MSR对灰度图足够了，但对彩色图像还不是特别理想。颜色不饱和有时还很严重。在少数情况下，违反灰度分布的前提会导致不可预料的颜色扭曲。因此，我们考虑一种能提供好的色调再现的颜色恢复算法。当然我们希望该算法要保持可以接受的颜色定常，因为这是Retinex的基本目标之一。-MSR enough for grayscale, but color images is not particularly desirable. Unsaturated colors are sometimes very serious. In a few cases, in violation of the premise of gray distribution of color will lead to unpredictable distortions. Therefore, we consider a good tone reproduction can provide the color restoration algorithm. Of course, we hope that the algorithm is to maintain acceptable color dependent, because it is a basic goal of Retinex.