Hi everyone!
I'm trying to program a python app that determine the position and orientation of an aruco marker. I calibrated the camera and everything and I used aruco.estimatePoseSingleMarkers that returns the translation and rotation vectors. The translation vector works fine but I don't understand how the rotation vector works. I took some picture to illustrate my problem with the "roll rotation":
Here the rotation vector is approximately [in degree]: [180 0 0]
Here the rotation vector is approximately [in degree]: [123 -126 0]
And here the rotation vector is approximately [in degree]: [0 -180 0]
And I don't see the logic in these angles. I've tried the other two rotations (pitch and yaw) and there appear also "random". So if you have an explication I would be very happy :)