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/*
-----------------------------------------------------------------------
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_ALGO_H
#define _CUDA_ALGO_H
#include "astra/Globals.h"
#include "dims.h"
namespace astra {
class CParallelProjectionGeometry2D;
class CParallelVecProjectionGeometry2D;
class CFanFlatProjectionGeometry2D;
class CFanFlatVecProjectionGeometry2D;
class CVolumeGeometry2D;
class CProjectionGeometry2D;
}
namespace astraCUDA {
class _AstraExport ReconAlgo {
public:
ReconAlgo();
virtual ~ReconAlgo();
bool setGPUIndex(int iGPUIndex);
bool setGeometry(const astra::CVolumeGeometry2D* pVolGeom,
const astra::CProjectionGeometry2D* pProjGeom);
bool setSuperSampling(int raysPerDet, int raysPerPixelDim);
// Scale the final reconstruction.
// May be called at any time after setGeometry and before iterate(). Multiple calls stack.
bool setReconstructionScale(float fScale);
virtual bool enableVolumeMask();
virtual bool enableSinogramMask();
// init should be called after setting all geometry
virtual bool init() = 0;
// 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(float* D_maskData, unsigned int maskPitch);
// 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(float* D_smaskData, unsigned int smaskPitch);
// setBuffers should be called after init and before iterate.
// It may be called again after iterate.
virtual bool setBuffers(float* D_volumeData, unsigned int volumePitch,
float* D_projData, unsigned int projPitch);
// instead of calling setBuffers, you can also call allocateBuffers
// to let ReconAlgo manage its own GPU memory
virtual bool allocateBuffers();
// copy data to GPU. This must be called after allocateBuffers.
// pfSinogram, pfReconstruction, pfVolMask, pfSinoMask are the
// sinogram, reconstruction, volume mask and sinogram mask in system RAM,
// respectively. The corresponding pitch variables give the pitches
// of these buffers, measured in floats.
virtual bool copyDataToGPU(const float* pfSinogram, unsigned int iSinogramPitch,
const float* pfReconstruction, unsigned int iReconstructionPitch,
const float* pfVolMask, unsigned int iVolMaskPitch,
const float* pfSinoMask, unsigned int iSinoMaskPitch);
// set Min/Max constraints. They may be called at any time, and will affect
// any iterate() calls afterwards.
virtual bool setMinConstraint(float fMin);
virtual bool setMaxConstraint(float fMax);
// iterate should be called after init and setBuffers.
// It may be called multiple times.
virtual bool iterate(unsigned int iterations) = 0;
// 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.
virtual float computeDiffNorm() = 0;
// TODO: computeDiffNorm shouldn't be virtual, but for it to be
// implemented in ReconAlgo, it needs a way to get a suitable
// temporary sinogram buffer.
bool getReconstruction(float* pfReconstruction,
unsigned int iReconstructionPitch) const;
protected:
void reset();
bool callFP(float* D_volumeData, unsigned int volumePitch,
float* D_projData, unsigned int projPitch,
float outputScale);
bool callBP(float* D_volumeData, unsigned int volumePitch,
float* D_projData, unsigned int projPitch,
float outputScale);
SDimensions dims;
SParProjection* parProjs;
SFanProjection* fanProjs;
float fProjectorScale;
bool freeGPUMemory;
// Input/output
float* D_sinoData;
unsigned int sinoPitch;
float* D_volumeData;
unsigned int volumePitch;
// Masks
bool useVolumeMask;
bool useSinogramMask;
float* D_maskData;
unsigned int maskPitch;
float* D_smaskData;
unsigned int smaskPitch;
// Min/max
bool useMinConstraint;
bool useMaxConstraint;
float fMinConstraint;
float fMaxConstraint;
};
}
#endif
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