Hi,
I just started looking a bit deeper into Siril and it’s possibilities.
I noticed there’s the option to split a color image into its LAB components 
.
However, I couldn’t find a way to convert it back to a color image after some processing 
Both gui and command line seem to only cover composition from RGB-type images - or did I overlook something? (I’m using 1.3.2)
https://siril.readthedocs.io/en/stable/processing/rgbcomp.html
Look below the note box on this page, there is L*a*b* in the combo box on the right
Yes, I saw that, and thought it would be it. But I split a color image to three L,A,B files, and tried to get back the original one using this, and failed
And as there was no option ‘RGB’ I eventually assumed this would only affect the way how additional images (more than three) get merged in.
Maybe related, whatever I try, I get the message
15:14:46: Input images have inconsistent ICC profiles. First image had no ICC profile. All input layers will be treated as raw data.So an example in the docs how to do this (split in LAB, and recompose) would be highly appreciated confused
Hello,
I am facing the same issue trying to reconstruct the original image from the previously extracted luminance ,CIEa and CIEb planes. Is it possible ? What is the exact procedure ? I read the docs but it is not very clear about this. I tried to set the CIE Lab* option but the image is not the original ! How to assign the planes ? I enter the name of luminance image in the luminance box and then the CIEa plane in the second and CIEb in the third. But how to set the colors corresponding to these chrominance layers ?
Thank you for your help. ( I find SIRIL fantastic 
)
You cannot reconstruct L*a*b in Siril yet. This is scheduled for the future.
Thank you for the very fast answer ! I am looking forward to that feature, since it would allow the stretching of the intensity without affecting the colours.