Camera calibration method and camera calibration device
US8269848B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2005 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Jun 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Planar calibration indices (c1) including coordinate information of at least four points are placed on a first plane (S1), and an image plane of the camera image including the calibration indices is input as a second plane (S2). Points (c2) existing on the second plane and corresponding to predetermined portions of the calibration indices are specified, and homography between the first plane and the second plane is computed, on the basis of the corresponding relationship of the at least four points included commonly in the first plane and the second plane, so that the camera image is calibrated. For example, a device is mounted on a vehicle, and four points, whose arrangement on a plane in 3D space is known, are used as calibration indices, and corresponding four points on the camera image, which correspond to them respectively, is achieved automatically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.