itkConjugateGradientOptimizer.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkConjugateGradientOptimizer.h,v $
  Language:  C++
  Date:      $Date: 2005/05/17 00:06:29 $
  Version:   $Revision: 1.26 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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 __itkConjugateGradientOptimizer_h
#define __itkConjugateGradientOptimizer_h

#include "itkSingleValuedNonLinearVnlOptimizer.h"
#include "vnl/algo/vnl_conjugate_gradient.h"

namespace itk
{
  
class ITK_EXPORT ConjugateGradientOptimizer : 
    public SingleValuedNonLinearVnlOptimizer

{
public:
  typedef ConjugateGradientOptimizer          Self;
  typedef SingleValuedNonLinearVnlOptimizer   Superclass;
  typedef SmartPointer<Self>                  Pointer;
  typedef SmartPointer<const Self>            ConstPointer;
  
  itkNewMacro(Self);
  
  itkTypeMacro( ConjugateGradientOptimizer, SingleValuedNonLinearOptimizer );

  typedef   vnl_vector<double>     InternalParametersType;

  typedef   vnl_conjugate_gradient InternalOptimizerType;

  vnl_conjugate_gradient * GetOptimizer(void);

  void StartOptimization( void );

  virtual void SetCostFunction( SingleValuedCostFunction * costFunction );

  unsigned long GetNumberOfIterations(void) const;
  unsigned long GetCurrentIteration(void) const;

  MeasureType GetValue() const;

protected:
  ConjugateGradientOptimizer();
  virtual ~ConjugateGradientOptimizer();

  typedef Superclass::CostFunctionAdaptorType   CostFunctionAdaptorType;

private:
  ConjugateGradientOptimizer(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  bool                         m_OptimizerInitialized;
  InternalOptimizerType      * m_VnlOptimizer;

};

} // end namespace itk


#endif

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