Method and apparatus for exposure control for a sparsely sampled extended dynamic range image sensing device
US6813046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2000 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | May 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of exposure control in a camera employing a sparsely sampled extended dynamic range image sensing device includes the steps of: providing a sparsely sampled extended dynamic range image sensing device having fast photosites with a predetermined response to light exposure interspersed with slow photosites with a slower response to the same light exposure; using the image sensor to produce a sparsely sampled high resolution digital image having fast pixel values produced by the fast photosites and slow pixel values produced by the slow photosites; calculating an exposure control value using only the slow pixel values from the a sparsely sampled extended dynamic range image; and using the exposure control value to modify the exposure to the image sensing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.