def _shrink_level_to_arg(level):
  """Converts level to ratio by which we shrink the image content."""
  if level == 0:
    return (1.0,)  # if level is zero, do not shrink the image
  # Maximum shrinking ratio is 2.9.
  level = 2. / (_MAX_LEVEL / level) + 0.9
  return (level,)
Converts level to ratio by which we shrink the image content.
inference_api/src/main/object_detection/utils/autoaugment_utils.py