Feature request: CIELAB and/or CIECAM02 colorspace.

[Lypheo]

As far as I can tell, zimg currently lacks a proper perceptually uniform color space (except, arguably, ICtCp). They’d be very nice to have, imo, seeing as they appear to be quite popular with the industry and the image processing research community.

[Artoria2e5]

Eh, ICtCp needs a custom scale on Ct by 0.5 to get uniformity (Rec. 2124). Do we have that sort of option?

zimg has some xyz stuff, so it's probably not too hard to do all the cooler colorspaces.