figure7.m

来自「是一本教科书的各个章节的源程序代码,适合初学数字图像的人」· M 代码 · 共 11 行

RGB=imread('autumn.tif');
I=rgb2gray(RGB);
imshow(I);
figure(2);
J=dct2(I);
imshow(log(abs(J)),[]), colormap(jet(64)), colorbar;
figure(3);
J(abs(J)<10)=0;
K=idct2(J)/255;
imshow(K);