Grey card for controlling exposure and white balance of a digital camera
US7885526B2 · kind B2 · utility
1Cited by
4References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Jul 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A target (10, 20) is disclosed suitable for setting the exposure and white balance of a photographic digital camera. The target (10, 20) comprises a target surface (12) that has a reflectance of 18% for all wavelengths of visible light. The target surface (12) is provided with a feature (16) upon which the camera is able to focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.