itkMatchCardinalityImageToImageMetric.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkMatchCardinalityImageToImageMetric.h,v $
  Language:  C++
  Date:      $Date: 2004/03/12 15:46:47 $
  Version:   $Revision: 1.4 $

  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 __itkMatchCardinalityImageToImageMetric_h
#define __itkMatchCardinalityImageToImageMetric_h

#include "itkImageToImageMetric.h"
#include "itkCovariantVector.h"
#include "itkPoint.h"
#include "itkMultiThreader.h"
#include <vector>

namespace itk
{
template < class TFixedImage, class TMovingImage > 
class ITK_EXPORT MatchCardinalityImageToImageMetric : 
    public ImageToImageMetric< TFixedImage, TMovingImage>
{
public:

  typedef MatchCardinalityImageToImageMetric    Self;
  typedef ImageToImageMetric<TFixedImage, TMovingImage >  Superclass;

  typedef SmartPointer<Self>         Pointer;
  typedef SmartPointer<const Self>   ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(MatchCardinalityImageToImageMetric, ImageToImageMetric);

 
  typedef typename Superclass::RealType                 RealType;
  typedef typename Superclass::TransformType            TransformType;
  typedef typename Superclass::TransformPointer         TransformPointer;
  typedef typename Superclass::TransformParametersType  TransformParametersType;
  typedef typename Superclass::TransformJacobianType    TransformJacobianType;
  typedef typename Superclass::GradientPixelType        GradientPixelType;

  typedef typename Superclass::MeasureType              MeasureType;
  typedef typename Superclass::DerivativeType           DerivativeType;
  typedef typename Superclass::FixedImageType           FixedImageType;
  typedef typename Superclass::MovingImageType          MovingImageType;
  typedef typename Superclass::FixedImageConstPointer   FixedImageConstPointer;
  typedef typename Superclass::MovingImageConstPointer  MovingImageConstPointer;
  typedef typename Superclass::FixedImageRegionType     FixedImageRegionType;


  void GetDerivative( const TransformParametersType &,
                      DerivativeType & derivative ) const
    {
      itkWarningMacro(<< "This metric does not provide metric derivatives.");
      derivative.Fill( NumericTraits<ITK_TYPENAME DerivativeType::ValueType>::Zero );
    }

  MeasureType GetValue( const TransformParametersType & parameters ) const;

  itkSetMacro(MeasureMatches, bool);
  itkBooleanMacro(MeasureMatches);
  itkGetMacro(MeasureMatches, bool);

  itkSetClampMacro( NumberOfThreads, int, 1, ITK_MAX_THREADS );
  itkGetConstReferenceMacro( NumberOfThreads, int );

  MultiThreader * GetMultiThreader()
    {return m_Threader;}

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

  MeasureType GetNonconstValue( const TransformParametersType & parameters );

  virtual
  void ThreadedGetValue(const FixedImageRegionType& outputRegionForThread,
                        int threadId );

  virtual
  int SplitFixedRegion(int i,int num, FixedImageRegionType& splitRegion);

  static ITK_THREAD_RETURN_TYPE ThreaderCallback( void *arg );

  struct ThreadStruct
  {
    Pointer Metric;
  };

private:
  MatchCardinalityImageToImageMetric(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  bool m_MeasureMatches;
  std::vector<MeasureType> m_ThreadMatches;
  std::vector<unsigned long> m_ThreadCounts;
  
  MultiThreader::Pointer m_Threader;
  int m_NumberOfThreads;
};

} // end namespace itk

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

#endif

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