本程序可实现图像平滑，其主要目的是为了减少噪声。本程序中，我们首先对图像加了一个较大的白噪声，之后用中值对含噪图像进行处理。-This procedure can realize smooth image, and its main purpose is to reduce the noise. This procedure, we first added a larger image of the white noise, followed by in the value of the dea