中文说明：函数对输入图像进行邻域窗口大小可变的自适应中值滤波，包含两个子程序，程序先执行排序，然后再进行中值滤波。对于图像处理效果不错，结果已经验证。
English Description：
The function performs an adaptive median filter with variable neighborhood window size on the input image, including two subroutines. The program performs sorting first, and then median filtering. For image processing effect is good, the results have been verified.