Dynamic Recalibration of an Active Vision System via Generic Homography

Active vision systems are widely used for 3D reconstruction. However, they normally have to be calibrated before vision tasks. In this paper, we present a novel method for dynamic recalibration for a structured light vision system. Given a single image in the scene, a closed-form solution for the pose of the camera is derived by enforcing the constraints via its generic Homography. Then 3D reconstruction can be performed immediately even when the system is displaced or its configuration is changed. Experiments have been carried out and satisfactory results are obtained by evaluating dimensional measurements and back-projection errors.