ModifiedInverseAverigingArrayFilter.h

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//
// $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