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Proceedings Paper

Database verification using an imaging sensor
Author(s): Philippe Simard; Frank P. Ferrie
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Paper Abstract

In aviation, synthetic vision systems produce artificial views of the world to support navigation and situational awareness in poor visibility conditions. Synthetic images of local terrain are rendered from a database and registered through the aircraft navigation system. Because the database reflects, at best, a nominal state of the environment, it needs to be verified to ensure its consistency with reality. This paper presents a technique for real-time verification of databases using a single imaging device, of any type. It is differential and as such, requires motion of the sensor. The geometric information of the database is used to predict how the sensor image should change. If the measured change is different from the predicted change, the database geometry is assumed to be incorrect. Geometric anomalies are localized and their severity is estimated in absolute terms using a minimization process. The technique is tested against real flight data acquired by an helicopter to verify a database consisting of a digital elevation map. Results show that geometric anomalies can be detected and that their location and importance can be evaluated.

Paper Details

Date Published: 16 July 2002
PDF: 8 pages
Proc. SPIE 4713, Enhanced and Synthetic Vision 2002, (16 July 2002); doi: 10.1117/12.474431
Show Author Affiliations
Philippe Simard, McGill Univ. (Canada)
Frank P. Ferrie, McGill Univ. (Canada)

Published in SPIE Proceedings Vol. 4713:
Enhanced and Synthetic Vision 2002
Jacques G. Verly, Editor(s)

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