说明::i1=imread('C:\Users\Administrator\Desktop\图像处理\T1.JPG');
i1=double(i1)/255;
figure(1)
imshow(i1);title('原图');
i2=fft2(i1);
figure(2)
imshow(i2);title('傅里叶变换后');
if size(i1, 3) > 1
G = im2double(rgb2gray(i1));
else
G = im2double
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