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
188
189
190
191
192
|
/*
-----------------------------------------------------------------------
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_FANFLATBEAMLINEKERNELPROJECTOR
#define _INC_ASTRA_FANFLATBEAMLINEKERNELPROJECTOR
#include "FanFlatProjectionGeometry2D.h"
#include "FanFlatVecProjectionGeometry2D.h"
#include "Float32Data2D.h"
#include "Projector2D.h"
namespace astra
{
/** This class implements a two-dimensional projector based on a line based kernel
* with a fan flat projection geometry.
*
* \par XML Configuration
* \astra_xml_item{ProjectionGeometry, xml node, The geometry of the projection.}
* \astra_xml_item{VolumeGeometry, xml node, The geometry of the volume.}
*
* \par MATLAB example
* \astra_code{
* cfg = astra_struct('fanflat_line');\n
* cfg.ProjectionGeometry = proj_geom;\n
* cfg.VolumeGeometry = vol_geom;\n
* proj_id = astra_mex_projector('create'\, cfg);\n
* }
*/
class _AstraExport CFanFlatBeamLineKernelProjector2D : public CProjector2D {
protected:
/** Initial clearing. Only to be used by constructors.
*/
virtual void _clear();
/** Check the values of this object. If everything is ok, the object can be set to the initialized state.
* The following statements are then guaranteed to hold:
* - no NULL pointers
* - all sub-objects are initialized properly
* - blobvalues are ok
*/
virtual bool _check();
public:
// type of the projector, needed to register with CProjectorFactory
static std::string type;
/** Default constructor.
*/
CFanFlatBeamLineKernelProjector2D();
/** Constructor.
*
* @param _pProjectionGeometry Information class about the geometry of the projection. Will be HARDCOPIED.
* @param _pReconstructionGeometry Information class about the geometry of the reconstruction volume. Will be HARDCOPIED.
*/
CFanFlatBeamLineKernelProjector2D(CFanFlatProjectionGeometry2D* _pProjectionGeometry,
CVolumeGeometry2D* _pReconstructionGeometry);
/** Destructor, is virtual to show that we are aware subclass destructor are called.
*/
~CFanFlatBeamLineKernelProjector2D();
/** Initialize the projector with a config object.
*
* @param _cfg Configuration Object
* @return initialization successful?
*/
virtual bool initialize(const Config& _cfg);
/** Initialize the projector.
*
* @param _pProjectionGeometry Information class about the geometry of the projection. Will be HARDCOPIED.
* @param _pReconstructionGeometry Information class about the geometry of the reconstruction volume. Will be HARDCOPIED.
* @return initialization successful?
*/
virtual bool initialize(CFanFlatProjectionGeometry2D* _pProjectionGeometry,
CVolumeGeometry2D* _pReconstructionGeometry);
/** Clear this class.
*/
virtual void clear();
/** Returns the number of weights required for storage of all weights of one projection.
*
* @param _iProjectionIndex Index of the projection (zero-based).
* @return Size of buffer (given in SPixelWeight elements) needed to store weighted pixels.
*/
virtual int getProjectionWeightsCount(int _iProjectionIndex);
/** Compute the pixel weights for a single ray, from the source to a detector pixel.
*
* @param _iProjectionIndex Index of the projection
* @param _iDetectorIndex Index of the detector pixel
* @param _pWeightedPixels Pointer to a pre-allocated array, consisting of _iMaxPixelCount elements
* of type SPixelWeight. On return, this array contains a list of the index
* and weight for all pixels on the ray.
* @param _iMaxPixelCount Maximum number of pixels (and corresponding weights) that can be stored in _pWeightedPixels.
* This number MUST be greater than the total number of pixels on the ray.
* @param _iStoredPixelCount On return, this variable contains the total number of pixels on the
* ray (that have been stored in the list _pWeightedPixels).
*/
virtual void computeSingleRayWeights(int _iProjectionIndex,
int _iDetectorIndex,
SPixelWeight* _pWeightedPixels,
int _iMaxPixelCount,
int& _iStoredPixelCount);
/** Policy-based projection of all rays. This function will calculate each non-zero projection
* weight and use this value for a task provided by the policy object.
*
* @param _policy Policy object. Should contain prior, addWeight and posterior function.
*/
template <typename Policy>
void project(Policy& _policy);
/** Policy-based projection of all rays of a single projection. This function will calculate
* each non-zero projection weight and use this value for a task provided by the policy object.
*
* @param _iProjection Wwhich projection should be projected?
* @param _policy Policy object. Should contain prior, addWeight and posterior function.
*/
template <typename Policy>
void projectSingleProjection(int _iProjection, Policy& _policy);
/** Policy-based projection of a single ray. This function will calculate each non-zero
* projection weight and use this value for a task provided by the policy object.
*
* @param _iProjection Which projection should be projected?
* @param _iDetector Which detector should be projected?
* @param _policy Policy object. Should contain prior, addWeight and posterior function.
*/
template <typename Policy>
void projectSingleRay(int _iProjection, int _iDetector, Policy& _policy);
/** Return the type of this projector.
*
* @return identification type of this projector
*/
virtual std::string getType();
float32 angleBetweenVectors(float32 _fAX, float32 _fAY, float32 _fBX, float32 _fBY);
protected:
/** Internal policy-based projection of a range of angles and range.
* (_i*From is inclusive, _i*To exclusive) */
template <typename Policy>
void projectBlock_internal(int _iProjFrom, int _iProjTo,
int _iDetFrom, int _iDetTo, Policy& _policy);
};
//----------------------------------------------------------------------------------------
inline std::string CFanFlatBeamLineKernelProjector2D::getType()
{
return type;
}
} // namespace astra
#endif
|
