morphology.py sample stub

samples/python2/morphology.py

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+import numpy as np
+import cv2
+
+img = cv2.imread('../cpp/baboon.jpg', False)
+
+def callback(k):
+    k = 2*(k-10)
+    st = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (abs(k), abs(k)))
+    op = cv2.MORPH_BLACKHAT
+    if k > 0:
+        op = cv2.MORPH_TOPHAT
+    res = cv2.morphologyEx(img, op, st)
+    cv2.imshow('img', res)
+
+callback(20)
+cv2.createTrackbar('k', 'img', 10, 20, callback)
+
+
+cv2.waitKey()