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
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkFiniteCylinderSpatialFunctionTest.cxx,v $
Language: C++
Date: $Date: 2005-05-06 18:53:40 $
Version: $Revision: 1.3 $
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 "itkFiniteCylinderSpatialFunction.h"
int itkFiniteCylinderSpatialFunctionTest(int, char* [] )
{
std::cout << "itkFiniteCylinderSpatialFunction test start" << std::endl;
// Test will create a cylinder (3 - dimensional)
const unsigned int dimension = 3;
// Cylinder spatial function typedef.
typedef itk::FiniteCylinderSpatialFunction<dimension> TCylinderFunctionType;
typedef TCylinderFunctionType::InputType TCylinderFunctionVectorType;
//cylinder
TCylinderFunctionType::Pointer spatialFunc = TCylinderFunctionType::New();
double axis = 40.0;
spatialFunc->SetAxisLength(axis);
// Define function, which encapsulates cylinder.
int xExtent = 50;
int yExtent = 50;
int zExtent = 50;
TCylinderFunctionVectorType center;
center[0] = xExtent/2;
center[1] = yExtent/2;
center[2] = zExtent/2;
spatialFunc->SetCenter(center);
TCylinderFunctionVectorType orientation;
orientation[0] = .35;
orientation[1] = .35;
orientation[2] = .30;
spatialFunc->SetOrientation(orientation);
double radius = 5.0;
spatialFunc->SetRadius(radius);
// Evaluate all points in the spatial function and count the number of
// pixels that are inside the cylinder.
double testPosition[dimension]; // position of a pixel
bool functionValue; // Value of pixel at a given position
int interiorPixelCounter = 0; // Count pixels inside cylinder
for(int x = 0; x < xExtent; x++)
{
for(int y = 0; y < yExtent; y++)
{
for(int z =0; z < zExtent; z++)
{
testPosition[0] = x;
testPosition[1] = y;
testPosition[2] = z;
functionValue = spatialFunc->Evaluate(testPosition);
if(functionValue == 1)
interiorPixelCounter ++;
}
}
}
// Evaluate the center of the ellipsoid, which is inside the ellipsoid and
// should equal 1.
testPosition[0] = center[0];
testPosition[1] = center[1];
testPosition[2] = center[2];
functionValue = spatialFunc->Evaluate(testPosition);
// Volume of cylinder using V=pi*r^2*h
double volume = 3.14159*pow(radius,2)*axis;
// Percent difference in volume measurement and calculation
double volumeError = (fabs(volume - interiorPixelCounter)/volume)*100;
std::cout << spatialFunc;
// 5% error was randomly chosen as a successful ellipsoid fill.
// This should actually be some function of the image/ellipsoid size.
if(volumeError <= 7.0 && functionValue == 1)
{
// With testing settings, results should yield:
// calculated ellipsoid volume = 12566.4 pixels
// measured ellipsoid volume = 12428 pixels
// volume error = 1.10907%
// function value = 1
std::cout << "calculated cylinder volume = " << volume << std::endl
<< "measured cylinder volume = " << interiorPixelCounter << std::endl
<< "volume error = " << volumeError << "%" << std::endl
<< "function value = " << functionValue << std::endl
<< "center location = (" << spatialFunc->GetCenter()[0] << ", " << spatialFunc->GetCenter()[0]
<< ", " << spatialFunc->GetCenter()[2] << ")" << std::endl
<< "axis length = " << axis << std::endl
<< "itkFiniteCylinderSpatialFunction test ended successfully!" << std::endl;
return EXIT_SUCCESS;
}
//Default is to produce error code
std::cerr << "calculated ellipsoid volume = " << volume << std::endl
<< "measured ellipsoid volume = " << interiorPixelCounter << std::endl
<< "volume error = " << volumeError << "%" << std::endl
<< "function value = " << functionValue << std::endl
<< "center location = (" << spatialFunc->GetCenter()[0] << ", " << spatialFunc->GetCenter()[0]
<< ", " << spatialFunc->GetCenter()[2] << ")" << std::endl
<< "axis length = " << axis << std::endl
<< "itkFiniteCylinderSpatialFunction test failed :(" << std::endl;
return EXIT_FAILURE;
}
|
