itkFRPROptimizer.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkFRPROptimizer.h,v $
  Language:  C++
  Date:      $Date: 2008-02-04 22:58:54 $
  Version:   $Revision: 1.5 $

  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 __itkFRPROptimizer_h
#define __itkFRPROptimizer_h

#include <itkVector.h>
#include <itkMatrix.h>
#include <itkPowellOptimizer.h>

namespace itk
{

class ITK_EXPORT FRPROptimizer: 
    public PowellOptimizer
{
public:
  typedef FRPROptimizer            Self;
  typedef PowellOptimizer          Superclass;
  typedef SmartPointer<Self>       Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  typedef SingleValuedNonLinearOptimizer::ParametersType ParametersType;
  
  itkNewMacro(Self);

  itkTypeMacro(FRPROptimizer, PowellOptimizer );

  typedef  SingleValuedCostFunction         CostFunctionType;
  typedef  CostFunctionType::Pointer        CostFunctionPointer;

  itkSetMacro( UseUnitLengthGradient, bool );
  itkGetConstMacro( UseUnitLengthGradient, bool );

  void StartOptimization();

  void SetToFletchReeves();

  void SetToPolakRibiere();

protected:
  FRPROptimizer();
  virtual ~FRPROptimizer(); 

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

  virtual void GetValueAndDerivative(ParametersType p, double * val,
                                     ParametersType * xi);

  virtual void   LineOptimize(ParametersType * p, ParametersType xi,
                              double * val );


private:
  FRPROptimizer(const FRPROptimizer&); // not implemented

  typedef enum 
    {
    FletchReeves,
    PolakRibiere
    }               OptimizationType;

  OptimizationType  m_OptimizationType;

  bool              m_UseUnitLengthGradient;

}; // end of class

} // end of namespace itk

#endif

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