[Insight-users] FFT and ITK

[Cory Quammen]

Hi Tinashe,

I'm CC'ing the ITK users list so that others may benefit. I monitor that
list and likely would have responded to you, but I haven't seen any emails
from you on the list.

In ITK version 4, we renamed the FFT-related classes to hopefully better
names. Please see the migration guide page for more details on what the new
names of the classes are and how to update your code:

http://itk.org/migrationv4/index.php?action=artikel&cat=3&id=92&artlang=en&highlight=fft

Basically, the name mapping is

{FFTW | Vnl}RealToComplexConjugateImageFilter => {FFTW |
Vnl}ForwardFFTImageFilter
{FFTW | Vnl}ComplexConjugateToRealImageFilter => {FFTW |
Vnl}InverseFFTImageFilter

Also, note that the output of the Forward filters now produces the full
discrete Fourier transform (not just the redundant half) whether FFTW or
VNL is used. See this migration page for more details:

http://itk.org/migrationv4/index.php?action=artikel&cat=3&id=118&artlang=en

If you want to get only the non-redundant half of the transformed image,
see the classes { FFTW | Vnl }RealToHalfHermtianForwardFFTImageFilter and
{FFTW | Vnl}HalfHermitianToRealInverseFFTImageFilter.

Finally, the template arguments have changed to be more consistent with
other image filters. Please see

http://itk.org/migrationv4/index.php?action=artikel&cat=3&id=93&artlang=en

for more details.

Please let me know if you have any other questions.

Regards,
Cory


On Wed, Nov 28, 2012 at 8:48 AM, Tinashe Mutsvangwa <tinashe at gmail.com>wrote:

> Dear  Cory Quammen <https://itk.icts.uiowa.edu/fisheye/user/coryquammen>
>
> I am sorry for personally emailing you but I cannot get an answer from ITK
> mailing list. There is a list of FFT classes that used to be in the ITK
> toolkit that have been removed. I have code which still utilizes these
> classes that I inherited from a previous student. I can no longer compile
> this code and would like to know how to where I can get these classes. You
> seem to be familiar with them. This is the list:
>       itkVnlFFTRealToComplexConjugateImageFilter.h
> itkFFTWComplexConjugateToRealImageFilter.h <https://itk.icts.uiowa.edu/fisheye/browse/ITK-Stage/Modules/Filtering/FFT/include/itkFFTWComplexConjugateToRealImageFilter.h>
> itkFFTWRealToComplexConjugateImageFilter.h <https://itk.icts.uiowa.edu/fisheye/browse/ITK-Stage/Modules/Filtering/FFT/include/itkFFTWRealToComplexConjugateImageFilter.h>
> itkVnlFFTRealToComplexConjugateImageFilter.h <https://itk.icts.uiowa.edu/fisheye/browse/ITK-Stage/Modules/Filtering/FFT/include/itkVnlFFTRealToComplexConjugateImageFilter.h>
> itkVnlFFTComplexConjugateToRealImageFilter.h<https://itk.icts.uiowa.edu/fisheye/browse/ITK-Stage/Modules/Filtering/FFT/include/itkVnlFFTComplexConjugateToRealImageFilter.hxx>
>
> and a couple more. Is there a way to get them as a package so I dont have
> to search for them on the net. I hope this makes some sense to you.
>
> --
> Kind Regards,
>
> Tinashe E.M. Mutsvangwa, PhD
> *Ingénieur de recherche et développement
> Telecom Bretagne*
>
> *Email: tinashe at gmail.com*
> *          tinashe.mutsvangwa at telecom-bretagne.eu <tinashe.mutsvangwa at telecom-bretagne.eu>
> Tel:      +33(0)787665047*
> *Home:  +33(*0)298464928
> *Mobile: +33(0)607833463*
>
>


-- 
Cory Quammen
Research Associate
Department of Computer Science
The University of North Carolina at Chapel Hill
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.itk.org/pipermail/insight-users/attachments/20121128/c02f50a8/attachment.htm>