[Insight-users] FFT problem

[David Doria]

On Mon, Aug 2, 2010 at 9:09 AM, Yu, Yang <yang.yu at philips.com> wrote:
> Dear all,
>
>
>
> I come across with a problem about implementing fast Fourier transform of 2D
> image. The output image (which is almost total gray) is not what I expected.
> I just simply use the codes provided by ITK examples
>
>
>
> ----FFTDirectInverse.cxx
>
> ----FFTImageFilter.cxx.
>
>
>
> The input images are Data\Circle.png for FFTDirectInverse.cxx, and
> Data\FatMRISlice.png for FFTImageFilter.cxx.
>
>
>
> The output image is viewed using the SNAP.
>
>
>
> I don’t know which part is wrong. Anyone who have solved this kind of
> problem before?!
>
>
>
> Kind regards
>
> Yang YU

Did you ever solve this issue? I am seeing the same thing (the outputs
are all solid gray images):

http://www.itk.org/Wiki/ITK/Examples/SpectralAnalysis/VnlFFTRealToComplexConjugateImageFilter

Thanks,

David