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

I. Hsien Chen*, Sheng-Jyh Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationVision Geometry XIV - Proceedings of SPIE-IS and T Electronic Imaging
DOIs
StatePublished - 17 Apr 2006
EventVision Geometry XIV - San Jose, CA, United States
Duration: 17 Jan 200618 Jan 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6066
ISSN (Print)0277-786X

Conference

ConferenceVision Geometry XIV
CountryUnited States
CitySan Jose, CA
Period17/01/0618/01/06

Keywords

  • Camera calibration
  • PTZ camera
  • Surveillance

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