AttributeError: 'module' object has no attribute 'xfeatures2d' [Python/OpenCV 2.4]

Question

This line:

sift = cv2.xfeatures2d.SIFT_create()

return error:

Traceback (most recent call last):
  File \"C:/Python27/openC         


        

Answer 1

This error may also occur in OpenCV 3+ as it is caused by mismatched versions of OpenCV and OpenCV-Contrib package.

I had OpenCV version 3.4.1 and OpenCV-Contrib version 3.4.0. I tried the following with OpenCV-Contrib:

Uninstall OpenCV-Contrib package:

$ pip uninstall opencv-contrib-python

Then install the same again:

$ pip install opencv-contrib-python

The pip automatically fetches and installs the latest compatible version.