Automatic vehicle identification and classification (AVIC) system employing a tunnel-arrangement of PLIIM-based subsystems
US6827265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Nov 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/02325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic vehicle classification and identification (AVIC) system for installation along a roadway. The system comprises first and second planar light illumination and imaging (PLIIM) based imaging and profiling subsystems mounted above and along side of the roadway. The function of these subsystems is to profile the geometry of top and side surfaces of each vehicle travelling under the subsystem and generate vehicle profile data for each such vehicle, and also, to capture digital images of both the front and rear license plates mounted on each vehicle, and generate vehicle image data representative of each captured digital image thereof. A computer system is provided for receiving vehicle image and profile data generated by first and second PLIIM based profiling systems, and processing the vehicle image and profile data so as to automatically identify and classify each vehicle travelling along said roadway. By virtue of the present invention, it is now possible to identify and classify vehicles by reading their license plates using planar laser illumination beams and linear image detection arrays with coplanar fields of view, thereby avoiding the need for large and expensive hi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.