FBP2DReconstruction.h

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//
//
#ifndef __stir_analytic_FBP2D_FBP2DReconstruction_H__
#define __stir_analytic_FBP2D_FBP2DReconstruction_H__
/*
    Copyright (C) 2000 PARAPET partners
    Copyright (C) 2000- 2011, Hammersmith Imanet Ltd
    Copyright (C) 2020, University College London
    This file is part of STIR.

    SPDX-License-Identifier: Apache-2.0 AND License-ref-PARAPET-license

    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"

START_NAMESPACE_STIR

template <int num_dimensions, typename elemT>
class DiscretisedDensity;
class Succeeded;
class ProjData;

class FBP2DReconstruction
    : public RegisteredParsingObject<FBP2DReconstruction, Reconstruction<DiscretisedDensity<3, float>>, AnalyticReconstruction>
{
  // typedef AnalyticReconstruction base_type;
  typedef RegisteredParsingObject<FBP2DReconstruction, Reconstruction<DiscretisedDensity<3, float>>, AnalyticReconstruction>
      base_type;
#ifdef SWIG
  // work-around swig problem. It gets confused when using a private (or protected)
  // typedef in a definition of a public typedef/member
 public:
#else
private:
#endif
  typedef DiscretisedDensity<3, float> TargetT;

public:
  static const char* const registered_name;

  FBP2DReconstruction();
  explicit FBP2DReconstruction(const std::string& parameter_filename);

  FBP2DReconstruction(const shared_ptr<ProjData>&,
                      const double alpha_ramp = 1.,
                      const double fc_ramp = .5,
                      const int pad_in_s = 2,
                      const int num_segments_to_combine = -1);

  std::string method_info() const override;

  virtual void ask_parameters();

  Succeeded set_up(shared_ptr<TargetT> const& target_data_sptr) override;

protected: // make parameters protected such that doc shows always up in doxygen
  // parameters used for parsing

  double alpha_ramp;
  double fc_ramp;
  int pad_in_s;

  int num_segments_to_combine;

  int display_level;

private:
  Succeeded actual_reconstruct(shared_ptr<DiscretisedDensity<3, float>> const& target_image_ptr) override;

  shared_ptr<BackProjectorByBin> back_projector_sptr;

  void set_defaults() override;
  void initialise_keymap() override;
  bool post_processing() override;
};

END_NAMESPACE_STIR

#endif