| ▲ | lonjil an hour ago | |
The JXL spec already has gainmaps... Also, just because there's a spec for using gainmaps with JPEG doesn't mean that it works well. With only 8 bits of precision, it really sucks for HDR, gainmap or no gainmap. You just get too much banding. JXL otoh is completely immune to banding, with or without gainmaps. | ||
| ▲ | kllrnohj 34 minutes ago | parent [-] | |
> With only 8 bits of precision, it really sucks for HDR, gainmap or no gainmap. You just get too much banding. This is simply not true. In fact, you get less banding than you do with 10-bit bt2020 PQ. > JXL otoh is completely immune to banding Nonsense. It has a lossy mode (which is its primary mode so to speak), so of course it has banding. Only lossless codecs can plausibly be claimed to be "immune to banding". > The JXL spec already has gainmaps... Ah looks like they added that sometime last year but decided to call it "JHGM" and also made almost no mention of this in the issue tracker, and didn't bother updating the previous feature requests asking for this that are still open. | ||