本文提出了的方法通过将直方图均衡作为直方图规定的特例考虑，既可实现直方图均衡又可实现直方图规定，从而实现了这2种方法的统一，而且直方图规定的结果好于文献[1]方法。

In general, histogram equalization and histogram specification are regarded as two different histogram modification techniques in image enhancement because the latter is generally dependent on the former in the traditional method. In this paper, a new method for histogram modification is reported, in which histogram equalization is regarded as a special case of histogram specification, so it can be applied to either histogram equalization or histogram specification. And in the case of histogram specification, the result of the new method is better than that of the traditional method.