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/*
-----------------------------------------------------------------------
Copyright: 2010-2021, imec Vision Lab, University of Antwerp
2014-2021, 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_SIRT_H
#define _CUDA_SIRT_H
#include "algo.h"
namespace astraCUDA {
class _AstraExport SIRT : public ReconAlgo {
public:
SIRT();
~SIRT();
virtual bool init();
// Do optional long-object compensation. See the comments in sirt.cu.
// Call this after init(). It can not be used in combination with masks.
bool doSlabCorrections();
// Set min/max masks to existing GPU memory buffers
bool setMinMaxMasks(float* D_minMaskData, float* D_maxMaskData,
unsigned int pitch);
// Set min/max masks from RAM buffers
bool uploadMinMaxMasks(const float* minMaskData, const float* maxMaskData,
unsigned int pitch);
void setRelaxation(float r) { fRelaxation = r; }
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_lineWeight;
unsigned int linePitch;
float* D_pixelWeight;
unsigned int pixelPitch;
// Masks
bool freeMinMaxMasks;
float* D_minMaskData;
unsigned int minMaskPitch;
float* D_maxMaskData;
unsigned int maxMaskPitch;
float fRelaxation;
};
bool doSIRT(float* D_volumeData, unsigned int volumePitch,
float* D_projData, unsigned int projPitch,
float* D_maskData, unsigned int maskPitch,
const SDimensions& dims, const float* angles,
const float* TOffsets, unsigned int iterations);
}
#endif
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