Title

Practical Ptz Camera Calibration Using Givens Rotations

Keywords

Camera calibration; Givens rotations; Pan-tilt-zoom camera

Abstract

Due to their ease of use and availability, pan-tilt-zoom (PTZ) cameras are everywhere. However, in order to utilize these cameras for a meaningful application, it is necessary that these cameras be calibrated. In this paper, we address the problem of calibrating such a rotating and zooming camera and present a simple yet novel solution. We show that in the case of a general rotation the problem can be solved in closed-form by applying a series of Givens rotations, providing five intrinsic parameters from only a minimum set of two images. Whereas other methods use orthogonality of the rotation matrix as a constraint, our approach applies direct decomposition of the infinite homography. As a result, we are able to obtain four constraints for estimating camera parameters. We rigourously test our method on synthetic data by introducing very large noise. We also compare our method with the state-of-the-art PTZ camera calibration method. Our solutions and analysis are thoroughly validated on both synthetic and real data. © 2008 IEEE.

Publication Date

12-1-2008

Publication Title

Proceedings - International Conference on Image Processing, ICIP

Number of Pages

1936-1939

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/ICIP.2008.4712160

Socpus ID

69949134496 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/69949134496

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