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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: 2008-06-30 15:34:58 $
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 __itkWeightedCovarianceCalculator_h
00018 #define __itkWeightedCovarianceCalculator_h
00019 
00020 #include "itkArray.h"
00021 #include "itkVariableSizeMatrix.h"
00022 #include "itkSampleAlgorithmBase.h"
00023 
00024 namespace itk{ 
00025 namespace Statistics{
00026   
00041 template< class TSample >
00042 class WeightedCovarianceCalculator :
00043       public SampleAlgorithmBase< TSample >
00044 {
00045 public:
00047   typedef WeightedCovarianceCalculator Self;
00048   typedef SampleAlgorithmBase< TSample > Superclass;
00049   typedef SmartPointer<Self> Pointer;
00050   typedef SmartPointer<const Self> ConstPointer;
00051 
00053   itkTypeMacro(WeightedCovarianceCalculator, SampleAlgorithmBase);
00054   itkNewMacro(Self);
00056 
00058   typedef typename Superclass::MeasurementVectorSizeType MeasurementVectorSizeType;
00059 
00061   typedef typename TSample::MeasurementVectorType MeasurementVectorType;
00062 
00064   typedef FunctionBase< MeasurementVectorType, double > WeightFunctionType;
00065 
00067   typedef Array< double >                               MeanType;
00068 
00070   typedef VariableSizeMatrix< double >                  OutputType;
00071 
00073   typedef Array< double > WeightArrayType;
00074 
00076   void SetWeights(WeightArrayType* array);
00077 
00079   WeightArrayType* GetWeights( void );
00080 
00083   void SetWeightFunction(WeightFunctionType* func);
00084 
00086   WeightFunctionType* GetWeightFunction( void );
00087 
00089   void SetMean(MeanType* mean);
00090 
00092   MeanType* GetMean( void );
00093 
00095   OutputType* GetOutput( void );
00096 
00097 protected:
00098   WeightedCovarianceCalculator();
00099   virtual ~WeightedCovarianceCalculator();
00100   void PrintSelf(std::ostream& os, Indent indent) const;
00101 
00103   void GenerateData( void );
00104 
00105   void ComputeCovarianceWithGivenMean( void );
00106   
00107   void ComputeCovarianceWithoutGivenMean( void );
00108 
00109 private:
00110   OutputType* m_Output;
00111   MeanType* m_Mean;
00112   MeanType* m_InternalMean;
00113   WeightArrayType* m_Weights;
00114   WeightFunctionType* m_WeightFunction;
00115 }; // end of class
00116     
00117   } // end of namespace Statistics 
00118 } // end of namespace itk 
00119 
00120 #ifndef ITK_MANUAL_INSTANTIATION
00121 #include "itkWeightedCovarianceCalculator.txx"
00122 #endif
00123 
00124 #endif
00125 
00126 

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