Multiple backgrounds
US6819353B2 · kind B2 · utility
4Cited by
13References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Dec 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/188
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for monitoring a monitored area comprising the steps of recording an image of the monitored area and of comparing the recorded image with a reference image in order to determine whether there is an alarm situation. The method further comprises the step of creating the reference image by combining at least two previously stored images from a set of images, so that the lighting conditions in the reference image are adjusted to the lighting conditions in the recorded image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.