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Learning The Scene

Before the system attempts to locate people in a scene, it must learn the scene. To accomplish this Pfinder begins by acquiring a sequence of video frames that do not contain a person. Typically this sequence is relatively long, a second or more, in order to obtain a good estimate of the color covariance associated with each image pixel. For computational efficiency, color models are built in both the standard (Y,U,V) and brightness-normalized tex2html_wrap_inline683 color spaces.

Christopher R. Wren
Tue Feb 24 22:06:47 EST 1998