Method of processing the black level of a pixel matrix of an image sensor, and corresponding sensor
US7391449B2 · kind B2 · utility
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11References
20Claims
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Key dates
| Filing date | Jun 17, 2004 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For each current image output from a pixel matrix, the digital words relative to at least one masked line of the matrix are processed to generate a current correction digital code. From this code, a black level compensation signal is generated and applied as an offset control on pixel signal amplification. If the current correct digital code does not differ from the code calculated for a previous image output by a predetermined amount, then the code for the previous image is instead used to generate the black level compensation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.