Kunlaya CHERDHIRUNKORN¹, Norimichi TSUMURA^1,2, Toshiya NAKAGUCHI¹ and Yoichi MIYAKE¹

¹Department of Information and Image Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
²PRESTO, Japan Science and Technology Corporation, 4-1-8 Honmachi, Kawaguchi, Saitama 332-0012, Japan

(Received April 20, 2005; Accepted March 6, 2006)

A spectral turn method is presented as a spectral based color correction method compatible with the standard RGB system by applying the idea of a multi-spectral method. The multi-spectral based color reproduction technique has been proposed for providing independent color of device and viewing conditions. However, it is difficult to replace the RGB devices with high cost multi-spectral devices since the latter have advanced only to the laboratory level. In the proposed method, the standard RGB values are converted into spectral information, then returned to RGB values for different viewing conditions. This process provides more accurate reproduction than the conventional forward process of the color reproduction. An experiment of psychophysical color matching was performed to evaluate the technique. The mixed chromatic adaptation model was applied to the method in the experiment, and the results showed the effectiveness of the proposed method.

Key words: color reproduction, multi-spectral imaging, sRGB, E-commerce