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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 4 — Mar. 29, 2012

Predicting frequency of metamerism in natural scenes by entropy of colors

Gaoyang Feng and David H. Foster  »View Author Affiliations


JOSA A, Vol. 29, Issue 2, pp. A200-A208 (2012)
http://dx.doi.org/10.1364/JOSAA.29.00A200


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Abstract

Estimating the frequency of metameric surfaces in natural scenes usually requires many comparisons of surface colors to determine which are visually indistinguishable under one light but distinguishable—by a certain criterion degree—under another. The aim here was to test the predictive power of a simpler approach to estimation based on the entropy of colors. In simulations with 50 hyperspectral images of natural scenes, the logarithm of the observed relative frequency of metamerism in each scene under two successive daylights was regressed on combinations of the estimated Shannon differential entropies of the colors of the scene under the same two daylights. The regression was strong, and it remained so when restricted to the estimated differential entropy under just the first daylight, providing that the criterion degree of metamerism was limited. When the criterion degree was made more extreme, however, the restricted regression failed. A possible explanation of the predictive power of differential entropy is briefly considered.

© 2012 Optical Society of America

OCIS Codes
(330.1690) Vision, color, and visual optics : Color
(330.1720) Vision, color, and visual optics : Color vision
(330.1880) Vision, color, and visual optics : Detection
(330.4060) Vision, color, and visual optics : Vision modeling
(330.1715) Vision, color, and visual optics : Color, rendering and metamerism
(110.3055) Imaging systems : Information theoretical analysis

ToC Category:
Color in natural or complex scenes

History
Original Manuscript: September 1, 2011
Revised Manuscript: November 15, 2011
Manuscript Accepted: November 17, 2011
Published: January 26, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Gaoyang Feng and David H. Foster, "Predicting frequency of metamerism in natural scenes by entropy of colors," J. Opt. Soc. Am. A 29, A200-A208 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-29-2-A200

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