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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkNeighborhoodAccessorFunctor.h,v $
Language: C++
Date: $Date: 2005-09-07 14:46:28 $
Version: $Revision: 1.1 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkNeighborhoodAccessorFunctor_h
#define __itkNeighborhoodAccessorFunctor_h
#include "itkImageBoundaryCondition.h"
#include "itkNeighborhood.h"
#include "itkImageBase.h"
namespace itk
{
/** \class NeighborhoodAccessorFunctor
* \brief Provides accessor interfaces to Get pixels and is meant to be
* used on pointers contained within Neighborhoods. A typical user should
* not need to use this class directly. This class is used by the
* neighborhood iterators to get pixels from pixel pointers or assign
* a pixel to an address.
*
*
* \note
* This work is part of the National Alliance for Medical Image Computing
* (NAMIC), funded by the National Institutes of Health through the NIH Roadmap
* for Medical Research, Grant U54 EB005149.
*/
template< class TImage >
class NeighborhoodAccessorFunctor
{
public:
typedef TImage ImageType;
typedef typename ImageType::PixelType PixelType;
typedef typename ImageType::InternalPixelType InternalPixelType;
typedef unsigned int VectorLengthType;
typedef typename ImageType::OffsetType OffsetType;
typedef Neighborhood< InternalPixelType *,
::itk::GetImageDimension< TImage >::ImageDimension > NeighborhoodType;
typedef ImageBoundaryCondition< ImageType > const *
ImageBoundaryConditionConstPointerType;
/** Set the pointer index to the start of the buffer. */
inline void SetBegin( const InternalPixelType *) {}
/** Method to dereference a pixel pointer. This is used from the
* ConstNeighborhoodIterator as the equivalent operation to (*it).
* This method should be preferred over the former (*it) notation.
* The reason is that dereferencing a pointer to a location of
* VectorImage pixel involves a different operation that simply
* dereferencing the pointer. */
inline PixelType Get( const InternalPixelType *pixelPointer ) const
{
return (*pixelPointer);
}
/** Method to set the pixel value at a certain pixel pointer */
inline void Set( InternalPixelType* &pixelPointer, const PixelType &p ) const
{
*pixelPointer = p;
}
inline PixelType BoundaryCondition(
const OffsetType& point_index,
const OffsetType &boundary_offset,
const NeighborhoodType *data,
const ImageBoundaryConditionConstPointerType boundaryCondition) const
{
return boundaryCondition->operator()(point_index, boundary_offset, data);
}
void SetVectorLength( VectorLengthType length ) {};
VectorLengthType SetVectorLength() { return 0; };
};
} // end namespace itk
#endif
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