Adaptive Image Enhancement Algorithm Based on Bi-histogram Equalization
Wu Ying · Jisuanji gongcheng · 2011
This paper proposes an adaptive image enhancement algorithm based on Brightness preserving Bi-Histogram Equalization(BBHE).An appropriate threshold is selected to cut the image,the threshold considers the entropy and the difference of mean brightness between the input and output image.Based on the threshold,bi-histogram equalization and gray lever homogenization take place.The algorithm makes the error mean brightness as small as possible and entropy of output image as large as possible.Meanwhile,it can provide over-enhancement.Experimental results prove that the algorithm has better performance on image enhancement.