code: def HHIPreFilter(config={}):
      
  
      fil = numpy.array(
          [-4, 8, 25, -123, 230, 728, 230, -123, 25, 8, -4],
          dtype=numpy.float32).reshape((-1, 1, 1)) / numpy.float32(1000)
      resize = Resize(config=config)
      out_frame = Frame()
      out_frame.data = fil
      out_frame.type = 'fil'
      audit = out_frame.metadata.get('audit')
      audit += 'data = HHI pre-interlace filter\n'
      out_frame.metadata.set('audit', audit)
      resize.filter(out_frame)
      return resize
docs: HHI pre-interlace filter.
  
      A widely used prefilter to prevent line twitter when converting
      sequential images to interlace.
  
      Coefficients taken from: 'Specification of a Generic Format
      Converter', S. Pigeon, L. Vandendorpe, L. Cuvelier and B. Maison,
      CEC RACE/HAMLET Deliverable no R2110/WP2/DS/S/006/b1, September
      1995. http://www.stephanepigeon.com/Docs/deliv2.pdf