Abstract
In this paper, we propose a new adaptive histogram equalization (HE) method. We apply the DRSHE method to several blocks of an image in order to improve the regional image contrast with automatic parameter setting and its computational time. We compared the processed image of our method with those of the various conventional HE methods. We have obtained the best image that is close to the image by the Retinex method which is considered to be the best contrast enhancement technology. The computational time is an important advantage of the proposed method. It is much smaller than that of the Retinex method and the local HE method. The automatic parameter setting is another important advantage of the proposed method because many conventional HE methods require the parameter setting in accordance with each image.
