pythonopencvaruco

How to get Aruco pose estimation in OpenCV Python?

I'm following this tutorial on getting started with aruco markers.

I want to get the pose estimation frame axis and display it ontop of the aruco marker like so:

enter image description here

Here is the relevant code snippet from the tutorial:

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    detector = cv2.aruco.ArucoDetector(arucoDict, arucoParams)
        (corners, ids, rejected) = detector.detectMarkers(gray)
    
    if len(corners) > 0:
        for i in range(0, len(ids)):
        
        rvec, tvec, markerPoints = cv2.aruco.estimatePoseSingleMarkers(corners[i], 0.02, mtx, dist)
        cv2.drawFrameAxes(frame, mtx, dist, rvec, tvec, 0.02)

But I get the following attributional error:

AttributeError: module 'cv2.aruco' has no attribute 'estimatePoseSingleMarkers'

My python version: 3.11.2 OpenCV version: 4.7.0

How do I get the pose and draw them in the aruco marker?

Solution

  • Installing an older version of opencv-contrib-python solves the issue.

    pip install opencv-contrib-python==4.6.0.66

    You might have to uninstall existing opencv and opencv-contrib-python before that to avoid conflicts: Python opencv Aruco "No module named 'cv2.aruco'"

    So,

    pip uninstall opencv-python -y
pip uninstall opencv-contrib-python -y

    followed by

     pip install opencv-contrib-python==4.6.0.66

    should work.

    You can look into the latest build for any changes: https://github.com/opencv/opencv-python