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itkWeightedCovarianceCalculator.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkWeightedCovarianceCalculator.h,v $
00005   Language:  C++
00006   Date:      $Date: 2003/12/09 16:53:08 $
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 __itkWeightedCovarianceCalculator_h
00018 #define __itkWeightedCovarianceCalculator_h
00019 
00020 #include "itkVector.h"
00021 #include "itkMatrix.h"
00022 #include "itkSampleAlgorithmBase.h"
00023 
00024 namespace itk{ 
00025 namespace Statistics{
00026   
00034 template< class TSample >
00035 class WeightedCovarianceCalculator :
00036       public SampleAlgorithmBase< TSample >
00037 {
00038 public:
00040   typedef WeightedCovarianceCalculator Self;
00041   typedef SampleAlgorithmBase< TSample > Superclass ;
00042   typedef SmartPointer<Self> Pointer;
00043   typedef SmartPointer<const Self> ConstPointer;
00044 
00046   itkTypeMacro(WeightedCovarianceCalculator, SampleAlgorithmBase);
00047   itkNewMacro(Self) ;
00048 
00049   itkStaticConstMacro(MeasurementVectorSize, unsigned int,
00050                       TSample::MeasurementVectorSize);
00051 
00053   typedef typename TSample::MeasurementVectorType MeasurementVectorType ;
00054   
00056   typedef FunctionBase< MeasurementVectorType, double > WeightFunctionType ;
00057 
00059   typedef Matrix< double,
00060                   itkGetStaticConstMacro(MeasurementVectorSize),
00061                   itkGetStaticConstMacro(MeasurementVectorSize) > 
00062           OutputType ;
00063 
00065   typedef Vector< double, itkGetStaticConstMacro(MeasurementVectorSize) >
00066           MeanType ;
00067 
00069   typedef Array< double > WeightArrayType ;
00070 
00072   void SetWeights(WeightArrayType* array) ;
00073 
00075   WeightArrayType* GetWeights() ;
00076 
00080   void SetWeightFunction(WeightFunctionType* func) ;
00081 
00083   WeightFunctionType* GetWeightFunction() ;
00084   
00086   void SetMean(MeanType* mean) ;
00087 
00089   MeanType* GetMean() ;
00090 
00092   OutputType* GetOutput() ;
00093 
00094 protected:
00095   WeightedCovarianceCalculator() ;
00096   virtual ~WeightedCovarianceCalculator() ;
00097   void PrintSelf(std::ostream& os, Indent indent) const;
00098 
00100   void GenerateData() ;
00101 
00102   void ComputeCovarianceWithGivenMean() ;
00103   
00104   void ComputeCovarianceWithoutGivenMean() ;
00105 
00106 private:
00107   OutputType* m_Output ;
00108   MeanType* m_Mean ;
00109   MeanType* m_InternalMean ;
00110   WeightArrayType* m_Weights ;
00111   WeightFunctionType* m_WeightFunction ;
00112 } ; // end of class
00113     
00114   } // end of namespace Statistics 
00115 } // end of namespace itk 
00116 
00117 #ifndef ITK_MANUAL_INSTANTIATION
00118 #include "itkWeightedCovarianceCalculator.txx"
00119 #endif
00120 
00121 #endif
00122 

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