这是图像去噪的实现函数，有均值滤波，中值滤波，高斯滤波，函数均是自己编写的函数，没有调用,且有自己设计的函数与系统函数效果的对比。课程设计所写，能直接运行-This is the realization of image de-noising function, there are mean filtering, median filtering, Gaussian filtering functions are functions I have written, there is no cal