Abstract

An approximate model of the Munsell color space in terms of dominant wavelength and colorimetric purity is described. This approximation space describes the Value and Chroma relations as functions of chromaticity and the Chroma relations as a function of colorimetric purity, but does not describe the Hue spacing. A single curve describes (approximately) the chromaticities in all Chroma circles and this curve is the same as that describing the threshold between those colors which appear to contain gray and those that appear to be fluorescent (G0) as described in Part I. The loci of the G0 colors and of colors with constant gray content are also described for the approximation space.

© 1968 Optical Society of America

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