code: def test_scale():
      # Smoke test?
      a = rft.IntrinsicVolumes([2, 3, 4])
      b = rft.scale_space(a, [3, 4], kappa=0.5)
  
imports: import numpy
  import scipy.stats
  from scipy.special import gammaln, hermitenorm
  import pytest
  from numpy.testing import assert_almost_equal
  from ..None import rft
label_desc: Use image node_id 26 for calling a global function with example usage: test_scale() without return types