[ITK-users] Using FFTW o

[Matt McCormick]

Hi Ricky,

1) \path\to\libfftw3f-f.lib
2) leave unset, because I don't think it is available
3) \path\to\

It is also possible to use the VNL version with a
ConstantPadImageFilter applied to the input.  See the implementation
of itk::FFTConvolutionImageFilter for an example.

HTH,
Matt

On Tue, May 6, 2014 at 5:08 PM, Ricky Singla <rsingla92 at gmail.com> wrote:
> Replying to my own post -
>
> I realized that the options "ITK_USE_FFTWF"/"ITK_USE_FFTWD" and
> "ITK_USE_SYSTEM_FFTW" were not mutually exclusive and that if "USE_SYSTEM"
> is set, then one of the others must be.
>
> This however does bring up three configuration options of which I'm not sure
> how to fill out.
>
> These are:
> 1) FFTWF_LIB - a path to a library
> 2) FFTWF_THREADS_LIB - a path to a library
> 3) FFTW_INCLUDE_PATH - a path to a file.
>
> I understand that the first two options differ in that one is for
> single-threaded library and the other is for a multi-threaded library (my
> assumption anyways). The last seems like it should point to a header file.
>
> I think (and am currently generating and building ITK to confirm) that these
> should be something along the lines of:
> 1) \path\to\libfftw3f-f.lib
> 2) \path\to\\path\to\libfftw3f-f.lib
> 3) \path\to\fftw3.h
>
> Does this seem right? Should the *.lib be *.dll?
>
> Ricky Singla
> 4th Year BASc | Computer Engineering
> Research Assistant | UBC Robotics and Control Lab
> UBC Orbit | Software Team
> rsingla92 [at] gmail [dot] com | 778.926.9475
>
>
> On Tue, May 6, 2014 at 1:22 PM, Ricky Singla <rsingla92 at gmail.com> wrote:
>>
>> Hi there,
>>
>> I'm attempting to perform a Fast Fourier Transform (FFT)  on an image
>> using ITK. For my test data, I am unable to use the ForwardFFTImageFilter,
>> which throws an exception on Update(). This exception is in regards to the
>> dimension sizes of the image (must be a multiple of 2,3, or 5). Thus I am
>> looking to use FFTW.
>>
>> On my Windows 7 machine, in my ITK cmake configuration, I have set
>> ITK_USE_SYSTEM_FFTW to be true. This was because there were error messages
>> on setting ITK_USE_FFTWD indicating that for Windows, I must use
>> ITK_USE_SYSTEM_FFTW as fftw cannot be built as an external project on
>> Windows.
>>
>> In my VS 2008 project, upon building the solution, I hit an error "FFTW
>> 3.3.2 or later is required so that FFTW_WISDOM_ONLY is defined." This
>> indicates to me that FFTW was not found.
>>
>> Searching the ITK mailing list archive, I did not find a clear solution to
>> this.
>>
>> Does anyone know or have a solution for using FFTW in ITK on a Windows
>> machine?
>>
>> Thank you.
>>
>> Cheers,
>> Ricky Singla
>
>
>
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