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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkDirectFourierReconstructionImageToImageFilter.h
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.
=========================================================================*/
#ifndef __itkDirectFourierReconstructionImageToImageFilter_h
#define __itkDirectFourierReconstructionImageToImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkImage.h"
#include "itkVnlFFTRealToComplexConjugateImageFilter.h"
#include "itkVnlFFTComplexConjugateToRealImageFilter.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkImageSliceConstIteratorWithIndex.h"
#include "itkComplexBSplineInterpolateImageFunction.h"
#include <math.h>
namespace itk
{
/**
* \class DirectFourierReconstructionImageToImageFilter
* \brief Direct fourier reconstruction filter of a tomographic volume.
*
* The algorithm is detailed in the Insight Journal publication on
* "Direct Fourier Tomographic Reconstruction Image-to-Image Filter"
* by D. Zosso, M. Bach Cuadra and J. Thiran, August 2007
*
* This implementation was taken from the Insight Journal paper:
* http://hdl.handle.net/1926/585
*
* \ingroup ImageFilters
*/
template< class TInputPixelType = double, class TOutputPixelType = double >
class ITK_EXPORT DirectFourierReconstructionImageToImageFilter :
public ImageToImageFilter< Image< TInputPixelType, 3 >, Image< TOutputPixelType, 3 > >
{
public:
/** Standard Self typedef */
typedef DirectFourierReconstructionImageToImageFilter Self;
/** InputImageType from TInputPixelType */
typedef Image< TInputPixelType, 3 > InputImageType;
/** OutputImageType from TOutputPixelType */
typedef Image< TOutputPixelType, 3 > OutputImageType;
/** Standard Superclass typedef */
typedef ImageToImageFilter< InputImageType, OutputImageType > Superclass;
/** Standard Pointer typedef */
typedef SmartPointer< Self > Pointer;
/** Standard ConstPointer typedef */
typedef SmartPointer< const Self > ConstPointer;
itkNewMacro( Self );
itkTypeMacro( DirectFourierReconstructionImageToImageFilter, ImageToImageFilter );
/** Class RegionType */
typedef typename InputImageType::RegionType RegionType;
/** Class IndexType */
typedef typename InputImageType::IndexType IndexType;
/** Class SizeType */
typedef typename InputImageType::SizeType SizeType;
/** Class PointType */
typedef typename InputImageType::PointType PointType;
/** Class SpacingType */
typedef typename InputImageType::SpacingType SpacingType;
/** Standard (const) InputImagePointer */
typedef typename InputImageType::ConstPointer ConstInputImagePointer;
/** Special (non-const) InputImagePointer */
typedef typename InputImageType::Pointer InputImagePointer;
/** OutputImagePointer */
typedef typename OutputImageType::Pointer OutputImagePointer;
itkSetMacro( ZeroPadding, unsigned short int );
itkGetConstMacro( ZeroPadding, unsigned short int );
itkSetMacro( OverSampling, unsigned short int );
itkGetConstMacro( OverSampling, unsigned short int );
itkSetMacro( Cutoff, double );
itkGetConstMacro( Cutoff, double );
itkSetMacro( AlphaRange, double );
itkGetConstMacro( AlphaRange, double );
itkSetMacro( AlphaDirection, unsigned short int );
itkGetConstMacro( AlphaDirection, unsigned short int );
itkSetMacro( ZDirection, unsigned short int );
itkGetConstMacro( ZDirection, unsigned short int );
itkSetMacro( RDirection, unsigned short int );
itkGetConstMacro( RDirection, unsigned short int );
itkSetMacro( RadialSplineOrder, unsigned short int );
itkGetConstMacro( RadialSplineOrder, unsigned short int );
protected:
/** Constructor */
DirectFourierReconstructionImageToImageFilter();
/** Destructor */
~DirectFourierReconstructionImageToImageFilter() {};
/** Output class information */
void PrintSelf( std::ostream &os, Indent indent ) const;
/** Generate metadata for output image */
void GenerateOutputInformation();
/** Calculate the required input region */
void GenerateInputRequestedRegion();
/** Actual filter computation */
void GenerateData();
private:
/** Const slice iterator type of the input image */
typedef ImageSliceConstIteratorWithIndex< InputImageType > InputSliceIteratorType;
/** 1D FFT filter type */
typedef VnlFFTRealToComplexConjugateImageFilter< double, 1 > FFTLineFilterType;
/** Derived 1D FFT image type */
typedef FFTLineFilterType::OutputImageType FFTLineType;
/** Derived 1D input image type */
typedef FFTLineFilterType::InputImageType ProjectionLineType;
/** 1D FFT line iterator */
typedef ImageRegionIteratorWithIndex< FFTLineType > FFTLineIteratorType;
/** 1D FFT line B-Spline interpolator */
typedef ComplexBSplineInterpolateImageFunction< FFTLineType, double, double > FFTLineInterpolatorType;
/** 2D inverse FFT filter type */
typedef VnlFFTComplexConjugateToRealImageFilter< double, 2 > IFFTSliceFilterType;
/** Derived 2D FFT image type */
typedef IFFTSliceFilterType::InputImageType FFTSliceType;
/** Derived 2D output slice type */
typedef IFFTSliceFilterType::OutputImageType OutputSliceType;
/** 2D FFT slice iterator */
typedef ImageRegionIteratorWithIndex< FFTSliceType > FFTSliceIteratorType;
/** 2D output slice iterator */
typedef ImageRegionIteratorWithIndex< OutputSliceType > OutputSliceIteratorType;
unsigned short int m_ZeroPadding; /**< n-fold zero-padding */
unsigned short int m_OverSampling; /**< n-fold oversampling */
double m_Cutoff; /**< Radial lowpass cut-off frequency */
double m_AlphaRange; /**< Covered angular range */
unsigned short int m_ZDirection; /**< Axial index in the input image */
unsigned short int m_AlphaDirection; /**< Angular index in the input image */
unsigned short int m_RDirection; /**< Radial index in the input image */
unsigned short int m_RadialSplineOrder; /**< Spline order for the radial BSpline interpolation */
double m_PI; /**< The constant pi.... */
RegionType m_InputRequestedRegion; /**< The region requested from* the input image */
DirectFourierReconstructionImageToImageFilter(const Self&); /**< purposely not implemented */
void operator=(const Self&); /**< purposely not implemented */
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkDirectFourierReconstructionImageToImageFilter.txx"
#endif
#endif /* __itkDirectFourierReconstructionImageToImageFilter_h */
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