Vehicle-applied rear-and-side monitoring system
US6618672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Oct 22, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2300/8066
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A vehicle-applied rear-and-side monitory system including an image taking means for taking an image of a rear-and-side view of the subject vehicle traveling in a lane; a characteristic point extracting device for extracting at least one point as a characteristic point from an image of a following vehicle contained in a first image, taken at a first time-point, of the rear-and-side view, the following vehicle traveling at the rear of the subject vehicle in the lane of the subject vehicle or in a neighboring lane; a corresponding point detecting device for detecting a corresponding point, corresponding to the characteristic point, in a second image taken at a second time-point following the first time-point; an optical flow forming device for forming an optical flow of the characteristic point of the following vehicle from a vector connecting the characteristic point and the corresponding point; and a dead angle area located vehicles-distance calculating device for calculating at least any one of a vehicles-distance between the subject vehicle and the following vehicle and a relative position therebetween after a time-point of disappearance of the optical flow outside an image plane …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.