summaryrefslogtreecommitdiffstats
path: root/src/SparseMatrixProjector2D.cpp
blob: be7e0698adeca86aa2aff9bfac65665a1ff31dbf (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
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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/*
-----------------------------------------------------------------------
Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp
           2014-2015, 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/>.

-----------------------------------------------------------------------
$Id$
*/

#include "astra/SparseMatrixProjector2D.h"

#include <cmath>

#include "astra/DataProjectorPolicies.h"

using namespace std;
using namespace astra;

#include "astra/SparseMatrixProjector2D.inl"

// type of the projector, needed to register with CProjectorFactory
std::string CSparseMatrixProjector2D::type = "sparse_matrix";

//----------------------------------------------------------------------------------------
// default constructor
CSparseMatrixProjector2D::CSparseMatrixProjector2D()
{
	_clear();
}

//----------------------------------------------------------------------------------------
// constructor
CSparseMatrixProjector2D::CSparseMatrixProjector2D(CSparseMatrixProjectionGeometry2D* _pProjectionGeometry,
                                                   CVolumeGeometry2D* _pReconstructionGeometry)

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

//----------------------------------------------------------------------------------------
// destructor
CSparseMatrixProjector2D::~CSparseMatrixProjector2D()
{
	clear();
}

//---------------------------------------------------------------------------------------
// Clear - Constructors
void CSparseMatrixProjector2D::_clear()
{
	CProjector2D::_clear();
	m_bIsInitialized = false;
}

//---------------------------------------------------------------------------------------
// Clear - Public
void CSparseMatrixProjector2D::clear()
{
	CProjector2D::clear();
	m_bIsInitialized = false;
}

//---------------------------------------------------------------------------------------
// Check
bool CSparseMatrixProjector2D::_check()
{
	// check base class
	ASTRA_CONFIG_CHECK(CProjector2D::_check(), "SparseMatrixProjector2D", "Error in Projector2D initialization");

	ASTRA_CONFIG_CHECK(m_pVolumeGeometry->isInitialized(), "SparseMatrixProjector2D", "Volume geometry not initialized");
	ASTRA_CONFIG_CHECK(m_pProjectionGeometry->isInitialized(), "SparseMatrixProjector2D", "Projection geometry not initialized");
	

	ASTRA_CONFIG_CHECK(dynamic_cast<CSparseMatrixProjectionGeometry2D*>(m_pProjectionGeometry), "SparseMatrixProjector2D", "Unsupported projection geometry");

	const CSparseMatrix* pMatrix = dynamic_cast<CSparseMatrixProjectionGeometry2D*>(m_pProjectionGeometry)->getMatrix();
	ASTRA_CONFIG_CHECK(pMatrix, "SparseMatrixProjector2D", "No matrix specified in projection geometry");

	ASTRA_CONFIG_CHECK(pMatrix->m_iWidth == (unsigned int)m_pVolumeGeometry->getGridTotCount(), "SparseMatrixProjector2D", "Matrix width doesn't match volume geometry");

	return true;
}


//---------------------------------------------------------------------------------------
// Initialize, use a Config object
bool CSparseMatrixProjector2D::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 CSparseMatrixProjector2D::initialize(CSparseMatrixProjectionGeometry2D* _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 CSparseMatrixProjector2D::getProjectionWeightsCount(int _iProjectionIndex)
{
	const CSparseMatrix* pMatrix = dynamic_cast<CSparseMatrixProjectionGeometry2D*>(m_pProjectionGeometry)->getMatrix();

	unsigned int iMax = 0;
	unsigned long lSize = m_pProjectionGeometry->getDetectorCount();
	lSize *= m_pProjectionGeometry->getProjectionAngleCount();
	for (unsigned long i = 0; i < lSize; ++i) {
		unsigned int iRowSize = pMatrix->getRowSize(i);
		if (iRowSize > iMax)
			iMax = pMatrix->getRowSize(i);
	}
	return iMax;
}

//----------------------------------------------------------------------------------------
// Single Ray Weights
void CSparseMatrixProjector2D::computeSingleRayWeights(int _iProjectionIndex, 
																  int _iDetectorIndex, 
																  SPixelWeight* _pWeightedPixels,
																  int _iMaxPixelCount, 
																  int& _iStoredPixelCount)
{
	// TODO: Move this default implementation to Projector2D?
	ASTRA_ASSERT(m_bIsInitialized);
	StorePixelWeightsPolicy p(_pWeightedPixels, _iMaxPixelCount);
	projectSingleRay(_iProjectionIndex, _iDetectorIndex, p);
	_iStoredPixelCount = p.getStoredPixelCount();
}

//----------------------------------------------------------------------------------------
// Splat a single point
std::vector<SDetector2D> CSparseMatrixProjector2D::projectPoint(int _iRow, int _iCol)
{
	unsigned int iVolumeIndex = _iCol * m_pVolumeGeometry->getGridRowCount() + _iRow;

	// NOTE: This is very slow currently because we don't have the
	// sparse matrix stored in an appropriate form for this function.
	std::vector<SDetector2D> ret;

	const CSparseMatrix* pMatrix = dynamic_cast<CSparseMatrixProjectionGeometry2D*>(m_pProjectionGeometry)->getMatrix();

	for (int iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle)
	{
		for (int iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector)
		{
			int iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
			const unsigned int* piColIndices;
			const float32* pfValues;
			unsigned int iSize;
    
			pMatrix->getRowData(iRayIndex, iSize, pfValues, piColIndices);

			for (unsigned int i = 0; i < iSize; ++i) {
				if (piColIndices[i] == iVolumeIndex) {
					SDetector2D s;
					s.m_iIndex = iRayIndex;
					s.m_iAngleIndex = iAngle;
					s.m_iDetectorIndex = iDetector;
					ret.push_back(s);
					break;
				} else if (piColIndices[i] > iVolumeIndex) {
					break;
				}
			}
		}
	}
	return ret;
}

//----------------------------------------------------------------------------------------