Phase-detection auto focus method and device therefor
US10827113B2 · kind B2 · utility
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Key dates
| Filing date | Jun 21, 2017 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Jun 21, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/663
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A phase-detection auto focus method includes: dividing a focus region into a plurality of sub-regions, and respectively calculating a phase difference and a confidence level of each sub-region; performing dynamic matching in a corresponding weight table according to the phase difference and the confidence level of each sub-region, and performing a table lookup to obtain a corresponding weight value; calculating a phase difference and a confidence level of the focus region in conjunction with the weight value; and performing auto focusing according to the phase difference and the confidence level of the focus region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.