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It was nice back then but the one thing that completely boggles my mind, after decades of keeping and backup'ing .jpg files around (family pictures), is that I
by TacticalCoder 2y ago
It was nice back then but the one thing that completely boggles my mind, after decades of keeping and backup'ing .jpg files around (family pictures), is that I can now compress these very same files to JPEG XL and deterministically get, bit for bit, the original jpg if I want. "Lossless" 20% to 30% gain (I know jpg is lossy: but JPEG XL doesn't lose additional details).
Having files around which, for twenty years, couldn't be compressed losslessly and that now suddenly can is just wild.
And even though I didn't look that much into it JPEG XL is, basically... More DCT!?
- lifthrasiir 2y agoIf you transcode JPEG into JPEG XL the underlying DCT is limited to the usual 8x8 block (otherwise it'd be much harder to reconstuct the original bitstream), and all the improvement will come solely from better entropy coding and prediction.