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Numerics/Statistics/itkMixtureModelComponentBase.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkMixtureModelComponentBase.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-03-04 15:24:02 $
00007   Version:   $Revision: 1.10 $
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 __itkMixtureModelComponentBase_h
00018 #define __itkMixtureModelComponentBase_h
00019 
00020 #include <vnl/vnl_vector.h>
00021 #include <vnl/vnl_matrix.h>
00022 
00023 #include "itkArray.h"
00024 #include "itkObject.h"
00025 #include "itkMembershipFunctionBase.h"
00026 
00027 namespace itk { 
00028 namespace Statistics {
00029   
00052 template< class TSample >
00053 class MixtureModelComponentBase :
00054     public Object
00055 {
00056 public:
00058   typedef MixtureModelComponentBase Self;
00059   typedef Object                    Superclass;
00060   typedef SmartPointer<Self>        Pointer;
00061   typedef SmartPointer<const Self>  ConstPointer;
00062 
00064   itkTypeMacro(MixtureModelComponentBase, Object);
00065   itkNewMacro(Self);
00067 
00068   typedef typename TSample::MeasurementVectorType     MeasurementVectorType;
00069   typedef typename TSample::MeasurementVectorSizeType MeasurementVectorSizeType;
00070 
00072   typedef MembershipFunctionBase< MeasurementVectorType >
00073   MembershipFunctionType;
00074 
00076   typedef Array< double > WeightArrayType;
00077 
00078   typedef Array< double > ParametersType;
00079 
00081   virtual void SetSample(const TSample* sample);
00082 
00084   const TSample* GetSample() const;
00085 
00090   MembershipFunctionType* GetMembershipFunction();
00091 
00092   void SetMinimalParametersChange(double change)
00093     { m_MinimalParametersChange = change; }
00094 
00095   double GetMinimalParametersChange()
00096     { return m_MinimalParametersChange; }
00097 
00098   virtual void SetParameters(const ParametersType &parameters);
00099 
00100   virtual ParametersType GetFullParameters()
00101     { return m_Parameters; }
00102 
00103 
00106   void AreParametersModified(bool flag);
00107 
00109   bool AreParametersModified();
00110 
00112   void SetWeight(int index, double value);
00113 
00115   double GetWeight(int index);
00116 
00118   double Evaluate(MeasurementVectorType& measurements);
00119 
00121   WeightArrayType* GetWeights();
00122 
00123   virtual void Update();
00124   
00125 protected:
00126   MixtureModelComponentBase();
00127   virtual ~MixtureModelComponentBase();
00128   void PrintSelf(std::ostream& os, Indent indent) const;
00129 
00131   void CreateWeightArray();
00132 
00134   void DeleteWeightArray();
00135 
00139   void SetMembershipFunction(MembershipFunctionType* function);
00140 
00141   virtual void GenerateData();
00142 
00143 private:
00145   const TSample* m_Sample;
00146 
00147   double m_MinimalParametersChange;
00148 
00149   ParametersType m_Parameters;
00151   MembershipFunctionType* m_MembershipFunction;
00152 
00154   WeightArrayType* m_Weights;
00155 
00157   bool m_ParametersModified;
00158 
00159 }; // end of class
00160     
00161 } // end of namespace Statistics 
00162 } // end of namespace itk 
00163 
00164 #ifndef ITK_MANUAL_INSTANTIATION
00165 #include "itkMixtureModelComponentBase.txx"
00166 #endif
00167 
00168 #endif
00169 

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