Human vision can see the very wide range of luminance scenes with keeping the color constancy. This paper is addressed to improve the image appearance based on Multi-Scale Retinex (
Hiroaki Kotera, Masafumi Fujita, "Appearance Improvement of Color Image by Adaptive Scale-Gain Retinex Model" in Proc. IS&T 10th Color and Imaging Conf., 2002, pp 166 - 171, https://doi.org/10.2352/CIC.2002.10.1.art00032