For convenience, a parameterized color space is often defined. One of the most common in computer graphics is called HSV, which has the following three components (Figure 6.21):
It would be ideal to have a representation in which the distance between two points corresponds to the amount of perceptual difference. In other words, as two points are further apart, our ability to distinguish them is increased. The distance should correspond directly to the amount of distinguishability. Vision scientists designed a representation to achieve this, resulting in the 1931 CIE color standard shown in Figure 6.22. Thus, the CIE is considered to be undistorted from a perceptual perspective. It is only two-dimensional because it disregards the brightness component, which is independent of color perception according to color matching experiments .
Steven M LaValle 2016-12-31