ch4_2_1.m

来自「常用图像处理源码合集」· M 代码 · 共 9 行

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