Adaptive sensitivity control, on a pixel-by-pixel basis, for a digital imager
US8009206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2002 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Jun 6, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method adaptively control sensitivity, on a pixel-by-pixel basis, of a digital imager. An illumination intensity level mapping controller determines a number of pixels of image data having illumination intensity levels within a first defined range of illumination intensity levels and determines an illumination intensity level mapping function based upon the determined number of pixels within the first defined range of illumination intensity levels. An exposure controller determines a number of pixels having illumination intensity levels within a second defined range of illumination intensity levels and determines an integration time based upon the determined number of pixels having illumination intensity levels within the second defined range of illumination intensity levels. A transfer control function generation circuit determines a composite transfer control function based on the determined integration time and determined illumination intensity level mapping function; determines each transition point between a plurality of discrete transfer control functions from the determined integration time and the determined illumination intensity level mapping function; and im…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.