Is there any reason we don't have a xyz to cieluv transformation in skimage.color?

[jsundram]

I'd like to do some color calculations in a perceptually uniform color space, but XYZ is about as good as it gets in skimage.color, as far as I can tell.

There's a formula (and an inversion) on easyrgb.com, but I'm hesitant to add them if there's a good reason they weren't included.

[JDWarner]

The only reason I could think of would be if they were IP encumbered in some way. My guess is color spaces aren't, but this isn't really my field; hopefully someone can confirm. I'm fairly sure we don't have grievances against particular colorspaces.

Assuming the definition of CIE-L*uv is considered public information, I'd say the more conversions we have the better!

[stefanv]

I don't think there's any specific reason--just that no one wrote up the
code. At the previous SciPy, we added CIELAB (quite similar,
http://en.wikipedia.org/wiki/CIELUV). Feel free to do a PR!

[mrterry]

We recently got CIELCH and a couple color distance metrics (#665). CIELUV would probably fit nicely those. At the least the deltaE functions may be useful for measure color distances in a perceptually uniform sort of way.

[jni]

Closed as CIELUV is now in skimage... And has been for a while!