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<p><b>Abstract</b>—Pfinder is a real-time system for tracking people and interpreting their behavior. It runs at 10Hz on a standard SGI Indy computer, and has performed reliably on thousands of people in many different physical locations. The system uses a multiclass statistical model of color and shape to obtain a 2D representation of head and hands in a wide range of viewing conditions. Pfinder has been successfully used in a wide range of applications including wireless interfaces, video databases, and low-bandwidth coding.</p>
Blobs, blob tracking, real-time, person tracking, 3D person tracking, segmentation, gesture recognition, mixture model, MDL.

T. Darrell, A. P. Pentland, A. Azarbayejani and C. R. Wren, "Pfinder: Real-Time Tracking of the Human Body," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 19, no. , pp. 780-785, 1997.
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