Television – Special applications – Observation of or from a specific location
Reexamination Certificate
2005-09-27
2005-09-27
Philippe, Gims (Department: 2613)
Television
Special applications
Observation of or from a specific location
C348S155000, C382S173000
Reexamination Certificate
active
06950123
ABSTRACT:
Simultaneous tracking of multiple objects in a sequence of video frames captured by multiple cameras may be accomplished by extracting a foreground elements from a background in a frame, segmenting objects from the foreground surface, tracking objects within the frame, globally tracking positions of objects over time across multiple frames, fusing track data of objects obtained from multiple cameras to infer object positions, and resolving conflicts to estimate most likely object positions over time. Embodiments of the present invention improve substantially over existing trackers by including a technique for extraction of the region of interest that corresponds to a playing field, a technique for segmenting players from the field under varying illuminations, a template matching criteria that does not rely on specific shapes or color coherency of objects but on connected component properties, and techniques for reasoning about occlusions and consolidating tracking data from multiple cameras.
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Choi, et al., “Where are the ball and players?: Soccer Game Analysis with Color-based Tracking and Image Mosaick,” Paper, pp. 1-15, Dept. of EE, Pohang University of Science and Technology, Republic of Korea.
Intille, et al., “Closed-World Tracking,” IEEE, 1995, pp. 672-678, USA.
Isard, et al., “A Mixed-State Condensation Tracker with Automatic Model-Switching,” Paper, pp. 107-112, University of Oxford, England.
Philippe Gims
Skabrat Steve P.
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