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A comment on The case against JPEG XL. Parent comment

Re:The case against JPEG XL by edflsafoiewq on Monday September 14, 2026 @03:27AM (#49693155)
Being lossless is a function of the whole pipeline from an input image to an output image. The last step being encode to PNG doesn't guarantee anything about losslessness.
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Re:The case against JPEG XL by xigoi on Monday September 14, 2026 @03:50AM (#49693349)
Lossless means that the file encodes the exact same information that was given to the encoder. This is a property of the format.
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Re:The case against JPEG XL by ZeroGravitas on Monday September 14, 2026 @04:19AM (#49693574)
Yes but people add pre-preprocessor steps to image formats, like blurring jpegs or lowering bit depth in PNGs to make them more compressible.
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