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Proceedings Paper

Photogrammetric bridging of GPS outages in mobile mapping
Author(s): Riccardo Roncella; Fabio Remondino; Gianfranco Forlani
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Paper Abstract

A photogrammetric strategy for the orientation of image sequences acquired by Mobile Mapping Vehicles (MMV) is presented. The motivations for this are twofold: to allow image georeferencing in short GPS outages for the MMV under development at the University of Parma, currently lacking an IMU; to improve the consistency of image georeferencing between asynchronous frames. The method may also contribute to limit the drift errors of low-cost integrated IMU/GPS systems in GPS outages. Drawing on techniques developed for structure and motion (S&M) reconstruction from image sequences and accounting for the specific conditions of the MMV imaging geometry, highly reliable multi-image matches are found, refining image orientation with a final bundle adjustment. Dealing with scenes with poor image texture and the automation of the convergence of the bundle to the solution are still problems. After successfully orienting image sequences up to about 200 m long, the accuracy of the orientation and reconstruction process was checked in a test field. Although not all constraints between synchronous image pairs are yet enforced, the accuracy degradation along the sequence was found to be still well within the specifications for the MMV. Furthermore curved path and possible solution to the poorness of tracked points are investigated.

Paper Details

Date Published: 17 January 2005
PDF: 12 pages
Proc. SPIE 5665, Videometrics VIII, 56650W (17 January 2005); doi: 10.1117/12.587843
Show Author Affiliations
Riccardo Roncella, Univ. degli Studi di Parma (Italy)
Fabio Remondino, Swiss Federal Institute of Technology Zurich (Switzerland)
Gianfranco Forlani, Univ. degli Studi di Parma (Italy)

Published in SPIE Proceedings Vol. 5665:
Videometrics VIII
J.-Angelo Beraldin; Sabry F. El-Hakim; Armin Gruen; James S. Walton, Editor(s)

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