imnoise.m

matlab中产生常用的噪声

A=imread('lena.bmp');
subplot(121);
imshow(A);
b=double(A);
[M,N]=size(A);
for i=1:M
    for j=1:N
        if rem(12,b(i,j))==0
            b(i,j)=0;
        end
    end
end
subplot(122);
imshow(b);