Color rendering problem when exporting image between what is shown in affinity (with or without soft proofing) and the exported preview

[plpub]

Hello

I have problem with the color rendering of the export preview in affinity photo vs color rendering of the image I am currently editing. I joined a simple example.

• p00.afphoto : original image (blue sky) edited with color format RGB/8 and profile sRGB

p00.afphoto

• I add a soft proof mask with same parameters (sRGB) for the example 
• When I ask to export the image in JPEG (sRGB as well), the blue color is different in the export preview compared to edited image.

• And the difference is visible whether I activate the soft proofing or not.

I would like to know what is wrong in my manipulation ?

What I want is to be able to edit an image  and being able to view the color rendering of resulting print I want to use. I understand that soft proofing is the tool to use, but and I do not understand why the export preview is so different than the edited image, even with soft proofing activated.

Thanks in advance

Pierre

Edited March 19, 2023 by plpub

[lepr]

Your document has sRGB profile, so there is no point in using an sRGB soft proof - it won't, and shouldn't, have any effect.

There could be a colour management problem particular to the Windows app because the document view and export preview (with same export options as you) match on my Mac.

Also, it's possible that your export preview is closer to being correct than your document view. It's hard to tell because your screenshot has no embedded profile and there's no way for me to know its history of possible profile assignments or conversions. My screenshot was converted from the display profile to sRGB before uploading to the forum. However, I will say that your screenshot has an export preview that is very close to mine (export preview and document view), whereas your document view appears very noticeably different.

 

 

[plpub]

Thanks for your reply. The use of sRGB everywhere in my example was just for easy understanding and I agree it should have any effect indeed.

What is very interesting is that you don't have the difference in rendering with the MAC application. Could it be a bug in Windows application ?  

[lepr]

2 hours ago, plpub said:

What is very interesting is that you don't have the difference in rendering with the MAC application. Could it be a bug in Windows application ?

I did say, "There could be a colour management problem particular to the Windows app [...]"

Notice I said "could be", not "is".

Hopefully, a Windows user and/or a Serif representative will assist you now. Good luck, anyway.

[lacerto]

Obsolete.