Update version to 1.3

1 files changed, 224 insertions, 0 deletions

diff --git a/src/ParallelBeamStripKernelProjector2D.cpp b/src/ParallelBeamStripKernelProjector2D.cpp
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+++ b/src/ParallelBeamStripKernelProjector2D.cpp
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+/*
+-----------------------------------------------------------------------
+Copyright 2012 iMinds-Vision Lab, University of Antwerp
+
+Contact: astra@ua.ac.be
+Website: http://astra.ua.ac.be
+
+
+This file is part of the
+All Scale Tomographic Reconstruction Antwerp Toolbox ("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/ParallelBeamStripKernelProjector2D.h"
+
+#include <cmath>
+#include <boost/lexical_cast.hpp>
+
+#include "astra/DataProjectorPolicies.h"
+
+using namespace std;
+using namespace astra;
+
+#include "astra/ParallelBeamStripKernelProjector2D.inl"
+
+// type of the projector, needed to register with CProjectorFactory
+std::string CParallelBeamStripKernelProjector2D::type = "strip";
+
+//----------------------------------------------------------------------------------------
+// default constructor
+CParallelBeamStripKernelProjector2D::CParallelBeamStripKernelProjector2D()
+{
+	_clear();
+}
+
+//----------------------------------------------------------------------------------------
+// constructor
+CParallelBeamStripKernelProjector2D::CParallelBeamStripKernelProjector2D(CParallelProjectionGeometry2D* _pProjectionGeometry,
+																	     CVolumeGeometry2D* _pReconstructionGeometry)
+
+{
+	_clear();
+	initialize(_pProjectionGeometry, _pReconstructionGeometry);
+}
+
+//----------------------------------------------------------------------------------------
+// destructor
+CParallelBeamStripKernelProjector2D::~CParallelBeamStripKernelProjector2D()
+{
+	clear();
+}
+
+//---------------------------------------------------------------------------------------
+// Clear - Constructors
+void CParallelBeamStripKernelProjector2D::_clear()
+{
+	CProjector2D::_clear();
+	m_bIsInitialized = false;
+}
+
+//---------------------------------------------------------------------------------------
+// Clear - Public
+void CParallelBeamStripKernelProjector2D::clear()
+{
+	CProjector2D::clear();
+	m_bIsInitialized = false;
+}
+
+//---------------------------------------------------------------------------------------
+// Check
+bool CParallelBeamStripKernelProjector2D::_check()
+{
+	// check base class
+	ASTRA_CONFIG_CHECK(CProjector2D::_check(), "ParallelBeamStripKernelProjector2D", "Error in Projector2D initialization");
+
+	ASTRA_CONFIG_CHECK(dynamic_cast<CParallelProjectionGeometry2D*>(m_pProjectionGeometry), "ParallelBeamStripKernelProjector2D", "Unsupported projection geometry");
+
+	ASTRA_CONFIG_CHECK(m_pVolumeGeometry->getPixelLengthX() == m_pVolumeGeometry->getPixelLengthY(), "ParallelBeamStripKernelProjector2D", "Pixel height must equal pixel width.");
+	
+	// success
+	return true;
+}
+
+//---------------------------------------------------------------------------------------
+// Initialize, use a Config object
+bool CParallelBeamStripKernelProjector2D::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 CParallelBeamStripKernelProjector2D::initialize(CParallelProjectionGeometry2D* _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 CParallelBeamStripKernelProjector2D::getProjectionWeightsCount(int _iProjectionIndex)
+{
+	int maxDim = max(m_pVolumeGeometry->getGridRowCount(), m_pVolumeGeometry->getGridColCount());
+	int scale = m_pProjectionGeometry->getDetectorWidth() / min(m_pVolumeGeometry->getPixelLengthX(), m_pVolumeGeometry->getPixelLengthY());
+	return maxDim * scale * 10 + 1;
+}
+
+//----------------------------------------------------------------------------------------
+// Single Ray Weights
+void CParallelBeamStripKernelProjector2D::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();
+}
+
+//----------------------------------------------------------------------------------------
+// Splat a single point
+std::vector<SDetector2D> CParallelBeamStripKernelProjector2D::projectPoint(int _iRow, int _iCol)
+{
+	float32 xUL = m_pVolumeGeometry->pixelColToCenterX(_iCol) - m_pVolumeGeometry->getPixelLengthX() * 0.5f;
+	float32 yUL = m_pVolumeGeometry->pixelRowToCenterY(_iRow) - m_pVolumeGeometry->getPixelLengthY() * 0.5f;
+	float32 xUR = m_pVolumeGeometry->pixelColToCenterX(_iCol) + m_pVolumeGeometry->getPixelLengthX() * 0.5f;
+	float32 yUR = m_pVolumeGeometry->pixelRowToCenterY(_iRow) - m_pVolumeGeometry->getPixelLengthY() * 0.5f;
+	float32 xLL = m_pVolumeGeometry->pixelColToCenterX(_iCol) - m_pVolumeGeometry->getPixelLengthX() * 0.5f;
+	float32 yLL = m_pVolumeGeometry->pixelRowToCenterY(_iRow) + m_pVolumeGeometry->getPixelLengthY() * 0.5f;
+	float32 xLR = m_pVolumeGeometry->pixelColToCenterX(_iCol) + m_pVolumeGeometry->getPixelLengthX() * 0.5f;
+	float32 yLR = m_pVolumeGeometry->pixelRowToCenterY(_iRow) + m_pVolumeGeometry->getPixelLengthY() * 0.5f;
+
+	std::vector<SDetector2D> res;
+	// loop projectors and detectors
+	for (int iProjection = 0; iProjection < m_pProjectionGeometry->getProjectionAngleCount(); ++iProjection) {
+
+		// get projection angle
+		float32 theta = m_pProjectionGeometry->getProjectionAngle(iProjection);
+		if (theta >= 7*PIdiv4) theta -= 2*PI;
+		bool inverse = false;
+		if (theta >= 3*PIdiv4) {
+			theta -= PI;
+			inverse = true;
+		}
+
+		// calculate distance from the center of the voxel to the ray though the origin
+		float32 tUL = xUL * cos(theta) + yUL * sin(theta);
+		float32 tUR = xUR * cos(theta) + yUR * sin(theta);
+		float32 tLL = xLL * cos(theta) + yLL * sin(theta);
+		float32 tLR = xLR * cos(theta) + yLR * sin(theta);
+		if (inverse) {
+			tUL *= -1.0f;
+			tUR *= -1.0f;
+			tLL *= -1.0f;
+			tLR *= -1.0f;
+		}
+		float32 tMin = min(tUL, min(tUR, min(tLL,tLR)));
+		float32 tMax = max(tUL, max(tUR, max(tLL,tLR)));
+
+		// calculate the offset on the detectorarray (in indices)
+		int dmin = (int)floor(m_pProjectionGeometry->detectorOffsetToIndexFloat(tMin));
+		int dmax = (int)ceil(m_pProjectionGeometry->detectorOffsetToIndexFloat(tMax));
+
+		// add affected detectors to the list
+		for (int i = dmin; i <= dmax; ++i) {
+			if (i >= 0 && i < m_pProjectionGeometry->getDetectorCount()) {
+				SDetector2D det;
+				det.m_iAngleIndex = iProjection;
+				det.m_iDetectorIndex = i;
+				det.m_iIndex = iProjection * getProjectionGeometry()->getDetectorCount() + i;
+				res.push_back(det);
+			}
+		}
+	}
+
+	// return result vector
+	return res;
+
+}
+
+//----------------------------------------------------------------------------------------