Abstract
Color information plays a key role in the research fields of object recognition and image retrieval. However, the actual color varies by the conditions of illumination, especially the open natural daylight. Four different color constancy schemes are proposed in the paper to minimize the effects of open illumination conditions. (1) The color constancy scheme based on the image statistics is proposed, which includes the color cast detection and removal. (2) The color constancy scheme based on the color temperature curve is proposed, which combines Gaussian model with linear fitting to estimate color temperature curve. (3) The color constancy scheme based on the double exposure theory is proposed, which is able to reproduce a color image under typical illumination. (4) According to the concepts of supervised learning, the supervised color constancy scheme is proposed. The transformation of color values from unknown illumination to typical illumination is solved by improved Support Vector Regression (SVR).
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Supported by the National Natural Science Foundation of China (No.60431020), the Natural Science Foundation of Beijing (No.3052005), and the Ph.D. Foundation of Ministry of Education (No.20040005015).
Communication author: Xu Xiaozhao, born in 1978, male, Ph.D. candidate.
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Xu, X., Zhuo, L., Zhang, J. et al. Research on color constancy under open illumination conditions. J. Electron.(China) 26, 681–686 (2009). https://doi.org/10.1007/s11767-009-0019-1
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DOI: https://doi.org/10.1007/s11767-009-0019-1