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Numerics/Statistics/itkDistanceToCentroidMembershipFunction.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkDistanceToCentroidMembershipFunction.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-03-04 15:23:46 $
00007   Version:   $Revision: 1.11 $
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 __itkDistanceToCentroidMembershipFunction_h
00018 #define __itkDistanceToCentroidMembershipFunction_h
00019 
00020 #include <vnl/vnl_vector.h>
00021 #include <vnl/vnl_transpose.h>
00022 #include <vnl/vnl_matrix.h>
00023 #include <vnl/algo/vnl_matrix_inverse.h>
00024 #include <vnl/algo/vnl_determinant.h>
00025 
00026 
00027 #include "itkMembershipFunctionBase.h"
00028 
00029 namespace itk { 
00030 namespace Statistics {
00031 
00041 template< class TVector >
00042 class ITK_EXPORT DistanceToCentroidMembershipFunction :
00043       public MembershipFunctionBase< TVector >
00044 {
00045 public:
00047   typedef DistanceToCentroidMembershipFunction Self;
00048   typedef MembershipFunctionBase< TVector >    Superclass;
00049   typedef SmartPointer<Self>                   Pointer;
00050   typedef SmartPointer<const Self>             ConstPointer;
00051 
00053   itkTypeMacro(DistanceToCentroidMembershipFunction,
00054                MembershipFunctionBase);
00055   itkNewMacro(Self);
00057 
00059   typedef TVector MeasurementVectorType;
00060 
00062   typedef typename Superclass::MeasurementVectorSizeType 
00063                                                   MeasurementVectorSizeType;
00064 
00066   virtual void SetMeasurementVectorSize( const MeasurementVectorSizeType );
00067 
00069   void SetCentroid(const vnl_vector<double> &centroid);
00070 
00072   const vnl_vector<double> & GetCentroid() const;
00073 
00075   itkSetMacro( NumberOfSamples, int );
00076 
00078   itkGetMacro( NumberOfSamples, int );
00079 
00083   double Evaluate(const MeasurementVectorType &measurement) const;
00084 
00085 protected:
00086   DistanceToCentroidMembershipFunction(void);
00087   virtual ~DistanceToCentroidMembershipFunction(void) {}
00088   void PrintSelf(std::ostream& os, Indent indent) const;
00089 
00090 private:
00091   vnl_vector< double >  m_Centroid;              // mean
00092 
00093   // Number of samples defining this density
00094   int m_NumberOfSamples;
00095 };
00096 
00097 } // end of namespace Statistics
00098 } // end namespace itk
00099 
00100 #ifndef ITK_MANUAL_INSTANTIATION
00101 #include "itkDistanceToCentroidMembershipFunction.txx"
00102 #endif
00103 
00104 #endif
00105 

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