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Unique hue loci and implications

Unique hue loci and implications Unique hue loci of red, yellow, green, and blue were obtained for lights of 0.5 and 2 cd. m‐2 from five normal color vision subjects. Most loci curved on the chromaticity diagram. This result excludes linear equations of colormatching functions as candidates for spectral sensitivity functions of opponent color systems, (r/g)λ and (y/b)λ. The chromatic valence curves of two opponent color systems obtained by the so‐called cancellation experiment were analyzed in relation to the unique hue loci and it was shown that the appearance of the valence curves can be manipulated at will by choosing the cancellation light at various points on the chromaticity diagram. A similar manipulation was also demonstrated for the additivity property of chromatic valence and it was made clear that no unique solution is obtainable. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Color Research & Application Wiley

Unique hue loci and implications

Color Research & Application , Volume 14 (6) – Dec 1, 1989

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References (22)

Publisher
Wiley
Copyright
Copyright © 1989 Wiley Periodicals, Inc., A Wiley Company
ISSN
0361-2317
eISSN
1520-6378
DOI
10.1002/col.5080140609
Publisher site
See Article on Publisher Site

Abstract

Unique hue loci of red, yellow, green, and blue were obtained for lights of 0.5 and 2 cd. m‐2 from five normal color vision subjects. Most loci curved on the chromaticity diagram. This result excludes linear equations of colormatching functions as candidates for spectral sensitivity functions of opponent color systems, (r/g)λ and (y/b)λ. The chromatic valence curves of two opponent color systems obtained by the so‐called cancellation experiment were analyzed in relation to the unique hue loci and it was shown that the appearance of the valence curves can be manipulated at will by choosing the cancellation light at various points on the chromaticity diagram. A similar manipulation was also demonstrated for the additivity property of chromatic valence and it was made clear that no unique solution is obtainable.

Journal

Color Research & ApplicationWiley

Published: Dec 1, 1989

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