Calibration index for use in calibration of onboard camera, method of onboard camera calibration using the calibration index and program for calibration apparatus for onboard camera using the calibration index
US8717442B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 19, 2010 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Mar 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30248
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For use in calibration of an onboard camera, there are provided a calibration index free of erroneous detection and a method of calibrating an onboard camera using such calibration index. The calibration index for use in onboard camera calibration includes a curved graphic formed of a curved line surrounding a predetermined region and a linear graphic comprising at least two straight lines forming an intersection point within the region surrounded by the curved graphic, the curved graphic and the linear graphic being formed in a same plane. A plurality of segments separated by the curved line forming the curved graphic and the straight lines forming the linear graphic are colored in a checkered pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.