fftshift in frequency filtering

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Gova ReDDy
Gova ReDDy le 25 Mai 2012
Does it mandatory to shift the frequency components using fftshift for a fourier transformed image before applying lowpass or gaussian LPF?
Cant we directly perform frequency filtering without using fftshift of fft image.
can anyone explain me the difference? thanks in advance

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Stephen
Stephen le 25 Mai 2012
I would imagine that you could directly apply low pass, but I don't really know. This is an interesting question. What happened when you tried doing it?

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