Problematic HDR image

[o-l-a-v]

This image:

• Cat: https://github.com/gwy15/hdr/blob/main/IMG01623-HDR.jxl
  • Found here: https://github.com/d2phap/ImageGlass/issues/1677#issuecomment-1819045271

Looks so different from GIMP that it seems something with colorspace isn't right.

Screenshot with Firefox, Chrome and GIMP.

In my opinion:

• Firefox looks too bright
• Chrome looks green/yellow tinted

[tirr-c]

I think it's because different algorithm is used for tone mapping.

• Firefox: jxl-oxide-wasm detects Firefox and requests jxl-oxide to do tone mapping. jxl-oxide uses Rec. 2408 YRGB method with peak detection (instead of using signalled peak luminance), so it may appear brighter than needed.
• Chrome: jxl-oxide-wasm passes decoded HDR image as-is, so Chrome performs tone mapping. IIRC it uses different tone mapping algorithm, so colors look different.
• GIMP: It seems to use Rec. 2408 without peak detection to me, not sure though.

Unfortunately there's no single correct way to tone map to SDR. I suppose it will look better without peak detection though.