AttributeError: 'module' object has no attribute 'ORB'
I found this also. I checked the actual contents of the cv2 module and found ORB_create() rather than ORB()
Use the line
orb = cv2.ORB_create()instead of orb = cv2.ORB() and it will work.
Verified on Python 3.4, OpenCV 3 on Windows, using the OpenCV test data set box.png and box_in_scene.png with the following results. Note you have to put in None for outImg in the line img3 = cv2.drawMatches(img1,kp1,img2,kp2,matches[:10], flags=2) also - see my answer to your other question.
