从国外网站下载的代码，中值滤波可以很好地过滤掉各种噪音数据，另外，还可以很好地保留边缘信息。此程序可以对一维二维三维信号，进行中值滤波，完成噪声的去除-From abroad website code, median filtering can filter out a good variety of noise data, can also be good to retain the edge information. This procedure can be one-dimensional two-dimensional three-dimensional signal, for median filtering, noise removal completed