说明：  matlab编写的Bilateral方法改进中值滤波的程序，运行发现在设置合适参数的情况下能够保留图像的边缘同时起到一定的去噪效果。空域处理。
(matlab prepared Bilateral median filtering method to improve the program, run to set the appropriate parameters found in the case to the edge while preserving image denoising play a certain effect. Spatial processing.)