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itkMultipleValuedVnlCostFunctionAdaptor.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkMultipleValuedVnlCostFunctionAdaptor.h,v $
00005   Language:  C++
00006   Date:      $Date: 2007-03-22 21:39:37 $
00007   Version:   $Revision: 1.7 $
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 __itkMultipleValuedVnlCostFunctionAdaptor_h
00018 #define __itkMultipleValuedVnlCostFunctionAdaptor_h
00019 
00020 #include "itkMultipleValuedCostFunction.h"
00021 #include "vnl/vnl_least_squares_function.h"
00022 
00023 
00024 namespace itk
00025 {
00026   
00036 class MultipleValuedVnlCostFunctionAdaptor : 
00037     public vnl_least_squares_function
00038 {
00039 public:
00040 
00042   typedef   vnl_vector<double>     InternalParametersType;
00043 
00045   typedef   vnl_vector<double>     InternalMeasureType;
00046 
00048   typedef   vnl_matrix<double>     InternalDerivativeType;
00049 
00051   typedef MultipleValuedCostFunction::MeasureType   MeasureType;
00052 
00054   typedef MultipleValuedCostFunction::ParametersType ParametersType;
00055 
00057   typedef MultipleValuedCostFunction::DerivativeType DerivativeType;
00058 
00060   typedef Array<double>             ScalesType;
00061 
00063   MultipleValuedVnlCostFunctionAdaptor( unsigned int spaceDimension,
00064                                         unsigned int numberOfValues );
00065 
00067   void SetCostFunction( MultipleValuedCostFunction * costFunction )
00068   { m_CostFunction = costFunction; }
00069 
00071   const MultipleValuedCostFunction * GetCostFunction( void ) const
00072   { return m_CostFunction; }
00073 
00075   virtual void f( const InternalParametersType & inparameters,
00076                   InternalMeasureType    & measures      );
00077 
00079   virtual void gradf(const InternalParametersType   & inparameters,
00080                      InternalDerivativeType   & gradient );
00081 
00083   virtual void compute(const InternalParametersType   & x,
00084                        InternalMeasureType      * f, 
00085                        InternalDerivativeType   * g   );
00086 
00088   void ConvertExternalToInternalGradient(
00089     const DerivativeType         & input,
00090     InternalDerivativeType & output );
00091 
00093   void ConvertExternalToInternalMeasures(
00094     const MeasureType         & input,
00095     InternalMeasureType & output );
00096 
00100   void SetUseGradient(bool);
00101   void UseGradientOn()  { this->SetUseGradient( true  ); }
00102   void UseGradientOff() { this->SetUseGradient( false ); }
00103   bool GetUseGradient() const;
00105 
00107   void SetScales(const ScalesType & scales);
00108 
00113   unsigned long AddObserver(const EventObject & event, Command *) const;
00114 
00119   const MeasureType & GetCachedValue() const;
00120   const DerivativeType & GetCachedDerivative() const;
00121   const ParametersType & GetCachedCurrentParameters() const;
00123 
00124 protected:
00125 
00128   void ReportIteration( const EventObject & event ) const;
00129 
00130 
00131 private:
00132 
00133   MultipleValuedCostFunction::Pointer   m_CostFunction;
00134 
00135   bool                    m_ScalesInitialized;
00136   ScalesType              m_Scales;
00137   Object::Pointer         m_Reporter;
00138 
00139   mutable MeasureType     m_CachedValue;
00140   mutable DerivativeType  m_CachedDerivative;
00141   mutable ParametersType  m_CachedCurrentParameters;
00142 
00143 };  // end of Class CostFunction
00144 
00145     
00146 } // end namespace itk
00147 
00148 
00149 #endif
00150 

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