forked from InsightSoftwareConsortium/ITK
-
Notifications
You must be signed in to change notification settings - Fork 0
/
itkLevelSetVelocityNeighborhoodExtractor.txx
183 lines (149 loc) · 4.46 KB
/
itkLevelSetVelocityNeighborhoodExtractor.txx
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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkLevelSetVelocityNeighborhoodExtractor.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 _itkLevelSetVelocityNeighborhoodExtractor_txx
#define _itkLevelSetVelocityNeighborhoodExtractor_txx
#include "itkLevelSetVelocityNeighborhoodExtractor.h"
#include "vnl/vnl_math.h"
namespace itk
{
/*
*
*/
template <class TLevelSet, class TAuxValue,
unsigned int VAuxDimension>
LevelSetVelocityNeighborhoodExtractor<TLevelSet,TAuxValue,VAuxDimension>
::LevelSetVelocityNeighborhoodExtractor( )
{
m_AuxInsideValues = 0;
m_AuxOutsideValues = 0;
for (unsigned int i=0; i < VAuxDimension; ++i)
{
m_AuxImage[i] = 0;
}
}
/*
*
*/
template <class TLevelSet, class TAuxValue,
unsigned int VAuxDimension>
void
LevelSetVelocityNeighborhoodExtractor<TLevelSet,TAuxValue,VAuxDimension>
::PrintSelf(std::ostream &os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Input aux image: [";
unsigned int j;
for( j = 0; j+1 < VAuxDimension; j++ )
{
os << m_AuxImage[j].GetPointer() << ", ";
}
os << m_AuxImage[j].GetPointer() << "]" << std::endl;
os << indent << "AuxInsideValues: " <<
m_AuxInsideValues.GetPointer() << std::endl;
os << indent << "AuxOutsideValues: " <<
m_AuxOutsideValues.GetPointer() << std::endl;
}
/*
*
*/
template <class TLevelSet, class TAuxValue,
unsigned int VAuxDimension>
void
LevelSetVelocityNeighborhoodExtractor<TLevelSet,TAuxValue,VAuxDimension>
::Initialize()
{
this->Superclass::Initialize();
// create new empty auxiliary variable containers
m_AuxInsideValues = AuxValueContainer::New();
m_AuxOutsideValues = AuxValueContainer::New();
}
/*
*
*/
template <class TLevelSet, class TAuxValue,
unsigned int VAuxDimension>
double
LevelSetVelocityNeighborhoodExtractor<TLevelSet,TAuxValue,VAuxDimension>
::CalculateDistance(
Index& index)
{
double distance = this->Superclass::CalculateDistance( index );
if( distance >= this->GetLargeValue() )
{
return distance;
}
double centerValue[VAuxDimension];
AuxValueType auxPixel;
AuxValueVectorType auxVector;
for( unsigned int k = 0; k < VAuxDimension; k++ )
{
auxPixel = m_AuxImage[k]->GetPixel( index );
centerValue[k] = (double) auxPixel;
}
// if distance is zero, insert point in inside container
if( this->GetLastPointIsInside() )
{
for( unsigned int k = 0; k < VAuxDimension; k++ )
{
auxVector[k] = centerValue[k];
}
m_AuxInsideValues->InsertElement( m_AuxInsideValues->Size(), auxVector );
return distance;
}
double denom = 0.0;
double numer[VAuxDimension];
typename Superclass::NodeType neighNode;
for( unsigned int k = 0; k < VAuxDimension; k++ )
{
numer[k] = 0.0;
}
// The extend velcoity value is a weighted value of
// the speed values at point used in the computation
// of the distance by the superclass.
//
// The weights is proportional to one over the square
// of distance along the grid line to the zero set
// crossing.
for( unsigned int j = 0; j < SetDimension; j++ )
{
neighNode = this->GetNodeUsedInCalculation(j);
if( neighNode.GetValue() >= this->GetLargeValue() )
{
break;
}
denom += 1.0 / vnl_math_sqr( (double)neighNode.GetValue() );
for( unsigned int k = 0; k < VAuxDimension; k++ )
{
auxPixel = m_AuxImage[k]->GetPixel( neighNode.GetIndex() );
numer[k] += (double) ( auxPixel ) / vnl_math_sqr( (double)neighNode.GetValue() );
}
}
for( unsigned int k = 0; k < VAuxDimension; k++ )
{
numer[k] /= denom;
auxVector[k] = numer[k];
}
if( this->GetLastPointIsInside() )
{
m_AuxInsideValues->InsertElement(
m_AuxInsideValues->Size(), auxVector );
}
else
{
m_AuxOutsideValues->InsertElement(
m_AuxOutsideValues->Size(), auxVector );
}
return distance;
}
} // namespace itk
#endif