matlab读取图象,并对图象进行加处理

A = double(imread('lena.bmp'));

figure(1);

imshow(uint8(A));

imgsize = size(A,1)*size(A,2);

seed = 123;

rand('state',seed);

pn=rand(size(A,1),size(A,2));

AW = A + pn ;

figure(2);

imshow(uint8(AW));

figure(3);

imshow(uint8(pn));

cor1 = sum(sum(pn.*A))