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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 2 — Feb. 1, 2014
  • pp: 338–347

Open problems in color constancy: discussion

C. van Trigt  »View Author Affiliations


JOSA A, Vol. 31, Issue 2, pp. 338-347 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000338


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Abstract

This paper discusses a number of open problems in color constancy theory whose correct solution is a prerequisite for the theory of the phenomenon. Solutions employing suitable visually meaningful versus physically meaningful basis functions (principal components) are examined. In the former case the starting point is an estimate of the first derivative of the reflectance (illuminant), essential for defining color, instead of an estimate of the reflectance (illuminant), as in the latter. Conceptual consequences are discussed. Mathematical and physical constraints are identified. We compare the results of theories that do or do not ignore them. The following questions are considered. (1) Do unique solutions of the estimation problem exist everywhere in the object-color solid belonging to the illuminant? (2) Are they physically meaningful, i.e., at least nonnegative? (3) Are they representative for reflectance and spectral distribution functions? (4) What role plays metamerism?

© 2014 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1690) Vision, color, and visual optics : Color
(330.1720) Vision, color, and visual optics : Color vision
(330.1715) Vision, color, and visual optics : Color, rendering and metamerism

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: April 23, 2013
Revised Manuscript: November 3, 2013
Manuscript Accepted: November 22, 2013
Published: January 23, 2014

Virtual Issues
Vol. 9, Iss. 4 Virtual Journal for Biomedical Optics

Citation
C. van Trigt, "Open problems in color constancy: discussion," J. Opt. Soc. Am. A 31, 338-347 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-2-338

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