Video camera apparatus capable of simply extracting brightness information used in auto-iris control
US6747704B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a video camera apparatus, a proper iris control operation can be carried out based upon pseudo-luminance information, and the iris control operation and also the focus control operation can be independently performed. The R, G, B pixel data which are outputted from a CCD image sensor and are acquired before being inputted to an image signal processing unit are multiplied with each other so as to produce the pseudo-luminance information instead of the luminance signal. The iris control operation is carried out based on this pseudo-luminance information. Also, the respective R, G, B pixel data acquired before being inputted to a white balance amplifier are multiplied with each other to produce the pseudo-luminance information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.