Image sensing apparatus comprising a logarithmic characteristic area and a linear characteristic area
US7508422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2005 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | May 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/571
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensing apparatus is provided with an image sensor having a photoelectric conversion characteristic comprised of a linear characteristic area where an electrical signal is outputted after being linearly converted in relation to an amount of an incident light and a logarithmic characteristic area where the electrical signal is outputted after being logarithmically converted in relation to the amount of the incident light. An evaluation value detector of a signal processing unit detects evaluation values concerning an image sensing control from each of the linear characteristic area and the logarithmic characteristic area upon picking up an image of a subject based on pieces of subject luminance information in the respective areas. A central control unit (image sensing controller) carries out the image sensing control based on the evaluation values corresponding to the respective areas detected by the evaluation value detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.