RampFilter.h

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//
//
/*
    Copyright (C) 2000 PARAPET partners
    Copyright (C) 2000- 2011, Hammersmith Imanet Ltd
 
    This file is part of STIR.
 
    SPDX-License-Identifier: Apache-2.0 AND License-ref-PARAPET-license
 
    See STIR/LICENSE.txt for details
*/
#ifndef __stir_FBP2D_RampFilter_H__
#define __stir_FBP2D_RampFilter_H__
 
#ifdef NRFFT
#  include "stir_experimental/Filter.h"
#else
#  include "stir/ArrayFilterUsingRealDFTWithPadding.h"
#  include "stir/TimedObject.h"
#endif
#include <string>
 
START_NAMESPACE_STIR
class RampFilter :
#ifdef NRFFT
    public Filter1D<float>
#else
    public ArrayFilterUsingRealDFTWithPadding<1, float>,
    public TimedObject
#endif
{
 
private:
  float fc;
  float alpha;
  float sampledist;
 
public:
  RampFilter(float sampledist_v, int length_v, float alpha_v = 1, float fc_v = .5);
 
  virtual std::string parameter_info() const;
};
 
END_NAMESPACE_STIR
 
#endif