Method and apparatus employing dynamic element matching for reduction of column-wise fixed pattern noise in a solid state imaging sensor
US7554066B2 · kind B2 · utility
10Cited by
2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2005 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Apr 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imager having a switching circuit that couples pixel columns to different sample and hold circuits to reduce the noticeability of column-wise fixed pattern noise. A controller randomly couples a pixel column to a sample and hold circuit, therefore fixed pattern noise emanating from a particular sample and hold circuit is not always associated with a single pixel column. Therefore the visual perception of fixed pattern noise associated with a particular sample and hold circuit is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.