opencv to bob conversion fix?

bob/ip/stereo/utils.py

@@ -6,14 +6,14 @@ import cv2 as cv
 def convert_bob_to_cv(img):
     assert len(img.shape) == 3
     assert img.shape[0] == 3
-    img = np.rollaxis(img, 2)
+    img = np.moveaxis(img, 0, -1)
     img = np.flip(img, axis=2)
     return img
 
 def convert_cv_to_bob(img):
     assert len(img.shape) == 3
     assert img.shape[2] == 3
-    img = np.rollaxis(img, 2)
+    img = np.moveaxis(img, 2, 0)
     img = np.flip(img, axis=0)
     return img