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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkBinaryThresholdImageFunction.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:33 $ |
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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 _itkBinaryThresholdImageFunction_h |
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#define _itkBinaryThresholdImageFunction_h |
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#include "itkImageFunction.h" |
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namespace itk |
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{ |
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/** \class BinaryThresholdImageFunction |
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* \brief Returns true is the value of an image lies within a range of thresholds |
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This ImageFunction returns true (or false) if the pixel value lies |
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within (outside) a lower and upper threshold value. The threshold |
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range can be set with the ThresholdBelow, ThresholdBetween or |
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ThresholdAbove methods. The input image is set via method |
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SetInputImage(). |
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Methods Evaluate, EvaluateAtIndex and EvaluateAtContinuousIndex |
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respectively evaluate the function at an geometric point, image index |
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and continuous image index. |
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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 BinaryThresholdImageFunction : |
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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 BinaryThresholdImageFunction Self; |
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TDA |
typedef ImageFunction<TInputImage,bool,TCoordRep> Superclass; |
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TDA |
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(BinaryThresholdImageFunction, 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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/** 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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{ |
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IndexType index; |
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this->ConvertPointToNearestIndex( point, index ); |
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return ( this->EvaluateAtIndex( index ) ); |
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} |
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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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{ |
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******IndexType nindex; |
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******this->ConvertContinuousIndexToNearestIndex (index, nindex); |
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******return this->EvaluateAtIndex(nindex); |
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} |
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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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PixelType value = this->GetInputImage()->GetPixel(index); |
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return ( m_Lower <= value && value <= m_Upper); |
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} |
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/** Get the lower threshold value. */ |
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itkGetConstReferenceMacro(Lower,PixelType); |
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/** Get the upper threshold value. */ |
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itkGetConstReferenceMacro(Upper,PixelType); |
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/** Values greater than or equal to the value are inside. */ |
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void ThresholdAbove(PixelType thresh); |
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/** Values less than or equal to the value are inside. */ |
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void ThresholdBelow(PixelType thresh); |
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/** Values that lie between lower and upper inclusive are inside. */ |
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void ThresholdBetween(PixelType lower, PixelType upper); |
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protected: |
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BinaryThresholdImageFunction(); |
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~BinaryThresholdImageFunction(){}; |
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void PrintSelf(std::ostream& os, Indent indent) const; |
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private: |
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BinaryThresholdImageFunction( const Self& ); //purposely not implemented |
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void operator=( const Self& ); //purposely not implemented |
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PixelType m_Lower; |
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PixelType m_Upper; |
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}; |
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} // namespace itk |
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#ifndef ITK_MANUAL_INSTANTIATION |
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#include "itkBinaryThresholdImageFunction.txx" |
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#endif |
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#endif |
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