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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_SIRT3D_H
#define _CUDA_SIRT3D_H
#include "algo3d.h"
namespace astraCUDA3d {
class _AstraExport SIRT : public ReconAlgo3D {
public:
SIRT();
~SIRT();
// bool setConeGeometry(const SDimensions3D& dims, const SConeProjection* projs);
bool enableVolumeMask();
bool enableSinogramMask();
// init should be called after setting all geometry
bool init();
// Set relaxation factor. This may be called after init and before iterate.
void setRelaxation(float r) { fRelaxation = r; }
// setVolumeMask should be called after init and before iterate,
// but only if enableVolumeMask was called before init.
// It may be called again after iterate.
bool setVolumeMask(cudaPitchedPtr& D_maskData);
// setSinogramMask should be called after init and before iterate,
// but only if enableSinogramMask was called before init.
// It may be called again after iterate.
bool setSinogramMask(cudaPitchedPtr& D_smaskData);
// setBuffers should be called after init and before iterate.
// It may be called again after iterate.
bool setBuffers(cudaPitchedPtr& D_volumeData,
cudaPitchedPtr& D_projData);
// set Min/Max constraints. They may be called at any time, and will affect
// any iterate() calls afterwards.
bool setMinConstraint(float fMin);
bool setMaxConstraint(float fMax);
// iterate should be called after init and setBuffers.
// It may be called multiple times.
bool iterate(unsigned int iterations);
// Compute the norm of the difference of the FP of the current reconstruction
// and the sinogram. (This performs one FP.)
// It can be called after iterate.
float computeDiffNorm();
protected:
void reset();
bool precomputeWeights();
bool useVolumeMask;
bool useSinogramMask;
bool useMinConstraint;
bool useMaxConstraint;
float fMinConstraint;
float fMaxConstraint;
float fRelaxation;
cudaPitchedPtr D_maskData;
cudaPitchedPtr D_smaskData;
// Input/output
cudaPitchedPtr D_sinoData;
cudaPitchedPtr D_volumeData;
// Temporary buffers
cudaPitchedPtr D_projData;
cudaPitchedPtr D_tmpData;
// Geometry-specific precomputed data
cudaPitchedPtr D_lineWeight;
cudaPitchedPtr D_pixelWeight;
};
bool doSIRT(cudaPitchedPtr D_volumeData, unsigned int volumePitch,
cudaPitchedPtr D_projData, unsigned int projPitch,
cudaPitchedPtr D_maskData, unsigned int maskPitch,
const SDimensions3D& dims, const SConeProjection* projs,
unsigned int iterations);
}
#endif
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