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/*
-----------------------------------------------------------------------
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/>.
-----------------------------------------------------------------------
*/
#include "astra/ParallelBeamBlobKernelProjector2D.h"
#include <cmath>
#include <algorithm>
#include "astra/DataProjectorPolicies.h"
using namespace std;
using namespace astra;
#include "astra/ParallelBeamBlobKernelProjector2D.inl"
// type of the projector, needed to register with CProjectorFactory
std::string CParallelBeamBlobKernelProjector2D::type = "blob";
//----------------------------------------------------------------------------------------
// default constructor
CParallelBeamBlobKernelProjector2D::CParallelBeamBlobKernelProjector2D()
{
_clear();
}
//----------------------------------------------------------------------------------------
// constructor
CParallelBeamBlobKernelProjector2D::CParallelBeamBlobKernelProjector2D(CParallelProjectionGeometry2D* _pProjectionGeometry,
CVolumeGeometry2D* _pReconstructionGeometry,
float32 _fBlobSize,
float32 _fBlobSampleRate,
int _iBlobSampleCount,
float32* _pfBlobValues)
{
_clear();
initialize(_pProjectionGeometry, _pReconstructionGeometry, _fBlobSize, _fBlobSampleRate, _iBlobSampleCount, _pfBlobValues);
}
//----------------------------------------------------------------------------------------
// destructor
CParallelBeamBlobKernelProjector2D::~CParallelBeamBlobKernelProjector2D()
{
clear();
}
//---------------------------------------------------------------------------------------
// Clear - Constructors
void CParallelBeamBlobKernelProjector2D::_clear()
{
CProjector2D::_clear();
m_pfBlobValues = NULL;
m_iBlobSampleCount = 0;
m_fBlobSize = 0;
m_fBlobSampleRate = 0;
m_bIsInitialized = false;
}
//---------------------------------------------------------------------------------------
// Clear - Public
void CParallelBeamBlobKernelProjector2D::clear()
{
CProjector2D::clear();
if (m_pfBlobValues) {
delete[] m_pfBlobValues;
m_pfBlobValues = NULL;
}
m_iBlobSampleCount = 0;
m_fBlobSize = 0;
m_fBlobSampleRate = 0;
m_bIsInitialized = false;
}
//---------------------------------------------------------------------------------------
// Check
bool CParallelBeamBlobKernelProjector2D::_check()
{
// check base class
ASTRA_CONFIG_CHECK(CProjector2D::_check(), "ParallelBeamBlobKernelProjector2D", "Error in Projector2D initialization");
ASTRA_CONFIG_CHECK(dynamic_cast<CParallelProjectionGeometry2D*>(m_pProjectionGeometry) || dynamic_cast<CParallelVecProjectionGeometry2D*>(m_pProjectionGeometry), "ParallelBeamBlobKernelProjector2D", "Unsupported projection geometry");
ASTRA_CONFIG_CHECK(m_iBlobSampleCount > 0, "ParallelBeamBlobKernelProjector2D", "m_iBlobSampleCount should be strictly positive.");
ASTRA_CONFIG_CHECK(m_pfBlobValues, "ParallelBeamBlobKernelProjector2D", "Invalid Volume Geometry Object.");
// success
return true;
}
//---------------------------------------------------------------------------------------
// Initialize, use a Config object
bool CParallelBeamBlobKernelProjector2D::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;
}
// required: Kernel
XMLNode node = _cfg.self.getSingleNode("Kernel");
ASTRA_CONFIG_CHECK(node, "BlobProjector", "No Kernel tag specified.");
{
// Required: KernelSize
XMLNode node2 = node.getSingleNode("KernelSize");
ASTRA_CONFIG_CHECK(node2, "BlobProjector", "No Kernel/KernelSize tag specified.");
m_fBlobSize = node2.getContentNumerical();
// Required: SampleRate
node2 = node.getSingleNode("SampleRate");
ASTRA_CONFIG_CHECK(node2, "BlobProjector", "No Kernel/SampleRate tag specified.");
m_fBlobSampleRate = node2.getContentNumerical();
// Required: SampleCount
node2 = node.getSingleNode("SampleCount");
ASTRA_CONFIG_CHECK(node2, "BlobProjector", "No Kernel/SampleCount tag specified.");
m_iBlobSampleCount = node2.getContentInt();
// Required: KernelValues
node2 = node.getSingleNode("KernelValues");
ASTRA_CONFIG_CHECK(node2, "BlobProjector", "No Kernel/KernelValues tag specified.");
vector<float32> values = node2.getContentNumericalArray();
ASTRA_CONFIG_CHECK(values.size() == (unsigned int)m_iBlobSampleCount, "BlobProjector", "Number of specified values doesn't match SampleCount.");
m_pfBlobValues = new float32[m_iBlobSampleCount];
for (int i = 0; i < m_iBlobSampleCount; i++) {
m_pfBlobValues[i] = values[i];
}
}
// success
m_bIsInitialized = _check();
return m_bIsInitialized;
}
//----------------------------------------------------------------------------------------
// initialize
bool CParallelBeamBlobKernelProjector2D::initialize(CParallelProjectionGeometry2D* _pProjectionGeometry,
CVolumeGeometry2D* _pVolumeGeometry,
float32 _fBlobSize,
float32 _fBlobSampleRate,
int _iBlobSampleCount,
float32* _pfBlobValues)
{
// if already initialized, clear first
if (m_bIsInitialized) {
clear();
}
ASTRA_CONFIG_CHECK(_pProjectionGeometry, "BlobProjector", "Invalid ProjectionGeometry Object");
ASTRA_CONFIG_CHECK(m_pVolumeGeometry, "BlobProjector", "Invalid ProjectionGeometry Object");
m_pProjectionGeometry = _pProjectionGeometry->clone();
m_pVolumeGeometry = _pVolumeGeometry->clone();
m_fBlobSize = _fBlobSize;
m_fBlobSampleRate = _fBlobSampleRate;
m_iBlobSampleCount = _iBlobSampleCount;
m_pfBlobValues = new float32[_iBlobSampleCount];
for (int i = 0; i <_iBlobSampleCount; i++) {
m_pfBlobValues[i] = _pfBlobValues[i];
}
// success
m_bIsInitialized = _check();
return m_bIsInitialized;
}
//----------------------------------------------------------------------------------------
// Get maximum amount of weights on a single ray
int CParallelBeamBlobKernelProjector2D::getProjectionWeightsCount(int _iProjectionIndex)
{
int maxDim = max(m_pVolumeGeometry->getGridRowCount(), m_pVolumeGeometry->getGridColCount());
return (int)(maxDim * 2 * (m_fBlobSize+2) + 1);
}
//----------------------------------------------------------------------------------------
// Single Ray Weights
void CParallelBeamBlobKernelProjector2D::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();
}
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