期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 5
页码：575-580
出版社：Copernicus Publications
摘要：This paper presents a novel optical indoor positioning system that is currently under development at the Institute of Geodesy and Photogrammetry at the ETH Zurich. The aim of the project is to develop an automatic, inexpensive method capable of providing continuous sub-mm positions in real-time from a mobile device in all indoor environments. The system architecture does not require cost-intensive high-precision mechanics or sophisticated set-ups. The main purpose of the system called CLIPS (Camera and Laser based Indoor Positioning System) is the precise pose determination of a mobile camera. The difference to the photogrammetric relative camera orientation is that it is based on the principle of an inverse camera, where one camera is substituted for a device that emits laser-beams from a virtual central point. The laser beams project bright spots on any surface in an indoor environment. These laser spots are seen by a camera for the determination of its relative orientation with respect to the laser-device. First experiments have shown that the relative orientation of the camera could be correctly determined in all cases and that the new system has the potential to achieve mm-level accuracy or better. However, the overall system performance has been limited so far due to an imprecise determination of the system-scale
关键词：Relative Camera Orientation; P oint Algorithm; Inverse Camera Principle; Indoor Positioning System
