Road departure warning system
US9077958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2011 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jul 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30256
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The prevention of vehicle accidents is targeted. A road texture model is created based on a vehicle camera image. An initial vehicle location estimate is determined, and map imagery is obtained based on this location estimate. A refined vehicle location is determined using visual egomotion. In particular, 3D features of the vehicle image and the retrieved map imagery are identified and aligned. A map image is selected based on this alignment, and the location associated with the map image is modified by a displacement between the selected map image and the vehicle image to produce a refined vehicle location. A road boundary model is created based on the road texture model and the refined vehicle location, and a road departure model is created based on the road boundary model and vehicle odometry information. The operator of the vehicle is warned of a road departure based on the road departure model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.