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Today, I am not aware of LUV being used anywhere - LAB has won the battle between the two and is used even for displays. Either that, or, where higher performance is needed in terms of perceptual prediction accuracy, CIECAM02 (a color appearance model) is used. It is significantly more complex, but predicts more visual phenomena and allows for taking viewing conditions better into account.
So, I'd say use LAB if what it does is good enough and CIECAM02 if it fails (e.g., for gamut mapping LAB has serious hue non-uniformity)."
So, who's up for coding CIECAM02 color transformations, whatever that may be? ;-)