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Thanks to the power of internet we do not need to speculate; here is a comparison between image formats, JPEG2000 being represented by "OPENJPEG": https://wyohk

by zokier 5y ago

Thanks to the power of internet we do not need to speculate; here is a comparison between image formats, JPEG2000 being represented by "OPENJPEG": https://wyohknott.github.io/image-formats-comparison/#sking*2:1&jp2=m&jpg=m https://wyohknott.github.io/image-formats-comparison/#sking*... Subjectively I think JPEG2000 is better across the different images, at least at this "medium" size preset.

aidenn0 5y ago
I should also point out that mozjpeg is considerably better than jpeg compressors that were around when JPEG2000 was introduced. I don't know if openjpeg is similarly improved.
ahartmetz 5y ago
IMO, they are closer than in other comparisons except you can still see some of the usual problems: e.g. in the "Cecret [sic] Lake" image on Medium: with JPEG there is a hint of ripple on the lake and most of the raggedness of the edges of the clouds is still there. With JPEG2000, the reflections on the lake turn into blotches and clouds have soft edges, even missing some large and obvious details. For some reason, it's quite disturbing to me. OTOH, JPEG2000 does a surprisingly very good job on the bushes. Maybe JPEG2000 could be actually good by allocating a little more bitrate to low contrast areas.
masswerk 5y ago
I actually prefer JPEG, esp. in small size. – Thanks for the Link!