NonseparableSpatiallyVaryingFilters3D.h

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//
/*
    Copyright (C) 2000- 2007, Hammersmith Imanet
    SPDX-License-Identifier: Apache-2.0
    See STIR/LICENSE.txt for details
*/
 
#ifndef __stir_NonseparableSpatiallyVaryingFilters3D_H__
#define __stir_NonseparableSpatiallyVaryingFilters3D_H__
 
#include "stir_experimental/ModifiedInverseAverigingArrayFilter.h"
#include "stir/DiscretisedDensity.h"
#include "stir/DataProcessor.h"
#include "stir/RegisteredParsingObject.h"
#include "stir/VectorWithOffset.h"
#include "stir/ProjData.h"
#include "stir_experimental/ArrayFilter2DUsingConvolution.h"
#include "stir_experimental/ArrayFilter3DUsingConvolution.h"
 
#include "stir/shared_ptr.h"
 
START_NAMESPACE_STIR
 
// TODO!! remove define
 
#define num_dimensions 3
 
template <typename elemT>
class NonseparableSpatiallyVaryingFilters3D
    : public RegisteredParsingObject<NonseparableSpatiallyVaryingFilters3D<elemT>,
                                     DataProcessor<DiscretisedDensity<num_dimensions, elemT>>,
                                     DataProcessor<DiscretisedDensity<num_dimensions, elemT>>>
{
private:
  typedef RegisteredParsingObject<NonseparableSpatiallyVaryingFilters3D<elemT>,
                                  DataProcessor<DiscretisedDensity<num_dimensions, elemT>>,
                                  DataProcessor<DiscretisedDensity<num_dimensions, elemT>>>
      base_type;
 
public:
  static const char* const registered_name;

  NonseparableSpatiallyVaryingFilters3D();
 
  NonseparableSpatiallyVaryingFilters3D(string proj_data_filename,
                                        string attenuation_proj_data_filename,
                                        const Array<3, float>& filter_coefficients,
                                        shared_ptr<ProjData> proj_data_ptr,
                                        shared_ptr<ProjData> attenuation_proj_data_ptr,
                                        DiscretisedDensity<3, float>* initial_image,
                                        DiscretisedDensity<3, float>* sensitivity_image,
                                        DiscretisedDensity<3, float>* precomputed_coefficients_image,
                                        DiscretisedDensity<3, float>* normalised_bck_image,
                                        int mask_size,
                                        float rescaling_coefficient);
 
private:
  int mask_size;
  Array<3, float> filter_coefficients_for_parsing;
  mutable Array<3, float> filter_coefficients;
 
  shared_ptr<ProjData> proj_data_ptr;
  string proj_data_filename;
 
  shared_ptr<ProjData> attenuation_proj_data_ptr;
  string attenuation_proj_data_filename;
 
  DiscretisedDensity<3, float>* initial_image;
  string initial_image_filename;
 
  DiscretisedDensity<3, float>* sensitivity_image;
  string sensitivity_image_filename;
 
  mutable DiscretisedDensity<3, float>* precomputed_coefficients_image;
  string precomputed_coefficients_filename;
 
  DiscretisedDensity<3, float>* normalised_bck_image;
  string normalised_bck_filename;
  float rescaling_coefficient;
  mutable float k_interval;
  int recompute_every_num_subiterations;
  int recompute_from_subiteration_num;
 
  Succeeded virtual_set_up(const DiscretisedDensity<num_dimensions, elemT>& density);
  // new
  void virtual_apply(DiscretisedDensity<num_dimensions, elemT>& out_density,
                     const DiscretisedDensity<num_dimensions, elemT>& in_density) const;
  void virtual_apply(DiscretisedDensity<num_dimensions, elemT>& density) const;
  void precalculate_filter_coefficients_3D(
      VectorWithOffset<VectorWithOffset<VectorWithOffset<shared_ptr<ArrayFilter3DUsingConvolution<float>>>>>&
          all_filter_coefficients,
      DiscretisedDensity<3, elemT>* in_density) const;
 
  virtual void set_defaults();
  virtual void initialise_keymap();
 
  virtual bool post_processing();
};
 
#undef num_dimensions
 
END_NAMESPACE_STIR
 
#endif