itkSingleValuedCostFunction.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
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  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.
 *
 *=========================================================================*/
#ifndef __itkSingleValuedCostFunction_h
#define __itkSingleValuedCostFunction_h

#include "itkCostFunction.h"
#include "itkNumericTraits.h"

namespace itk
{
class ITK_EXPORT SingleValuedCostFunction:
  public CostFunction
{
public:
  typedef SingleValuedCostFunction   Self;
  typedef CostFunction               Superclass;
  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;

  itkTypeMacro(SingleValuedCostFunction, CostFunction);

  typedef double MeasureType;

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

  typedef Array< ParametersValueType > DerivativeType;

  virtual MeasureType GetValue(const ParametersType & parameters) const = 0;

  virtual void GetDerivative(const ParametersType & parameters,
                             DerivativeType & derivative) const = 0;

  virtual void GetValueAndDerivative(const ParametersType & parameters,
                                     MeasureType & value,
                                     DerivativeType & derivative) const
  {
    value = this->GetValue(parameters);
    this->GetDerivative(parameters, derivative);
  }

protected:
  SingleValuedCostFunction() {}
  virtual ~SingleValuedCostFunction() {}

private:
  SingleValuedCostFunction(const Self &); //purposely not implemented
  void operator=(const Self &);           //purposely not implemented
};
} // end namespace itk

#endif