Auto-focus apparatus and method
US10122909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2015 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Dec 3, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/67
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An auto-focus apparatus and an auto-focus method are provided. The auto-focus apparatus includes: a lens, a lens driving component, and a focus control module; wherein the lens is configured to guide light transmitted from a target object; wherein the lens driving component is configured to drive the lens to move to the multiple positions to obtain the original images, and drive the lens to a focusing position obtained by the focus control module; and wherein the focus control module is configured to obtain frequency respond results each of which corresponds to interested pixels in one of the original images, calculate a desired frequency respond result based on the obtained frequency respond results and take a first position of the lens corresponding to the desired frequency respond result as the focusing position. Accordingly, focus accuracy and focus speed under conditions of poor contrast texture and weak light are improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.