Ambient correction in rolling image capture system
US8289300B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2009 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Apr 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0383
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments are disclosed that relate to the correction of an image acquired in a rolling image capture system for ambient light. One embodiment provides a device comprising a screen, a rolling image capture system, a local light source, and a controller. The controller is configured to operate the local light source while acquiring first and second frames of image data to integrate each field of image sensor pixels for a duration of local+ambient light and for a duration of ambient light such that a sum tlocal+ambient+tambient for the first frame is different than a sum tlocal+ambient+tambient for the second frame for each field of pixels. The controller is further configured to determine an ambient light value, and to adjust one or more pixels based upon the ambient light value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.