharing options...
teamrjh Posted April 10, 2018 Author Share Posted April 10, 2018 Owenr: I was just in the process of trying it out lepr 1 Quote Link to comment Share on other sites More sharing options...
teamrjh Posted April 10, 2018 Author Share Posted April 10, 2018 Owenr: I successfully ran your macro after converting each image to RGB/16, re-saving the tiff file then load and run the macro over the red layer. Your macro was simple and efficient. Now I have a composite I can continue to post- process. I should be able to modify this macro to add the Luminance, Ha, OIII, and SII layers as well Quote Link to comment Share on other sites More sharing options...
lepr Posted April 10, 2018 Share Posted April 10, 2018 . Quote Link to comment Share on other sites More sharing options...
mike_leishman Posted December 4, 2020 Share Posted December 4, 2020 I have combined the images from the Juno Jupiter space mission that come as 3 mono images for the Red, Green and Blue spectrum and been able to put them together as a 16bit colour image. 1. Create a new stack containing the three images (Red component, Green component, Blue component) 2. Convert the stack to 16 bit RGB 3. Open the stack and select a channel for one of the image layers in the stack. Clear the colours not for that colour (ie - clear blue and green for the red channel etc). Do the same for the other two colour layers. 4. Change the stack to Range or Total 5. Use "merge visible" to create a new layer and work with that. I have made a short video that demonstrated how I did this. Quote Link to comment Share on other sites More sharing options...
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