CV2 — check version
$ python
>>> import cv2
>>> cv2.__version__
‘3.0.0’
Reference: http://www.pyimagesearch.com/2015/08/10/checking-your-opencv-version-using-python/
TypeError: Required argument ‘outImg’ (pos 6) not found
Set outImg to be none.
img3 = cv2.drawMatchesKnn(img1,kp1,img2,kp2,matches,None,flags=2)reference: http://stackoverflow.com/questions/31631352/typeerror-required-argument-outimg-pos-6-not-found/31631995#31631995
Lingyu Zhang 