Range differentiators for auto-focusing in optical imaging systems
US11159712B2 · kind B2 · utility
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5References
39Claims
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Key dates
| Filing date | Feb 22, 2019 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Jul 21, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/959
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A range differentiator useful for auto-focusing, the range differentiator including an image generator providing an image of a scene at various physical depths, a depth differentiator distinguishing portions of the image at depths below a predetermined threshold, irrespective of a shape of the portions, and providing a depth differentiated image and a focus distance ascertainer ascertaining a focus distance based on the depth differentiated image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.