[Insight-users] [ITK Community] Obtaining Real Result from Inverse Fourier Transform

[Cory Quammen]

Ah, I think I know what is going on. The FFTComplexToComplex filter
actually instantiates a concrete subclass when you create an instance. In
the other FFT classes, there are typically two subclasses, one that uses
Vnl and one that uses FFTW. Right now, FFTComplexToComplex only has an
FFTW-enabled subclass, so it works only if you have FFTW support enabled.
FFTW support is disabled by default for licensing reasons.

Try turning on the options ITK_USE_FFTWF (float support) and ITK_USE_FFTWD
(double support) and recompile ITK and then your program.

Best,
Cory


On Sat, Nov 23, 2013 at 7:54 AM, DVigneault <davis.vigneault at gmail.com>wrote:

> To update, I'm still getting the segmentation fault.
>
> I rebuilt as follows:
>
> $ cmake -DCMAKE_BUILD_TYPE=Debug -DModule_ITKReview:BOOL=On ../src
> $ make
>
> And I made sure that these lines were in my CMakeList.txt file
>
> find_package(ITK)
> include(${ITK_USE_FILE})
>
> However, I still get "Segmentation Fault 11" when running the program, and
> the same output from gdb:
>
> (gdb) n
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000
> 0x0000000100015588 in main (argc=3, argv=0x7fff5fbffab8) at
> /Users/Davis/Desktop/ITKExamples/00_Pipeline/04_harp/src/FFT.cxx:243
> 243         fftInverseFilter->SetInput( maskedShiftFilter->GetOutput() );
> (gdb) p fftInverseFilter
> $1 = {
>   m_Pointer = 0x0
> }
>
>
>
> --
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