Abstract

Abstract — A structured light vision system using pattern projection is useful for robust reconstruction of 3D objects. One of the major tasks in using such a system is the calibration of the sensing system. This paper presents a new method by which a 2DOF structured light system can be automatically recalibrated, if and when the relative pose between the camera and the projector is changed. A distinct advantage of this method is that neither an accurately designed calibration device nor the prior knowledge of the motion of the camera or the scene is required. Several important cues for self-recalibration, including geometrical cue, illumination cue, and focus cue, are explored. The sensitivity analysis shows that high accuracy in depth value can be achieved with this calibration method. Some experimental results are presented to demonstrate the calibration technique. Index Terms--Structured light system, active vision, recalibration, pattern projection, 3D reconstruction.

Citations