Optimisation of triangulation based optical profilometers utilising digital video projection technology
Fast, high precision and automated optical noncontact surface profile and shape measurement has been an extensively studied research area due to its many potential applications including 3D sensing, industrial monitoring, mechanical engineering, medicine, robotics, machine vision,animation, virtual reality, dressmaking, prosthetics, ergonomics. Among others, structured light approaches including fringe profilometry have proven to be one of the most promising techniques. In such profilometry techniques a structured light pattern, generally composed of parallel lines is projected onto a diffuse surface to be measured and viewed from an offset angle. The observed pattern is distorted by the object in such a way that represents information about the height of the object perpendicular to the plane of observation. The distorted structured light pattern is recorded, commonly by a CCD camera and through computer analysis of the recorded image the object can be recreated in 3D space, typically with a high degree of precision.
This article was originally published as: Baker, MJ, Xi, J, Chicharo, J, and Li, E, Optimisation of triangulation based optical profilometers utilising digital video projection technology, The 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS 2005), 23-27 October 2005, 551-552. Copyright IEEE 2005.