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 histogram equalization. Based on local histogram statistics 4. Enhanced image. (Without using matlab function comes with high efficiency of program execution)