Research on color constancy computation based on YCbCr color space and gray surface

Hong Wang; Jianfeng Yang; Bin Xue; Xingtao Yan; Xiaofen Liang

doi:10.1117/12.2070658

24 November 2014 Research on color constancy computation based on YCbCr color space and gray surface

Hong Wang, Jianfeng Yang, Bin Xue, Xingtao Yan, Xiaofen Liang

Proceedings Volume 9301, International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition; 93010V (2014) https://doi.org/10.1117/12.2070658
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Color constancy is of important for many computer vision applications, such as image classification, color object recognition, object tracking and so on. But unlike the human visual system, imaging device cannot be able to compute color constant descriptors which do not vary with the color of the illuminant, so solving color constancy problem is necessary. In the calculation of color constancy, illuminant estimation is the key. Because grey surfaces can perfectly reflect the color of the scene illumination, many methods have been proposed to identify grey surfaces to estimate the illuminant. But they either rely on the camera’s parameters, lacking universality, or work inaccurate in worse conditions. In order to solve these problems, in this paper, an iterative method is proposed. The quality of the proposed method is tested and compared to the previous color constancy methods on the Macbeth Chart and two data sets of synthetic and real images. Through MATLAB simulation, experimental pictures and quantitative data for performance evaluation were gotten. The simulated results show that the proposed algorithm is accurate and efficient in identification of the grey surfaces, even in worse condition. And it performs well in color constancy computation on both synthetic and real images.

Citation Download Citation

Hong Wang, Jianfeng Yang, Bin Xue, Xingtao Yan, and Xiaofen Liang "Research on color constancy computation based on YCbCr color space and gray surface", Proc. SPIE 9301, International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition, 93010V (24 November 2014); https://doi.org/10.1117/12.2070658

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KEYWORDS

Image processing

Iterative methods

Chromium

Computer simulations

RGB color model

Cameras

Color image processing

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