Camera-based door position system
US11257247B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2019 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Oct 24, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/19604
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of determining a door state in a camera-based door position system according to one embodiment includes capturing, by a camera system, an image of a door lock secured to a door, wherein the door lock includes a thumbturn that is moveable between a first position corresponding to a locked state and a second position corresponding to an unlocked state, converting, by a processing system, the captured image to a grayscale image, generating, by the processing system, a door state image based on the grayscale image, and determining, by the processing system, a current door state of the door based on the door state image and a reference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.