Determining sparse versus dense pattern illumination
US10401158B2 · kind B2 · utility
7Cited by
22References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 6, 2018 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Mar 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30244
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An estimate of distance between a user and a camera on a device is used to determine an illumination pattern density used for speckle pattern illumination of the user in subsequent images. The distance may be estimated using an image captured when the user is illuminated with flood infrared illumination. Either a sparse speckle (dot) pattern illumination pattern or a dense speckle pattern illumination pattern is used depending on the distance between the user's face and the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.