AttributeError: module 'cv2.cv2' has no attribute 'xfeatures2d'

[kayleeliyx]

## Flow ##
Sampled 522 frame pairs.
Resizing flow to (224, 384)
Traceback (most recent call last):
  File "main.py", line 20, in <module>
    dp.process()
  File "/home/ubuntu/Downloads/cvd2/process.py", line 234, in process
    return self.pipeline()
  File "/home/ubuntu/Downloads/cvd2/process.py", line 171, in pipeline
    self.compute_flow()
  File "/home/ubuntu/Downloads/cvd2/process.py", line 135, in compute_flow
    self.flow.compute_flow(frame_pairs, self.params.flow_model)
  File "/home/ubuntu/Downloads/cvd2/flow.py", line 124, in compute_flow
    optical_flow_homography.process(args)
  File "/home/ubuntu/Downloads/cvd2/optical_flow_homography.py", line 269, in process
    flow = infer(args, OFlowModel, DEVICE, im1, im2)
  File "/home/ubuntu/Downloads/cvd2/optical_flow_homography.py", line 177, in infer
    img1, img2, img2_reg, H_BA = getimage(img1_name, img2_name)
  File "/home/ubuntu/Downloads/cvd2/optical_flow_homography.py", line 149, in getimage
    (kpsA, featuresA) = detectAndDescribe(frame1)
  File "/home/ubuntu/Downloads/cvd2/optical_flow_homography.py", line 69, in detectAndDescribe
    descriptor = cv2.xfeatures2d.SURF_create()
 AttributeError: module 'cv2.cv2' has no attribute 'xfeatures2d'

>>> import cv2
>>> print(cv2.__version__)
4.5.2
>>> cv2.xfeatures2d.SURF_create()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'cv2.cv2' has no attribute 'xfeatures2d'

[kayleeliyx]

Personally, I found that this works for me:

pip install opencv-python==3.4.2.17

pip install opencv-contrib-python==3.4.2.17

[Jia-Bin Huang]

Thank you for letting us know the solution!

[Xuejian Rong]

Hey, the reason was actually mentioned in Colab: