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Strange color issue happen on -q 5~6(--quality) #24
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I'm not really in the mood to solve this now because of the current world situation that happened because of my country. This is when the UV upscaler makes the wrong decisions. Need a way to limit this. As I see it, mostly the upscaler works correctly, but in some places it creates artifacts. Try replacing the text "16.0f" (use "search and replace") in |
I understand, Thank you for your reply. |
If you find a better value for this constant - feel free to tell me. |
This limit doesn't solve the problem, need a different solution. |
Hi @ilyakurdyukov . Maybe track the value of the coefficients on a given image via Or use |
It seems to be the sum of small errors from different methods. In the original, the chroma has a red dot here, which gets brighter after reducing the artifacts, and then colors part of the line after the chroma upscale and gets even brighter. Unfortunate artifact from recovering the lost precision. I saw this once in my test data as a miscolored dot. |
Hello Ilya Kurdyukov, Sorry to bother you.
I get some strange color issue on non-photo drawing content,
those issue will happen on
-q 5~6
(--quality).In this non-photo picture case, green book middle area have some tiny red pixel,
-q 3~4
haven't happen this issue.original-cut-png (jpeg q90 420)
qs-q6-png
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