> Another useful function of a “perceptually uniform” colorspace.
Not all the colourspaces are perceptually uniform nor try to be. For example, CIE XYZ is photometrically linear and appropriately so!
Not all the colourspaces are perceptually uniform nor try to be. For example, CIE XYZ is photometrically linear and appropriately so!
Y = relative luminance, XYZ are tristimulus coordinates, and x, y or u', v' are chromaticity coordinates. These are all physical rather than perceptual quantities.