Apparatus and method for gain correction
US8275213B2 · kind B2 · utility
12Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | May 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for digital column gain mismatch correction are described. At least one test signal pixel is added to each column in an image sensor. For each column the test signal from at least one test pixel is read and compared to a target value. A correction value is calculated based on comparing the test signal to the target value. The correction value is stored in a memory. When the regular photo-pixels are read, the photo-pixel signals are modified based on the stored correction value for each column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.