Correction of Color Saturation for Tone Mapping Operator

This article reviews the problems of color saturation correction during dynamic range compression of images. Special attention is drawn to emulation of human vision and photo cameras effects during processing of the images which have very bright areas (with brightness more than an order of magnitude greater than average brightness of the rest of the image). A method of desaturation of the brightest parts of images is suggested. This method provides lowering of the color saturation of each pixel depending on the pixel brightness. The improved method lowers saturation only of the brightest parts of an image. The size of the desaturated part of the image should not exceed 25% of the size of an entire image.