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A method and system for identifying abnormal license plates

A recognition method and abnormal technology, applied in the field of abnormal license plate recognition methods and systems, and can solve problems such as unsatisfactory license plate recognition effects

Active Publication Date: 2019-01-01
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 recognition method and system, which can also real-time recognize the abnormal license plate in the above abnormal situation. License plate recognition, and specific high license plate recognition accuracy

Method used

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  • A method and system for identifying abnormal license plates
  • A method and system for identifying abnormal license plates
  • A method and system for identifying abnormal license plates

Examples

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 a method and system for identifying an abnormal license plate. The method includes the following steps: step 10, capturing an image of an abnormal license plate; step 20, preprocessing the image of an abnormal license plate to obtain a filtered image; step 30 , detect the vehicle body image in the filtered image; step 40, locate the abnormal license plate in the vehicle body image; step 50, segment the characters of the abnormal license plate in the license plate area; step 60, set the Chinese character classifier and letter classification respectively device and alphanumeric classifier to identify the characters of the abnormal license plate, and for each classifier, perform the following operations respectively. The invention can recognize the license plate in real time under abnormal circumstances, and achieves high recognition accuracy of the license plate.

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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Patent Type & Authority Patents(China)
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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