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Issue No. 11 - November (2005 vol. 27)
ISSN: 0162-8828
pp: 1838-1842
We propose an extension of parametric active contours designed to track nonoccluding objects transiently touching each other, a task where both parametric and single level set-based methods usually fail. Our technique minimizes a cost functional that depends on all contours simultaneously and includes a penalty for contour overlaps. This scheme allows us to take advantage of known constraints on object topology, namely, that objects cannot merge. The coupled contours preserve the identity of previously isolated objects during and after a contact event, thus allowing segmentation and tracking to proceed as desired.
Index Terms- Segmentation, tracking, active contours, topology, 2D video.

C. Zimmer and J. Olivo-Marin, "Coupled Parametric Active Contours," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 27, no. , pp. 1838-1842, 2005.
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