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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: 2002/11/13 00:52:54 $
00007   Version:   $Revision: 1.3 $
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 __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 #define PI 3.141592
00030 
00031 namespace itk{ 
00032   namespace Statistics{
00033 
00043 template< class TVector >
00044 class ITK_EXPORT DistanceToCentroidMembershipFunction :
00045       public MembershipFunctionBase< TVector >
00046 {
00047 public:
00049   typedef DistanceToCentroidMembershipFunction Self;
00050   typedef MembershipFunctionBase< TVector > Superclass ;
00051   typedef SmartPointer<Self> Pointer;
00052 
00054   itkTypeMacro(DistanceToCentroidMembershipFunction, MembershipFunctionBase);
00055   itkNewMacro(Self);
00056   
00058   typedef TVector MeasurementVectorType ;
00059 
00061   void SetCentroid(const vnl_vector<double> &centroid) ;
00062   
00064   const vnl_vector<double> & GetCentroid() const;
00065 
00067   itkSetMacro( NumberOfSamples, int );
00068 
00070   itkGetMacro( NumberOfSamples, int );
00071 
00075   double Evaluate(const MeasurementVectorType &measurement) const;
00076   
00077 protected:
00078   DistanceToCentroidMembershipFunction(void) ;
00079   virtual ~DistanceToCentroidMembershipFunction(void) {}
00080   void PrintSelf(std::ostream& os, Indent indent) const;
00081 
00082 private:
00083   vnl_vector< double >  m_Centroid;              // mean
00084 
00085   // Number of samples defining this density
00086   int m_NumberOfSamples;
00087 
00088   itkStaticConstMacro(VectorDimension, unsigned int, TVector::Dimension);
00089   typedef vnl_matrix_fixed<double,1,itkGetStaticConstMacro(VectorDimension)> ColumnVectorType;
00090 
00091   mutable ColumnVectorType      m_TempVec;
00092   mutable ColumnVectorType      m_TempMat;
00093 };
00094 
00095   } // end of namespace Statistics
00096 } // end namespace itk
00097 
00098 #ifndef ITK_MANUAL_INSTANTIATION
00099 #include "itkDistanceToCentroidMembershipFunction.txx"
00100 #endif
00101 
00102 #endif

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