sy2.m

matlab下的数字图象处理例程,其中有关图片文件只要随便找个图片就可以了

RGB=imread('autumn.tif');
figure(1);
imshow(RGB);
figure(2);
I=rgb2gray(RGB);
imshow(I);
figure(3);
J=dct2(I);
imshow(log(abs(J)));
colorbar;
figure(4);
K=idct2(J);
imshow(K,[0 255]);

figure(5);
J(abs(J)<40)=0;
K=idct2(J);
imshow(K,[0 255]);
figure(6);
J(abs(J)<80)=0;
K=idct2(J);
imshow(K,[0 255]);
figure(7);
J(abs(J)<180)=0;
K=idct2(J);
imshow(K,[0 255]);