itkObjectToObjectMetric.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
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 *         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
 *  limitations under the License.
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#ifndef __itkObjectToObjectMetric_h
#define __itkObjectToObjectMetric_h

#include "itkSingleValuedCostFunctionv4.h"

namespace itk
{

class ITK_EXPORT ObjectToObjectMetric:
  public SingleValuedCostFunctionv4
{
public:
  typedef ObjectToObjectMetric         Self;
  typedef SingleValuedCostFunctionv4   Superclass;
  typedef SmartPointer< Self >         Pointer;
  typedef SmartPointer< const Self >   ConstPointer;

  itkTypeMacro(ObjectToObjectMetric, SingleValuedCostFunctionv4);

  typedef Superclass::ParametersValueType CoordinateRepresentationType;

  typedef double                          InternalComputationValueType;

  typedef  Superclass::MeasureType        MeasureType;

  typedef  Superclass::DerivativeType     DerivativeType;

  typedef  Superclass::ParametersType       ParametersType;
  typedef  Superclass::ParametersValueType  ParametersValueType;

  typedef enum  { GRADIENT_SOURCE_FIXED=0,
                  GRADIENT_SOURCE_MOVING,
                  GRADIENT_SOURCE_BOTH } GradientSourceType;

  itkSetMacro( GradientSource, GradientSourceType );

  itkGetConstMacro( GradientSource, GradientSourceType );

  bool GetGradientSourceIncludesFixed() const;

  bool GetGradientSourceIncludesMoving() const;

  virtual void Initialize(void) throw ( ExceptionObject ) = 0;

  typedef unsigned int NumberOfParametersType;

  virtual NumberOfParametersType GetNumberOfParameters() const = 0;
  virtual NumberOfParametersType GetNumberOfLocalParameters() const = 0;

  virtual void SetParameters( ParametersType & params ) = 0;

  virtual const ParametersType & GetParameters() const = 0;

  virtual bool HasLocalSupport() const = 0;

  virtual void UpdateTransformParameters( DerivativeType & derivative,
                                          ParametersValueType factor = NumericTraits<ParametersValueType>::One) = 0;

protected:
  ObjectToObjectMetric();
  virtual ~ObjectToObjectMetric();

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

  GradientSourceType       m_GradientSource;

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

};
} // end namespace itk

#endif