A vision-based approach to extracting the tilt angle and altitude of a PTZ camera

I-Hsien Chen; Sheng-Jyh Wang

doi:10.1117/12.642296

18 January 2006 A vision-based approach to extracting the tilt angle and altitude of a PTZ camera

I-Hsien Chen, Sheng-Jyh Wang

Proceedings Volume 6066, Vision Geometry XIV; 606609 (2006) https://doi.org/10.1117/12.642296
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

In this paper, the relationship between the tilt angle and altitude of a PTZ camera and the 3D-to-2D coordinate transformation is built. A vision-based approach is then proposed to accomplish the estimation of tilt angle and altitude based on the observation of some simple objects lying on a horizontal plane, with known intrinsic parameters of the PTZ camera. The patterns could be a circle, a corner with known angle, more than two corners with unknown but equal angles, or more than two line segments with unknown but equal lengths. Furthermore, if we are given a few line segments with known but not necessarily equal length, the estimation of tilt angle and altitude can also be achieved via an optimization procedure. The impacts of parameter fluctuations are analyzed via computer simulations. Experimental results on real images conform to our analysis and demonstrate the efficiency of this approach.

Citation Download Citation

I-Hsien Chen and Sheng-Jyh Wang "A vision-based approach to extracting the tilt angle and altitude of a PTZ camera", Proc. SPIE 6066, Vision Geometry XIV, 606609 (18 January 2006); https://doi.org/10.1117/12.642296

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