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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: 2007-04-24 15:43:58 $
00007   Version:   $Revision: 1.9 $
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 
00060 class ITK_EXPORT PowellOptimizer: 
00061     public SingleValuedNonLinearOptimizer
00062 {
00063 public:
00065   typedef PowellOptimizer                Self;
00066   typedef SingleValuedNonLinearOptimizer Superclass;
00067   typedef SmartPointer<Self>             Pointer;
00068   typedef SmartPointer<const Self>       ConstPointer;
00069 
00070   typedef SingleValuedNonLinearOptimizer::ParametersType
00071                                               ParametersType;
00072   
00074   itkNewMacro(Self);
00075 
00077   itkTypeMacro(PowellOptimizer, SingleValuedNonLinearOptimizer );
00078 
00080   typedef  SingleValuedCostFunction         CostFunctionType;
00081   typedef  CostFunctionType::Pointer        CostFunctionPointer;
00082 
00084   itkSetMacro( Maximize, bool );
00085   itkGetConstReferenceMacro( Maximize, bool );
00087 
00089   itkSetMacro( MaximumIteration, unsigned int );
00090   itkGetConstReferenceMacro( MaximumIteration, unsigned int );
00092 
00094   itkSetMacro(MaximumLineIteration, unsigned int);
00095   itkGetConstMacro(MaximumLineIteration, unsigned int);
00097 
00100   itkSetMacro( StepLength, double );
00101   itkGetConstReferenceMacro( StepLength, double );
00103 
00106   itkSetMacro( StepTolerance, double );
00107   itkGetConstReferenceMacro( StepTolerance, double );
00109 
00113   itkSetMacro( ValueTolerance, double );
00114   itkGetConstReferenceMacro( ValueTolerance, double );
00116 
00118   itkGetConstReferenceMacro( CurrentCost, MeasureType );
00119   MeasureType GetValue() const { return this->GetCurrentCost(); }
00121 
00123   itkGetConstReferenceMacro( CurrentIteration, unsigned int);
00124 
00126   itkGetConstReferenceMacro( CurrentLineIteration, unsigned int);
00127 
00129   void StartOptimization();
00130 
00134   void StopOptimization() 
00135     { m_Stop = true; }
00136 
00137 protected:
00138   PowellOptimizer();
00139   PowellOptimizer(const PowellOptimizer&);
00140   virtual ~PowellOptimizer();
00141   void PrintSelf(std::ostream& os, Indent indent) const;
00142 
00143   itkSetMacro(CurrentCost, double);
00144 
00147   void SetLine(const ParametersType & origin,
00148                const vnl_vector<double> & direction);
00149 
00153   double GetLineValue(double x) const;
00154 
00157   void   SetCurrentLinePoint(double x, double fx);
00158 
00161   void   Swap(double *a, double *b) const;
00162 
00165   void   Shift(double *a, double *b, double *c, double d) const;
00166 
00176   virtual void   LineBracket(double *ax, double *bx, double *cx,
00177                              double *fa, double *fb, double *fc);
00178 
00184   virtual void   BracketedLineOptimize(double ax, double bx, double cx,
00185                                        double fa, double fb, double fc,
00186                                        double * extX, double * extVal);
00187 
00188   itkGetMacro(SpaceDimension, unsigned int);
00189   itkSetMacro(SpaceDimension, unsigned int);
00190 
00191   itkSetMacro(CurrentIteration, unsigned int);
00192 
00193   itkGetMacro(Stop, bool);
00194   itkSetMacro(Stop, bool);
00195 
00196 private:
00197   unsigned int       m_SpaceDimension;
00198 
00200   unsigned int       m_CurrentIteration;
00201   unsigned int       m_CurrentLineIteration;
00202 
00204   unsigned int       m_MaximumIteration;
00205   unsigned int       m_MaximumLineIteration;
00206 
00208   bool               m_Maximize;
00209 
00211   double             m_StepLength;
00212   double             m_StepTolerance;
00213 
00214   ParametersType     m_LineOrigin;
00215   vnl_vector<double> m_LineDirection;
00216 
00217   double             m_ValueTolerance;
00218 
00220   MeasureType        m_CurrentCost;
00221 
00226   bool               m_Stop;
00227 
00228 }; // end of class
00229 
00230 } // end of namespace itk
00231 
00232 #endif
00233 

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