Method and apparatus of determining the best focus position of a lens
US7474846B2 · kind B2 · utility
7Cited by
11References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Nov 28, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for accurately auto focusing a lens of an imaging device. 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 weighted 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.