Intrusion detection and tracking with pan-tilt cameras
Intrusion detection and tracking with pan-tilt cameras
- Author(s): A. Biswas ; P. Guha ; A. Mukerjee ; K.S. Venkatesh
- DOI: 10.1049/cp:20060593
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- Author(s): A. Biswas ; P. Guha ; A. Mukerjee ; K.S. Venkatesh Source: IET International Conference on Visual Information Engineering (VIE 2006), 2006 p. 565 – 571
- Conference: IET International Conference on Visual Information Engineering (VIE 2006)
- DOI: 10.1049/cp:20060593
- ISBN: 0 86341 671 3
- Location: Bangalore, India
- Conference date: 26-28 Sept. 2006
- Format: PDF
The use of autonomous pan-tilt cameras as opposed to static cameras can dramatically enhance the range and effectiveness of surveillance systems, but effective tracking in such pan-tilt scenarios remains a challenge. Existing approaches for constructing mosaiced background models require accurate camera motion parameters, and online updates for the background model in the presence of scene activity, as well as real-time tracking of targets in the presence of partial occlusions have not been solved. In this paper we propose a model that requires no camera motion parameters, the background is learned online, and the solution is integrated with target tracking. Camera egomotion is estimated as the dominant cluster mean for a mixture of Gaussians learned over point correlations between consecutive frames. Putative target regions are detected as changes over the learned background model GMM mosaic. In scenes involving multiple agents, a particular target is identified based on pre-defined appearance priors, and this target is kept in the image center as it moves in the scene, occasionally encountering occlusions. The camera pan-tilt control is achieved using dynamic error expectation to drive proportional-integral action. Results (validated ROC curves against hand-groundtruthed data) are presented from different imaging and task conditions.
Inspec keywords: Gaussian processes; video surveillance; video cameras; attitude control; target tracking
Subjects: Image recognition; Other topics in statistics; Other topics in statistics; Video recording; Video signal processing; Spatial variables control; Image recognition
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