
US Patent No: 5,892,856
Number of patents in Portfolio can not be more than 2000
Method of presence detection using video input
Stats
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Apr 6, 1999
Issued date -
Dec 23, 1996
filing date -
08/772,644
serial no -
Expired
status
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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.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,253,070 System and method for automatically detecting a variation of video information | 23 | 1991 | |
| 5,339,104 Motion detecting apparatus | 28 | 1992 | |
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| 5,243,418 Display monitoring system for detecting and tracking an intruder in a monitor area | 120 | 1991 | |
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| 5,438,360 Machine vision camera and video reprocessing system | 21 | 1994 | |
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| 5,550,928 Audience measurement system and method | 147 | 1992 | |
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| 5,034,986 Method for detecting and tracking moving objects in a digital image sequence having a stationary background | 132 | 1990 | |
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| 5,280,530 Method and apparatus for tracking a moving object | 194 | 1991 | |