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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 _INC_ASTRA_SPARSEMATRIXPROJECTIONGEOMETRY2D
#define _INC_ASTRA_SPARSEMATRIXPROJECTIONGEOMETRY2D
#include "ProjectionGeometry2D.h"
namespace astra
{
class CSparseMatrix;
/**
* This class defines a projection geometry determined by an arbitrary
* sparse matrix.
*
* The projection data is assumed to be grouped by 'angle' and 'detector pixel'.
* This does not have any effect on the algorithms, but only on the
* way the projection data is stored and accessed.
*/
class _AstraExport CSparseMatrixProjectionGeometry2D : public CProjectionGeometry2D
{
public:
/** Default constructor. Sets all numeric member variables to 0 and all pointer member variables to NULL.
*
* If an object is constructed using this default constructor, it must always be followed by a call
* to one of the init() methods before the object can be used. Any use before calling init() is not allowed,
* except calling the member function isInitialized().
*
*/
CSparseMatrixProjectionGeometry2D();
/** Constructor. Create an instance of the CSparseMatrixProjectionGeometry2D class.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorCount Number of detectors, i.e., the number of detector measurements for each projection angle.
* @param _pMatrix Pointer to a CSparseMatrix. The caller is responsible for keeping this matrix valid until it is no longer required.
*/
CSparseMatrixProjectionGeometry2D(int _iProjectionAngleCount,
int _iDetectorCount,
const CSparseMatrix* _pMatrix);
/** Copy constructor.
*/
CSparseMatrixProjectionGeometry2D(const CSparseMatrixProjectionGeometry2D& _projGeom);
/** Destructor.
*/
~CSparseMatrixProjectionGeometry2D();
/** Assignment operator.
*/
CSparseMatrixProjectionGeometry2D& operator=(const CSparseMatrixProjectionGeometry2D& _other);
/** Initialize the geometry with a config object. This does not allow
* setting a matrix. Use the setMatrix() method for that afterwards.
*
* @param _cfg Configuration Object
* @return initialization successful?
*/
virtual bool initialize(const Config& _cfg);
/** Initialization. Initializes an instance of the CProjectionGeometry2D class. If the object has been
* initialized before, the object is reinitialized and memory is freed and reallocated if necessary.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorCount Number of detectors, i.e., the number of detector measurements for each projection angle.
* @param _pMatrix Pointer to a CSparseMatrix. The caller is responsible for keeping this matrix valid until it is no longer required.
*/
bool initialize(int _iProjectionAngleCount,
int _iDetectorCount,
const CSparseMatrix* _pMatrix);
/** Set the associated sparse matrix. The previous one is deleted.
*
* @param _pMatrix Pointer to a CSparseMatrix. The caller is responsible for keeping this matrix valid until it is no longer required.
* @return initialization successful?
*/
bool setMatrix(CSparseMatrix* _pMatrix);
/** Get a pointer to the associated sparse matrix.
* @return the associated sparse matrix
*/
const CSparseMatrix* getMatrix() const { return m_pMatrix; }
/** Create a hard copy.
*/
virtual CProjectionGeometry2D* clone();
/** Return true if this geometry instance is the same as the one specified.
*
* @return true if this geometry instance is the same as the one specified.
*/
virtual bool isEqual(CProjectionGeometry2D*) const;
/** Returns true if the type of geometry defined in this class is the one specified in _sType.
*
* @param _sType geometry type to compare to.
* @return true if _sType == "parallel".
*/
virtual bool isOfType(const std::string& _sType);
/**
* Returns a vector describing the direction of a ray belonging to a certain detector
*
* @param _iProjectionIndex index of projection
* @param _iProjectionIndex index of detector
*
* @return a unit vector describing the direction
*/
virtual CVector3D getProjectionDirection(int _iProjectionIndex, int _iDetectorIndex);
protected:
/** Check this object.
*
* @return object initialized
*/
bool _check();
const CSparseMatrix* m_pMatrix;
};
} // namespace astra
#endif /* _INC_ASTRA_SPARSEMATRIXPROJECTIONGEOMETRY2D */
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