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Number of discernible object colors is a conundrum |
JOSA A, Vol. 30, Issue 2, pp. 264-277 (2013)
http://dx.doi.org/10.1364/JOSAA.30.000264
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Abstract
Widely varying estimates of the number of discernible object colors have been made by using various methods over the past 100 years. To clarify the source of the discrepancies in the previous, inconsistent estimates, the number of discernible object colors is estimated over a wide range of color temperatures and illuminance levels using several chromatic adaptation models, color spaces, and color difference limens. Efficient and accurate models are used to compute optimal-color solids and count the number of discernible colors. A comprehensive simulation reveals limitations in the ability of current color appearance models to estimate the number of discernible colors even if the color solid is smaller than the optimal-color solid. The estimates depend on the color appearance model, color space, and color difference limen used. The fundamental problem lies in the von Kries-type chromatic adaptation transforms, which have an unknown effect on the ranking of the number of discernible colors at different color temperatures.
© 2013 Optical Society of America
OCIS Codes
(120.5240) Instrumentation, measurement, and metrology : Photometry
(230.6080) Optical devices : Sources
(300.6170) Spectroscopy : Spectra
(330.1730) Vision, color, and visual optics : Colorimetry
(330.4060) Vision, color, and visual optics : Vision modeling
(330.5020) Vision, color, and visual optics : Perception psychology
ToC Category:
Vision, Color, and Visual Optics
History
Original Manuscript: June 15, 2012
Revised Manuscript: December 19, 2012
Manuscript Accepted: December 24, 2012
Published: January 31, 2013
Virtual Issues
Vol. 8, Iss. 3 Virtual Journal for Biomedical Optics
Citation
Kenichiro Masaoka, Roy S. Berns, Mark D. Fairchild, and Farhad Moghareh Abed, "Number of discernible object colors is a conundrum," J. Opt. Soc. Am. A 30, 264-277 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-2-264
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