GRD2DReconstruction.h

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//
//
#ifndef __stir_analytic_GRD2D_GRD2DReconstruction_H__
#define __stir_analytic_GRD2D_GRD2DReconstruction_H__
/*
    Copyright (C) 2014-2016, 2023-2025, Dimitra Kyriakopoulou
    Copyright (C) 2025, University College London
    This file is part of STIR.
 
    SPDX-License-Identifier: Apache-2.0
 
    See STIR/LICENSE.txt for details
*/
 
#include "stir/recon_buildblock/AnalyticReconstruction.h"
//#include "stir/recon_buildblock/BackProjectorByBin.h"
#include "stir/RegisteredParsingObject.h"
#include <string>
#include "stir/shared_ptr.h"
//#include "stir/Array_complex_numbers.h"
//#include "stir/numerics/fftshift.h"
 
START_NAMESPACE_STIR
 
template <int num_dimensions, typename elemT>
class DiscretisedDensity;
class Succeeded;
class ProjData;
 
class GRD2DReconstruction
    : public RegisteredParsingObject<GRD2DReconstruction, Reconstruction<DiscretisedDensity<3, float>>, AnalyticReconstruction>
{
  // typedef AnalyticReconstruction base_type;
  typedef RegisteredParsingObject<GRD2DReconstruction, Reconstruction<DiscretisedDensity<3, float>>, AnalyticReconstruction>
      base_type;
 
public:
  static constexpr const char* const registered_name = "GRD2D";

  GRD2DReconstruction();
  explicit GRD2DReconstruction(const std::string& parameter_filename);
 
  GRD2DReconstruction(const shared_ptr<ProjData>&,
                      const double noise_filter = -1.,
                      const double alpha_gridding = 1.,
                      const double kappa_gridding = 4.,
                      const int num_segments_to_combine = -1);
 
  virtual std::string method_info() const;
 
  virtual void ask_parameters();
 
  virtual Succeeded set_up(shared_ptr<TargetT> const& target_data_sptr);
 
protected: // make parameters protected such that doc shows always up in doxygen
  // parameters used for parsing
 
  // alpha and kappa for gridding
  double alpha_gridding;
  double kappa_gridding;
  // noise filter
  double noise_filter;


  int num_segments_to_combine;

  int display_level;
 
private:
  Succeeded actual_reconstruct(shared_ptr<DiscretisedDensity<3, float>> const& target_image_ptr);
 
  virtual void set_defaults();
  virtual void initialise_keymap();
  virtual bool post_processing();
  bool post_processing_only_GRD2D_parameters();
};
 
END_NAMESPACE_STIR
 
#endif