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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkIterativeInverseDeformationFieldImageFilter.h,v $
Language: C++
Date: $Date: 2006-03-29 14:53:40 $
Version: $Revision: 1.6 $
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 __itkIterativeInverseDeformationFieldImageFilter_h
#define __itkIterativeInverseDeformationFieldImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkWarpVectorImageFilter.h"
#include "itkVectorLinearInterpolateImageFunction.h"
#include "itkImageRegionIterator.h"
#include "itkTimeProbe.h"
namespace itk
{
/** \class IterativeInverseDeformationFieldImageFilter
* \brief Computes the inverse of a deformation field.
*
* IterativeInverseDeformationFieldImageFilter takes a deformation field as input and
* computes the deformation field that is its inverse. If the input deformation
* field was mapping coordinates from a space A into a space B, the output of
* this filter will map coordinates from the space B into the space A.
*
* The algorithm implemented in this filter uses an iterative method for
* progresively refining the values of the inverse field. Starting from the
* direct field, at every pixel the direct mapping of this point is found, and
* a the nevative of the current deformation is stored in the inverse field at
* the nearest pixel. Then, subsequent iterations verify if any of the neigbor pixels
* provide a better return to the current pixel, in which case its value is taken for
* updating the vector in the inverse field.
*
* This method was discussed in the users-list during February 2004.
*
* \author Corinne Mattmann
*
*/
template < class TInputImage, class TOutputImage >
class ITK_EXPORT IterativeInverseDeformationFieldImageFilter :
public ImageToImageFilter<TInputImage,TOutputImage>
{
public:
/** Standard class typedefs. */
typedef IterativeInverseDeformationFieldImageFilter Self;
typedef ImageToImageFilter<TInputImage,TOutputImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(IterativeInverseDeformationFieldImageFilter, ImageToImageFilter);
/** Some typedefs. */
typedef TInputImage InputImageType;
typedef typename InputImageType::ConstPointer InputImageConstPointer;
typedef typename InputImageType::Pointer InputImagePointer;
typedef typename InputImageType::PointType InputImagePointType;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef typename InputImageType::SpacingType InputImageSpacingType;
typedef TOutputImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename OutputImageType::PixelType OutputImagePixelType;
typedef typename OutputImageType::PointType OutputImagePointType;
typedef typename OutputImageType::IndexType OutputImageIndexType;
typedef typename OutputImagePixelType::ValueType OutputImageValueType;
typedef TimeProbe TimeType;
typedef ImageRegionConstIterator<InputImageType> InputConstIterator;
typedef ImageRegionIterator<InputImageType> InputIterator;
typedef ImageRegionIterator<OutputImageType> OutputIterator;
typedef WarpVectorImageFilter<TOutputImage,TInputImage,TOutputImage> VectorWarperType;
typedef VectorLinearInterpolateImageFunction<TInputImage,double> FieldInterpolatorType;
typedef typename FieldInterpolatorType::Pointer FieldInterpolatorPointer;
typedef typename FieldInterpolatorType::OutputType FieldInterpolatorOutputType;
itkSetMacro(NumberOfIterations, unsigned int);
itkGetMacro(NumberOfIterations, unsigned int);
// If the error (in mm) between forward and backward mapping is smaller than the StopValue,
// the algorithm stops.
// This value can be used to speed up the calculation.
itkSetMacro(StopValue, double);
itkGetMacro(StopValue, double);
char* GetReport() {return this->m_Report;}
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(OutputHasNumericTraitsCheck,
(Concept::HasNumericTraits<OutputImageValueType>));
/** End concept checking */
#endif
protected:
IterativeInverseDeformationFieldImageFilter();
~IterativeInverseDeformationFieldImageFilter() {}
void PrintSelf(std::ostream& os, Indent indent) const;
void MakeReport();
void GenerateData( );
unsigned int m_NumberOfIterations;
double m_StopValue;
double m_Time;
private:
IterativeInverseDeformationFieldImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#include "itkIterativeInverseDeformationFieldImageFilter.txx"
#endif
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