Do not monkey-patch cv2 methods for unaware caller (#11210)

utils/general.py

@@ -1135,6 +1135,7 @@ def imshow(path, im):
     imshow_(path.encode('unicode_escape').decode(), im)
 
 
-cv2.imread, cv2.imwrite, cv2.imshow = imread, imwrite, imshow  # redefine
+if Path(inspect.stack()[0].filename).parent.parent.as_posix() in inspect.stack()[-1].filename:
+    cv2.imread, cv2.imwrite, cv2.imshow = imread, imwrite, imshow  # redefine
 
 # Variables ------------------------------------------------------------------------------------------------------------