itkExhaustiveOptimizer.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkExhaustiveOptimizer.h,v $
  Language:  C++
  Date:      $Date: 2009-06-24 23:35:49 $
  Version:   $Revision: 1.8 $

  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 __itkExhaustiveOptimizer_h
#define __itkExhaustiveOptimizer_h

#include "itkSingleValuedNonLinearOptimizer.h"

namespace itk
{
  
class ITK_EXPORT ExhaustiveOptimizer : 
                    public SingleValuedNonLinearOptimizer
{
public:
  typedef ExhaustiveOptimizer            Self;
  typedef SingleValuedNonLinearOptimizer Superclass;
  typedef SmartPointer<Self>             Pointer;
  typedef SmartPointer<const Self>       ConstPointer;
  
  typedef Array< unsigned long > StepsType;
  itkNewMacro(Self);
  
  itkTypeMacro( ExhaustiveOptimizer, SingleValuedNonLinearOptimizer );
 
  virtual void    StartOptimization( void );

  void StartWalking( void );
  void ResumeWalking( void );
  void StopWalking(void);
  
  itkSetMacro( StepLength, double );
  itkSetMacro( NumberOfSteps, StepsType );
  itkGetConstReferenceMacro( StepLength, double );
  itkGetConstReferenceMacro( NumberOfSteps, StepsType );
  itkGetConstReferenceMacro( CurrentValue, MeasureType );
  itkGetConstReferenceMacro( MaximumMetricValue, MeasureType );
  itkGetConstReferenceMacro( MinimumMetricValue, MeasureType );
  itkGetConstReferenceMacro( MinimumMetricValuePosition, ParametersType );
  itkGetConstReferenceMacro( MaximumMetricValuePosition, ParametersType );
  itkGetConstReferenceMacro( CurrentIndex, ParametersType );
  itkGetConstReferenceMacro( MaximumNumberOfIterations, unsigned long );

  const std::string GetStopConditionDescription() const;

protected:
  ExhaustiveOptimizer();
  virtual ~ExhaustiveOptimizer() {};
  void PrintSelf(std::ostream& os, Indent indent) const;

  void AdvanceOneStep( void );
  void IncrementIndex( ParametersType & param );

  
protected:
  MeasureType          m_CurrentValue;
  StepsType            m_NumberOfSteps;
  unsigned long        m_CurrentIteration;
  bool                 m_Stop;
  unsigned int         m_CurrentParameter;
  double               m_StepLength; 
  ParametersType       m_CurrentIndex;
  unsigned long        m_MaximumNumberOfIterations;
  MeasureType          m_MaximumMetricValue;
  MeasureType          m_MinimumMetricValue;
  ParametersType       m_MinimumMetricValuePosition;
  ParametersType       m_MaximumMetricValuePosition;
  
private:  
  ExhaustiveOptimizer(const Self&); //purposely not implemented
  void operator=(const Self&);//purposely not implemented

  OStringStream m_StopConditionDescription;
};

} // end namespace itk

#endif