Sampling images for color balance information
US7486819B2 · kind B2 · utility
4Cited by
17References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 23, 2003 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Jan 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Pixels from an image are sampled for auto white balance (AWB) statistics. To avoid the effects of monochromatic regions, only pixels located at or near edges between monochromatic regions and neighboring regions are sampled for computation of the AWB gains. A sampling criteria is applied to each pixel that automatically excludes pixels in monochromatic regions of any size. As a result, white balancing is based only on portions at or near edges of substantially monochromatic regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.