说明：  对图像进行滤波的几种算法集锦，并在同幅图中显示，便于对比其各种效果，另外给出了一副彩色图像的滤波效果，还请高手指点。
(Image filtering allehanda Algorithms, and at the same pictures shown to facilitate comparison of its various effects, another is given a color image filter effects, also requested the expert advice.)