A new two-stage illumination estimation method based on the concept of rank is presented. The method first estimates the illuminant locally in subwindows using a ranking of digital counts in each color channel and then combines local subwindow estimates again based on a ranking of the local estimates. The proposed method unifies the MaxRGB and Grayworld methods. Despite its simplicity, the performance of the method is found to be competitive with other state-of-the art methods for estimating the chromaticity of the overall scene illumination.
Presented at the CIC'21 Color Imaging Conference, November 2013.
Shi, L., and Funt, B. "Rank-Based Illumination Estimation." Proc. CIC'21 Twenty-first IS&T Color Imaging Conference, Albuquerque, Nov. 2013.
Proc. CIC'21 Twenty-first Color Imaging Conference
Rank-Based Illumination Estimation
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