compare matlab fft2 and FFTW result
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For an real 2d input matrix I with dimension (M, N), fft2(I) will produce a complex specturm S (M, N). However, FFTW only generate a subset of the specturm S1 (M, (N/2+1)). How should I fill up the remaining of the FFTW spectrum to get the same specturm as matlab fft2?
2 Comments
Walter Roberson
on 13 Aug 2023
probably fliplr(conj(S1(:, 2:end)) but you will need to adjust that slightly if N is even
JUn Tang
on 15 Aug 2023
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on 15 Aug 2023
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