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Supposing i have a 1-D or 2-D data...how do i get the spatial frequencies from the FFT expression ( FFT results in a spectrum plotted against sample count)..

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Wayne King
Wayne King 2011-12-24

1 个投票

Hi, See this tutorial (which ImageAnalyst provided in an earlier post):
http://sharp.bu.edu/~slehar/fourier/fourier.html

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David Young
David Young 2011-12-24

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From this demo:
The Fourier component corresponding to index j has j-1 cycles within the length of the original data.
If there are N data points, the component corresponding to index j has the same frequency as the component corresponding to index N-j+2.

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