ITK  4.3.0
Insight Segmentation and Registration Toolkit
itkVectorImageNeighborhoodAccessorFunctor.h
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5  * Licensed under the Apache License, Version 2.0 (the "License");
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18 #ifndef __itkVectorImageNeighborhoodAccessorFunctor_h
19 #define __itkVectorImageNeighborhoodAccessorFunctor_h
20 
23 #include "itkImageBase.h"
24 
25 namespace itk
26 {
40 template< class TImage >
42 {
43 public:
44  typedef TImage ImageType;
45  typedef typename ImageType::PixelType PixelType;
46  typedef typename ImageType::InternalPixelType InternalPixelType;
47  typedef unsigned int VectorLengthType;
48  typedef typename ImageType::OffsetType OffsetType;
49 
51  TImage ::ImageDimension > NeighborhoodType;
52 
55 
57  m_VectorLength(length), m_OffsetMultiplier(length - 1), m_Begin(NULL) {}
60 
74  inline void SetBegin(const InternalPixelType *begin)
75  { this->m_Begin = const_cast< InternalPixelType * >( begin ); }
77 
85  inline PixelType Get(const InternalPixelType *pixelPointer) const
86  {
87  return PixelType(pixelPointer + ( pixelPointer - m_Begin ) * m_OffsetMultiplier, m_VectorLength);
88  }
89 
91  inline void Set(InternalPixelType * & pixelPointer, const PixelType & p) const
92  {
93  InternalPixelType *truePixelPointer =
94  pixelPointer + ( pixelPointer - m_Begin ) * m_OffsetMultiplier;
95 
96  for ( VectorLengthType i = 0; i < m_VectorLength; i++ )
97  {
98  truePixelPointer[i] = p[i];
99  }
100  }
101 
103  const OffsetType & point_index,
104  const OffsetType & boundary_offset,
105  const NeighborhoodType *data,
106  const ImageBoundaryConditionConstPointerType boundaryCondition) const
107  {
108  return boundaryCondition->operator()(point_index, boundary_offset, data, *this);
109  }
110 
114  {
115  m_VectorLength = length;
116  m_OffsetMultiplier = length - 1;
117  }
118 
122  {
123  return m_VectorLength;
124  }
125 
126 private:
128  VectorLengthType m_OffsetMultiplier; // m_OffsetMultiplier = m_VectorLength-1
129  // (precomputed for speedup).
130  InternalPixelType *m_Begin; // Begin of the buffer.
131 };
132 } // end namespace itk
133 #endif
134