Color constancy using bright-neutral pixels

Yanfang Wang; Yupin Luo

doi:10.1117/1.JEI.23.2.023011

26 March 2014 Color constancy using bright-neutral pixels

Yanfang Wang, Yupin Luo

Author Affiliations +

Journal of Electronic Imaging, Vol. 23, Issue 2, 023011 (March 2014). https://doi.org/10.1117/1.JEI.23.2.023011

Abstract

An effective illuminant-estimation approach for color constancy is proposed. Bright and near-neutral pixels are selected to jointly represent the illuminant color and utilized for illuminant estimation. To assess the representing capability of pixels, bright-neutral strength (BNS) is proposed by combining pixel chroma and brightness. Accordingly, a certain percentage of pixels with the largest BNS is selected to be the representative set. For every input image, a proper percentage value is determined via an iterative strategy by seeking the optimal color-corrected image. To compare various color-corrected images of an input image, image color-cast degree (ICCD) is devised using means and standard deviations of RGB channels. Experimental evaluation on standard real-world datasets validates the effectiveness of the proposed approach.

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Yanfang Wang and Yupin Luo "Color constancy using bright-neutral pixels," Journal of Electronic Imaging 23(2), 023011 (26 March 2014). https://doi.org/10.1117/1.JEI.23.2.023011

Published: 26 March 2014

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