ModifiedInverseAverigingArrayFilter.h

Go to the documentation of this file.

//
// $Id:
//
/*
    Copyright (C) 2000- 2001, IRSL
    SPDX-License-Identifier: Apache-2.0
    See STIR/LICENSE.txt for details
*/

#ifndef __stir_ModifiedInverseAverigingArrayFilter_H__
#define __stir_ModifiedInverseAverigingArrayFilter_H__

#include "stir/DiscretisedDensity.h"
#include "stir/SeparableArrayFunctionObject.h"
#include "stir_experimental/SeparableLowPassArrayFilter2.h"
#include "stir/Array.h"
#include "stir/IndexRange.h"

START_NAMESPACE_STIR

class FFT_routines
{
public:
  void find_fft_filter(Array<1, float>& filter_coefficients);
  void find_fft_unity(Array<1, float>& unity);

private:
  Array<1, float> filter_coefficients;
  Array<1, float> unity;
};

template <int num_dimensions, typename elemT>
class ModifiedInverseAverigingArrayFilter : public SeparableLowPassArrayFilter2<num_dimensions, elemT>
// public SeparableArrayFunctionObject <num_dimensions,elemT>
{
public:
  ModifiedInverseAverigingArrayFilter();

  // ModifiedInverseAverigingArrayFilter(const float kapa0_over_kapa1);

  ModifiedInverseAverigingArrayFilter(const VectorWithOffset<elemT>& filter_coefficients, const float kapa0_over_kapa1);

  // temporary (?) member
  IndexRange<num_dimensions> get_kernel_index_range() const { return kernel_index_range; }

private:
  VectorWithOffset<float> filter_coefficients;
  IndexRange<num_dimensions> kernel_index_range;
  float kapa0_over_kapa1;
};

END_NAMESPACE_STIR

#endif