1.直方图均衡化验证。2.调用自定义函数，对4幅花粉图象进行全局直方图均衡化。3.方格图象的局部直方图均衡化。4.图象的基于直方图统计的局部增强。(不使用matlab自带函数，程序执行效率高)-1. histogram equalization verification. 2. Call a custom function on four globally pollen image histogram equalization. 3. checkered image local histogra