Abstract: Methods, apparatuses, systems, and computer readable media for managing a camera system. The camera system comprises at least a first camera and a second camera. In the method, a first position and a second position for a first object and a second object are obtained from the first and second cameras, respectively. The first and second objects are used for calibrating the camera system. After a movement of the first and second objects, a third position and a fourth position for the first and second objects are obtained from the first and second cameras, respectively. Here, a relative object position between the first and second objects remains unchanged during the movement. A relative camera position between the first and second cameras is determined based on the first, second, third, and fourth positions.