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
184
185
186
187
188
189
190
|
/*=========================================================================
*
* 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.
*
*=========================================================================*/
#include "itkFastMarchingImageFilterBase.h"
#include "itkFastMarchingNumberOfElementsStoppingCriterion.h"
#include "itkBinaryThresholdImageFilter.h"
#include "itkImageRegionConstIterator.h"
int itkFastMarchingImageFilterRealWithNumberOfElementsTest(int , char* [] )
{
// create a fastmarching object
typedef float PixelType;
const unsigned Dimension = 2;
typedef itk::Image< PixelType, Dimension > FloatImageType;
typedef itk::FastMarchingNumberOfElementsStoppingCriterion< FloatImageType, FloatImageType >
CriterionType;
typedef itk::FastMarchingImageFilterBase< FloatImageType, FloatImageType >
FastMarchingType;
CriterionType::Pointer criterion = CriterionType::New();
criterion->SetTargetNumberOfElements( 100 );
FastMarchingType::Pointer marcher = FastMarchingType::New();
marcher->SetStoppingCriterion( criterion );
typedef FastMarchingType::NodePairType NodePairType;
// typedef FastMarchingType::NodeContainerType NodeContainerType;
typedef FastMarchingType::NodePairContainerType NodePairContainerType;
// setup alive points
NodePairContainerType::Pointer alive = NodePairContainerType::New();
NodePairType node_pair;
FloatImageType::OffsetType offset0 = {{28,35}};
itk::Index<2> index;
index.Fill(0);
node_pair.SetValue( 0.0 );
node_pair.SetNode( index + offset0 );
alive->push_back( node_pair );
node_pair.SetValue( 42.0 );
index.Fill( 200 );
node_pair.SetNode( index ); // this node is out of range
alive->push_back( node_pair );
marcher->SetAlivePoints( alive );
// setup trial points
NodePairContainerType::Pointer trial = NodePairContainerType::New();
node_pair.SetValue( 1.0 );
index.Fill(0);
index += offset0;
index[0] += 1;
node_pair.SetNode( index );
trial->push_back( node_pair );
index[0] -= 1;
index[1] += 1;
node_pair.SetNode( index );
trial->push_back( node_pair );
index[0] -= 1;
index[1] -= 1;
node_pair.SetNode( index );
trial->push_back( node_pair );
index[0] += 1;
index[1] -= 1;
node_pair.SetNode( index );
trial->push_back( node_pair );
node_pair.SetValue( 42.0 );
index.Fill( 300 ); // this node is out of ranage
node_pair.SetNode( index );
trial->push_back( node_pair );
marcher->SetTrialPoints( trial );
// specify the size of the output image
FloatImageType::SizeType size = {{64,64}};
marcher->SetOutputSize( size );
// setup a speed image of ones
FloatImageType::Pointer speedImage = FloatImageType::New();
FloatImageType::RegionType region;
region.SetSize( size );
speedImage->SetLargestPossibleRegion( region );
speedImage->SetBufferedRegion( region );
speedImage->Allocate();
itk::ImageRegionIterator<FloatImageType>
speedIter( speedImage, speedImage->GetBufferedRegion() );
while ( !speedIter.IsAtEnd() )
{
speedIter.Set( 1.0 );
++speedIter;
}
marcher->SetInput( speedImage );
try
{
// update the marcher
marcher->Update();
}
catch( itk::ExceptionObject & excep )
{
std::cerr << excep << std::endl;
return EXIT_FAILURE;
}
typedef char OutputPixelType;
typedef itk::Image< OutputPixelType, Dimension > OutputImageType;
typedef itk::BinaryThresholdImageFilter<FloatImageType, OutputImageType> ThresholdingFilterType;
ThresholdingFilterType::Pointer thresholder = ThresholdingFilterType::New();
thresholder->SetLowerThreshold( 0.0 );
thresholder->SetUpperThreshold( 100.0 );
thresholder->SetOutsideValue( 0 );
thresholder->SetInsideValue( 1 );
thresholder->SetInput( marcher->GetOutput() );
try
{
thresholder->Update();
}
catch( itk::ExceptionObject & excep )
{
std::cerr << "Exception caught !" << std::endl;
std::cerr << excep << std::endl;
return EXIT_FAILURE;
}
OutputImageType::Pointer output = thresholder->GetOutput();
typedef itk::ImageRegionConstIterator< OutputImageType > OutputIteratorType;
OutputIteratorType it( output, output->GetLargestPossibleRegion() );
it.GoToBegin();
unsigned int counter = 0;
while( !it.IsAtEnd() )
{
if( it.Get() == 1 )
{
++counter;
}
++it;
}
if( counter >= 100 )
{
return EXIT_SUCCESS;
}
else
{
return EXIT_FAILURE;
}
}
|
