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itkGaussianMixtureModelComponent.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkGaussianMixtureModelComponent.h,v $
00005   Language:  C++
00006   Date:      $Date: 2003/12/15 01:00:46 $
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 
00018 #ifndef __itkGaussianMixtureModelComponent_h
00019 #define __itkGaussianMixtureModelComponent_h
00020 
00021 #include "itkMixtureModelComponentBase.h"
00022 #include "itkGaussianDensityFunction.h"
00023 #include "itkWeightedMeanCalculator.h"
00024 #include "itkWeightedCovarianceCalculator.h"
00025 
00026 namespace itk{ 
00027 namespace Statistics{
00028   
00040 template< class TSample >
00041 class GaussianMixtureModelComponent :
00042     public MixtureModelComponentBase< TSample >
00043 {
00044 public:
00046   typedef GaussianMixtureModelComponent Self;
00047   typedef MixtureModelComponentBase< TSample > Superclass ;
00048   typedef SmartPointer<Self> Pointer;
00049   typedef SmartPointer<const Self> ConstPointer;
00050 
00052   itkTypeMacro(GaussianMixtureModelComponent, MixtureModelComponentBase);
00053   itkNewMacro(Self) ;
00054 
00056   itkStaticConstMacro(MeasurementVectorSize, unsigned int,
00057                       TSample::MeasurementVectorSize);
00058 
00060   typedef typename Superclass::MeasurementVectorType MeasurementVectorType ;
00061   typedef typename Superclass::MembershipFunctionType MembershipFunctionType ;
00062   typedef typename Superclass::WeightArrayType WeightArrayType ;
00063   typedef typename Superclass::ParametersType ParametersType ;
00064 
00066   typedef GaussianDensityFunction< MeasurementVectorType > 
00067   NativeMembershipFunctionType ;
00068   
00071   typedef WeightedMeanCalculator< TSample > MeanEstimatorType ;
00072   typedef WeightedCovarianceCalculator< TSample > CovarianceEstimatorType ;
00073 
00075   typedef typename MeanEstimatorType::OutputType MeanType ;
00076 
00078   typedef typename CovarianceEstimatorType::OutputType CovarianceType ;
00079 
00081   void SetSample(const TSample* sample) ;
00082 
00084   void SetParameters(const ParametersType &parameters) ;
00085   
00086 protected:
00087   GaussianMixtureModelComponent() ;
00088   virtual ~GaussianMixtureModelComponent() {}
00089   void PrintSelf(std::ostream& os, Indent indent) const;
00090   
00093   double CalculateParametersChange() ;
00094 
00096   void GenerateData() ;
00097 
00098 private:
00099   typename NativeMembershipFunctionType::Pointer m_GaussianDensityFunction ;
00100   MeanType m_Mean ;
00101   CovarianceType m_Covariance ;
00102   typename MeanEstimatorType::Pointer m_MeanEstimator ;
00103   typename CovarianceEstimatorType::Pointer m_CovarianceEstimator ;
00104 } ; // end of class
00105     
00106 } // end of namespace Statistics 
00107 } // end of namespace itk 
00108 
00109 #ifndef ITK_MANUAL_INSTANTIATION
00110 #include "itkGaussianMixtureModelComponent.txx"
00111 #endif
00112 
00113 #endif
00114 

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