ArrayFilter2DUsingConvolution.h

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//
//
/*
    Copyright (C) 2000- 2002, IRSL
    See STIR/LICENSE.txt for details
*/

#ifndef __stir_ArrayFilter2DUsingConvolution_H__
#define __stir_ArrayFilter2DUsingConvolution_H__

#include "stir/ArrayFunctionObject_2ArgumentImplementation.h"
//#include "stir/VectorWithOffset.h"

START_NAMESPACE_STIR

template <typename elemT>
class VectorWithOffset;

template <typename elemT>
class ArrayFilter2DUsingConvolution : public ArrayFunctionObject_2ArgumentImplementation<2, elemT>
{
public:

  ArrayFilter2DUsingConvolution();

  ArrayFilter2DUsingConvolution(const Array<2, 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<2, float> filter_coefficients;
  void do_it(Array<2, elemT>& out_array, const Array<2, elemT>& in_array) const override;
};

END_NAMESPACE_STIR

#endif // ArrayFilter2DUsingConvolution