Imaging apparatus performing auto focusing function with plurality of band pass filters and auto focusing method applied to the same
US8422878B2 · kind B2 · utility
3Cited by
5References
22Claims
0Family size
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Key dates
| Filing date | Mar 9, 2011 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging apparatus and an auto focusing method are provided. A plurality of focus signal values are calculated for a plurality of frequency bands of a captured image signal. An amount of defocus of a focus lens is calculated based on focus signal values calculated for two positions. A position of the focus lens is controlled depending on the calculated amount of defocus. Thereby, the imaging apparatus can detect a focus at higher speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.