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
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkFastChamferDistanceImageFilterTest.cxx,v $
Language: C++
Date: $Date: 2006-06-07 02:58:00 $
Version: $Revision: 1.6 $
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.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include "itkFastChamferDistanceImageFilter.h"
#include "itkImage.h"
#include "itkImageRegionIteratorWithIndex.h"
//#include "itkImageFileReader.h"
//#include "itkImageFileWriter.h"
#include "itkCastImageFilter.h"
// simple signed distance function
namespace {
template <typename TPoint>
double
SimpleSignedDistance( const TPoint & p )
{
TPoint center;
center.Fill( 32 );
double radius = 10;
double accum = 0.0;
for( unsigned int j = 0; j < TPoint::PointDimension; j++ )
{
accum += vnl_math_sqr( p[j] - center[j] );
}
accum = vcl_sqrt( accum );
if (vnl_math_abs(accum - radius) > 1)
{
if((accum - radius) > 0)
return radius;
else
return -radius;
}
else
{
return ( accum - radius );
}
}
}
int itkFastChamferDistanceImageFilterTest(int, char* [] )
{
std::cout<< "Test ITK Chamfer Distance Image Filter" << std::endl;
std::cout << "Compute the distance map of a 64x64 image" << std::endl;
const unsigned int ImageDimension = 2;
typedef float PixelType;
typedef itk::Image<PixelType,ImageDimension> ImageType;
typedef itk::Point<double,ImageDimension> PointType;
ImageType::SizeType size = {{64,64}};
ImageType::IndexType index = {{0,0}};
ImageType::RegionType region;
region.SetSize( size );
region.SetIndex( index );
ImageType::Pointer inputImage = ImageType::New();
inputImage->SetLargestPossibleRegion( region );
inputImage->SetBufferedRegion( region );
inputImage->SetRequestedRegion( region );
inputImage->Allocate();
typedef itk::ImageRegionIteratorWithIndex<ImageType> IteratorType;
IteratorType it(inputImage,region);
// Set the image to 0
while( !it.IsAtEnd() )
{
PointType point;
inputImage->TransformIndexToPhysicalPoint( it.GetIndex(), point );
it.Set( SimpleSignedDistance( point ) );
++it;
}
/* Create Fast Chamfer Distance filter */
typedef itk::FastChamferDistanceImageFilter<
ImageType,ImageType> ChamferFilterType;
ChamferFilterType::Pointer filter = ChamferFilterType::New();
filter->SetInput(inputImage);
ImageType::Pointer outputImage = filter->GetOutput();
try
{
filter->Update();
}
catch( itk::ExceptionObject & err )
{
std::cout << "ExceptionObject caught !" << std::endl;
std::cout << err << std::endl;
return -1;
}
//Create NarrowBand
typedef ChamferFilterType::BandNodeType BandNodeType;
typedef ChamferFilterType::NarrowBandType NarrowBandType;
NarrowBandType::Pointer band = NarrowBandType::New();
band->SetTotalRadius(4);
band->SetInnerRadius(2);
filter->SetMaximumDistance(5);
std::cout<<"Band initial size: "<<band->Size()<<std::endl;
filter->SetNarrowBand(band.GetPointer());
filter->Update();
std::cout<<"Band size: "<<band->Size()<<std::endl;
//Loop through the band
typedef NarrowBandType::ConstIterator itNBType;
itNBType itNB = band->Begin();
itNBType itNBend = band->End();
// BandNodeType *tmp;
unsigned int innerpositive=0;
unsigned int innernegative=0;
unsigned int otherpoints=0;
for( ; itNB != itNBend ; itNB++)
{
if(itNB->m_NodeState == 3)
{
innerpositive++;
}
else if(itNB->m_NodeState == 2)
{
innernegative++;
}
else
{
otherpoints++;
}
}
std::cout<<"Inner positive points: "<<innerpositive
<<" Inner negative points: "<<innernegative
<<" Rest of points: "<<otherpoints<<std::endl;
//Exercising filter methods
float inweights[2];
inweights[0]=0.926;
inweights[1]=1.34;
const float *outweights;
filter->SetWeights(inweights);
outweights = filter->GetWeights();
std::cout << "outweights = " << outweights << std::endl;
/* For debugging write the result
typedef itk::ImageFileWriter< ImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("chamferoutput.mhd");
writer->SetInput(filter->GetOutput());
writer->Update();
*/
std::cout << "Test passed" << std::endl;
return EXIT_SUCCESS;
}
|
