add missing import of ellipse in morphology module (#968)

`cucim.skimage.morphology.footprints.ellipse` should also be available via `cucim.skimage.morphology.ellipse` like the other footprints

Authors:
  - Gregory Lee (https://github.com/grlee77)

Approvers:
  - https://github.com/jakirkham

URL: #968

Author: grlee77

python/cucim/src/cucim/skimage/morphology/__init__.py

@@ -19,6 +19,7 @@
     ball,
     diamond,
     disk,
+    ellipse,
     footprint_from_sequence,
     footprint_rectangle,
     octagon,
@@ -63,6 +64,7 @@
     "footprint_rectangle",
     "diamond",
     "disk",
+    "ellipse",
     "octahedron",
     "ball",
     "octagon",

python/cucim/src/cucim/skimage/morphology/tests/test_footprints.py

@@ -15,10 +15,19 @@
 from cupy.testing import assert_array_equal
 
 from cucim.skimage._shared.testing import assert_stacklevel, fetch
+
+# also test that import from top-level morphology namespace work
 from cucim.skimage.morphology import (
+    ball,
+    diamond,
+    disk,
+    ellipse,
     footprint_from_sequence,
     footprint_rectangle,
     footprints,
+    octagon,
+    octahedron,
+    star,
 )
 
 
@@ -146,14 +155,14 @@ def test_footprint_star(self):
 @pytest.mark.parametrize(
     "function, args, supports_sequence_decomposition",
     [
-        (footprints.disk, (3,), True),
-        (footprints.ball, (3,), True),
-        (footprints.diamond, (3,), True),
-        (footprints.octahedron, (3,), True),
+        (disk, (3,), True),
+        (ball, (3,), True),
+        (diamond, (3,), True),
+        (octahedron, (3,), True),
         (footprint_rectangle, ((3, 5),), True),
-        (footprints.ellipse, (3, 4), False),
-        (footprints.octagon, (3, 4), True),
-        (footprints.star, (3,), False),
+        (ellipse, (3, 4), False),
+        (octagon, (3, 4), True),
+        (star, (3,), False),
     ],
 )
 @pytest.mark.parametrize("dtype", [np.uint8, np.float64])