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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: 2002/09/22 17:35:49 $
00007   Version:   $Revision: 1.5 $
00008 
00009   Copyright (c) 2002 Insight 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   
00041 template< class TSample >
00042 class GaussianMixtureModelComponent :
00043     public MixtureModelComponentBase< TSample >
00044 {
00045 public:
00047   typedef GaussianMixtureModelComponent Self;
00048   typedef MixtureModelComponentBase< TSample > Superclass ;
00049   typedef SmartPointer<Self> Pointer;
00050 
00052   itkTypeMacro(GaussianMixtureModelComponent, MixtureModelComponentBase);
00053   itkNewMacro(Self) ;
00054 
00056   itkStaticConstMacro(MeasurementVectorSize, unsigned int,
00057                       TSample::MeasurementVectorSize);
00058 
00059   typedef typename Superclass::MeasurementVectorType MeasurementVectorType ;
00060   typedef typename Superclass::MembershipFunctionType MembershipFunctionType ;
00061   typedef typename Superclass::WeightArrayType WeightArrayType ;
00062   typedef typename Superclass::ParametersType ParametersType ;
00063 
00064   typedef GaussianDensityFunction< MeasurementVectorType > NativeMembershipFunctionType ;
00065   
00066   typedef WeightedMeanCalculator< TSample > MeanEstimatorType ;
00067   typedef WeightedCovarianceCalculator< TSample > CovarianceEstimatorType ;
00068 
00069   typedef typename MeanEstimatorType::OutputType MeanType ;
00070   typedef typename CovarianceEstimatorType::OutputType CovarianceType ;
00071 
00072   void SetSample(TSample* sample) ;
00073 
00074   void SetParameters(const ParametersType &parameters) ;
00075   
00076 protected:
00077   GaussianMixtureModelComponent() ;
00078   virtual ~GaussianMixtureModelComponent() {}
00079   void PrintSelf(std::ostream& os, Indent indent) const;
00080   
00081   double CalculateParametersChange() ;
00082 
00083   void GenerateData() ;
00084 
00085 private:
00086   typename NativeMembershipFunctionType::Pointer m_GaussianDensityFunction ;
00087   MeanType m_Mean ;
00088   CovarianceType m_Covariance ;
00089   typename MeanEstimatorType::Pointer m_MeanEstimator ;
00090   typename CovarianceEstimatorType::Pointer m_CovarianceEstimator ;
00091 } ; // end of class
00092     
00093 } // end of namespace Statistics 
00094 } // end of namespace itk 
00095 
00096 #ifndef ITK_MANUAL_INSTANTIATION
00097 #include "itkGaussianMixtureModelComponent.txx"
00098 #endif
00099 
00100 #endif
00101 

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