JXL images created with other software show inaccurate/poor colors in dark areas when viewed in Photo 2.0.4

[Alex_M]

I'm not sure why this happens, but the JXL/JpegXL images I export from the latest official JXL encoder or through the latest version of XnView show inaccurate/poor colors in dark areas when viewed in Photo 2.0.4. I've attached 4 files - the source TIF file, the JXL exported from the TIF via XnView (quality 97, compression level 7), the JXL exported from the TIF via the official encoder (quality 97, compression level 7) and the JXL exported from TIF via Affinity Photo (quality 97). Any idea why this happens? Is this a bug with Affinity Photo or am I doing something wrong?

tif.tiff tif_converted_to_jxl_in_XnView_quality97.jxl tif_converted_to_jxl_in_AffinityPhoto_quality97.jxl tif_converted_to_jxl_in_cjxl_quality97.jxl

[Lee D]

There isn't anything that can be done at the moment, it's due to how the .jxl file data is being read. I've logged it with our developers to see if any improvements can be made, but it may be limited to XnViewMP and the latest encoder process. As I also tested with a online converter and the .jxl file downloaded displayed fine in Affinity Photo.