Method and apparatus for providing automatic lane calibration in a traffic sensor
US7454287B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 2005 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | May 15, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/167
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of operating a traffic sensor to define ranges of centers of traffic lanes from the traffic sensor is described. The method comprises a) providing a set of lane center variables representing the ranges of the centers of the traffic lanes from the traffic sensor; b) initializing each lane center variable in the set of lane center variables to have an associated starting range value; and then, c) updating the set of lane center variables by, for each vehicle in a plurality of vehicles, i) detecting the vehicle, ii) determining an associated lane center variable having an associated lane center range value closest to the vehicle; iii) estimating a vehicle displacement from the associated lane center range value, and iv) calculating a new lane center range value for the associated lane centre variable using the associated lane center range value and the vehicle displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.