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2D Fourier Transforms

2D Fourier Transforms

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In words, the distance between samples must be smaller than half a wavelength of the highest frequency in the signal. original signal spectrum down-sampled spectrum for up-sampled and low-pass filtered Here the replicas can be isolated by an ideal low-pass filter (the dotted pass-band), so the original signal can be perfectly reconstructed ...

  Between, Transform, Fourier, 2d fourier transforms

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