Color image enhancement to restore natural color by excluding the effect of ambient illumination is important in recent image processing. In this paper, a color image enhancement method based on Land's color constancy is proposed. Since the color constancy processing preserves only hue while reducing the dynamic range of lightness and saturation, the technique of dynamic range increase in the IHS coordinate system is used to compensate them. The proposed method increases lightness and saturation simultaneously.
Jeong-Yeop Kim, Sung-Ho Bae, Eung-Joo Lee, Yeong-Ho Ha, "Color Image Enhancement Based on Land's Color Constancy Algorithm" in Proc. IS&T 2nd Color and Imaging Conf., 1994, pp 131 - 134, https://doi.org/10.2352/CIC.1994.2.1.art00036