Methods and apparatuses for double sided dark reference pixel row-wise dark level non-uniformity compensation in image signals
US7924330B2 · kind B2 · utility
3Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Dec 20, 2007 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Dec 17, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses for row-wise dark level non-uniformity compensation of imaging sensor pixel signals. A column dependent dark reference value is determined as one of a linear and parabolic function of signal values from two areas of dark reference pixels and a column location and then used for dark level non-uniformity compensation of signal values from imaging pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.