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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkMahalanobisDistanceThresholdImageFunction.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:41 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef _itkMahalanobisDistanceThresholdImageFunction_h |
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#define _itkMahalanobisDistanceThresholdImageFunction_h |
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#include "itkImageFunction.h" |
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#include "itkMahalanobisDistanceMembershipFunction.h" |
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namespace itk |
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{ |
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/** \class MahalanobisDistanceThresholdImageFunction |
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* \brief Returns true if the pixel value of a vector image has a |
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* Mahalanobis distance below the value specified by the threshold. |
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* |
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* This ImageFunction returns true if the pixel value of a vector image has a |
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* Mahalanobis distance below the value specided by the threshold. The |
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* Mahalanobis distance is computed with the |
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* MahalanobisDistanceMembershipFunction class which has to be initialized with |
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* the mean an covariance to be used. This class is intended to be used only |
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* with images whose pixel type is a vector (array). |
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* |
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* The input image is set via method SetInputImage(). |
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* |
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* Methods Evaluate, EvaluateAtIndex and EvaluateAtContinuousIndex respectively |
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* evaluate the function at an geometric point, image index and continuous |
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* image index. |
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* |
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* \ingroup ImageFunctions |
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* |
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* */ |
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template <class TInputImage, class TCoordRep = float> |
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class ITK_EXPORT MahalanobisDistanceThresholdImageFunction : |
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**public ImageFunction<TInputImage,bool,TCoordRep> |
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{ |
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public: |
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/** Standard class typedefs. */ |
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typedef MahalanobisDistanceThresholdImageFunction Self; |
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typedef ImageFunction<TInputImage,bool,TCoordRep> Superclass; |
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typedef SmartPointer<Self> Pointer; |
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typedef SmartPointer<const Self> ConstPointer; |
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/** Run-time type information (and related methods). */ |
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itkTypeMacro(MahalanobisDistanceThresholdImageFunction, ImageFunction); |
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/** Method for creation through the object factory. */ |
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itkNewMacro(Self); |
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/** InputImageType typedef support. */ |
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typedef typename Superclass::InputImageType InputImageType; |
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/** Typedef to describe the type of pixel. */ |
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typedef typename TInputImage::PixelType PixelType; |
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/** Dimension underlying input image. */ |
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itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension); |
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/** Point typedef support. */ |
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typedef typename Superclass::PointType PointType; |
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/** Index typedef support. */ |
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typedef typename Superclass::IndexType IndexType; |
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/** ContinuousIndex typedef support. */ |
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typedef typename Superclass::ContinuousIndexType ContinuousIndexType; |
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/** Type used to represent the Covariance matrix of the vector population */ |
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typedef vnl_matrix<double> CovarianceMatrixType; |
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/** Type used to represent the Mean Vector of the vector population */ |
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typedef vnl_vector<double> MeanVectorType; |
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/** BinaryThreshold the image at a point position |
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* |
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* Returns true if the image intensity at the specified point position |
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* satisfies the threshold criteria. The point is assumed to lie within |
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* the image buffer. |
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* |
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* ImageFunction::IsInsideBuffer() can be used to check bounds before |
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* calling the method. */ |
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virtual bool Evaluate( const PointType& point ) const; |
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/** BinaryThreshold the image at a continuous index position |
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* |
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* Returns true if the image intensity at the specified point position |
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* satisfies the threshold criteria. The point is assumed to lie within |
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* the image buffer. |
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* |
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* ImageFunction::IsInsideBuffer() can be used to check bounds before |
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* calling the method. */ |
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virtual bool EvaluateAtContinuousIndex( |
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const ContinuousIndexType & index ) const; |
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/** BinaryThreshold the image at an index position. |
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* |
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* Returns true if the image intensity at the specified point position |
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* satisfies the threshold criteria. The point is assumed to lie within |
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* the image buffer. |
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* |
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* ImageFunction::IsInsideBuffer() can be used to check bounds before |
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* calling the method. */ |
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virtual bool EvaluateAtIndex( const IndexType & index ) const; |
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/** |
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* |
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* Returns the actual value of the MahalanobisDistance at that point. |
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* The point is assumed to lie within the image buffer. |
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* ImageFunction::IsInsideBuffer() can be used to check bounds before |
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* calling the method. */ |
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virtual double EvaluateDistance( const PointType& point ) const; |
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/** |
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* |
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* Returns the actual value of the MahalanobisDistance at that Index. |
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* The point is assumed to lie within the image buffer. |
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* ImageFunction::IsInsideBuffer() can be used to check bounds before |
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* calling the method. */ |
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virtual double EvaluateDistanceAtIndex( const IndexType & index ) const; |
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/** Get the lower threshold value. */ |
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itkGetConstReferenceMacro(Threshold,double); |
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itkSetMacro(Threshold,double); |
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/** Method to set mean */ |
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void SetMean(const MeanVectorType &mean); |
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const MeanVectorType & GetMean() const; |
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/** |
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* Method to set covariance matrix |
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* Also, this function calculates inverse covariance and pre factor of |
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* MahalanobisDistance Distribution to speed up GetProbability */ |
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void SetCovariance(const CovarianceMatrixType &cov); |
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const CovarianceMatrixType & GetCovariance() const; |
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protected: |
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MahalanobisDistanceThresholdImageFunction(); |
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~MahalanobisDistanceThresholdImageFunction(){}; |
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void PrintSelf(std::ostream& os, Indent indent) const; |
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private: |
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MahalanobisDistanceThresholdImageFunction( const Self& ); //purposely not implemented |
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void operator=( const Self& ); //purposely not implemented |
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double m_Threshold; |
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// This is intended only for Image of Vector pixel type. |
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typedef Statistics::MahalanobisDistanceMembershipFunction< |
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PixelType |
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**********************************************> MahalanobisDistanceFunctionType; |
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typedef typename MahalanobisDistanceFunctionType::Pointer MahalanobisDistanceFunctionPointer; |
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MahalanobisDistanceFunctionPointer m_MahalanobisDistanceMembershipFunction; |
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}; |
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} // namespace itk |
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#ifndef ITK_MANUAL_INSTANTIATION |
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#include "itkMahalanobisDistanceThresholdImageFunction.txx" |
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#endif |
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#endif |
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