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/*
-----------------------------------------------------------------------
Copyright: 2010-2018, iMinds-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/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;
}
//----------------------------------------------------------------------------------------
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