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fftconvol

$ \bigcirc$Name


fftconvol 2D Fourier-convolution of a fimage




$ \bigcirc$Command Synopsis


fftconvol in filter out



in : Input Fimage

filter : convolution filter in Fourier domain (Fimage)

out : Output Fimage




$ \bigcirc$Function Summary


Fimage fftconvol (in , filter , out )

Fimage in , filter , out ;




$ \bigcirc$Description


This module implements a convolution in Fourier domain by a real kernel. The Fourier Transform of in is computed, multiplied by kernel, and then the inverse Fourier Transform of the result yields the Fimage out. In other words,

$\displaystyle \widehat{{out}}$(p, q) = $\displaystyle \widehat{{in}}$(p, q) . filter(p, q).

The dimensions of in and filter must be equal, and powers of two.




$ \bigcirc$See Also


fft2d.




$ \bigcirc$Version 1.0


Last Modification date : Thu Apr 15 00:54:40 2004


$ \bigcirc$Author


Lionel Moisan






next up previous contents index
Next: fftgrad Up: Reference Previous: fft2dview   Contents   Index
mw 2004-05-05