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Proceedings Paper

Automatic inference of geometric camera parameters and inter-camera topology in uncalibrated disjoint surveillance cameras
Author(s): Richard J. M. den Hollander; Henri Bouma; Jan Baan; Pieter T. Eendebak; Jeroen H. C. van Rest
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Paper Abstract

Person tracking across non-overlapping cameras and other types of video analytics benefit from spatial calibration information that allows an estimation of the distance between cameras and a relation between pixel coordinates and world coordinates within a camera. In a large environment with many cameras, or for frequent ad-hoc deployments of cameras, the cost of this calibration is high. This creates a barrier for the use of video analytics. Automating the calibration allows for a short configuration time, and the use of video analytics in a wider range of scenarios, including ad-hoc crisis situations and large scale surveillance systems. We show an autocalibration method entirely based on pedestrian detections in surveillance video in multiple non-overlapping cameras. In this paper, we show the two main components of automatic calibration. The first shows the intra-camera geometry estimation that leads to an estimate of the tilt angle, focal length and camera height, which is important for the conversion from pixels to meters and vice versa. The second component shows the inter-camera topology inference that leads to an estimate of the distance between cameras, which is important for spatio-temporal analysis of multi-camera tracking. This paper describes each of these methods and provides results on realistic video data.

Paper Details

Date Published: 21 October 2015
PDF: 15 pages
Proc. SPIE 9652, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XI; and Optical Materials and Biomaterials in Security and Defence Systems Technology XII, 96520D (21 October 2015); doi: 10.1117/12.2194435
Show Author Affiliations
Richard J. M. den Hollander, TNO (Netherlands)
Henri Bouma, TNO (Netherlands)
Jan Baan, TNO (Netherlands)
Pieter T. Eendebak, TNO (Netherlands)
Jeroen H. C. van Rest, TNO (Netherlands)


Published in SPIE Proceedings Vol. 9652:
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XI; and Optical Materials and Biomaterials in Security and Defence Systems Technology XII
Roberto Zamboni; Douglas Burgess; Gari Owen; François Kajzar; Attila A. Szep; Harbinder Rana, Editor(s)

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