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A license plate character segmentation method and device

A character segmentation, license plate technology, applied in character recognition, character and pattern recognition, instruments, etc., can solve the problems of broken connected area method or poor character adhesion processing, complex classifier method and neural network method algorithm, etc., to improve accuracy. sexual effect

Active Publication Date: 2020-06-16
BEIJING ICETECH SCI & TECH CO LTD
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Problems solved by technology

Among them, the vertical projection method is very sensitive to inclined characters; the connected region method is poor in dealing with breaks or character adhesion; the classifier method and neural network method are more complicated.

Method used

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  • A license plate character segmentation method and device
  • A license plate character segmentation method and device

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Embodiment Construction

[0035] In order to enable your examiners to further understand the structure, features and other purposes of the present invention, the attached preferred embodiments are now described in detail as follows. The described preferred embodiments are only used to illustrate the technical solutions of the present invention, not to limit the present invention. invention.

[0036] figure 1 A flow chart of a license plate character segmentation method according to the present invention is given. Such as figure 1 Shown, according to a kind of license plate character segmentation method of the present invention comprises:

[0037] The first step S1 is to input the image of the license plate area;

[0038] The second step S2 is to perform image preprocessing on the image of the license plate area;

[0039] The third step S3 is to perform threshold segmentation on the image of the license plate area, obtain the binary image of the image of the license plate area, obtain the marked con...

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Abstract

The invention provides a license plate character segmentation method. The method includes: inputting a license plate area image; performing image preprocessing on the license plate area image; performing threshold segmentation on the license plate area image, obtaining a binary image of the license plate area image, and using connected area markers method to obtain the marked connected area, filter the marked connected area according to the prior knowledge; calculate the character recognition confidence of the marked connected area, if the confidence is not less than the confidence threshold, mark the connected area as a character block area; Fork tree model matching method, get the best character area and output. Compared with the prior art, the invention can segment the characters of the license plate quickly and accurately.

Description

technical field [0001] The invention relates to image processing, video monitoring and intelligent transportation, in particular to a method and device for segmenting license plate characters. Background technique [0002] With the increasing modernization of cities, the number of motor vehicles continues to increase, and intelligent transportation systems are playing an increasingly important role. License plate recognition technology is an important part of modern intelligent transportation systems and has a wide range of applications. License plate recognition technology is divided into three components: license plate location, character segmentation and character recognition. Wherein, the character segmentation is to accurately segment a single character area in the located license plate area. The accuracy of character segmentation directly affects the accuracy of later character recognition. [0003] Currently commonly used character segmentation algorithms include: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32G06K9/34
CPCG06V20/62G06V10/267G06V20/625G06V30/10
Inventor 班华忠李志国李文杰曾建平王正
Owner BEIJING ICETECH SCI & TECH CO LTD
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