Method and device for electronic image capture in several zones
US7330603B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Mar 23, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/68
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to electronic image capture by an image sensor divided into several zones. To compensate for the inevitable differences between processing pathways arising from the various zones, there is provided a digital correction table inserted into one of the processing pathways. This table stores a corrected level for each level of image signal, the corrected level compensating for the difference with the other processing pathway for this signal level. The content of the table is update dynamically on the basis of observation of the actual images viewed by the sensor. A convergent algorithm is described, making it possible to correct the whole table on the basis of the observation of two border points, then to redo corrections on the whole table on the basis of the analysis of other border points of the same image or of subsequent images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.