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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 "itkComplexToRealImageFilter.h"
#include "itkComposeImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkComplexToComplex1DFFTImageFilter.h"
#include "itkVnlComplexToComplex1DFFTImageFilter.h"
#if defined(ITK_USE_FFTWD) || defined(ITK_USE_FFTWF)
# include "itkFFTWComplexToComplex1DFFTImageFilter.h"
#endif
#include "itkTestingMacros.h"
template <typename FFTType>
int
doTest(const char * inputRealFullImage, const char * inputImaginaryFullImage, const char * outputImage)
{
using ComplexImageType = typename FFTType::InputImageType;
using ImageType = itk::Image<typename itk::NumericTraits<typename ComplexImageType::PixelType>::ValueType,
ComplexImageType::ImageDimension>;
using ReaderType = itk::ImageFileReader<ImageType>;
using JoinFilterType = itk::ComposeImageFilter<ImageType, ComplexImageType>;
using ToRealFilterType = itk::ComplexToRealImageFilter<ComplexImageType, ImageType>;
using WriterType = itk::ImageFileWriter<ImageType>;
auto readerReal = ReaderType::New();
auto readerImag = ReaderType::New();
auto fft = FFTType::New();
auto joinFilter = JoinFilterType::New();
auto toReal = ToRealFilterType::New();
auto writer = WriterType::New();
readerReal->SetFileName(inputRealFullImage);
readerImag->SetFileName(inputImaginaryFullImage);
joinFilter->SetInput1(readerReal->GetOutput());
joinFilter->SetInput2(readerImag->GetOutput());
auto transformDirection = FFTType::INVERSE;
fft->SetTransformDirection(transformDirection);
ITK_TEST_SET_GET_VALUE(transformDirection, fft->GetTransformDirection());
fft->SetInput(joinFilter->GetOutput());
toReal->SetInput(fft->GetOutput());
writer->SetInput(toReal->GetOutput());
writer->SetFileName(outputImage);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
return EXIT_SUCCESS;
}
int
itkComplexToComplex1DFFTImageFilterTest(int argc, char * argv[])
{
if (argc < 3)
{
std::cerr << "Missing Parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv);
std::cerr << " inputImageRealFull inputImageImaginaryFull 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 ComplexImageType = itk::Image<std::complex<PixelType>, Dimension>;
int backend = 0;
if (argc > 4)
{
backend = std::stoi(argv[4]);
}
if (backend == 0)
{
using FFTInverseType = itk::ComplexToComplex1DFFTImageFilter<ComplexImageType, ComplexImageType>;
auto inverse = FFTInverseType::New();
if (inverse == nullptr)
{
std::cerr << "Failed to register a backend for ComplexToComplex1DFFTImageFilter" << std::endl;
return EXIT_FAILURE;
}
ITK_EXERCISE_BASIC_OBJECT_METHODS(inverse, ComplexToComplex1DFFTImageFilter, ImageToImageFilter);
return doTest<FFTInverseType>(argv[1], argv[2], argv[3]);
}
else if (backend == 1)
{
using FFTInverseType = itk::VnlComplexToComplex1DFFTImageFilter<ComplexImageType, ComplexImageType>;
return doTest<FFTInverseType>(argv[1], argv[2], argv[3]);
}
else if (backend == 2)
{
#if defined(ITK_USE_FFTWD) || defined(ITK_USE_FFTWF)
using FFTInverseType = itk::FFTWComplexToComplex1DFFTImageFilter<ComplexImageType, ComplexImageType>;
return doTest<FFTInverseType>(argv[1], argv[2], argv[3]);
#endif
}
std::cerr << "Backend " << backend << " (" << argv[4] << ") not implemented" << std::endl;
return EXIT_FAILURE;
}
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