/usr/include/InsightToolkit/Review/itkVectorCentralDifferenceImageFunction.txx is in libinsighttoolkit3-dev 3.20.1-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | /*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkVectorCentralDifferenceImageFunction.txx
Language: C++
Date: $Date$
Version: $Revision$
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 __itkVectorCentralDifferenceImageFunction_txx
#define __itkVectorCentralDifferenceImageFunction_txx
#include "itkVectorCentralDifferenceImageFunction.h"
namespace itk
{
/**
* Constructor
*/
template <class TInputImage, class TCoordRep>
VectorCentralDifferenceImageFunction<TInputImage,TCoordRep>
::VectorCentralDifferenceImageFunction()
{
#if defined(ITK_IMAGE_BEHAVES_AS_ORIENTED_IMAGE)
this->m_UseImageDirection = true;
#else
this->m_UseImageDirection = false;
#endif
}
/**
*
*/
template <class TInputImage, class TCoordRep>
void
VectorCentralDifferenceImageFunction<TInputImage,TCoordRep>
::PrintSelf(std::ostream& os, Indent indent) const
{
this->Superclass::PrintSelf(os,indent);
os << indent << "UseImageDirection = " << this->m_UseImageDirection << std::endl;
}
/**
*
*/
template <class TInputImage, class TCoordRep>
typename VectorCentralDifferenceImageFunction<TInputImage,TCoordRep>::OutputType
VectorCentralDifferenceImageFunction<TInputImage,TCoordRep>
::EvaluateAtIndex( const IndexType& index ) const
{
OutputType derivative;
derivative.Fill( 0.0 );
IndexType neighIndex = index;
const typename InputImageType::SizeType& size =
this->GetInputImage()->GetBufferedRegion().GetSize();
const typename InputImageType::IndexType& start =
this->GetInputImage()->GetBufferedRegion().GetIndex();
for ( unsigned int dim = 0; dim < TInputImage::ImageDimension; dim++ )
{
// bounds checking
if( index[dim] < static_cast<long>(start[dim]) + 1 ||
index[dim] > (start[dim] + static_cast<long>(size[dim]) - 2 ) )
{
for (unsigned int vdim=0; vdim<Dimension; ++vdim)
{
derivative(vdim,dim) = 0.0;
}
continue;
}
// compute derivative
const double deriv_weight = 0.5 / this->GetInputImage()->GetSpacing()[dim];
neighIndex[dim] += 1;
const InputPixelType & pixf = this->GetInputImage()->GetPixel( neighIndex );
for (unsigned int vdim=0; vdim<Dimension; ++vdim)
{
derivative(vdim,dim) = pixf[vdim];
}
neighIndex[dim] -= 2;
const InputPixelType & pixb = this->GetInputImage()->GetPixel( neighIndex );
for (unsigned int vdim=0; vdim<Dimension; ++vdim)
{
derivative(vdim,dim) -= pixb[vdim];
derivative(vdim,dim) *= deriv_weight;
}
neighIndex[dim] += 1;
}
#ifdef ITK_USE_ORIENTED_IMAGE_DIRECTION
if( this->m_UseImageDirection )
{
OutputType orientedderivative;
const typename InputImageType::DirectionType & direction
= this->GetInputImage()->GetDirection();
for ( unsigned int i = 0; i < TInputImage::ImageDimension; ++i )
{
std::vector<double> sums(Dimension,0.0);
for ( unsigned int j = 0; j < TInputImage::ImageDimension; ++j )
{
for (unsigned int vdim=0; vdim<Dimension; ++vdim)
{
sums[vdim] += direction[i][j] * derivative(vdim,j);
}
}
for (unsigned int vdim=0; vdim<Dimension; ++vdim)
{
orientedderivative(vdim,i) = static_cast<TCoordRep>( sums[vdim] );
}
}
return orientedderivative;
}
#endif
return ( derivative );
}
} // end namespace itk
#endif
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