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
|
/*
-----------------------------------------------------------------------
Copyright: 2010-2021, imec Vision Lab, University of Antwerp
2014-2021, CWI, Amsterdam
Contact: astra@astra-toolbox.com
Website: http://www.astra-toolbox.com/
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/>.
-----------------------------------------------------------------------
*/
#ifndef _INC_ASTRA_FANFLATVECPROJECTIONGEOMETRY2D
#define _INC_ASTRA_FANFLATVECPROJECTIONGEOMETRY2D
#include "ProjectionGeometry2D.h"
#include "GeometryUtil2D.h"
#include <cmath>
namespace astra
{
/**
* This class defines a 2D fan beam geometry.
*
* \par XML Configuration
* \astra_xml_item{DetectorCount, int, Number of detectors for each projection.}
* \astra_xml_item{Vectors, matrix defining the 2D position of source and detector.}
*
* \par MATLAB example
* \astra_code{
* proj_geom = astra_struct('fanflat_vec');\n
* proj_geom.DetectorCount = 512;\n
* proj_geom.Vectors = V;\n
* }
*
* \par Vectors
* Vectors is a matrix containing the actual geometry. Each row corresponds
* to a single projection, and consists of:
* ( srcX, srcY, srcZ, dX, dY uX, uY)
* src: the ray source
* d : the centre of the detector array
* u : the vector from detector 0 to detector 1
*/
class _AstraExport CFanFlatVecProjectionGeometry2D : public CProjectionGeometry2D
{
protected:
SFanProjection *m_pProjectionAngles;
public:
/** Default constructor. Sets all variables to zero. Note that this constructor leaves the object in an unusable state and must
* be followed by a call to init().
*/
CFanFlatVecProjectionGeometry2D();
/** Constructor.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorCount Number of detectors, i.e., the number of detector measurements for each projection angle.
* @param _pfProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array.
*/
CFanFlatVecProjectionGeometry2D(int _iProjectionAngleCount,
int _iDetectorCount,
const SFanProjection* _pfProjectionAngles);
/** Copy constructor.
*/
CFanFlatVecProjectionGeometry2D(const CFanFlatVecProjectionGeometry2D& _projGeom);
/** Assignment operator.
*/
CFanFlatVecProjectionGeometry2D& operator=(const CFanFlatVecProjectionGeometry2D& _other);
/** Destructor.
*/
virtual ~CFanFlatVecProjectionGeometry2D();
/** Initialize the geometry with a config object.
*
* @param _cfg Configuration Object
* @return initialization successful?
*/
virtual bool initialize(const Config& _cfg);
/** Initialization. This function MUST be called after using the default constructor and MAY be called to
* reset a previously initialized object.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorCount Number of detectors, i.e., the number of detector measurements for each projection angle.
* @param _pfProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array.
*/
bool initialize(int _iProjectionAngleCount,
int _iDetectorCount,
const SFanProjection* _pfProjectionAngles);
virtual bool _check();
/** Create a hard copy.
*/
virtual CProjectionGeometry2D* clone();
/** 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 == "fanflat_vec".
*/
virtual bool isOfType(const std::string& _sType);
/** 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(CProjectionGeometry2D*) const;
/** Get all settings in a Config object.
*
* @return Configuration Object.
*/
virtual Config* getConfiguration() const;
/** Get the value for t and theta, based upon the row and column index.
*
* @param _iRow row index
* @param _iColumn column index
* @param _fT output: value of t
* @param _fTheta output: value of theta, always lies within the [0,pi[ interval.
*/
virtual void getRayParams(int _iRow, int _iColumn, float32& _fT, float32& _fTheta) const;
/**
* Returns a vector describing the direction of a ray belonging to a certain detector
*
* @param _iProjectionIndex index of projection
* @param _iProjectionIndex index of detector
*
* @return a unit vector describing the direction
*/
virtual CVector3D getProjectionDirection(int _iProjectionIndex, int _iDetectorIndex);
const SFanProjection* getProjectionVectors() const { return m_pProjectionAngles; }
protected:
virtual bool initializeAngles(const Config& _cfg);
};
} // namespace astra
#endif /* _INC_ASTRA_FANFLATVECPROJECTIONGEOMETRY2D */
|
