<commit_before>import numpy as np
cimport numpy as np
import cython

"""
See also:

  <NAME> and <NAME>,
  "Two linear time Union-Find strategies for image processing",
  Theoretical Computer Science 154 (1996), pp. 165-181.

  <NAME>, <NAME> and <NAME>,
  "Optimizing connected component labeling algorithms",
  Paper LBNL-56864, 2005,
  Lawrence Berkeley National Laboratory<commit_msg>Remove unnecessary import of "cython".<commit_after>import numpy as np
cimport numpy as np

"""
See also:

  <NAME> and <NAME>,
  "Two linear time Union-Find strategies for image processing",
  Theoretical Computer Science 154 (1996), pp. 165-181.

  <NAME>, <NAME> and <NAME>,
  "Optimizing connected component labeling algorithms",
  Paper LBNL-56864, 2005,
  Lawrence Berkeley National Laboratory
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