Novel license plate identification method and system

A technology of license plate recognition and license plate, which is applied in the field of new license plate recognition methods and systems, can solve the problems of low recognition rate and poor environmental adaptability, and achieve the effect of robust license plate recognition and accurate license plate recognition

Inactive Publication Date: 2014-11-19
胡艳艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the license plate recognition systems produced by these domestic companies have a low recognition rate and poor environmental adaptability when the license plate image is tilted, stained, or worn.

Method used

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Embodiment Construction

[0015] In the embodiment of the present invention, the new license plate recognition method includes key steps such as license plate image preprocessing, license plate location, license plate character segmentation and extraction, and license plate character recognition, which will be described one by one below.

[0016] a) License plate image preprocessing

[0017] In the license plate recognition system, because the image captured by the camera is often affected by many factors, the image quality cannot be directly used for system processing, so it is necessary to perform image preprocessing on the image with the license plate first. After preprocessing, the noise in the image can be removed, the key information of the image can be enhanced, and the complexity of image processing can be reduced, which can directly improve the robustness and accuracy of the entire license plate recognition system. License plate image preprocessing is mainly divided into the following three st...

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Abstract

The invention provides a novel license plate identification method and a system and particularly relates to an integral license plate identification system which utilizes various image processing algorisms to complete license plate image pretreatment and the final license plate character identification. The identification method comprises the following steps: in license plate positioning, the filtering technique based on the math morphology is adopted; in license plate character segmentation and extraction, the methods such as perpendicular projection are adopted; lastly, the license plate characters are indentified through the template matching technique based on multiple-characteristic extraction. Compared with the prior art, the novel license plate identification method and the system can identify the license plate quickly, robustly and accurately.

Description

technical field [0001] The invention relates to the technical field of image recognition, in particular to a new license plate recognition method and system. Background technique [0002] In recent years, with the rapid development of my country's transportation industry, it has also brought frequent traffic accidents, traffic congestion, traffic pollution and other problems. The establishment of an efficient intelligent transportation system ITS (Intelligent Transportation System) has become an urgent problem to be solved. The problem. The vehicle license plate is currently the only sign that can externally identify the identity of the car, so the vehicle license plate recognition system LPRS (License Plate Recognition System) is one of the most critical technologies in the ITS system. [0003] The license plate recognition system consists of three key modules: license plate location, license plate segmentation and character recognition, and the three modules are carried ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/36G06K9/46
Inventor 胡艳艳
Owner 胡艳艳
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