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by ache7
2166 days ago
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"All JPEG decoders have chroma upsampling." Well, I meant better upsampling than bilinear interpolation, which blurs chroma. "Oh, you can also jointly optimize the YUV-RGB conversion because if the pixel ends up out of range in RGB space it is probably a compression artifact." Probably not, I suspect that the mozjpeg encoder may use this, so images with black on white text look better (artifact noise go beyond of range). |
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