def default_init_params(output_min, output_max):
  """Returns default initialization bounds depending on layer output bounds.

  Args:
    output_min: None or minimum layer output.
    output_max: None or maximum layer output.
  """
  if output_min is None and output_max is None:
    return 0.5, 1.5
  else:
    return 0.0, 1.0