Method and apparatus for auto focusing an imaging device
US7639937B2 · kind B2 · utility
4Cited by
11References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2005 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jun 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B13/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for accurately auto focusing a lens of an imaging device. In an exemplary embodiment, an imaged scene is split into an array of zones. The minimum and maximum sharpness score for each zone is determined over a plurality of lens positions. A histogram of the lens positions of the corresponding maximum sharpness score for each zone is created. The peak of the histogram is determined to be the best focus position for a given scene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.