采用直方图求中值的高效中值滤波算法。使用滑动窗口的技术加快程序执行速度。变化阈值及方法即可生成最大值、最小值滤波算法。-Using a histogram of the values ​ ​ in seeking efficient median filtering algorithm. Use technology to accelerate the sliding window program execution speed. Change threshold and t