PostsmoothingBackProjectorByBin.h

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//
//
/*
    Copyright (C) 2002- 2007, Hammersmith Imanet
    Copyright (C) 2019, University College London
 
    This file is part of STIR.
 
    SPDX-License-Identifier: Apache-2.0
 
 
    See STIR/LICENSE.txt for details
*/
#ifndef __stir_recon_buildblock_PostsmoothingBackProjectorByBin__H__
#define __stir_recon_buildblock_PostsmoothingBackProjectorByBin__H__
 
#include "stir/RegisteredParsingObject.h"
#include "stir/recon_buildblock/BackProjectorByBin.h"
#include "stir/shared_ptr.h"
 
START_NAMESPACE_STIR
 
template <typename elemT>
class Viewgram;
template <typename DataT>
class DataProcessor;
class PostsmoothingBackProjectorByBin : public RegisteredParsingObject<PostsmoothingBackProjectorByBin, BackProjectorByBin>
{
#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 BackProjectorByBin base_type;
 
public:
  static const char* const registered_name;

  PostsmoothingBackProjectorByBin();
 
  ~PostsmoothingBackProjectorByBin() override;


  void set_up(const shared_ptr<const ProjDataInfo>& proj_data_info_ptr,
              const shared_ptr<const DiscretisedDensity<3, float>>& density_info_ptr // TODO should be Info only
              ) override;
 
  PostsmoothingBackProjectorByBin(const shared_ptr<BackProjectorByBin>& original_back_projector_ptr,
                                  const shared_ptr<DataProcessor<DiscretisedDensity<3, float>>>&);
 
  // Informs on which symmetries the projector handles
  // It should get data related by at least those symmetries.
  // Otherwise, a run-time error will occur (unless the derived
  // class has other behaviour).
  const DataSymmetriesForViewSegmentNumbers* get_symmetries_used() const override;
 
  BackProjectorByBin* get_original_back_projector_ptr() const;
 
  PostsmoothingBackProjectorByBin* clone() const override;
 
private:
  shared_ptr<BackProjectorByBin> original_back_projector_ptr;
 
#ifdef STIR_PROJECTORS_AS_V3
  void actual_back_project(DiscretisedDensity<3, float>&,
                           const RelatedViewgrams<float>&,
                           const int min_axial_pos_num,
                           const int max_axial_pos_num,
                           const int min_tangential_pos_num,
                           const int max_tangential_pos_num);
#endif
  void actual_back_project(const RelatedViewgrams<float>&,
                           const int min_axial_pos_num,
                           const int max_axial_pos_num,
                           const int min_tangential_pos_num,
                           const int max_tangential_pos_num) override;
 
  void actual_back_project(DiscretisedDensity<3, float>& density, const Bin& bin);
 
  shared_ptr<DiscretisedDensity<3, float>> filtered_density_sptr;
 
  void set_defaults() override;
  void initialise_keymap() override;
  bool post_processing() override;
};
 
END_NAMESPACE_STIR
 
#endif