ArrayFilter3DUsingConvolution.h

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//
//
/*
    Copyright (C) 2000- 2002, IRSL
    See STIR/LICENSE.txt for details
*/
 
#ifndef __stir_ArrayFilter3DUsingConvolution_H__
#define __stir_ArrayFilter3DUsingConvolution_H__
 
#include "stir/ArrayFunctionObject_2ArgumentImplementation.h"
//#include "stir/VectorWithOffset.h"
 
START_NAMESPACE_STIR
 
template <typename elemT>
class VectorWithOffset;
 
template <typename elemT>
class ArrayFilter3DUsingConvolution : public ArrayFunctionObject_2ArgumentImplementation<3, elemT>
{
public:

  ArrayFilter3DUsingConvolution();
 
  ArrayFilter3DUsingConvolution(const Array<3, float>& filter_kernel);
 
  bool is_trivial() const override;
 
#if 0
  // commented out as it does not make sense to have a 1D IndexRange for a 2D filter
  virtual Succeeded get_influencing_indices(IndexRange<1>& influencing_indices, const IndexRange<1>& output_indices) const;
 
  virtual Succeeded get_influenced_indices(IndexRange<1>& influenced_indices, const IndexRange<1>& input_indices) const;
#endif
 
private:
  Array<3, float> filter_coefficients;
  void do_it(Array<3, elemT>& out_array, const Array<3, elemT>& in_array) const override;
  void do_it_2d(Array<2, elemT>& out_array, const Array<2, elemT>& in_array) const;
};
 
END_NAMESPACE_STIR
 
#endif // ArrayFilter3DUsingConvolution