diff options
Diffstat (limited to 'include/astra')
| -rw-r--r-- | include/astra/CudaSartAlgorithm.h | 10 | ||||
| -rw-r--r-- | include/astra/CudaSirtAlgorithm.h | 6 | ||||
| -rw-r--r-- | include/astra/DataProjectorPolicies.h | 4 | ||||
| -rw-r--r-- | include/astra/DataProjectorPolicies.inl | 6 | ||||
| -rw-r--r-- | include/astra/SartAlgorithm.h | 8 | ||||
| -rw-r--r-- | include/astra/SirtAlgorithm.h | 9 |
6 files changed, 37 insertions, 6 deletions
diff --git a/include/astra/CudaSartAlgorithm.h b/include/astra/CudaSartAlgorithm.h index c22dc4f..e5e18f0 100644 --- a/include/astra/CudaSartAlgorithm.h +++ b/include/astra/CudaSartAlgorithm.h @@ -46,6 +46,7 @@ namespace astra { * \astra_xml_item{ProjectionDataId, integer, Identifier of a projection data object as it is stored in the DataManager.} * \astra_xml_item{ReconstructionDataId, integer, Identifier of a volume data object as it is stored in the DataManager.} * \astra_xml_item_option{ReconstructionMaskId, integer, not used, Identifier of a volume data object that acts as a reconstruction mask. 0 = reconstruct on this pixel. 1 = don't reconstruct on this pixel.} + * \astra_xml_item_option{Relaxation, float, 1, The relaxation factor.} * * \par MATLAB example * \astra_code{ @@ -53,6 +54,7 @@ namespace astra { * cfg.ProjectionDataId = sino_id;\n * cfg.ReconstructionDataId = recon_id;\n * cfg.option.ReconstructionMaskId = mask_id;\n + * cfg.option.Relaxation = 1.0;\n * alg_id = astra_mex_algorithm('create'\, cfg);\n * astra_mex_algorithm('iterate'\, alg_id\, 10);\n * astra_mex_algorithm('delete'\, alg_id);\n @@ -97,6 +99,14 @@ public: * @return description string */ virtual std::string description() const; + +protected: + + /** Relaxation factor + */ + float m_fLambda; + + virtual void initCUDAAlgorithm(); }; // inline functions diff --git a/include/astra/CudaSirtAlgorithm.h b/include/astra/CudaSirtAlgorithm.h index 91cc206..3cd8acc 100644 --- a/include/astra/CudaSirtAlgorithm.h +++ b/include/astra/CudaSirtAlgorithm.h @@ -53,6 +53,7 @@ namespace astra { * \astra_xml_item{ProjectionDataId, integer, Identifier of a projection data object as it is stored in the DataManager.} * \astra_xml_item{ReconstructionDataId, integer, Identifier of a volume data object as it is stored in the DataManager.} * \astra_xml_item_option{ReconstructionMaskId, integer, not used, Identifier of a volume data object that acts as a reconstruction mask. 0 = reconstruct on this pixel. 1 = don't reconstruct on this pixel.} + * \astra_xml_item_option{Relaxation, float, 1, Relaxation parameter.} * * \par MATLAB example * \astra_code{ @@ -62,6 +63,7 @@ namespace astra { * cfg.ProjectionDataId = sino_id;\n * cfg.ReconstructionDataId = recon_id;\n * cfg.option.ReconstructionMaskId = mask_id;\n + * cfg.option.Relaxation = 1.0;\n * alg_id = astra_mex_algorithm('create'\, cfg);\n * astra_mex_algorithm('iterate'\, alg_id\, 10);\n * astra_mex_algorithm('delete'\, alg_id);\n @@ -113,6 +115,10 @@ protected: CFloat32VolumeData2D* m_pMinMask; CFloat32VolumeData2D* m_pMaxMask; + /** Relaxation factor + */ + float m_fLambda; + virtual void initCUDAAlgorithm(); }; diff --git a/include/astra/DataProjectorPolicies.h b/include/astra/DataProjectorPolicies.h index c258f5c..acfb36f 100644 --- a/include/astra/DataProjectorPolicies.h +++ b/include/astra/DataProjectorPolicies.h @@ -319,10 +319,12 @@ class SIRTBPPolicy { CFloat32ProjectionData2D* m_pTotalRayLength; CFloat32VolumeData2D* m_pTotalPixelWeight; + float m_fRelaxation; + public: FORCEINLINE SIRTBPPolicy(); - FORCEINLINE SIRTBPPolicy(CFloat32VolumeData2D* _pReconstruction, CFloat32ProjectionData2D* _pSinogram, CFloat32VolumeData2D* _pTotalPixelWeight, CFloat32ProjectionData2D* _pTotalRayLength); + FORCEINLINE SIRTBPPolicy(CFloat32VolumeData2D* _pReconstruction, CFloat32ProjectionData2D* _pSinogram, CFloat32VolumeData2D* _pTotalPixelWeight, CFloat32ProjectionData2D* _pTotalRayLength, float _fRelaxation); FORCEINLINE ~SIRTBPPolicy(); FORCEINLINE bool rayPrior(int _iRayIndex); diff --git a/include/astra/DataProjectorPolicies.inl b/include/astra/DataProjectorPolicies.inl index 0c0eddd..f300761 100644 --- a/include/astra/DataProjectorPolicies.inl +++ b/include/astra/DataProjectorPolicies.inl @@ -712,12 +712,14 @@ SIRTBPPolicy::SIRTBPPolicy() SIRTBPPolicy::SIRTBPPolicy(CFloat32VolumeData2D* _pReconstruction, CFloat32ProjectionData2D* _pSinogram, CFloat32VolumeData2D* _pTotalPixelWeight, - CFloat32ProjectionData2D* _pTotalRayLength) + CFloat32ProjectionData2D* _pTotalRayLength, + float _fRelaxation) { m_pReconstruction = _pReconstruction; m_pSinogram = _pSinogram; m_pTotalPixelWeight = _pTotalPixelWeight; m_pTotalRayLength = _pTotalRayLength; + m_fRelaxation = _fRelaxation; } //---------------------------------------------------------------------------------------- SIRTBPPolicy::~SIRTBPPolicy() @@ -739,7 +741,7 @@ void SIRTBPPolicy::addWeight(int _iRayIndex, int _iVolumeIndex, float32 _fWeight { float32 fGammaBeta = m_pTotalPixelWeight->getData()[_iVolumeIndex] * m_pTotalRayLength->getData()[_iRayIndex]; if ((fGammaBeta > 0.001f) || (fGammaBeta < -0.001f)) { - m_pReconstruction->getData()[_iVolumeIndex] += _fWeight * m_pSinogram->getData()[_iRayIndex] / fGammaBeta; + m_pReconstruction->getData()[_iVolumeIndex] += _fWeight * m_fRelaxation * m_pSinogram->getData()[_iRayIndex] / fGammaBeta; } } //---------------------------------------------------------------------------------------- diff --git a/include/astra/SartAlgorithm.h b/include/astra/SartAlgorithm.h index eb4c61e..cdae029 100644 --- a/include/astra/SartAlgorithm.h +++ b/include/astra/SartAlgorithm.h @@ -49,7 +49,7 @@ namespace astra { * * The update step of pixel \f$v_j\f$ for projection \f$phi\f$ and iteration \f$k\f$ is given by: * \f[ - * v_j^{(k+1)} = v_j^{(k)} + \frac{\sum_{p_i \in P_\phi} \left( \lambda \frac{p_i - \sum_{r=1}^{N} w_{ir}v_r^{(k)}} {\sum_{r=1}^{N}w_{ir} } \right)} {\sum_{p_i \in P_\phi}w_{ij}} + * v_j^{(k+1)} = v_j^{(k)} + \lambda \frac{\sum_{p_i \in P_\phi} \left( \frac{p_i - \sum_{r=1}^{N} w_{ir}v_r^{(k)}} {\sum_{r=1}^{N}w_{ir} } \right)} {\sum_{p_i \in P_\phi}w_{ij}} * \f] * * \par XML Configuration @@ -64,6 +64,7 @@ namespace astra { * \astra_xml_item_option{MaxConstraintValue, float, 255, Maximum constraint value.} * \astra_xml_item_option{ProjectionOrder, string, "sequential", the order in which the projections are updated. 'sequential', 'random' or 'custom'} * \astra_xml_item_option{ProjectionOrderList, vector of float, not used, if ProjectionOrder='custom': use this order.} + * \astra_xml_item_option{Relaxation, float, 1, The relaxation parameter.} * * \par MATLAB example * \astra_code{ @@ -76,7 +77,8 @@ namespace astra { * cfg.option.UseMaxConstraint = 'yes';\n * cfg.option.MaxConstraintValue = 1024;\n * cfg.option.ProjectionOrder = 'custom';\n -* cfg.option.ProjectionOrderList = randperm(100);\n + * cfg.option.ProjectionOrderList = randperm(100);\n + * cfg.option.Relaxation = 1.0;\n * alg_id = astra_mex_algorithm('create'\, cfg);\n * astra_mex_algorithm('iterate'\, alg_id\, 10);\n * astra_mex_algorithm('delete'\, alg_id);\n @@ -215,6 +217,8 @@ protected: //< Current index in the projection order array. int m_iCurrentProjection; + //< Relaxation parameter + float m_fLambda; }; // inline functions diff --git a/include/astra/SirtAlgorithm.h b/include/astra/SirtAlgorithm.h index 05b3fa9..8044d09 100644 --- a/include/astra/SirtAlgorithm.h +++ b/include/astra/SirtAlgorithm.h @@ -49,7 +49,7 @@ namespace astra { * * The update step of pixel \f$v_j\f$ for iteration \f$k\f$ is given by: * \f[ - * v_j^{(k+1)} = v_j^{(k)} + \alpha \sum_{i=1}^{M} \left( \frac{w_{ij}\left( p_i - \sum_{r=1}^{N} w_{ir}v_r^{(k)}\right)}{\sum_{k=1}^{N} w_{ik}} \right) \frac{1}{\sum_{l=1}^{M}w_{lj}} + * v_j^{(k+1)} = v_j^{(k)} + \lambda \sum_{i=1}^{M} \left( \frac{w_{ij}\left( p_i - \sum_{r=1}^{N} w_{ir}v_r^{(k)}\right)}{\sum_{k=1}^{N} w_{ik}} \right) \frac{1}{\sum_{l=1}^{M}w_{lj}} * \f] * * \par XML Configuration @@ -62,6 +62,7 @@ namespace astra { * \astra_xml_item_option{MinConstraintValue, float, 0, Minimum constraint value.} * \astra_xml_item_option{UseMaxConstraint, bool, false, Use maximum value constraint.} * \astra_xml_item_option{MaxConstraintValue, float, 255, Maximum constraint value.} + * \astra_xml_item_option{Relaxation, float, 1, The relaxation factor.} * * \par XML Example * \astra_code{ @@ -74,6 +75,7 @@ namespace astra { * <Option key="UseMinConstraint" value="yes"/>\n * <Option key="UseMaxConstraint" value="yes"/>\n * <Option key="MaxConstraintValue" value="1024"/>\n + * <Option key="Relaxation" value="1"/>\n * </Algorithm> * } * @@ -88,6 +90,7 @@ namespace astra { * cfg.option.UseMinConstraint = 'yes';\n * cfg.option.UseMaxConstraint = 'yes';\n * cfg.option.MaxConstraintValue = 1024;\n + * cfg.option.Relaxation = 1.0;\n * alg_id = astra_mex_algorithm('create'\, cfg);\n * astra_mex_algorithm('iterate'\, alg_id\, 10);\n * astra_mex_algorithm('delete'\, alg_id);\n @@ -136,6 +139,10 @@ protected: */ int m_iIterationCount; + /** Relaxation parameter + */ + float m_fLambda; + public: // type of the algorithm, needed to register with CAlgorithmFactory |