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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. 5 — May. 1, 2014
  • pp: 1049–1058

Illuminant estimation for color constancy: why spatial-domain methods work and the role of the color distribution

Dongliang Cheng, Dilip K. Prasad, and Michael S. Brown  »View Author Affiliations


JOSA A, Vol. 31, Issue 5, pp. 1049-1058 (2014)
http://dx.doi.org/10.1364/JOSAA.31.001049


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Abstract

Color constancy is a well-studied topic in color vision. Methods are generally categorized as (1) low-level statistical methods, (2) gamut-based methods, and (3) learning-based methods. In this work, we distinguish methods depending on whether they work directly from color values (i.e., color domain) or from values obtained from the image’s spatial information (e.g., image gradients/frequencies). We show that spatial information does not provide any additional information that cannot be obtained directly from the color distribution and that the indirect aim of spatial-domain methods is to obtain large color differences for estimating the illumination direction. This finding allows us to develop a simple and efficient illumination estimation method that chooses bright and dark pixels using a projection distance in the color distribution and then applies principal component analysis to estimate the illumination direction. Our method gives state-of-the-art results on existing public color constancy datasets as well as on our newly collected dataset (NUS dataset) containing 1736 images from eight different high-end consumer cameras.

© 2014 Optical Society of America

OCIS Codes
(040.1490) Detectors : Cameras
(150.2950) Machine vision : Illumination
(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: December 5, 2013
Revised Manuscript: March 18, 2014
Manuscript Accepted: March 20, 2014
Published: April 17, 2014

Virtual Issues
Vol. 9, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Dongliang Cheng, Dilip K. Prasad, and Michael S. Brown, "Illuminant estimation for color constancy: why spatial-domain methods work and the role of the color distribution," J. Opt. Soc. Am. A 31, 1049-1058 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-5-1049

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