License plate positioning method and positioning device

A positioning method and positioning device technology, applied in the field of image processing, can solve the problems of long time consumption and complicated calculation, and achieve the effects of short time consumption, simple calculation and simple process

Inactive Publication Date: 2017-05-31
SHENZHEN JIESHUN SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a license plate positioning method and a positioning device, which are used to solve the problems of complex calculation and long time-consuming in the training process of the license plate classifier in the prior art

Method used

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  • License plate positioning method and positioning device
  • License plate positioning method and positioning device
  • License plate positioning method and positioning device

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Embodiment Construction

[0050] Embodiments of the present invention provide a license plate location method and location device, which are used to simplify the data processing process and reduce the number of features.

[0051] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052]The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawing...

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Abstract

An embodiment of the invention discloses a license plate positioning method and positioning device, and relates to the field of image processing, and aims to solve the problem that a license plate positioning method is complex in calculation, long in consumed time and the like in the prior art. The positioning method includes the steps: acquiring sample images with known categories; calculating pixel difference characteristics of the sample images; identifying categories of the pixel difference characteristics according to the categories of the sample images; leaning the pixel difference characteristics identified the categories by the aid of a machine learning algorithm to obtain a license plate classifier; performing classification sub-images in a first sub-image set to be detected by the aid of the license plate classifier to obtain first classification results; outputting license plate positioning results according to the first classification results. The sample images comprise license plate images and non-license-plate images, and images to be positioned are traversed by the aid of a first preset detection window to obtain the first sub-image set to be detected.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a license plate positioning method and a positioning device. Background technique [0002] The purpose of the license plate location task is to locate the position of the license plate in an image, which is the most basic step in the license plate recognition system in the field of intelligent transportation. After locating the area where the license plate is located from an image, further Identify license plate numbers in the area. [0003] At present, the commonly used and mature license plate location methods are mainly machine learning methods. The main idea of ​​machine learning is: collect a large number of license plate positive and negative sample data, and construct a feature set for expressing positive and negative sample data. Common features in the prior art Including rectangular features (haar-like), local binary pattern features (LBP) and direction gradient histogra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06K9/46
CPCG06V10/40G06V20/625G06F18/217G06F18/24
Inventor 唐健谢乃俊陶昆
Owner SHENZHEN JIESHUN SCI & TECH IND
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