code: def test_gibbs_3d():
      image3d = np.zeros((6 * Nre, 6 * Nre, 2))
      image3d[:, :, 0] = image_gibbs
      image3d[:, :, 1] = image_gibbs
  
      image3d_cor = gibbs_removal(image3d, 2)
      assert_array_almost_equal(image3d_cor[:, :, 0], image_cor)
      assert_array_almost_equal(image3d_cor[:, :, 1], image_cor)
  
file_path: dipy/dipy/denoise/tests/test_gibbs.py
imports: import numpy
  from dipy.denoise.gibbs import _gibbs_removal_1d, _gibbs_removal_2d, gibbs_removal, _image_tv
  from numpy.testing import assert_, assert_array_almost_equal, assert_raises
label_desc: Use image node_id 5 for calling a global function with example usage: test_gibbs_3d() without return types