plane normal vector

[nesi73]

Hi,

I don't understand how you select the plane normal with this: [0,1,0] instead of [0,0,1] like in the OpenCV example.

Plane normal vector at camera 1 coordinate. here, object axis -> camera frame.

n = np.array([0, 1, 0]).reshape((3, 1))

Thank you

[mzki]

Hi,

My example assumes the XZ-plane of the object coordinates is parallel to the plane, which is align to the ground. So the plane normal vector of my example is [0,1,0] (note that the sign of normal vector is inverted to align the OpenCV example ). In contrast, It seems the OpenCV example assumes the XZ-plane of the object coordinates is orthogonal to the plane. So the plane normal vector of the OpenCV example is [0,0,1], (see solvePnP result of the chessboard in the OpenCV example).