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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkFFTComplexToComplexImageFilterTest01.cxx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#ifdef __BORLANDC__
#define ITK_LEAN_AND_MEAN
#endif
/** 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 "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkFFTComplexToComplexImageFilter.h"
// #include "itkFFTWComplexToComplexImageFilter.h"
#if !defined(USE_FFTWF)
//#error "This example only works when single precision FFTW is used"
//Changing WorkPixeltype to double and changing this conditional to USE_FFTWD
//will also work.
#endif
int itkFFTComplexToComplexImageFilterTest01( int argc, char * argv[] )
{
if( argc < 3 )
{
std::cerr << "Usage: " << argv[0] << " input output [dir]" << std::endl;
std::cerr << " " "dir: -1 for forward" << std::endl;
std::cerr << " " "dir: 1 for backward" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
typedef float PixelComponentType;
typedef std::complex< PixelComponentType > PixelType;
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageFileWriter< ImageType > WriterType;
ReaderType::Pointer reader = ReaderType::New();
WriterType::Pointer writer = WriterType::New();
reader->SetFileName( argv[1] );
writer->SetFileName( argv[2] );
// FFT filter
typedef itk::FFTComplexToComplexImageFilter < PixelComponentType, Dimension> FFTFilterType;
int Direction = 1;
if( argc == 4 )
{
Direction = atoi(argv[3]);
if( Direction != -1 && Direction != 1 )
{
std::cerr << "Usage: " << argv[0] << " input output [dir]" << std::endl;
std::cerr << " " "dir: -1 for forward transform" << std::endl;
std::cerr << " " "dir: 1 for backward transform" << std::endl;
return EXIT_FAILURE;
}
}
FFTFilterType::Pointer fftFilter = FFTFilterType::New();
if( Direction == 1 )
{
fftFilter->SetTransformDirection( FFTFilterType::DIRECT );
}
else
{
fftFilter->SetTransformDirection( FFTFilterType::INVERSE );
}
fftFilter->SetInput( reader->GetOutput() );
writer->SetInput( fftFilter->GetOutput() );
try
{
writer->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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