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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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.
*
*=========================================================================*/
/** Example illustrating use of FFTComplexToComplexImageFilter
*
* \author Simon K. Warfield simon.warfield\@childrens.harvard.edu
*
* \note Attribution Notice. This research work was made possible by Grant
* Number R01 RR021885 (PI Simon K. Warfield, Ph.D.) from
* the National Center for Research Resources (NCRR), a component of the
* National Institutes of Health (NIH). Its contents are solely the
* responsibility of the authors and do not necessarily represent the
* official view of NCRR or NIH.
*
* Contributed to the Insight Journal paper:
* http://insight-journal.org/midas/handle.php?handle=1926/326
*
*/
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkFFTWComplexToComplexFFTImageFilter.h"
#include "itkForwardFFTImageFilter.h"
#include "itkInverseFFTImageFilter.h"
template< typename TPixel, unsigned int VDimension >
int transformImage( const char * inputImageFileName, const char * outputImageFileName )
{
typedef TPixel RealPixelType;
typedef std::complex< RealPixelType > ComplexPixelType;
const unsigned int Dimension = VDimension;
typedef itk::Image< RealPixelType, Dimension > RealImageType;
typedef itk::Image< ComplexPixelType, Dimension > ComplexImageType;
typedef itk::ImageFileReader< RealImageType > ReaderType;
typename ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( inputImageFileName );
typedef itk::ForwardFFTImageFilter< RealImageType, ComplexImageType > ForwardFilterType;
typename ForwardFilterType::Pointer forwardFilter = ForwardFilterType::New();
forwardFilter->SetInput( reader->GetOutput() );
typedef itk::FFTWComplexToComplexFFTImageFilter< ComplexImageType > ComplexFilterType;
typename ComplexFilterType::Pointer inverseComplexFilter = ComplexFilterType::New();
inverseComplexFilter->SetInput( forwardFilter->GetOutput() );
inverseComplexFilter->SetTransformDirection( ComplexFilterType::INVERSE );
typename ComplexFilterType::Pointer forwardComplexFilter = ComplexFilterType::New();
forwardComplexFilter->SetInput( inverseComplexFilter->GetOutput() );
forwardComplexFilter->SetTransformDirection( ComplexFilterType::FORWARD );
// This tests the CanUseDestructiveAlgorithm state with the FFTW version.
forwardComplexFilter->ReleaseDataFlagOn();
typedef itk::InverseFFTImageFilter< ComplexImageType, RealImageType > InverseFilterType;
typename InverseFilterType::Pointer inverseFilter = InverseFilterType::New();
inverseFilter->SetInput( forwardComplexFilter->GetOutput() );
typedef itk::ImageFileWriter< RealImageType > WriterType;
typename WriterType::Pointer writer = WriterType::New();
writer->SetFileName( outputImageFileName );
writer->SetInput( inverseFilter->GetOutput() );
try
{
writer->Update();
}
catch( itk::ExceptionObject & error )
{
std::cerr << error << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
int itkFFTWComplexToComplexFFTImageFilterTest( int argc, char * argv[] )
{
if( argc < 4 )
{
std::cerr << "Usage: " << argv[0] << " <InputImage> <OutputImage> <float|double>" << std::endl;
return EXIT_FAILURE;
}
const char * inputImageFileName = argv[1];
const char * outputImageFileName = argv[2];
const std::string pixelTypeString( argv[3] );
itk::ImageIOBase::Pointer imageIO = itk::ImageIOFactory::CreateImageIO( inputImageFileName, itk::ImageIOFactory::ReadMode );
imageIO->SetFileName( inputImageFileName );
imageIO->ReadImageInformation();
const unsigned int dimension = imageIO->GetNumberOfDimensions();
if( pixelTypeString.compare( "float" ) == 0 )
{
switch( dimension )
{
#ifdef ITK_USE_FFTWF
case 2:
return transformImage< float, 2 >( inputImageFileName, outputImageFileName );
break;
case 3:
return transformImage< float, 3 >( inputImageFileName, outputImageFileName );
break;
#endif
default:
std::cerr << "Unknown image dimension." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
else if( pixelTypeString.compare( "double" ) == 0 )
{
switch( dimension )
{
#ifdef ITK_USE_FFTWD
case 2:
return transformImage< double, 2 >( inputImageFileName, outputImageFileName );
break;
case 3:
return transformImage< double, 3 >( inputImageFileName, outputImageFileName );
break;
#endif
default:
std::cerr << "Unknown image dimension." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
else
{
std::cerr << "Unknown pixel type string." << std::endl;
return EXIT_FAILURE;
}
return EXIT_FAILURE;
}
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