Camera calibration apparatus
US8872920B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Jun 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30256
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A captured image including a preferential calibration index arranged in an exclusive region in a first plane and a non-preferential calibration index arranged in a common region is obtained. First, the coordinate position of the preferential calibration index is detected, and then the coordinate position of the non-preferential calibration index is calculated based on the positional relationship with the detected preferential calibration index. A homography between a captured-image surface of the image surface and the first plane is calculated based on the actual coordinate positions and the calculated coordinate positions representing the coordinates of at least four points, and camera calibration is performed using the homography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.