Calibration board and calibration method and system
US12243271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2022 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Jul 22, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30244
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This application discloses a calibration method, a calibration system, and a calibration board. The calibration board includes checkerboard cells arranged on a surface of the calibration board, where at least one dot is arranged in each of the checkerboard cells, the dots of the calibration board include at least a first feature dot and a second feature dot, the first feature dot and the second feature dot are arranged in the checkerboard cells according to a random rule or a specific rule, and a diameter of the first feature dot is greater than a diameter of the second feature dot. The calibration board in this application improves the stability and accuracy of calibration board detection by utilizing characteristics such as a high detection accuracy and a strong anti-blur capability of a dot mark, combining with corner points of checkerboard cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.