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
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkAntiAliasBinaryImageFilterTest.cxx,v $
Language: C++
Date: $Date: 2007-08-20 12:47:11 $
Version: $Revision: 1.10 $
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 "itkAntiAliasBinaryImageFilter.h"
#include "itkImage.h"
//
// Uncomment the following lines if you are writing the output image.
//
//#include "itkRawImageIO.h"
//#include "itkImageFileWriter.h"
//
// This is a simple test of the AntiAliasBinaryImageFilter class. It creates a
// binary image of a sphere, then applies the filter. If you want to view the
// output, uncomment the lines which write the binary file. Output will be the
// floating point distance transform from the surface, which can be directly
// rendered using Marching Cubes or some other suitable algorithm. See
// documentation for AntiAliasBinaryImageFilter and
// SparseFieldLevelSetImageFilter for more information.
//
namespace AntiAliasBinaryImageFilterTestNamespace {
const int V_WIDTH = 64;
const int V_HEIGHT = 64;
const int V_DEPTH = 64;
float sphere(float x, float y, float z)
{
float dis;
dis = (x - (float)V_WIDTH/2.0)*(x - (float)V_WIDTH/2.0)
/((0.2f*V_WIDTH)*(0.2f*V_WIDTH)) +
(y - (float)V_HEIGHT/2.0)*(y - (float)V_HEIGHT/2.0)
/((0.2f*V_HEIGHT)*(0.2f*V_HEIGHT)) +
(z - (float)V_DEPTH/2.0)*(z - (float)V_DEPTH/2.0)
/((0.2f*V_DEPTH)*(0.2f*V_DEPTH));
return(1.0f-dis);
}
void evaluate_function(itk::Image<char, 3> *im,
float (*f)(float, float, float) )
{
itk::Image<char, 3>::IndexType idx;
for(int z = 0; z < V_DEPTH; ++z)
{
idx[2] = z;
for (int y = 0; y < V_HEIGHT; ++y)
{
idx[1] = y;
for (int x = 0; x < V_WIDTH; ++x)
{
idx[0] = x;
if ( f((float)x,(float)y,(float)z) >= 0.0 )
{ im->SetPixel(idx, 1 ); }
else
{ im->SetPixel(idx, 0 ); }
}
}
}
}
} // end namespace
int itkAntiAliasBinaryImageFilterTest(int , char * [] )
{
typedef char InputDataType;
typedef itk::Image<InputDataType, 3> BinaryImageType;
typedef itk::Image<float, 3> RealImageType;
itk::AntiAliasBinaryImageFilter<BinaryImageType, RealImageType>::Pointer
antialiaser = itk::AntiAliasBinaryImageFilter<BinaryImageType, RealImageType>::New();
// Create a binary image of a sphere.
BinaryImageType::Pointer image = BinaryImageType::New();
BinaryImageType::RegionType region;
BinaryImageType::RegionType::SizeType sz;
BinaryImageType::RegionType::IndexType idx;
for (unsigned k = 0; k < 3; k++)
{
sz[k] = 64;
idx[k] = 0;
}
region.SetSize(sz);
region.SetIndex(idx);
image->SetRegions(region);
image->Allocate();
AntiAliasBinaryImageFilterTestNamespace::evaluate_function(image,
AntiAliasBinaryImageFilterTestNamespace::sphere);
// Set up and apply the filter.
antialiaser->SetInput(image);
antialiaser->SetMaximumRMSError(0.02);
// For increased code coverage. Does nothing.
antialiaser->GetMaximumRMSError();
// Generally a good idea to set this value as a safeguard against infinte
// loops if the MaximumRMSError has been set too low.
antialiaser->SetNumberOfIterations(100);
antialiaser->Update();
std::cout << "Maximum RMS change value threshold was: 0.02 " << std::endl;
std::cout << "Last RMS change value was: " << antialiaser->GetRMSChange() << std::endl;
if (antialiaser->GetElapsedIterations() >= 100)
{
std::cout << "ERROR: Filter did not converge.";
return EXIT_FAILURE;
}
else
{
//
// Uncomment the following lines if you are writing the output image
//
// itk::RawImageIO<float, 3>::Pointer output_io
// = itk::RawImageIO<float, 3>::New();
//
// itk::ImageFileWriter<RealImageType>::Pointer writer
// = itk::ImageFileWriter<RealImageType>::New();
// output_io->SetFileTypeToBinary();
// output_io->SetFileDimensionality(3);
// output_io->SetByteOrderToLittleEndian();
// writer->SetInput(antialiaser->GetOutput());
// writer->SetFileName("spheretest.raw");
// writer->SetImageIO(output_io);
// writer->Write();
// Repeat just to make sure we reinitialize properly.
antialiaser->SetNumberOfIterations(200);
antialiaser->Update();
antialiaser->GetLowerBinaryValue();
antialiaser->GetUpperBinaryValue();
std::cout << "Maximum RMS change value threshold was: 0.02 " << std::endl;
std::cout << "Last RMS change value was: " << antialiaser->GetRMSChange() << std::endl;
}
return EXIT_SUCCESS;
}
|
