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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <complex>
#include <string>
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkForward1DFFTImageFilter.h"
#include "itkInverse1DFFTImageFilter.h"
#include "itkVnlForward1DFFTImageFilter.h"
#include "itkVnlInverse1DFFTImageFilter.h"
#if defined(ITK_USE_FFTWD) || defined(ITK_USE_FFTWF)
# include "itkFFTWForward1DFFTImageFilter.h"
# include "itkFFTWInverse1DFFTImageFilter.h"
#endif
#include "itkTestingMacros.h"
template <typename FFTForwardType, typename FFTInverseType>
int
doTest(const char * inputImage, const char * outputImage)
{
const unsigned int direction = 1;
using ImageType = typename FFTForwardType::InputImageType;
using ReaderType = itk::ImageFileReader<ImageType>;
auto reader = ReaderType::New();
reader->SetFileName(inputImage);
auto fftForward = FFTForwardType::New();
fftForward->SetInput(reader->GetOutput());
fftForward->SetDirection(direction);
auto fftInverse = FFTInverseType::New();
fftInverse->SetInput(fftForward->GetOutput());
fftInverse->SetDirection(direction);
using WriterType = itk::ImageFileWriter<ImageType>;
auto writer = WriterType::New();
writer->SetInput(fftInverse->GetOutput());
writer->SetFileName(outputImage);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
fftForward.Print(std::cout);
fftInverse.Print(std::cout);
return EXIT_SUCCESS;
}
int
itkFFT1DImageFilterTest(int argc, char * argv[])
{
if (argc < 3)
{
std::cerr << "Missing Parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv);
std::cerr << " inputImage outputImage [backend]" << std::endl;
std::cerr << "backend implementation options:" << std::endl;
std::cerr << " 0 default" << std::endl;
std::cerr << " 1 VNL" << std::endl;
std::cerr << " 2 FFTW" << std::endl;
std::cerr << std::flush;
return EXIT_FAILURE;
}
using PixelType = double;
const unsigned int Dimension = 2;
using ImageType = itk::Image<PixelType, Dimension>;
using ComplexImageType = itk::Image<std::complex<PixelType>, Dimension>;
using FFTForwardType = itk::Forward1DFFTImageFilter<ImageType, ComplexImageType>;
using FFTInverseType = itk::Inverse1DFFTImageFilter<ComplexImageType, ImageType>;
int backend = 0;
if (argc > 3)
{
backend = std::stoi(argv[3]);
}
if (backend == 0) // Default backend
{
using VnlForwardFFTSubtype = itk::VnlForward1DFFTImageFilter<ImageType, ComplexImageType>;
using VnlInverseFFTSubtype = itk::VnlInverse1DFFTImageFilter<ComplexImageType, ImageType>;
// Verify that FFT class is instantiated with expected backend through the object factory
auto forward = FFTForwardType::New();
if (dynamic_cast<VnlForwardFFTSubtype *>(forward.GetPointer()) == nullptr)
{
std::cerr << "Did not get Vnl default backend for forward FFT as expected!" << std::endl;
return EXIT_FAILURE;
}
auto inverse = FFTInverseType::New();
if (dynamic_cast<VnlInverseFFTSubtype *>(inverse.GetPointer()) == nullptr)
{
std::cerr << "Did not get Vnl default backend for inverse FFT as expected!" << std::endl;
return EXIT_FAILURE;
}
return doTest<FFTForwardType, FFTInverseType>(argv[1], argv[2]);
}
else if (backend == 1) // Vnl backend
{
// Verify object factory returns expected type
using VnlForwardType = itk::VnlForward1DFFTImageFilter<ImageType, ComplexImageType>;
using VnlInverseType = itk::VnlInverse1DFFTImageFilter<ComplexImageType, ImageType>;
return doTest<VnlForwardType, VnlInverseType>(argv[1], argv[2]);
}
else if (backend == 2) // FFTW backend
{
#if defined(ITK_USE_FFTWD) || defined(ITK_USE_FFTWF)
using FFTWForwardType = itk::FFTWForward1DFFTImageFilter<ImageType, ComplexImageType>;
using FFTWInverseType = itk::FFTWInverse1DFFTImageFilter<ComplexImageType, ImageType>;
itk::ObjectFactoryBase::RegisterInternalFactoryOnce<itk::FFTImageFilterFactory<itk::FFTWForward1DFFTImageFilter>>();
itk::ObjectFactoryBase::RegisterInternalFactoryOnce<itk::FFTImageFilterFactory<itk::FFTWInverse1DFFTImageFilter>>();
return doTest<FFTWForwardType, FFTWInverseType>(argv[1], argv[2]);
#else
std::cerr << "FFTW is not defined and this test should not be run!" << std::endl;
return EXIT_FAILURE;
#endif
}
else
{
std::cerr << "Backend " << backend << " (" << argv[3] << ") not implemented" << std::endl;
return EXIT_FAILURE;
}
}
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