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Color constancy using bright-neutral pixels

[+] Author Affiliations
Yanfang Wang

Tsinghua University, Department of Automation, Tsinghua National Laboratory for Information Science and Technology, Beijing 100084, China

Yupin Luo

Tsinghua University, Department of Automation, Tsinghua National Laboratory for Information Science and Technology, Beijing 100084, China

J. Electron. Imaging. 23(2), 023011 (Mar 26, 2014). doi:10.1117/1.JEI.23.2.023011
History: Received August 21, 2013; Revised February 12, 2014; Accepted February 13, 2014
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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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Citation

Yanfang Wang and Yupin Luo
"Color constancy using bright-neutral pixels", J. Electron. Imaging. 23(2), 023011 (Mar 26, 2014). ; http://dx.doi.org/10.1117/1.JEI.23.2.023011


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