Real-world anchor in a virtual-reality environment
US10776954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2018 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Mar 7, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/131
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head-mounted device (“HMD”) is configured to perform intrinsic and/or extrinsic calibration of the HMD's camera system by exploiting a displayed electronic image rendered on a separate display screen. A series of images are captured using one or more of the HMD's cameras. The displayed image is a known image that includes markers with known characteristics to the HMD. The known characteristics include known marker shapes and a number of coded or un-coded markers. Each image in the series captures the displayed image at a different angle or distance relative to another image in the series. The HMD then identifies, from within the series of images, two-dimensional image positions of the markers. The HMD uses the two-dimensional image positions and a determined three-dimensional position of the markers to perform a bundle adjustment used to subsequently determine a position and angular alignment of the separate display screen relative to the HMD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.