code: def test_explore():
      I = make_xyz_image(make_data_int16(), dummy_affine, "scanner")
      J = make_xyz_image(make_data_int16(), dummy_affine, "scanner")
      R = HistogramRegistration(I, J)
      T = Affine()
      simi, params = R.explore(T, (0, [-1, 0, 1]), (1, [-1, 0, 1]))
  
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 26 for calling a global function with example usage: test_explore() without return types