Using Relative Orientation to Improve the Accuracy of Exterior Orientation Parameters of Low Cost POS

• Type: Article in International Scientific Journal
• Date: 2017-02

Authors

Américo Magalhães (Author) FCUP; Wenlin Yan (Author) FCUP; Luísa Bastos (Author) FCUP; Jose A Goncalves (Author) FCUP; Sérgio Madeira (Author) Other

Journal

Title: Photogrammetric Engineering and Remote Sensing

Vol. 83

Pages: 153-161

ISSN: 0099-1112

Publisher: American Society for Photogrammetry and Remote Sensing

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00M-MRT

DOI: 10.14358/pers.83.2.153

Abstract (EN): A simple and inexpensive POS for application to light airborne platforms was developed, and a modified Kalman Filtering was designed to integrate GNSS/IMU/Image data, which uses the relative orientation information to improve the accuracy of the exterior orientation parameters. The precise relative orientation of conjugate images was obtained using a SIFT/SFM matching algorithm. The relative exterior orientations were transformed from the camera frame to the navigation frame before they were used as external update information of the Kalman Filter. Combining all the relative orientation information retrieved from images, the Kalman Filter can give an improved output for the exterior orientation parameters. Airborne result from the tests of one straight strip shows that the heading accuracy of a GNSS/MEMS-IMU was improved from 0.26 degrees to 0.10 degrees, and the result from one closed strip shows that heading accuracy was improved from 1.11 degrees to 0.85 degrees and roll accuracy from 0.54 degrees to 0.43 degrees.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9