How do I generate a two dimensional Fourier Transform with a given image in a .mat file?
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I don't even know how to start. Help will be much appreciated.
Thank you
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Konstantinos Sofos
le 9 Mar 2015
Hi,
Mathworks documentation is excellent and is always a good point to start. Have a look here Fourier Transform and Image Transforms
Assuming that I is your input image and F is its Fourier Transform (i.e. F = fft2(I))
You can use this code:
F = fftshift(F); % Center FFT
F = abs(F); % Get the magnitude
F = log(F+1); % Use log, for perceptual scaling, and +1 since log(0) is undefined
F = mat2gray(F); % Use mat2gray to scale the image between 0 and 1
imshow(F,[]); % Display the result
Regards
Image Analyst
le 9 Mar 2015
Attached are two of my FFT2 demos for you.
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Image Analyst
le 9 Mar 2015
You forgot to attach your .mat file and your .m file so I'm unable to do anything to help you (yet).
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