Salient point region covariance descriptor for target tracking

Features extracted at salient points are used to construct a region covariance descriptor (RCD) for target tracking. In the classical approach, the RCD is computed by using the features at each pixel location, which increases the computational cost in many cases. This approach is redundant because i...

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Bibliographic Details
Published in:Optical engineering 2013-02, Vol.52 (2), p.027207-027207
Main Authors: Cakir, Serdar, Aytaç, Tayfun, Yildirim, Alper, Beheshti, Soosan, Gerek, Ö. Nezih, Cetin, A. Enis
Format: Article
Language:English
Subjects:
Computational efficiency
Covariance
Pixels
Statistics
Target tracking
Tracking
Tracking (position)
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Summary:Features extracted at salient points are used to construct a region covariance descriptor (RCD) for target tracking. In the classical approach, the RCD is computed by using the features at each pixel location, which increases the computational cost in many cases. This approach is redundant because image statistics do not change significantly between neighboring image pixels. Furthermore, this redundancy may decrease tracking accuracy while tracking large targets because statistics of flat regions dominate region covariance matrix. In the proposed approach, salient points are extracted via the Shi and Tomasi's minimum eigenvalue method over a Hessian matrix, and the RCD features extracted only at these salient points are used in target tracking. Experimental results indicate that the salient point RCD scheme provides comparable and even better tracking results compared to a classical RCD-based approach, scale-invariant feature transform, and speeded-up robust features-based trackers while providing a computationally more efficient structure.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.OE.52.2.027207