ABSTRACT
As shown in Chapter 7, due to the trichromatic nature of the human visual system, color may be represented with a color vector consisting of three numbers, or tristimulus values. The CIE XYZ color space is derived from spectral power distributions by means of integration with three color-matching functions. These color-matching functions can be considered approximate linear transformations of the human cone sensitivities. For the XYZ color space, the Y channel was derived to be identical with the photopic luminance response function.
