def test_connect_regions():
try:
face = sp.face(gray=True)
except AttributeError:
# Newer versions of scipy have face in misc
from scipy import misc
face = misc.face(gray=True)
for thr in (50, 150):
mask = face > thr
graph = img_to_graph(face, mask)
assert_equal(ndimage.label(mask)[1], connected_components(graph)[0])
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