Multiple camera calibration chart
US11082566B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2017 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Aug 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A chart for calibrating a system of multiple cameras, the chart comprising: a background; an array of dots contrasting the background, wherein the array of dots are arranged in rows and columns, wherein the array of dots comprise a first dot array, and a second dot array, wherein the first dot array fully occupies a first region of evenly spaced dots with a first dot density, the second dot array fully occupies a second region of evenly spaced dots with a second dot density, and wherein the second region is enclosed within the first region; a group of first markers in the first region, a group of second markers in the second region, and a third marker at the center of the chart, wherein each second marker is closer to the third marker than each first marker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.