图象对比度增强处理方法(二)

Enhancement Methods of Image Contrast

五、基于局部直方图或局部排序统计的自适应方法文[77]提出的图象对比度增强的非线性变换迭代法的基本思想是根据以象素(x,y)为中心的局部窗口内灰度级的最大值f_(max)和最小值F_(min)对中心象素(x,y)

This paper more completely summarizes more than sixty methods of image contrast enhancement proposed and developed in succession in the last twenty years in accordance with a large number of the relevant literatures, and consequently these methods are classified into eight categories. The basic ideas of the various methods as well as their advantages and defects are critically reviewed. Some corresponding formulae of computation and several pictures are also given. This paper will be valuable to both further inquiring into the methods of image contrast enhancement theoretically and selecting an appropriate method of image contrast enhancement in practical applications.