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itkImageGaussianModelEstimator.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkImageGaussianModelEstimator.h,v $
00005   Language:  C++
00006   Date:      $Date: 2002/09/11 19:39:01 $
00007   Version:   $Revision: 1.4 $
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 #ifndef _itkImageGaussianModelEstimator_h
00018 #define _itkImageGaussianModelEstimator_h
00019 
00020 #include <math.h>
00021 #include <float.h>
00022 
00023 #include "vnl/vnl_vector.h"
00024 #include "vnl/vnl_matrix.h"
00025 #include "vnl/vnl_math.h"
00026 #include "vnl/algo/vnl_matrix_inverse.h"
00027 
00028 
00029 #include "itkImageRegionIterator.h"
00030 #include "itkExceptionObject.h"
00031 
00032 #include "itkImageModelEstimatorBase.h"
00033 
00034 namespace itk
00035 {
00036 
00076 template <class TInputImage, 
00077           class TMembershipFunction,
00078           class TTrainingImage>
00079 class ITK_EXPORT ImageGaussianModelEstimator: 
00080 public ImageModelEstimatorBase<TInputImage, TMembershipFunction>
00081 {
00082 public:
00084   typedef ImageGaussianModelEstimator   Self;
00085   typedef ImageModelEstimatorBase<TInputImage,TMembershipFunction> Superclass;
00086 
00087   typedef SmartPointer<Self>  Pointer;
00088   typedef SmartPointer<const Self>  ConstPointer;
00089 
00091   itkNewMacro(Self);
00092 
00094   itkTypeMacro(ImageGaussianModelEstimator, ImageModelEstimatorBase);
00095 
00097   typedef typename TInputImage::Pointer   InputImagePointer;
00098  
00100   typedef typename TTrainingImage::Pointer TrainingImagePointer;
00101     
00104   typedef typename TInputImage::PixelType InputImagePixelType;        
00105 
00108   typedef typename TTrainingImage::PixelType TrainingImagePixelType;
00109 
00111   typedef
00112     ImageRegionIterator< TInputImage >  InputImageIterator;
00113   typedef
00114     ImageRegionIterator< TTrainingImage > TrainingImageIterator;
00115 
00117   typedef typename TMembershipFunction::Pointer MembershipFunctionPointer ;
00118 
00120   itkSetMacro(TrainingImage,TrainingImagePointer);
00121 
00123   itkGetMacro(TrainingImage,TrainingImagePointer);
00124 
00125 
00126 
00127 protected: 
00128   ImageGaussianModelEstimator();
00129   ~ImageGaussianModelEstimator();
00130   virtual void PrintSelf(std::ostream& os, Indent indent) const;
00131 
00133   void GenerateData() ;
00134 
00135 private:
00136   ImageGaussianModelEstimator(const Self&); //purposely not implemented
00137   void operator=(const Self&); //purposely not implemented
00138 
00139   typedef vnl_matrix<double> MatrixType; 
00140   typedef vnl_vector<double> VectorType;
00141 
00142   typedef typename TInputImage::SizeType InputImageSizeType;
00143 
00145   itkStaticConstMacro(VectorDimension, unsigned int,
00146                       InputImagePixelType::VectorDimension);
00147   typedef vnl_matrix_fixed<double,1,itkGetStaticConstMacro(VectorDimension)> ColumnVectorType;
00148 
00149   MatrixType            m_NumberOfSamples;
00150   MatrixType            m_Means;
00151   MatrixType            *m_Covariance;  
00152 
00153   TrainingImagePointer  m_TrainingImage;
00154 
00158   virtual void EstimateModels();
00159 
00160   void EstimateGaussianModelPrameters();
00161 
00162 }; // class ImageGaussianModelEstimator
00163 
00164 } // namespace itk
00165 
00166 #ifndef ITK_MANUAL_INSTANTIATION
00167 #include "itkImageGaussianModelEstimator.txx"
00168 #endif
00169 
00170 
00171 
00172 #endif

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