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License plate letter recognition method, system and device and storage medium

A recognition method and letter technology, applied in the direction of character and pattern recognition, image data processing, instruments, etc., can solve the problem of processing too much data, improve robustness and accuracy, increase recognition speed, and reduce computation Effect

Active Publication Date: 2021-01-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods of using templates or neural networks have the problem of processing too much data

Method used

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  • License plate letter recognition method, system and device and storage medium
  • License plate letter recognition method, system and device and storage medium
  • License plate letter recognition method, system and device and storage medium

Examples

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Embodiment Construction

[0052] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0053] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific ...

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Abstract

The invention discloses a license plate letter recognition method, system and device and a storage medium, and the method comprises the steps: obtaining a license plate image, binarizing the license plate image to acquire a binarized image; performing corrosion expansion on the binarized image to obtain a first image after corrosion expansion processing; obtaining a letter image from the first image, performing feature extraction on the letter image, and matching the extracted features with a feature table to obtain a letter recognition result; and performing feature extraction on the letter image, including performing multiple times of linear scanning on the letter image from multiple scanning positions, and obtaining the number of times of color mutation occurring in each linear scanningprocess as the feature of the letter image. In the character recognition process, only the image data at multiple positions need to be counted, the operand is greatly reduced, the recognition rate isincreased, the occupation of operation resources is reduced, and the invention can be widely applied to the field of letter recognition.

Description

technical field [0001] The invention relates to the field of letter recognition, in particular to a method, system, device and storage medium for letter recognition of a license plate. Background technique [0002] Nowadays, with the increase of automobile production and more and more private vehicles, effective management of vehicles is becoming more and more important. The car license plate is used as the identity mark of each vehicle. If the information of the car license plate can be quickly grasped, then the management of the vehicle will be more efficient. With the rapid development of machine vision, license plate recognition technology has emerged as the times require, and is widely used in road traffic flow monitoring, automatic recording of traffic violations, automatic safety management of parking lots, etc. [0003] License plate recognition is one of the widely used branches in the field of pattern recognition. There are two types of license plate recognition....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/34G06K9/46G06K9/62G06T5/30
CPCG06T5/30G06V30/153G06V10/56G06V20/625G06F18/22Y02T10/40
Inventor 连杰贺小勇周颖关建刚
Owner SOUTH CHINA UNIV OF TECH
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