fly1.m

来自「包括MATLAB7.0实用指南（下）中所有例子的源代码」· M 代码 · 共 15 行

f=zeros(30,30);
f(5:24,13:17)=1;
imshow(f,'notruesize')
%F=fft2(f);
F=fft2(f,256,256);%0tianch
F2=log(abs(F));
imshow(F2,[-1 5],'notruesize')
colormap(jet);
colorbar
F=fft2(f,256,256);%0tianch
F3=fftshift(F);
figure
imshow(log(abs(F3)),[-1 5],'notruesize')
colormap(jet);
colorbar