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;

  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;

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