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set(DOCUMENTATION
"This module provides interfaces to FFT
implementations. In particular it provides the direct and inverse
computations of Fast Fourier Transforms based on
<a href=\"http://vxl.sourceforge.net/\">VXL</a> and
<a href=\"https://www.fftw.org\">FFTW</a>. Note that when using the FFTW
implementation you must comply with the GPL license.")
set(_fft_backends "FFTImageFilterInit::Vnl")
if(ITK_USE_FFTWF OR ITK_USE_FFTWD)
# Prepend so that FFTW constructor is preferred
list(PREPEND _fft_backends "FFTImageFilterInit::FFTW")
endif()
itk_module(
ITKFFT
ENABLE_SHARED
DEPENDS
ITKCommon
COMPILE_DEPENDS
ITKImageGrid
TEST_DEPENDS
ITKTestKernel
ITKImageCompare
ITKImageIntensity
FACTORY_NAMES
${_fft_backends}
DESCRIPTION
"${DOCUMENTATION}")
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