Defocus estimation method independent of the scene content and use in an autofocus system
US9906707B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Aug 24, 2015 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Oct 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10148
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of adjusting a lens may include adjusting the lens at a first focus position, and acquiring a first image of a scene through the lens. The method may further include adjusting the lens at a second focus position, and acquiring a second image of the same scene through the lens. In addition, the method may include producing respective power spectra of the first and second images, and producing a criterion representing the ratio of the power spectra to estimate a focus error of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.