Abnormal vehicle license plate recognition method and system

A recognition method and technology of a recognition system, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as unsatisfactory license plate recognition effect

Active Publication Date: 2015-03-04
ZHEJIANG LISHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the current LPR system has an unsatisfactory effect on license plate recognition under abnormal conditions, and proposes an abnormal license plate re

Method used

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  • Abnormal vehicle license plate recognition method and system
  • Abnormal vehicle license plate recognition method and system
  • Abnormal vehicle license plate recognition method and system

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Experimental program
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Effect test

Embodiment 1

[0110] The abnormal license plate recognition method of the present invention can obtain real-time and high-precision license plate recognition results for abnormal license plate images or videos. Its specific method flow is as follows figure 1 shown.

[0111] Step 10, capture the image of the abnormal license plate. An ordinary camera, video camera or video camera can be used to capture the image of the abnormal license plate. In order to obtain high-quality video or images, it is also possible to use a high-definition camera with LED fill light and filter light to capture images of abnormal license plates, which use ambient light dynamic tracking technology and local brightness feedback closed-loop control technology to intelligently adjust The exposure parameters of the camera are adapted to harsh environments, climates or light changes, and the clearest images can be captured around the clock. In the night environment, the supplementary light is automatically turned on,...

Embodiment 2

[0156] In addition to the recognition method for abnormal license plates described above, the present invention also proposes a recognition system for abnormal license plates. The system block diagram is shown in the attached Figure 8 shown.

[0157] Such as Figure 8 As shown, the recognition system of the abnormal license plate proposed by the present invention includes: an image capture device 10, which is used to capture the image of an abnormal license plate; an image preprocessing device 20, which is used to preprocess the image of the abnormal license plate to obtain a filtered image; The vehicle body image detection device 30 is used to detect the vehicle body image in the filtered image; the abnormal license plate positioning device 40 is used to locate the abnormal license plate in the vehicle body image; the abnormal license plate character segmentation device 50 is used to locate the abnormal license plate in the license plate area Segment the characters of the a...

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Abstract

The invention discloses an abnormal vehicle license plate recognition method and a system. the method comprises the following steps: 10, an image of an abnormal vehicle license plate is captured; 20, the image of the abnormal vehicle license plate is pre-treated to obtain a filter image; 30, a vehicle body image is detected in the filter image; 40, the abnormal vehicle license plate is positioned in the vehicle body image; 50, characters of the abnormal vehicle license plate are segmented in the vehicle license plate region; and 60, a Chinese character classifier, an alphabet classifier and a mixed number and alphabetclassifier are arranged respectively so as to recognize the characters of the abnormal vehicle license plate, and the following operation is carried out on each classifier. Thus, the vehicle license plate can be recognized in the abnormal condition, and the vehicle license plate recognition precision is high.

Description

technical field [0001] The invention relates to the technical field of license plate recognition, in particular to an abnormal license plate recognition method and system. Background technique [0002] With the rapid development of the information age, a new type of traffic road control information combined with information technology, data communication transmission technology, electronic automatic control technology, sensor induction trigger technology and computer data processing technology - intelligent transportation system (Intelligent Transportation System, referred to as ITS) It has been recognized and adopted by more and more countries, and it has had a profound impact on strengthening highways and road management, improving transportation efficiency, reducing traffic accidents, investigating violations of laws and regulations, and ensuring social stability. [0003] License Plate Recognition (LPR) system is an important part of ITS. It mainly includes four steps: v...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/46
CPCG06V10/443G06V10/267G06V30/293G06F18/2411
Inventor 陈海江蓝天翔詹常青王鲁光
Owner ZHEJIANG LISHI TECH
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