Method for reducing row noise with dark pixel data
US7564489B1 · kind B1 · utility
6Cited by
7References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Feb 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reducing the row noise from complementary metal oxide semiconductor (CMOS) image sensor by using average values from sub-regions of the shielded pixels. The method operates on sensor with and without a Color Filter Array (CFA) before any interpolation is applied and estimates the local offset by subtracting out outliers and averaging the averages of sub-regions in the shielded pixels. The method also reduces the pixel-to-pixel noise while reducing the row noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.