Pfinder: real-time tracking of the human body
Christopher R. Wren, Ali J. Azarbayejani, Trevor J. Darrell, Alex Pentland · IEEE Transactions on Pattern Analysis and Machine Intelligence · 1997
Pfinder is a real-time system for tracking people and interpreting their behavior. It runs at 10 Hz 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.