Perceptual color difference metric for complex images based on Mahalanobis distance

F. H. Imai*, N. Tsumura, Y. Miyake

Department of Information and Image Sciences, Chiba University
1-33, Yayoi-cho, Inage-ku, Chiba 263-8522 Japan

MCSL, RIT

Journal of Electronic Imaging 10(2) (2001) pp.385-393.

Abstract
In this paper, a perceptual color difference for complex images is defined instead of the conventional color differences equations. This color difference is derived based on Mahalanobis distance by using covariance matrices for differences of each color dimensions. The covariance matrices for each class of images can be obtained by psychophysical experiments. We compared the resultant matrices for different class of images and it was possible to observe that the information in the matrix can give very useful trends and clues about which kind of transformation can minimize the perceptual difference in images when a transformation such as gamut mapping is required.

Full paper ( to appeare)
[PDF]

Conference paper
[PDF] Normichi Tsumura, Toshiki Saito, Francisco H. Imai, Hideaki Haneishi, and Yoichi Miyake, "Color Gamut Mapping based on Mahalanobis Distance for Color Reproduction of Electronic Endoscope Image under Different Illuminant," IS&T/SID's 5th Color Imaging Conference, Color Science, Systems and Appl, pp. 158-162(Scottsdale, Arizona, 1997.11.19).

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