def test_morphsnakes_simple_shape_chan_vese():
img = gaussian_blob()
ls1 = disk_level_set(img.shape, center=(5, 5), radius=3)
ls2 = disk_level_set(img.shape, center=(5, 5), radius=6)
acwe_ls1 = morphological_chan_vese(img, num_iter=10, init_level_set=ls1)
acwe_ls2 = morphological_chan_vese(img, num_iter=10, init_level_set=ls2)
assert_array_equal(acwe_ls1, acwe_ls2)
assert acwe_ls1.dtype == acwe_ls2.dtype == np.int8
def test_morphsnakes_simple_shape_geodesic_active_contour():
img = np.float_(disk_level_set((11, 11), center=(5, 5), radius=3.5))
gimg = inverse_gaussian_gradient(img, alpha=10.0, sigma=1.0)
ls = disk_level_set(img.shape, center=(5, 5), radius=6)
ref = np.array(
[[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0], [0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0],
[0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0], [0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0],
[0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0], [0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0],
[0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]],
dtype=np.int8)
gac_ls = morphological_geodesic_active_contour(gimg,
iterations=10,
init_level_set=ls,
balloon=-1)
assert_array_equal(gac_ls, ref)
assert gac_ls.dtype == np.int8
def test_morphsnakes_iterations_kwarg_deprecation():
img = np.zeros((11, 11))
ls = disk_level_set(img.shape, center=(5, 5), radius=3)
ref_zeros = np.zeros(img.shape, dtype=np.int8)
ref_ones = np.ones(img.shape, dtype=np.int8)
with expected_warnings(["`iterations` is a deprecated argument"]):
acwe_ls = morphological_chan_vese(img, iterations=6, init_level_set=ls)
assert_array_equal(acwe_ls, ref_zeros)
with expected_warnings(["`iterations` is a deprecated argument"]):
gac_ls = morphological_geodesic_active_contour(img, iterations=6,
init_level_set=ls)
assert_array_equal(gac_ls, ref_zeros)
def test_morphsnakes_black():
img = np.zeros((11, 11))
ls = disk_level_set(img.shape, center=(5, 5), radius=3)
ref_zeros = np.zeros(img.shape, dtype=np.int8)
ref_ones = np.ones(img.shape, dtype=np.int8)
acwe_ls = morphological_chan_vese(img, num_iter=6, init_level_set=ls)
assert_array_equal(acwe_ls, ref_zeros)
gac_ls = morphological_geodesic_active_contour(img, num_iter=6,
init_level_set=ls)
assert_array_equal(gac_ls, ref_zeros)
gac_ls2 = morphological_geodesic_active_contour(img, num_iter=6,
init_level_set=ls,
balloon=1, threshold=-1,
smoothing=0)
assert_array_equal(gac_ls2, ref_ones)
assert acwe_ls.dtype == gac_ls.dtype == gac_ls2.dtype == np.int8
