def test_roberts_diagonal2():
"""Roberts' filter on a diagonal edge should be a diagonal line."""
image = np.rot90(np.tri(10, 10, 0), 3)
expected = ~np.rot90(np.tri(10, 10, -1).astype(bool) |
np.tri(10, 10, -2).astype(bool).transpose())
expected = _mask_filter_result(expected, None)
result = F.roberts(image).astype(bool)
assert_close(result, expected)
def test_roberts_diagonal1():
"""Roberts' on an edge should be a one diagonal"""
image = np.tri(10, 10, 0)
expected = ~(np.tri(10, 10, -1).astype(bool) | \
np.tri(10, 10, -2).astype(bool).transpose())
expected = _mask_filter_result(expected,None)
result = F.roberts(image).astype(bool)
assert_close(result,expected)
def test_roberts_diagonal2():
"""Roberts' on an edge should be a other diagonal"""
diagonal = np.tri(10, 10, 0,dtype=int)
rev_diagonal = np.rot90(diagonal.transpose(),1)
image = (rev_diagonal > 0).astype(float)
expected = ~np.rot90((np.tri(10, 10, -1).astype(bool) | \
np.tri(10, 10, -2).astype(bool).transpose()),1)
expected = _mask_filter_result(expected,None)
result = F.roberts(image).astype(bool)
assert_close(result,expected)
