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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkNeighborhoodAccessorFunctor.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:42 $ |
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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 __itkNeighborhoodAccessorFunctor_h |
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#define __itkNeighborhoodAccessorFunctor_h |
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#include "itkImageBoundaryCondition.h" |
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#include "itkNeighborhood.h" |
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#include "itkImageBase.h" |
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namespace itk |
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{ |
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/** \class NeighborhoodAccessorFunctor |
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* \brief Provides accessor interfaces to Get pixels and is meant to be |
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* used on pointers contained within Neighborhoods. A typical user should |
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* not need to use this class directly. This class is used by the |
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* neighborhood iterators to get pixels from pixel pointers or assign |
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* a pixel to an address. |
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* |
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* |
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* \note |
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* This work is part of the National Alliance for Medical Image Computing |
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* (NAMIC), funded by the National Institutes of Health through the NIH Roadmap |
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* for Medical Research, Grant U54 EB005149. |
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***/ |
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template< class TImage > |
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class NeighborhoodAccessorFunctor |
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{ |
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public: |
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typedef TImage ImageType; |
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typedef typename ImageType::PixelType PixelType; |
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typedef typename ImageType::InternalPixelType InternalPixelType; |
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typedef unsigned int VectorLengthType; |
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typedef typename ImageType::OffsetType OffsetType; |
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typedef Neighborhood< InternalPixelType *, |
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::itk::GetImageDimension< TImage >::ImageDimension > NeighborhoodType; |
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typedef ImageBoundaryCondition< ImageType > const * |
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**************************ImageBoundaryConditionConstPointerType; |
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/** Set the pointer index to the start of the buffer. */ |
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inline void SetBegin( const InternalPixelType *) {} |
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/** Method to dereference a pixel pointer. This is used from the |
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* ConstNeighborhoodIterator as the equivalent operation to (*it). |
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* This method should be preferred over the former (*it) notation. |
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* The reason is that dereferencing a pointer to a location of |
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* VectorImage pixel involves a different operation that simply |
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* dereferencing the pointer. */ |
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inline PixelType Get( const InternalPixelType *pixelPointer ) const |
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{ |
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return (*pixelPointer); |
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} |
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/** Method to set the pixel value at a certain pixel pointer */ |
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inline void Set( InternalPixelType* &pixelPointer, const PixelType &p ) const |
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{ |
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*pixelPointer = p; |
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} |
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inline PixelType BoundaryCondition( |
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const OffsetType& point_index, |
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const OffsetType &boundary_offset, |
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const NeighborhoodType *data, |
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const ImageBoundaryConditionConstPointerType boundaryCondition) const |
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{ |
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return boundaryCondition->operator()(point_index, boundary_offset, data); |
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} |
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void SetVectorLength( VectorLengthType length ) {}; |
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VectorLengthType SetVectorLength() { return 0; }; |
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}; |
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} // end namespace itk |
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#endif |
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