[Insight-users] FFT in 3D

[kent williams]

If you look at this ITK test:
Insight/Testing/Code/Algorithms/itkFFTTest.cxx, it computes 3D FFTs.
This is a regression test that is run nightly on dozens of computers.

The ITK FFT filters have been coded to take care of the setup needed
to compute FFTs.  Since you're posting this message to the Insight
Users mailing list, I assume you are trying to compute the FFT of ITK
images. This is simple to do with the ITK FFT filters.

If you are using a platform that FFTW supports, it really is the best
performing implementation around. We don't include it with Insight
because its license (GPL) is incompatible with ITK's license (BSD).
FFTW is an order of magnitude faster than the VNL routines.

On Wed, Jul 23, 2008 at 7:54 AM, alexandre govignon
<govignon.alexandre at gmail.com> wrote:
> Hi ITK users
>
> I want to use vnl FFT classes for computing the FFT.
> Actually i want to make a FFT and inversed FFT in 3D...
> But it doesn't work... the error: illegal number of array.
>
> I just want to know if it s possible to make a 3D FFT and 3D inversed
> FFT directly, without using 2D slice, and without using FFTW....?
>
> Kind regards
> Alexandre.
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