itkLevenbergMarquardtOptimizer.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 __itkLevenbergMarquardtOptimizer_h
#define __itkLevenbergMarquardtOptimizer_h

#include "itkMultipleValuedNonLinearVnlOptimizer.h"
#include "vnl/algo/vnl_levenberg_marquardt.h"

namespace itk
{
class LevenbergMarquardtOptimizer:
  public MultipleValuedNonLinearVnlOptimizer
{
public:
  typedef LevenbergMarquardtOptimizer         Self;
  typedef MultipleValuedNonLinearVnlOptimizer Superclass;
  typedef SmartPointer< Self >                Pointer;
  typedef SmartPointer< const Self >          ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(LevenbergMarquardtOptimizer, MultipleValuedNonLinearVnlOptimizer);

  typedef   vnl_vector< double > InternalParametersType;

  typedef   vnl_levenberg_marquardt InternalOptimizerType;

  vnl_levenberg_marquardt * GetOptimizer(void) const;

  void StartOptimization(void);

  virtual void SetCostFunction(MultipleValuedCostFunction *costFunction);

  void SetNumberOfIterations(unsigned int iterations);

  void SetValueTolerance(double tol);

  void SetGradientTolerance(double tol);

  void SetEpsilonFunction(double epsilon);

  MeasureType GetValue() const;

  const std::string GetStopConditionDescription() const;

protected:
  LevenbergMarquardtOptimizer();
  virtual ~LevenbergMarquardtOptimizer();

  typedef Superclass::CostFunctionAdaptorType CostFunctionAdaptorType;

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

  bool                   m_OptimizerInitialized;
  InternalOptimizerType *m_VnlOptimizer;
  unsigned int           m_NumberOfIterations;
  double                 m_ValueTolerance;
  double                 m_GradientTolerance;
  double                 m_EpsilonFunction;
};
} // end namespace itk

#endif