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Diffstat (limited to 'include/astra/ParallelVecProjectionGeometry2D.h')
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diff --git a/include/astra/ParallelVecProjectionGeometry2D.h b/include/astra/ParallelVecProjectionGeometry2D.h new file mode 100644 index 0000000..96f8a54 --- /dev/null +++ b/include/astra/ParallelVecProjectionGeometry2D.h @@ -0,0 +1,163 @@ +/* +----------------------------------------------------------------------- +Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp + 2014-2015, CWI, Amsterdam + +Contact: astra@uantwerpen.be +Website: http://sf.net/projects/astra-toolbox + +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/>. + +----------------------------------------------------------------------- +$Id$ +*/ + +#ifndef _INC_ASTRA_PARALLELVECPROJECTIONGEOMETRY2D +#define _INC_ASTRA_PARALLELVECPROJECTIONGEOMETRY2D + +#include "ProjectionGeometry2D.h" +#include "GeometryUtil2D.h" + +namespace astra +{ + +/** + * This class defines a 2D parallel beam projection geometry. + * + * \par XML Configuration + * \astra_xml_item{DetectorCount, int, Number of detectors for each projection.} + * + * \par MATLAB example + * \astra_code{ + * proj_geom = astra_struct('parallel_vec');\n + * proj_geom.DetectorCount = 512;\n + * proj_geom.Vectors = V;\n + * } + * + * \par Vectors + * Vectors is a matrix containing the actual geometry. Each row corresponds + * to a single projection, and consists of: + * ( rayX, rayY, dX, dY, uX, uY) + * ray: the ray direction + * d : the centre of the detector line + * u : the vector from detector pixel (0) to (1) + */ +class _AstraExport CParallelVecProjectionGeometry2D : public CProjectionGeometry2D +{ +protected: + + SParProjection *m_pProjectionAngles; + +public: + + /** Default constructor. Sets all variables to zero. Note that this constructor leaves the object in an unusable state and must + * be followed by a call to init(). + */ + CParallelVecProjectionGeometry2D(); + + /** Constructor. + * + * @param _iProjectionAngleCount Number of projection angles. + * @param _iDetectorCount Number of detectors, i.e., the number of detector measurements for each projection angle. + * @param _pfProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array. + */ + CParallelVecProjectionGeometry2D(int _iProjectionAngleCount, + int _iDetectorCount, + const SParProjection* _pfProjectionAngles); + + /** Copy constructor. + */ + CParallelVecProjectionGeometry2D(const CParallelVecProjectionGeometry2D& _projGeom); + + /** Assignment operator. + */ + CParallelVecProjectionGeometry2D& operator=(const CParallelVecProjectionGeometry2D& _other); + + /** Destructor. + */ + virtual ~CParallelVecProjectionGeometry2D(); + + /** Initialize the geometry with a config object. + * + * @param _cfg Configuration Object + * @return initialization successful? + */ + virtual bool initialize(const Config& _cfg); + + /** Initialization. This function MUST be called after using the default constructor and MAY be called to + * reset a previously initialized object. + * + * @param _iProjectionAngleCount Number of projection angles. + * @param _iDetectorCount Number of detectors, i.e., the number of detector measurements for each projection angle. + * @param _pfProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array. + */ + bool initialize(int _iProjectionAngleCount, + int _iDetectorCount, + const SParProjection* _pfProjectionAngles); + + virtual bool _check(); + + /** Create a hard copy. + */ + virtual CProjectionGeometry2D* clone(); + + /** 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 == "fanflat_vec". + */ + virtual bool isOfType(const std::string& _sType); + + /** 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; + + /** Get all settings in a Config object. + * + * @return Configuration Object. + */ + virtual Config* getConfiguration() const; + + + /** Get the value for t and theta, based upon the row and column index. + * + * @param _iRow row index + * @param _iColumn column index + * @param _fT output: value of t + * @param _fTheta output: value of theta, always lies within the [0,pi[ interval. + */ + virtual void getRayParams(int _iRow, int _iColumn, float32& _fT, float32& _fTheta) const; + + /** + * 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); + + const SParProjection* getProjectionVectors() const { return m_pProjectionAngles; } + +}; + +} // namespace astra + +#endif /* _INC_ASTRA_PARALLELVECPROJECTIONGEOMETRY2D */ |