Method and apparatus for monitoring a passageway using 3D images
US7397929B2 · kind B2 · utility
22Cited by
33References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2003 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Oct 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30241
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stereo imaging based vision system is calibrated to provide heights above the ground plane for any point in the field of view. Therefore, when any object enters the field of view, it generates interest points called “features,” the heights of which are measured relative to the ground plane. These points are then clustered in 3D space to provide “objects.” These objects are then tracked in multiple frames to provide “trajectories.” Such a system could then control alarm signals or actuate gates or motion control devices, for example, based on the various pieces of information generated about the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.