Method and apparatus for measuring dwell time of objects in an environment
US7167576B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2002 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Feb 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2013/0081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for tracking objects entering and exiting an environment comprises providing stereo vision cameras positioned proximate to the paths to enter the environment, such that the stereo vision fields associated with the cameras substantially cover the paths. Using image data obtained by the stereo vision cameras, entry signatures are determined for objects entering the environment and exit signatures are obtained for objects exiting the environment. At any time after the determination of at least one exit signature, exit signatures are matched with the set of available entry signatures. Matching may be performed according to a variety of techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.