Elevator passenger detector and door control system which masks portions of a hall image to determine motion and court passengers
US5387768A · kind A · utility
66Cited by
21References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Sep 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/188
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Passengers approaching an elevator are distinguished from other people standing in front of an elevator door by obtaining an image signal of an area in front of the elevator door and masking out of the image signal increasing with time greater portions thereof when no motion is indicated by the image signal for controlling door movement when motion is detected in an unmasked portion of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.