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
|
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkVectorMeanImageFunction_hxx
#define itkVectorMeanImageFunction_hxx
#include "itkVectorMeanImageFunction.h"
#include "itkConstNeighborhoodIterator.h"
namespace itk
{
/**
* Constructor
*/
template< typename TInputImage, typename TCoordRep >
VectorMeanImageFunction< TInputImage, TCoordRep >
::VectorMeanImageFunction()
{
m_NeighborhoodRadius = 1;
}
/**
*
*/
template< typename TInputImage, typename TCoordRep >
void
VectorMeanImageFunction< TInputImage, TCoordRep >
::PrintSelf(std::ostream & os, Indent indent) const
{
this->Superclass::PrintSelf(os, indent);
os << indent << "NeighborhoodRadius: " << m_NeighborhoodRadius << std::endl;
}
/**
*
*/
template< typename TInputImage, typename TCoordRep >
typename VectorMeanImageFunction< TInputImage, TCoordRep >
::RealType
VectorMeanImageFunction< TInputImage, TCoordRep >
::EvaluateAtIndex(const IndexType & index) const
{
typedef typename TInputImage::PixelType PixelType;
typedef typename PixelType::ValueType PixelComponentType;
typedef typename NumericTraits< PixelComponentType >::RealType PixelComponentRealType;
if ( !this->GetInputImage() || !this->IsInsideBuffer(index) )
{
RealType sum;
sum.Fill( NumericTraits< PixelComponentRealType >::max() );
return sum;
}
// Create an N-d neighborhood kernel, using a zeroflux boundary condition
typename InputImageType::SizeType kernelSize;
kernelSize.Fill(m_NeighborhoodRadius);
ConstNeighborhoodIterator< InputImageType >
it( kernelSize, this->GetInputImage(), this->GetInputImage()->GetBufferedRegion() );
// Set the iterator at the desired location
it.SetLocation(index);
RealType sum;
// Walk the neighborhood
const unsigned int size = it.Size();
for ( unsigned int i = 0; i < size; ++i )
{
PixelType p = it.GetPixel(i);
const unsigned int VectorDimension = NumericTraits<PixelType>::GetLength( p );
if ( i == 0 )
{
sum = static_cast< RealType >( NumericTraits<PixelType>::ZeroValue( p ) );
}
for ( unsigned int dim = 0; dim < VectorDimension; dim++ )
{
sum[dim] += static_cast< PixelComponentRealType >( p[dim] );
}
}
const unsigned int VectorDimension = NumericTraits<RealType>::GetLength( sum );
for ( unsigned int dim = 0; dim < VectorDimension; dim++ )
{
sum[dim] /= double( it.Size() );
}
return ( sum );
}
} // end namespace itk
#endif
|
