C. Connolly, THE RELATIONSHIP BETWEEN COLOR METRICS AND THE APPEARANCE OF 3-DIMENSIONAL COLORED OBJECTS, Color research and application, 21(5), 1996, pp. 331-337
This article explores the relationship between the colour descriptors
used in classical colour theory and machine vision, and the appearance
of three-dimensional objects exhibiting geometric lighting effects. V
arious colour transformation equations are analyzed to determine their
response to intensity changes, and their perceptual uniformity. It is
suggested that a logarithmic chromaticity plane has advantages for th
e processing of images of three-dimensional scenes. The logarithmic fu
nction removes any intensity variation from the chromaticity metrics,
and provides a chromaticity plane that is uniform with respect to hue,
and reasonably uniform in chroma. Evidence of two types-mathematical
and experimental-is given in support of this claim. (C) 1996 John Wile
y & Sons, Inc.