(01-25-2023, 05:49 PM)rich2005 Wrote: I have to confess, I do not understand your PS.
Sorry, not native speaker for English, but I will try explain what I noticed:
I tried to convert a regular .png screenshot to .avif image via GIMP.
But no matter what settings I use - some details of the image are differ from the original .png. And i can't understand "why?".
For example: download please these 3 images.
The archive contains 3 files:
1) File "Example" shows an element which you could take a look.
2) File "PNG" is an original screenshot itself in .png
3) File "AVIF GIMP 2-10 lossless" is an .avif image created by GIMP 2.10.32. It was created with "lossless" settings.
If you compare the element that I marked from the file 1, on the files 2 and 3 you could notice a difference in a color (after GIMP it looks like a more blue color). In GIMP 2.99.14 as far as check result is same.
Example
Upd.
I did also the same conversion via paint.net and the colors matched there. But .avif image after paint.net don't want to open in Firefox.
Image after GIMP 2.10.32 works in Firefox as it supposed, but after conversion I noticed this color change, so this is what this question was about - why does image (even lossless) change it's color in details like this.