1 files changed, 75 insertions, 0 deletions
diff --git a/include/astra/cuda/2d/em.h b/include/astra/cuda/2d/em.h
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+++ b/include/astra/cuda/2d/em.h
@@ -0,0 +1,75 @@
+/*
+-----------------------------------------------------------------------
+Copyright: 2010-2018, imec Vision Lab, University of Antwerp
+           2014-2018, 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/>.
+
+-----------------------------------------------------------------------
+*/
+
+#ifndef _CUDA_EM_H
+#define _CUDA_EM_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