说明：  本实验要求编写一个计算图像直方图的程序并要求讨论直方图均衡化技术，最后对图3.8（a）进行均衡化处理。直方图是多种空间域处理技术的基础，直方图操作能有效的用于图像增强。在实验中根据直方图对应的离散函数可以编写出计算一个图像直方图的函数，直方图均衡化则是借助于直方图灰度变换实现灰度映射从而达到图像增强的目的。实验通过得到原始图像的直方图，直方图均衡化变换函数图和增强后的图像增强后图像的直方图这些实验数据来解释图像被增强的原因。
(In this study requested to prepare a procedure for calculating the image histogram and asked to discuss histogram equalization technology, the last of Figure 3.8 (a) a balanced treatment. Histogram is a variety of spatial processing technology foundation, histogram operation can be effective for image enhancement. In the experiment under the histogram corresponding discrete function can be calculated to prepare an image histogram function, histogram equalization is a means of gray-scale transformation to achieve gray histogram mapping so as to achieve the purpose of image enhancement. Experiments have been the original image through the histogram, histogram equalization transformation function maps and enhanced image after image enhancement histogram of these experimental data to explain the reasons for the image was enhanced.)