Database verification using an imaging sensor

Philippe Simard; Frank P. Ferrie

doi:10.1117/12.474431

16 July 2002 Database verification using an imaging sensor

Philippe Simard, Frank P. Ferrie

Proceedings Volume 4713, Enhanced and Synthetic Vision 2002; (2002) https://doi.org/10.1117/12.474431
Event: AeroSense 2002, 2002, Orlando, FL, United States

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.

Citation Download Citation

Philippe Simard and Frank P. Ferrie "Database verification using an imaging sensor", Proc. SPIE 4713, Enhanced and Synthetic Vision 2002, (16 July 2002); https://doi.org/10.1117/12.474431

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