增强是夜视图象处理的一种重要方法,而直方图均衡是最经典的图象信息增强算法之一,但将它直接应用于夜视图象处理有如下缺点:(1)丢失原始图象的亮度信息;(2)处理过程中有简并现象发生.该文结合夜视图象的特点,提出了一种保持亮度和克服简并的算法,即采用不同灰度区间分别均衡,并且采用设定最小灰度间隔和最

Enhancement is one of the important methods of Low-light-level image processing. The Histogram- Equlization(HE), a traditional enhancement algorithm, has several drawbacks to process such images. (1) The brightness information will be lost during the process of HE. (2) Degeneracy will happened during the process. This paper presents an algorithm that can preserve brightness and gray levels, which may decrease the disadvantages of the traditional methods.