Automatic Recalibration of the Relative Pose in a Structured Light System

In this paper, we present a new method for automatic recalibration of the relative pose in a structured light system by a single image of planar surface. Assuming that the intrinsic parameters of the camera and the projector are known from initial calibration, we show that their relative orientation and position can be determined automatically from four projection correspondences in an image and a projection plane. In this method, two steps are taken to solve the pose problem. The advantages are that not only the analytic solutions can be obtained easily but also an over constraint system is constructed in each step to increase the robustness. Some computer simulations and real data experiments have been carried out to validate our method