summaryrefslogtreecommitdiffstats
path: root/src/FanFlatBeamStripKernelProjector2D.cpp
blob: c974b822bd39eb62c2bb881d3158b5902cf8de8d (plain)
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
/*
-----------------------------------------------------------------------
Copyright: 2010-2018, imec Vision Lab, University of Antwerp
           2014-2018, 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/>.

-----------------------------------------------------------------------
*/

#include "astra/FanFlatBeamStripKernelProjector2D.h"

#include <cmath>
#include <algorithm>

#include "astra/DataProjectorPolicies.h"

using namespace std;
using namespace astra;

#include "astra/FanFlatBeamStripKernelProjector2D.inl"

// type of the projector, needed to register with CProjectorFactory
std::string CFanFlatBeamStripKernelProjector2D::type = "strip_fanflat";

//----------------------------------------------------------------------------------------
// default constructor
CFanFlatBeamStripKernelProjector2D::CFanFlatBeamStripKernelProjector2D()
{
	_clear();
}

//----------------------------------------------------------------------------------------
// constructor
CFanFlatBeamStripKernelProjector2D::CFanFlatBeamStripKernelProjector2D(CFanFlatProjectionGeometry2D* _pProjectionGeometry,
																	   CVolumeGeometry2D* _pReconstructionGeometry)

{
	_clear();
	initialize(_pProjectionGeometry, _pReconstructionGeometry);
}

//----------------------------------------------------------------------------------------
// destructor
CFanFlatBeamStripKernelProjector2D::~CFanFlatBeamStripKernelProjector2D()
{
	clear();
}

//---------------------------------------------------------------------------------------
// Clear - Constructors
void CFanFlatBeamStripKernelProjector2D::_clear()
{
	CProjector2D::_clear();
	m_bIsInitialized = false;
}

//---------------------------------------------------------------------------------------
// Clear - Public
void CFanFlatBeamStripKernelProjector2D::clear()
{
	CProjector2D::clear();
	m_bIsInitialized = false;
}

//---------------------------------------------------------------------------------------
// Check
bool CFanFlatBeamStripKernelProjector2D::_check()
{
	// check base class
	ASTRA_CONFIG_CHECK(CProjector2D::_check(), "FanFlatBeamStripKernelProjector2D", "Error in Projector2D initialization");

	ASTRA_CONFIG_CHECK(dynamic_cast<CFanFlatProjectionGeometry2D*>(m_pProjectionGeometry), "FanFlatBeamLineKernelProjector2D", "Unsupported projection geometry");

	ASTRA_CONFIG_CHECK(abs(m_pVolumeGeometry->getPixelLengthX() / m_pVolumeGeometry->getPixelLengthY()) - 1 < eps, "FanFlatBeamStripKernelProjector2D", "Pixel height must equal pixel width.");
	
	// success
	return true;
}

//---------------------------------------------------------------------------------------
// Initialize, use a Config object
bool CFanFlatBeamStripKernelProjector2D::initialize(const Config& _cfg)
{
	ASTRA_ASSERT(_cfg.self);

	// if already initialized, clear first
	if (m_bIsInitialized) {
		clear();
	}

	// initialization of parent class
	if (!CProjector2D::initialize(_cfg)) {
		return false;
	}

	// success
	m_bIsInitialized = _check();
	return m_bIsInitialized;
}

//---------------------------------------------------------------------------------------
// Initialize
bool CFanFlatBeamStripKernelProjector2D::initialize(CFanFlatProjectionGeometry2D* _pProjectionGeometry, 
													 CVolumeGeometry2D* _pVolumeGeometry)
{
	// if already initialized, clear first
	if (m_bIsInitialized) {
		clear();
	}

	// hardcopy geometries
	m_pProjectionGeometry = _pProjectionGeometry->clone();
	m_pVolumeGeometry = _pVolumeGeometry->clone();

	// success
	m_bIsInitialized = _check();
	return m_bIsInitialized;
}


//----------------------------------------------------------------------------------------
// Get maximum amount of weights on a single ray
int CFanFlatBeamStripKernelProjector2D::getProjectionWeightsCount(int _iProjectionIndex)
{
	int maxDim = max(m_pVolumeGeometry->getGridRowCount(), m_pVolumeGeometry->getGridColCount());
	return maxDim * 10 + 1;
}

//----------------------------------------------------------------------------------------
// Single Ray Weights
void CFanFlatBeamStripKernelProjector2D::computeSingleRayWeights(int _iProjectionIndex, 
																  int _iDetectorIndex, 
																  SPixelWeight* _pWeightedPixels,
																  int _iMaxPixelCount, 
																  int& _iStoredPixelCount)
{
	ASTRA_ASSERT(m_bIsInitialized);
	StorePixelWeightsPolicy p(_pWeightedPixels, _iMaxPixelCount);
	projectSingleRay(_iProjectionIndex, _iDetectorIndex, p);
	_iStoredPixelCount = p.getStoredPixelCount();
}