Method to provide smoothness for road geometry data at intersections
US7084882B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2004 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | May 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/106
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for representing shapes of road segments is disclosed. The shape of a portion of road that spans at least one intersection is represented using a single continuous non-uniform B-spline. The single continuous non-uniform B-spline is divided into separate sections by knot insertion at each position corresponding to the location of a spanned intersection. The separate sections of the single continuous non-uniform B-spline are each re-parameterized into multiple separate continuous non-uniform B-splines. Then, data indicating each of the separate non-uniform B-splines is used to represent each of the corresponding road segments in the portion of road.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.