Navigation apparatus, method for map matching performed in the navigation apparatus, and computer-readable medium storing a program for executing the method
US6385536B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation apparatus has a camera for taking images of a road on which the vehicle is traveling; means for detecting and monitoring lane markers on the road by processing the images; and road determining means for determining the road on which the vehicle is traveling just after passing a fork. This road determination is made based on predetermined conditions relating to the fork and the lane markers detected and monitored. According to the structure described above, it is possible for the navigation apparatus to know the road on which the vehicle is traveling immediately after passing the fork. Further, when the vehicle's actual location is displayed at a wrong position on the digital road map, the navigation apparatus can correct the position immediately after passing the fork. This is advantageous in that the driver can know its accurate location from the displayed information immediately after passing the fork.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.