code: def test_correlation_coefficient():
      _test_similarity_measure("cc", 1.0)
  
imports: import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from ....core.image.image_spaces import make_xyz_image
  from ....testing import assert_almost_equal
  from .._registration import _joint_histogram
  from ..affine import Affine, Rigid
  from ..histogram_registration import HistogramRegistration
label_desc: Use image node_id 16 for calling a global function with example usage: test_correlation_coefficient() without return types