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itkMahalanobisDistanceThresholdImageFunction.h

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00001 /*========================================================================= 00002 00003 Program: Insight Segmentation & Registration Toolkit 00004 Module: $RCSfile: itkMahalanobisDistanceThresholdImageFunction.h,v $ 00005 Language: C++ 00006 Date: $Date: 2003/09/10 14:29:14 $ 00007 Version: $Revision: 1.3 $ 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 _itkMahalanobisDistanceThresholdImageFunction_h 00018 #define _itkMahalanobisDistanceThresholdImageFunction_h 00019 00020 #include "itkImageFunction.h" 00021 #include "itkMahalanobisDistanceMembershipFunction.h" 00022 00023 namespace itk 00024 { 00025 00046 template <class TInputImage, class TCoordRep = float> 00047 class ITK_EXPORT MahalanobisDistanceThresholdImageFunction : 00048 public ImageFunction<TInputImage,bool,TCoordRep> 00049 { 00050 public: 00052 typedef MahalanobisDistanceThresholdImageFunction Self; 00053 typedef ImageFunction<TInputImage,bool,TCoordRep> Superclass; 00054 typedef SmartPointer<Self> Pointer; 00055 typedef SmartPointer<const Self> ConstPointer; 00056 00058 itkTypeMacro(MahalanobisDistanceThresholdImageFunction, ImageFunction); 00059 00061 itkNewMacro(Self); 00062 00064 typedef typename Superclass::InputImageType InputImageType; 00065 00067 typedef typename TInputImage::PixelType PixelType; 00068 00070 itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension); 00071 00073 typedef typename Superclass::PointType PointType; 00074 00076 typedef typename Superclass::IndexType IndexType; 00077 00079 typedef typename Superclass::ContinuousIndexType ContinuousIndexType; 00080 00082 typedef vnl_matrix<double> CovarianceMatrixType; 00083 00085 typedef vnl_vector<double> MeanVectorType; 00086 00096 virtual bool Evaluate( const PointType& point ) const 00097 { 00098 IndexType index; 00099 this->ConvertPointToNearestIndex( point, index ); 00100 return ( this->EvaluateAtIndex( index ) ); 00101 } 00102 00111 virtual bool EvaluateAtContinuousIndex( 00112 const ContinuousIndexType & index ) const 00113 { 00114 IndexType nindex; 00115 00116 this->ConvertContinuousIndexToNearestIndex (index, nindex); 00117 return this->EvaluateAtIndex(nindex); 00118 } 00119 00128 virtual bool EvaluateAtIndex( const IndexType & index ) const 00129 { 00130 double mahalanobisDistance = 00131 m_MahalanobisDistanceMembershipFunction->Evaluate( 00132 m_Image->GetPixel( index ) ); 00133 return ( sqrt( mahalanobisDistance ) <= m_Threshold ); 00134 } 00135 00137 itkGetConstMacro(Threshold,double); 00138 itkSetMacro(Threshold,double); 00139 00141 void SetMean(const MeanVectorType &mean); 00142 const MeanVectorType & GetMean() const; 00143 00148 void SetCovariance(const CovarianceMatrixType &cov); 00149 const CovarianceMatrixType & GetCovariance() const; 00150 00151 00152 protected: 00153 MahalanobisDistanceThresholdImageFunction(); 00154 ~MahalanobisDistanceThresholdImageFunction(){}; 00155 void PrintSelf(std::ostream& os, Indent indent) const; 00156 00157 private: 00158 MahalanobisDistanceThresholdImageFunction( const Self& ); //purposely not implemented 00159 void operator=( const Self& ); //purposely not implemented 00160 00161 double m_Threshold; 00162 00163 // This is intended only for Image of Vector pixel type. 00164 typedef Statistics::MahalanobisDistanceMembershipFunction< 00165 PixelType 00166 > MahalanobisDistanceFunctionType; 00167 00168 typedef typename MahalanobisDistanceFunctionType::Pointer MahalanobisDistanceFunctionPointer; 00169 MahalanobisDistanceFunctionPointer m_MahalanobisDistanceMembershipFunction; 00170 00171 }; 00172 00173 } // namespace itk 00174 00175 #ifndef ITK_MANUAL_INSTANTIATION 00176 #include "itkMahalanobisDistanceThresholdImageFunction.txx" 00177 #endif 00178 00179 #endif

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