itkExpectationBasedPointSetToPointSetMetricv4.h

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 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
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 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
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#ifndef __itkExpectationBasedPointSetToPointSetMetricv4_h
#define __itkExpectationBasedPointSetToPointSetMetricv4_h

#include "itkPointSetToPointSetMetricv4.h"
#include "itkPointSet.h"
#include "itkImage.h"

namespace itk
{
template<class TFixedPointSet, class TMovingPointSet = TFixedPointSet>
class ITK_EXPORT ExpectationBasedPointSetToPointSetMetricv4:
  public PointSetToPointSetMetricv4<TFixedPointSet, TMovingPointSet>
{
public:

  typedef ExpectationBasedPointSetToPointSetMetricv4                   Self;
  typedef PointSetToPointSetMetricv4<TFixedPointSet, TMovingPointSet>  Superclass;
  typedef SmartPointer<Self>                                           Pointer;
  typedef SmartPointer<const Self>                                     ConstPointer;

  itkNewMacro( Self );

  itkTypeMacro( ExpectationBasedPointSetToPointSetMetricv4, PointSetToPointSetMetricv4 );

  typedef typename Superclass::MeasureType              MeasureType;
  typedef typename Superclass::DerivativeType           DerivativeType;
  typedef typename Superclass::LocalDerivativeType      LocalDerivativeType;
  typedef typename Superclass::PointType                PointType;
  typedef typename Superclass::CoordRepType             CoordRepType;
  typedef typename Superclass::PointIdentifier          PointIdentifier;
  typedef typename Superclass::NeighborsIdentifierType  NeighborsIdentifierType;

  virtual MeasureType GetLocalNeighborhoodValue( const PointType & ) const;

  virtual void GetLocalNeighborhoodValueAndDerivative( const PointType &,
    MeasureType &, LocalDerivativeType & ) const;

  itkSetMacro( PointSetSigma, CoordRepType );

  itkGetConstMacro( PointSetSigma, CoordRepType );

  itkSetMacro( EvaluationKNeighborhood, unsigned int );

  itkGetConstMacro( EvaluationKNeighborhood, unsigned int );

  void Initialize( void ) throw ( ExceptionObject );

protected:
  ExpectationBasedPointSetToPointSetMetricv4();
  virtual ~ExpectationBasedPointSetToPointSetMetricv4();

  void PrintSelf( std::ostream & os, Indent indent ) const;

private:
  ExpectationBasedPointSetToPointSetMetricv4( const Self & ); //purposely not implemented
  void operator=( const Self & );               //purposely not implemented

  typedef typename PointType::VectorType                    VectorType;
  typedef typename NeighborsIdentifierType::const_iterator  NeighborsIterator;

  CoordRepType                               m_PointSetSigma;
  MeasureType                                m_PreFactor;
  MeasureType                                m_Denominator;
  unsigned int                               m_EvaluationKNeighborhood;

};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkExpectationBasedPointSetToPointSetMetricv4.hxx"
#endif

#endif