Method and device for identifying vehicle image

Abstract

The method and device for identifying running vehicle image may be used in toll gate of expressway and highway, entrance guard, safe guard, city traffic and other fields. By means of robot vision technology, image compression technology, contact and non-contact card read/write technology, and automatic vehicle license plate distinguishing technology, the present invention realizes vehicle identity confirming and raises passing vehicle managing efficiency. The device includes passing card, passing card read/write device, main controlling computer, image acquisition card, video unit, light compensating lighting unit, display and vehicle managing center database server. The method and device of the present invention can identify vehicles accurately and has real-time operation, opening system, convenient use, high performance/cost ratio and other advantages.

Description

Technical field: [0001] The invention relates to a passing vehicle image recognition method and device, which are applied in the fields of high-speed and high-grade highway vehicle toll stations, access control, security protection, urban traffic and the like. It belongs to the field of machine vision. Background technique: [0002] With the continuous rapid development of my country's automobile industry and the continuous increase of vehicle ownership, places such as vehicle transit charges, city checkpoints, parking lots and community access control have put forward higher requirements for vehicle identification and monitoring. [0003] Existing invention has following several kinds: [0004] Year-on-year technology {I}, Chinese Patent Publication No. CN 1201957A, the publication date was December 16, 1998, and the title of the invention is "A Closed Expressway Toll System with Image Monitoring Function". The lane system is composed of, in the entrance lane, the pass ro...

AI Technical Summary

Problems solved by technology

Its shortcoming is that it only proposes to use the monitoring function of the monitoring camera to solve the problem of fraud and fare evasion when the toll collector operates

Its shortcoming is that the automatic recognition rate of the vehicle license plate cannot reach 100%. The reasons include the limitation of the recognition technology, the license plate is damaged, it is blocked by objects on the frame, the license plate number is dirty, or even man-made damage, snow , heavy rain, heavy fog, etc., so this method cannot be used to authenticate vehicles that cannot be identified or are incorrectly identified

Its shortcoming is that the positioning rate of the vehicle license plate cannot reach 100%, and the vehicle that cannot be located or is wrongly located cannot be authenticated.

In addition, the binarized image of the vehicle license plate can only reflect a license plate image feature of the vehicle, but cannot reflect the overall features of the vehicle

[0007] In addition, the common deficiency in the comparison technologies {I}, {II}, and {III} is that all three inventions lack a technical method for real-time authentication of vehicle identities at the entrances and exits of vehicles.

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