Vehicle detection through image processing for traffic surveillance and control
US4847772A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1987 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Feb 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A vehicle detection system for providing data characteristic of traffic conditions includes a camera overlooking a roadway section for providing video signals representative of the field (traffic scene), and a digitizer for digitizing these signals and providing successive arrays of pixels (picture elements) characteristic of the field at successive points in space and time. A video monitor coupled to the camera provides a visual image of the field of view. Through use of a terminal and in conjunction with the monitor, an operator controls a formatter so as to select a subarray of pixels corresponding to specific sections in the field of view. A microprocessor then processes the intensity values representative of the selected portion of the field of view in accordance with spatial and/or temporal processing methods to generate data characteristic of the presence and passage of vehicles. This data can be utilized for real-time traffic surveillance and control, or stored in memory for subsequent processing and evaluation of traffic flow conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.