[Insight-users] FFTW

[Renaud Isabelle]

Thanks Jesse. I totally agree about the lack of documentation. 
   
  I think I will give up using itk FFTW as well, for the second time! 
   
  I would like only to use Vnl version, however, it seems this one produces the wrong result. 
   
  Could you tell me on what you tried to make itk FFTW work: Windows with Microsoft Visual C++? 
   
  Isabelle

Jesse C Cronce <croncejc at mrctr.upmc.edu> a écrit :
  I tried using the fft functionality provided by the different filters
and was never able to get it to work. What I eventually did was create
an array of the data I wanted to perform FFT on, call the library stuff
myself, and then import the results back into an image. 

This isn't to say that the fft code in ITK doesn't work, but there's not
nearly enough documentation for me (a nube) to get it right, so I went
the long route. You can also download the octave tool and see how they
do fft.

On Thu, 2005-11-17 at 17:22 +0100, Renaud Isabelle wrote:
> Hi, 
> 
> I have just downloaded and installed FFTW on my computer.
> 
> Now, I see that there were some modifications about using FFTW witk
> ITK: No need to define USE_FFTW but USE_FFTWD and USE_FFTWF instead?!
> 
> Could someone tell me which steps I have to follow to use
> itkFFTWRealToComplexConjugateImageFilter in my own project? 
> 
> BTW, I don't understand why I can use
> itkVnlFFTRealToComplexConjugateImageFilter like that and can't do the
> same way with itkFFTWRealToComplexConjugateImageFilter. While
> compiling my own project calling 
> typedef itk::FFTWRealToComplexConjugateImageFilter
> FFTFilter; it says that FFTWRealToComplexConjugateImageFilter is not a
> member of itk. What should I do exactly to make it a member?
> 
> Please help me to manage with all of this. This is quite urgent and I
> can't find any help on the net that could satisfy me.
> 
> Isabelle 
> 
> 
> 
> 
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