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Yes, I believe that's right. JPEG XL is able to compress JPEGs in a way that is pixel for pixel identical to the output of a JPEG decoder, but can't be reversed
by bscphil 7y ago
Yes, I believe that's right. JPEG XL is able to compress JPEGs in a way that is pixel for pixel identical to the output of a JPEG decoder, but can't be reversed into a bit exact copy of the original JPEG.
- JyrkiAlakuijala 7y agoJust one clarification about this: As stated before in these comments, JPEG XL includes brunsli, so JPEG XL allows for byte exact transport of the original JPEG file (with -22 % in size). This can be practical for example for file system replication or for long term storage of a lot of original JPEGs. The other, non-brunsli JPEG XL modes can do pixel exact, but byte exact can be more appealing for some use cases.