s085.m

来自「简单的数字图像处理程序」· M 代码 · 共 13 行

% 方块图二维离散付氏变换幅度谱伪彩色显示  s085
I85=zeros(256,256);
I850(124:132,124:132)=1;
I851(127:129,127:129)=1;
I852=fft2(I850);
I853=fft2(I851);
subplot(1,2,1),imshow(log(abs(I852)),[]),colormap(jet(64));
subplot(1,2,2),imshow(log(abs(I853)),[]),colormap(jet(64))