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Journal of Electronic Imaging

Color constancy using bright-neutral pixels
Author(s): Yanfang Wang; Yupin Luo
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Paper 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.

Paper Details

Date Published: 26 March 2014
PDF: 12 pages
J. Electron. Imag. 23(2) 023011 doi: 10.1117/1.JEI.23.2.023011
Published in: Journal of Electronic Imaging Volume 23, Issue 2
Show Author Affiliations
Yanfang Wang, Tsinghua Univ. (China)
Yupin Luo, Tsinghua Univ. (China)

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