freDifferenceEnergyImageToImageMetric.h

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

  Program:   F.R.E.E. - flexible registration evaluation engine
  Version:   v.1.0.0
  Date:      $Date: 2006/09/01 12:00:00 $
  Module:    $RCSfile: freDifferenceEnergyImageToImageMetric.h,v $
  Language:  C++



  Copyright (c) 2007 Ralf o Floca (Department of Medical Informatics,
  Institute for Medical Biometry and Informatics, University of Heidelberg,
  Germany). All rights reserved.
  See FREECopyright.txt or http://www.mi.med.uni-hd.de/free/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 __freDifferenceEnergyImageToImageMetric_h
#define __freDifferenceEnergyImageToImageMetric_h

#include "itkHistogram.h"
#include "freDifferenceHistogramImageToImageMetric.h"

namespace itk
{
template <class TFixedImage, class TMovingImage, class TDifImage>
class ITK_EXPORT DifferenceEnergyImageToImageMetric :
public DifferenceHistogramImageToImageMetric<TFixedImage, TMovingImage, TDifImage>
{
 public:
  typedef DifferenceEnergyImageToImageMetric Self;
  typedef DifferenceHistogramImageToImageMetric<TFixedImage, TMovingImage, TDifImage> Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(DifferenceEnergyImageToImageMetric,
    DifferenceHistogramImageToImageMetric);

  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 TDifImage                                                                                                                     DifferenceImageType;
  typedef typename DifferenceImageType::PixelType                                       DifferenceImagePixelType;

  typedef typename Superclass::HistogramType            HistogramType;
  typedef typename HistogramType::FrequencyType         HistogramFrequencyType;
  typedef typename HistogramType::Iterator              HistogramIteratorType;
  typedef typename HistogramType::MeasurementVectorType HistogramMeasurementVectorType;

protected:
  DifferenceEnergyImageToImageMetric(){}
  virtual ~DifferenceEnergyImageToImageMetric(){}
  
  virtual MeasureType EvaluateMeasure(HistogramType& histogram) const;

private:
  DifferenceEnergyImageToImageMetric(Self const&); // Purposely not implemented.
  void operator=(Self const&); // Purposely not implemented.
};

} // end namespace itk

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

#endif // __freDifferenceEnergyImageToImageMetric_h

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