Vision-based highway overhead structure detection system
US7327855B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2006 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Feb 9, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2201/089
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An image sequence is inputted from a camera and vertical motion is estimated. A windowed horizontal edge-projection is extracted from the inputted image sequence and corresponding horizontal edges are projected. The horizontal edge-projection and the vertical motion estimation are combined in a horizontal segmentation and tracking element, and are forwarded to an object parameter estimation element, where the object's distance and height are estimated. This data is combined in a fusion with a radar detection element. By correctly matching the overhead objects sensed by the radar detection element and the video camera, the proximity and relative speed can be ascertained. Once overhead objects have been identified they can be isolated and not considered for collision avoidance purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.