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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/>.
+
+-----------------------------------------------------------------------
+$Id$
+*/
+
+#ifndef _CUDA_EM_H
+#define _CUDA_EM_H
+
+#include "util.h"
+#include "algo.h"
+
+namespace astraCUDA {
+
+class _AstraExport EM : public ReconAlgo {
+public:
+ EM();
+ virtual ~EM();
+
+ // disable some features
+ virtual bool enableSinogramMask() { return false; }
+ virtual bool enableVolumeMask() { return false; }
+ virtual bool setMinConstraint(float) { return false; }
+ virtual bool setMaxConstraint(float) { return false; }
+
+ virtual bool init();
+
+ virtual bool iterate(unsigned int iterations);
+
+ virtual float computeDiffNorm();
+
+protected:
+ void reset();
+ bool precomputeWeights();
+
+ // Temporary buffers
+ float* D_projData;
+ unsigned int projPitch;
+
+ float* D_tmpData;
+ unsigned int tmpPitch;
+
+ // Geometry-specific precomputed data
+ float* D_pixelWeight;
+ unsigned int pixelPitch;
+};
+
+_AstraExport bool doEM(float* D_volumeData, unsigned int volumePitch,
+ float* D_projData, unsigned int projPitch,
+ const SDimensions& dims, const float* angles,
+ const float* TOffsets, unsigned int iterations);
+
+}
+
+#endif