a=imread(‘cameraman.tif’);
imshow(a);
b=imnoise(a,’salt & pepper’);
c=imnoise(a,’gaussian‘);
d=imnoise(a,’speckle‘);
figure
subplot(2,2,1);imshow(b);
subplot(2,2,2);imshow(c);
subplot(2,2,3);imshow(d);
h1=(1/9)*ones(3,3);
h2=(1/25)*ones(5,5);
b1=conv2(double(b),h1,’same’);
b2=conv2(double(b),h2,’same’);
figure
imshow(uint8(b1));
figure
imshow(uint8(b2));
imshow(a);
b=imnoise(a,’salt & pepper’);
c=imnoise(a,’gaussian‘);
d=imnoise(a,’speckle‘);
figure
subplot(2,2,1);imshow(b);
subplot(2,2,2);imshow(c);
subplot(2,2,3);imshow(d);
h1=(1/9)*ones(3,3);
h2=(1/25)*ones(5,5);
b1=conv2(double(b),h1,’same’);
b2=conv2(double(b),h2,’same’);
figure
imshow(uint8(b1));
figure
imshow(uint8(b2));
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