example8_12.m

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%以saturn.tif为例，加入椒盐噪声，并在MATLAB中调用B = filter2(h,A)实现均值过滤器
I=imread('eight.tif');
J=imnoise(I,'salt &pepper',0.02);
imshow(I)
figure,imshow(J)
K1=filter2(fspecial('average',3),J)/255;
K2=filter2(fspecial('average',5),J)/255;
K3=filter2(fspecial('average',7),J)/255;
figure,imshow(K1)
figure,imshow(K2)
figure,imshow(K3)