diff options
Diffstat (limited to 'src/SirtAlgorithm.cpp')
| -rw-r--r-- | src/SirtAlgorithm.cpp | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/src/SirtAlgorithm.cpp b/src/SirtAlgorithm.cpp new file mode 100644 index 0000000..60cee8a --- /dev/null +++ b/src/SirtAlgorithm.cpp @@ -0,0 +1,321 @@ +/* +----------------------------------------------------------------------- +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/SirtAlgorithm.h" + +#include <boost/lexical_cast.hpp> + +#include "astra/AstraObjectManager.h" +#include "astra/DataProjectorPolicies.h" + +using namespace std; + +namespace astra { + +#include "astra/Projector2DImpl.inl" + +// type of the algorithm, needed to register with CAlgorithmFactory +std::string CSirtAlgorithm::type = "SIRT"; + +//---------------------------------------------------------------------------------------- +// Constructor +CSirtAlgorithm::CSirtAlgorithm() +{ + _clear(); +} + +//--------------------------------------------------------------------------------------- +// Initialize - C++ +CSirtAlgorithm::CSirtAlgorithm(CProjector2D* _pProjector, + CFloat32ProjectionData2D* _pSinogram, + CFloat32VolumeData2D* _pReconstruction) +{ + _clear(); + initialize(_pProjector, _pSinogram, _pReconstruction); +} + +//---------------------------------------------------------------------------------------- +// Destructor +CSirtAlgorithm::~CSirtAlgorithm() +{ + clear(); +} + +//--------------------------------------------------------------------------------------- +// Clear - Constructors +void CSirtAlgorithm::_clear() +{ + CReconstructionAlgorithm2D::_clear(); + m_bIsInitialized = false; + + m_pTotalRayLength = NULL; + m_pTotalPixelWeight = NULL; + m_pDiffSinogram = NULL; + m_pTmpVolume = NULL; + + m_iIterationCount = 0; +} + +//--------------------------------------------------------------------------------------- +// Clear - Public +void CSirtAlgorithm::clear() +{ + CReconstructionAlgorithm2D::_clear(); + m_bIsInitialized = false; + + ASTRA_DELETE(m_pTotalRayLength); + ASTRA_DELETE(m_pTotalPixelWeight); + ASTRA_DELETE(m_pDiffSinogram); + ASTRA_DELETE(m_pTmpVolume); + + m_iIterationCount = 0; +} + +//---------------------------------------------------------------------------------------- +// Check +bool CSirtAlgorithm::_check() +{ + // check base class + ASTRA_CONFIG_CHECK(CReconstructionAlgorithm2D::_check(), "SIRT", "Error in ReconstructionAlgorithm2D initialization"); + + ASTRA_CONFIG_CHECK(m_pTotalRayLength, "SIRT", "Invalid TotalRayLength Object"); + ASTRA_CONFIG_CHECK(m_pTotalRayLength->isInitialized(), "SIRT", "Invalid TotalRayLength Object"); + ASTRA_CONFIG_CHECK(m_pTotalPixelWeight, "SIRT", "Invalid TotalPixelWeight Object"); + ASTRA_CONFIG_CHECK(m_pTotalPixelWeight->isInitialized(), "SIRT", "Invalid TotalPixelWeight Object"); + ASTRA_CONFIG_CHECK(m_pDiffSinogram, "SIRT", "Invalid DiffSinogram Object"); + ASTRA_CONFIG_CHECK(m_pDiffSinogram->isInitialized(), "SIRT", "Invalid DiffSinogram Object"); + + return true; +} + +//--------------------------------------------------------------------------------------- +// Initialize - Config +bool CSirtAlgorithm::initialize(const Config& _cfg) +{ + ASTRA_ASSERT(_cfg.self); + ConfigStackCheck<CAlgorithm> CC("SirtAlgorithm", this, _cfg); + + // if already initialized, clear first + if (m_bIsInitialized) { + clear(); + } + + // initialization of parent class + if (!CReconstructionAlgorithm2D::initialize(_cfg)) { + return false; + } + + // init data objects and data projectors + _init(); + + // success + m_bIsInitialized = _check(); + return m_bIsInitialized; +} + +//--------------------------------------------------------------------------------------- +// Initialize - C++ +bool CSirtAlgorithm::initialize(CProjector2D* _pProjector, + CFloat32ProjectionData2D* _pSinogram, + CFloat32VolumeData2D* _pReconstruction) +{ + // if already initialized, clear first + if (m_bIsInitialized) { + clear(); + } + + // required classes + m_pProjector = _pProjector; + m_pSinogram = _pSinogram; + m_pReconstruction = _pReconstruction; + + // init data objects and data projectors + _init(); + + // success + m_bIsInitialized = _check(); + return m_bIsInitialized; +} + +//--------------------------------------------------------------------------------------- +// Initialize Data Projectors - private +void CSirtAlgorithm::_init() +{ + // create data objects + m_pTotalRayLength = new CFloat32ProjectionData2D(m_pProjector->getProjectionGeometry()); + m_pTotalPixelWeight = new CFloat32VolumeData2D(m_pProjector->getVolumeGeometry()); + m_pDiffSinogram = new CFloat32ProjectionData2D(m_pProjector->getProjectionGeometry()); + m_pTmpVolume = new CFloat32VolumeData2D(m_pProjector->getVolumeGeometry()); +} + +//--------------------------------------------------------------------------------------- +// Information - All +map<string,boost::any> CSirtAlgorithm::getInformation() +{ + map<string, boost::any> res; + return mergeMap<string,boost::any>(CReconstructionAlgorithm2D::getInformation(), res); +}; + +//--------------------------------------------------------------------------------------- +// Information - Specific +boost::any CSirtAlgorithm::getInformation(std::string _sIdentifier) +{ + return CAlgorithm::getInformation(_sIdentifier); +}; + +//---------------------------------------------------------------------------------------- +// Iterate +void CSirtAlgorithm::run(int _iNrIterations) +{ + // check initialized + ASTRA_ASSERT(m_bIsInitialized); + + m_bShouldAbort = false; + + int iIteration = 0; + + // data projectors + CDataProjectorInterface* pForwardProjector; + CDataProjectorInterface* pBackProjector; + CDataProjectorInterface* pFirstForwardProjector; + + m_pTotalRayLength->setData(0.0f); + m_pTotalPixelWeight->setData(0.0f); + + // forward projection data projector + pForwardProjector = dispatchDataProjector( + m_pProjector, + SinogramMaskPolicy(m_pSinogramMask), // sinogram mask + ReconstructionMaskPolicy(m_pReconstructionMask), // reconstruction mask + DiffFPPolicy(m_pReconstruction, m_pDiffSinogram, m_pSinogram), // forward projection with difference calculation + m_bUseSinogramMask, m_bUseReconstructionMask, true // options on/off + ); + + // backprojection data projector + pBackProjector = dispatchDataProjector( + m_pProjector, + SinogramMaskPolicy(m_pSinogramMask), // sinogram mask + ReconstructionMaskPolicy(m_pReconstructionMask), // reconstruction mask + DefaultBPPolicy(m_pTmpVolume, m_pDiffSinogram), // backprojection + m_bUseSinogramMask, m_bUseReconstructionMask, true // options on/off + ); + + // first time forward projection data projector, + // also computes total pixel weight and total ray length + pFirstForwardProjector = dispatchDataProjector( + m_pProjector, + SinogramMaskPolicy(m_pSinogramMask), // sinogram mask + ReconstructionMaskPolicy(m_pReconstructionMask), // reconstruction mask + Combine3Policy<DiffFPPolicy, TotalPixelWeightPolicy, TotalRayLengthPolicy>( // 3 basic operations + DiffFPPolicy(m_pReconstruction, m_pDiffSinogram, m_pSinogram), // forward projection with difference calculation + TotalPixelWeightPolicy(m_pTotalPixelWeight), // calculate the total pixel weights + TotalRayLengthPolicy(m_pTotalRayLength)), // calculate the total ray lengths + m_bUseSinogramMask, m_bUseReconstructionMask, true // options on/off + ); + + + + // forward projection, difference calculation and raylength/pixelweight computation + pFirstForwardProjector->project(); + + float32* pfT = m_pTotalPixelWeight->getData(); + for (int i = 0; i < m_pTotalPixelWeight->getSize(); ++i) { + float32 x = pfT[i]; + if (x < -eps || x > eps) + x = 1.0f / x; + else + x = 0.0f; + pfT[i] = x; + } + pfT = m_pTotalRayLength->getData(); + for (int i = 0; i < m_pTotalRayLength->getSize(); ++i) { + float32 x = pfT[i]; + if (x < -eps || x > eps) + x = 1.0f / x; + else + x = 0.0f; + pfT[i] = x; + } + + // divide by line weights + (*m_pDiffSinogram) *= (*m_pTotalRayLength); + + // backprojection + m_pTmpVolume->setData(0.0f); + pBackProjector->project(); + + // divide by pixel weights + (*m_pTmpVolume) *= (*m_pTotalPixelWeight); + (*m_pReconstruction) += (*m_pTmpVolume); + + if (m_bUseMinConstraint) + m_pReconstruction->clampMin(m_fMinValue); + if (m_bUseMaxConstraint) + m_pReconstruction->clampMax(m_fMaxValue); + + // update iteration count + m_iIterationCount++; + iIteration++; + + + + + // iteration loop + for (; iIteration < _iNrIterations && !m_bShouldAbort; ++iIteration) { + // forward projection and difference calculation + pForwardProjector->project(); + + // divide by line weights + (*m_pDiffSinogram) *= (*m_pTotalRayLength); + + + // backprojection + m_pTmpVolume->setData(0.0f); + pBackProjector->project(); + + // divide by pixel weights + (*m_pTmpVolume) *= (*m_pTotalPixelWeight); + (*m_pReconstruction) += (*m_pTmpVolume); + + if (m_bUseMinConstraint) + m_pReconstruction->clampMin(m_fMinValue); + if (m_bUseMaxConstraint) + m_pReconstruction->clampMax(m_fMaxValue); + + // update iteration count + m_iIterationCount++; + } + + + ASTRA_DELETE(pForwardProjector); + ASTRA_DELETE(pBackProjector); + ASTRA_DELETE(pFirstForwardProjector); +} +//---------------------------------------------------------------------------------------- + +} // namespace astra |