Method of presence detection using video input

Details Method of presence detection using video input Method of presence detection using video input

1996-12-23

1999-04-06

Shalwala, Bipin

Image analysis

Image transformation or preprocessing

Measuring image properties

382103, 382220, 382283, 348152, 348154, G06K 936, G06K 900, G06K 968, G06K 920

Patent

active

058928561

ABSTRACT:
A method of detecting whether a user is in close proximity to an end point. A base video frame of the end point is captured when the user is not in close proximity to the end point. A current video frame of the end point is captured and compared to the base video frame of the end point to determine whether the user is in close proximity to the end point.

REFERENCES:
patent: 5034986 (1991-07-01), Karmann et al.
patent: 5243418 (1993-09-01), Kuno et al.
patent: 5253070 (1993-10-01), Hong
patent: 5280530 (1994-01-01), Trew et al.
patent: 5339104 (1994-08-01), Hong
patent: 5438360 (1995-08-01), Edwards
patent: 5550928 (1996-08-01), Lu et al.
U.S. Application No. 08/725,215, entitled "A Mechanism for Increasing Awareness and Sense of Proximity Among Multiple Users in a Network Systems, " filed Sep. 26,1996, attorney docket no. 42390.P3478.

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