itkPDEDeformableRegistrationFilter.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkPDEDeformableRegistrationFilter.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:28:37 $
  Version:   $Revision: 1.15 $

  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 _itkPDEDeformableRegistrationFilter_h_
#define _itkPDEDeformableRegistrationFilter_h_

#include "itkDenseFiniteDifferenceImageFilter.h"
#include "itkPDEDeformableRegistrationFunction.h"

namespace itk {

template<class TFixedImage, class TMovingImage, class TDeformationField>
class ITK_EXPORT PDEDeformableRegistrationFilter : 
    public DenseFiniteDifferenceImageFilter<TDeformationField,TDeformationField>
{
public:
  typedef PDEDeformableRegistrationFilter    Self;
  typedef DenseFiniteDifferenceImageFilter<
    TDeformationField,TDeformationField>    Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro( PDEDeformableRegistrationFilter, 
                DenseFiniteDifferenceImageFilter );

  typedef TFixedImage   FixedImageType;
  typedef typename FixedImageType::Pointer  FixedImagePointer;
  typedef typename FixedImageType::ConstPointer  FixedImageConstPointer;

  typedef TMovingImage    MovingImageType;
  typedef typename MovingImageType::Pointer  MovingImagePointer;
  typedef typename MovingImageType::ConstPointer  MovingImageConstPointer;
  
  typedef TDeformationField    DeformationFieldType;
  typedef typename DeformationFieldType::Pointer  DeformationFieldPointer;

  typedef typename Superclass::OutputImageType    OutputImageType;

  typedef typename Superclass::FiniteDifferenceFunctionType
  FiniteDifferenceFunctionType;

  typedef PDEDeformableRegistrationFunction<FixedImageType,MovingImageType,
                                            DeformationFieldType>  PDEDeformableRegistrationFunctionType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      Superclass::ImageDimension);

  void SetFixedImage( const FixedImageType * ptr );

  const FixedImageType * GetFixedImage(void);

  void SetMovingImage( const MovingImageType * ptr );

  const MovingImageType * GetMovingImage(void);

  void SetInitialDeformationField( DeformationFieldType * ptr )
  { this->SetInput( ptr ); }

  DeformationFieldType * GetDeformationField()
  { return this->GetOutput(); }

  itkSetMacro(NumberOfIterations, unsigned int);

  itkGetMacro(NumberOfIterations, unsigned int);

  itkSetVectorMacro( StandardDeviations, double, ImageDimension );
  virtual void SetStandardDeviations( double value );

  const double * GetStandardDeviations(void) 
  { return (double *) m_StandardDeviations; }

protected:
  PDEDeformableRegistrationFilter();
  ~PDEDeformableRegistrationFilter() {}
  void PrintSelf(std::ostream& os, Indent indent) const;

  virtual bool Halt()
  {
    if (this->GetElapsedIterations() == m_NumberOfIterations) return true;
    else return false;
  }

  virtual void CopyInputToOutput();

  virtual void InitializeIteration();

  virtual void SmoothDeformationField();

  virtual void CopyDeformationField( DeformationFieldType * input,
                                     DeformationFieldType * output );

  virtual void GenerateOutputInformation();

  virtual void GenerateInputRequestedRegion();

private:
  PDEDeformableRegistrationFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  unsigned int             m_NumberOfIterations;
  
  double                   m_StandardDeviations[ImageDimension];

  DeformationFieldPointer   m_TempField;

  double                    m_MaximumError;

};


} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkPDEDeformableRegistrationFilter.txx"
#endif

#endif

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