Aras PranckevičiusJun 25
Was nerdsniped into doing comparison of EXR, EXR+HTJ2K, JPEG-XL for *lossless* compression of *float* images. Am I doing something wrong, or is JPEG-XL not that great at this use case? https://github.com/aras-p/test_exr_htj2k_jxl
Show threadimp >:3
@aras what purpose does JPEG-xl serve BTW? I came across it while expiring stuff from krita but didn't really get it...
Jun 25 at 1:33pmWeb
Show threadVlad EriumJun 25
@imp3tuz @aras Multi layers, multi channels, high bit integers or floats.
Encoding and decoding speed way faster than jpeg2000 that in most case not support more than 16bit int.
But HT2K extension made jpegxl in case of lossy encoding/decoding speed I guess.
Show threadimp >:3Jun 25
@shamanix @aras can old systems handle it? Or would you require some code or something? I guess my question is- how backwards compatible?
Show threadAras PranckevičiusJun 25
@imp3tuz @shamanix it has nothing to do with JPG besides sharing the similar name. It is a different file format, so no, software that does not implement support for it obviously will not support it.
Show threadIgnas KielaJun 25
@aras @imp3tuz @shamanix I mean, it's the same standards group as the old format (nevermind that it's 30 years later)
Show threadAras PranckevičiusJun 25
@ignaloidas @shamanix @imp3tuz yeah, same standards group that gave us: JPEG, JPEG-2000, JPEG-AI, JPEG-LS, JPEG-XL, JPEG-XR, JPEG-XS and some others. Of which, only the first one is what 99% of people are aware of (so far) :)
Show threadIgnas KielaJun 25
@imp3tuz @shamanix @aras new format entirely, needs new code, but can losslessly re-compress JPEG's with fairly significant savings