Comment by mattdesl

I’ve done some color quantization tests with HyAB and OKLab on this same image. A couple notes:

- what works well for this image might not work well for other images! I learned the hard way after lots of testing on this image, only to find things that did not generalize well.

- parametrizing the AB plane weight is pretty useful for color quantization; I’ve found some images will be best with more weight given to colour, and other images need more weight given to tone. OKLab creator suggests a factor of 2 in deltaEOK[1] but again this is something that should be adjustable IMHO..

- there’s another interesting and efficient color space (poorly named) sUCS and sCAM[2] that boasts impressive results in their paper for tasks like this. Although I’ve found it not much better for my needs than OKLab in my brief tests[3] (and note, both color spaces are derived using CIEDE2000)

[1] https://github.com/color-js/color.js/blob/9d812464aa318a9b47...

[2] https://opg.optica.org/oe/fulltext.cfm?uri=oe-32-3-3100&id=5...

[3] https://x.com/mattdesl/status/1902699888057446670