Traffic flow measuring method and apparatus
US5283573A · kind A · utility
41Cited by
7References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1991 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Apr 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
This invention relates to a method an apparatus for measuring traffic flows or in other words, the flows of vehicles, inside and near a crossing, and is directed to provide method and apparatus capable of extracting vehicles with a high level of accuracy. Overlap of vehicles can be avoided by setting the field of a camera not to a range from the inflow portion to the vicinity of center of the crossing, but to a range from the center to the vicinity of the outflow portion (151) of the crossing. Accordingly, accuracy of traffic flow measurement can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.