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
|
/*
-----------------------------------------------------------------------
Copyright: 2010-2014, iMinds-Vision Lab, University of Antwerp
2014, CWI, Amsterdam
Contact: astra@uantwerpen.be
Website: http://sf.net/projects/astra-toolbox
This file is part of the ASTRA Toolbox.
The ASTRA Toolbox is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
The ASTRA Toolbox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
-----------------------------------------------------------------------
$Id$
*/
#ifndef _INC_ASTRA_PARALLELPROJECTIONGEOMETRY3D
#define _INC_ASTRA_PARALLELPROJECTIONGEOMETRY3D
#include "ProjectionGeometry3D.h"
#include "ParallelProjectionGeometry2D.h"
namespace astra
{
/**
* This class defines a 3D parallel beam projection geometry.
*
* \par XML Configuration
* \astra_xml_item{DetectorRowCount, int, Number of detectors for each projection.}
* \astra_xml_item{DetectorColCount, int, Number of detectors for each projection.}
* \astra_xml_item{DetectorWidth, float, Width of each detector.}
* \astra_xml_item{DetectorHeight, float, Width of each detector.}
* \astra_xml_item{ProjectionAngles, vector of float, projection angles in radians.}
*
* \par MATLAB example
* \astra_code{
* proj_geom = astra_struct('parallel');\n
* proj_geom.DetectorRowCount = 512;\n
* proj_geom.DetectorColCount = 512;\n
* proj_geom.DetectorWidth = 1.0;\n
* proj_geom.DetectorHeight = 1.0;\n
* proj_geom.ProjectionAngles = linspace(0,pi,100);\n
* }
*/
class _AstraExport CParallelProjectionGeometry3D : public CProjectionGeometry3D
{
protected:
public:
/** Default constructor. Sets all numeric member variables to 0 and all pointer member variables to NULL.
*
* If an object is constructed using this default constructor, it must always be followed by a call
* to one of the initialize() methods before the object can be used. Any use before calling initialize()
* is not allowed, except calling the member function isInitialized().
*/
CParallelProjectionGeometry3D();
/** Constructor. Create an instance of the CParallelProjectionGeometry3D class.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorRowCount Number of rows of detectors.
* @param _iDetectorColCount Number of columns detectors.
* @param _fDetectorWidth Width of a detector cell, in unit lengths. All detector cells are assumed to have equal width.
* @param _fDetectorHeight Height of a detector cell, in unit lengths. All detector cells are assumed to have equal width.
* @param _pfProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array. All angles
* are represented in radians and lie in the [0,2pi[ interval.
*/
CParallelProjectionGeometry3D(int _iProjectionAngleCount,
int _iDetectorRowCount,
int _iDetectorColCount,
float32 _fDetectorWidth,
float32 _fDetectorHeight,
const float32* _pfProjectionAngles);
/** Copy constructor.
*/
CParallelProjectionGeometry3D(const CParallelProjectionGeometry3D& _projGeom);
/** Destructor.
*/
~CParallelProjectionGeometry3D();
/** Initialize the geometry with a config object.
*
* @param _cfg Configuration Object
* @return initialization successful?
*/
virtual bool initialize(const Config& _cfg);
/** Initialize the geometry. If the object has been initialized before, the object is reinitialized
* and memory is freed and reallocated if necessary.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorRowCount Number of rows of detectors.
* @param _iDetectorColCount Number of columns detectors.
* @param _fDetectorWidth Width of a detector cell, in unit lengths. All detector cells are assumed to have equal width.
* @param _fDetectorHeight Height of a detector cell, in unit lengths. All detector cells are assumed to have equal height.
* @param _pfProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array. All angles
* are represented in radians and lie in the [0,2pi[ interval.
*/
bool initialize(int _iProjectionAngleCount,
int _iDetectorRowCount,
int _iDetectorColCount,
float32 _fDetectorWidth,
float32 _fDetectorHeight,
const float32* _pfProjectionAngles);
/** Create a hard copy.
*/
virtual CProjectionGeometry3D* clone() const;
/** Return true if this geometry instance is the same as the one specified.
*
* @return true if this geometry instance is the same as the one specified.
*/
virtual bool isEqual(const CProjectionGeometry3D*) const;
/** Returns true if the type of geometry defined in this class is the one specified in _sType.
*
* @param _sType geometry type to compare to.
* @return true if _sType == "parallel".
*/
virtual bool isOfType(const std::string& _sType) const;
/** Turn this object into an XML object.
*
* @param _sNode The XML object to fill.
*/
virtual void toXML(XMLNode* _sNode) const;
/**
* Returns a vector giving the projection direction for a projection and detector index
*/
virtual CVector3D getProjectionDirection(int _iProjectionIndex, int _iDetectorIndex) const;
/**
* Creates (= allocates) a 2D projection geometry used when projecting one slice using a 2D projector
*
* @return the 2D geometry, this pointer needs to be delete-ed after use.
*/
CParallelProjectionGeometry2D * createProjectionGeometry2D() const;
};
} // namespace astra
#endif /* _INC_ASTRA_PARALLELPROJECTIONGEOMETRY3D */
|
