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itkPowellOptimizer.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkPowellOptimizer.h,v $
00005   Language:  C++
00006   Date:      $Date: 2005/10/03 18:10:24 $
00007   Version:   $Revision: 1.5 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkPowellOptimizer_h
00018 #define __itkPowellOptimizer_h
00019 
00020 #include <itkVector.h>
00021 #include <itkMatrix.h>
00022 #include <itkSingleValuedNonLinearOptimizer.h>
00023 
00024 namespace itk
00025 {
00026 
00054 class ITK_EXPORT PowellOptimizer: 
00055     public SingleValuedNonLinearOptimizer
00056 {
00057 public:
00059   typedef PowellOptimizer             Self ;
00060   typedef SingleValuedNonLinearOptimizer      Superclass;
00061   typedef SmartPointer<Self>                  Pointer;
00062   typedef SmartPointer<const Self>            ConstPointer;
00063 
00064   typedef SingleValuedNonLinearOptimizer::ParametersType
00065                                               ParametersType;
00066   
00068   itkNewMacro(Self);
00069 
00071   itkTypeMacro(PowellOptimizer, SingleValuedNonLinearOptimizer );
00072 
00074   typedef  SingleValuedCostFunction         CostFunctionType;
00075   typedef  CostFunctionType::Pointer        CostFunctionPointer;
00076 
00078   itkSetMacro( Maximize, bool );
00079   itkGetConstReferenceMacro( Maximize, bool );
00081 
00083   itkSetMacro( MaximumIteration, unsigned int );
00084   itkGetConstReferenceMacro( MaximumIteration, unsigned int );
00086 
00088   itkSetMacro(MaximumLineIteration, unsigned int);
00089   itkGetConstMacro(MaximumLineIteration, unsigned int);
00091 
00094   itkSetMacro( StepLength, double ) ;
00095   itkGetConstReferenceMacro( StepLength, double );
00097 
00100   itkSetMacro( StepTolerance, double ) ;
00101   itkGetConstReferenceMacro( StepTolerance, double );
00103 
00107   itkSetMacro( ValueTolerance, double ) ;
00108   itkGetConstReferenceMacro( ValueTolerance, double );
00110 
00112   itkGetConstReferenceMacro( CurrentCost, MeasureType );
00113   MeasureType GetValue() const { return this->GetCurrentCost(); }
00115 
00117   itkGetConstReferenceMacro( CurrentIteration, unsigned int);
00118 
00120   itkGetConstReferenceMacro( CurrentLineIteration, unsigned int);
00121 
00123   void StartOptimization() ;
00124 
00128   void StopOptimization() 
00129     { m_Stop = true ; }
00130 
00131 protected:
00132   PowellOptimizer() ;
00133   PowellOptimizer(const PowellOptimizer&) ;
00134   virtual ~PowellOptimizer() ;
00135   void PrintSelf(std::ostream& os, Indent indent) const;
00136 
00137   itkSetMacro(CurrentCost, double);
00138 
00141   void SetLine(const ParametersType & origin,
00142                const vnl_vector<double> & direction);
00143 
00147   double GetLineValue(double x) const;
00148 
00151   void   SetCurrentLinePoint(double x, double fx);
00152 
00155   void   Swap(double *a, double *b) const;
00156 
00159   void   Shift(double *a, double *b, double *c, double d) const;
00160 
00167   virtual void   LineBracket(double *ax, double *bx, double *cx,
00168                              double *fa, double *fb, double *fc);
00169 
00175   virtual void   BracketedLineOptimize(double ax, double bx, double cx,
00176                                        double fa, double fb, double fc,
00177                                        double * extX, double * extVal);
00178 
00179   itkGetMacro(SpaceDimension, unsigned int);
00180   itkSetMacro(SpaceDimension, unsigned int);
00181 
00182   itkSetMacro(CurrentIteration, unsigned int);
00183 
00184   itkGetMacro(Stop, bool);
00185   itkSetMacro(Stop, bool);
00186 
00187  private:
00188 
00189   unsigned int       m_SpaceDimension;
00190 
00192   unsigned int       m_CurrentIteration ;
00193   unsigned int       m_CurrentLineIteration ;
00194 
00196   unsigned int       m_MaximumIteration ;
00197   unsigned int       m_MaximumLineIteration ;
00198 
00200   bool               m_Maximize;
00201 
00203   double             m_StepLength ;
00204   double             m_StepTolerance ;
00205 
00206   ParametersType     m_LineOrigin;
00207   vnl_vector<double> m_LineDirection;
00208 
00209   double             m_ValueTolerance;
00210 
00212   MeasureType        m_CurrentCost;
00213 
00218   bool               m_Stop ;
00219 
00220 } ; // end of class
00221 
00222 } // end of namespace itk
00223 
00224 #endif
00225 

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