Method of presence detection using video input
US5892856A · kind A · utility
56Cited by
7References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/22
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.