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Proceedings Paper

Feature-based automatic configuration of semi-stationary multi-camera components
Author(s): Ann-Kristin Grosselfinger; David Münch; Wolfgang Hübner; Michael Arens
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Paper Abstract

Autonomously operating semi-stationary multi-camera components are the core modules of ad-hoc multi-view methods. On the one hand a situation recognition system needs overview of an entire scene, as given by a wide-angle camera, and on the other hand a close-up view from e.g. an active pan-tilt-zoom (PTZ) camera of interesting agents is required to further increase the information to e.g. identify those agents. To configure such a system we set the field of view (FOV) of the overview-camera in correspondence to the motor configuration of a PTZ camera. Images are captured from a uniformly moving PTZ camera until the entire field of view of the master camera is covered. Along the way, a lookup table (LUT) of motor coordinates of the PTZ camera and image coordinates in the master camera is generated. To match each pair of images, features (SIFT, SURF, ORB, STAR, FAST, MSER, BRISK, FREAK) are detected, selected by nearest neighbor distance ratio (NNDR), and matched. A homography is estimated to transform the PTZ image to the master image. With that information comprehensive LUTs are calculated via barycentric coordinates and stored for every pixel of the master image. In this paper the robustness, accuracy, and runtime are quantitatively evaluated for different features.

Paper Details

Date Published: 25 October 2013
PDF: 7 pages
Proc. SPIE 8896, Electro-Optical and Infrared Systems: Technology and Applications X, 88960P (25 October 2013); doi: 10.1117/12.2027311
Show Author Affiliations
Ann-Kristin Grosselfinger, Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung (Germany)
David Münch, Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung (Germany)
Wolfgang Hübner, Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung (Germany)
Michael Arens, Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung (Germany)


Published in SPIE Proceedings Vol. 8896:
Electro-Optical and Infrared Systems: Technology and Applications X
David A. Huckridge; Reinhard Ebert, Editor(s)

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