给定一幅图象，输出其直方图；给定一个线性变换函数，实现图象的灰度拉伸，实现对图象的均衡化。-Given an image, the output of its histogram given a linear transformation function to realize the gray-scale image stretching to achieve the equalization of image.

数学指派问题的经典求解算法 可以用于图像处理，做位姿估计时 特征对应点的匹配 - MUNKRES Munkres (Hungarian) Algorithm for Linear Assignment Problem.