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License plate area positioning method, device and equipment

A technology of license plate area and positioning method, which is applied in the field of image recognition, can solve problems such as license plate area positioning errors, and achieve the effects of solving positioning errors, reducing detection areas, and improving accuracy

Inactive Publication Date: 2019-11-19
上海世茂物联网科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem in the related art that edge detection easily leads to wrong positioning of the license plate area, the present invention provides a positioning method, device and equipment for the license plate area to at least solve the above problems

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  • License plate area positioning method, device and equipment
  • License plate area positioning method, device and equipment
  • License plate area positioning method, device and equipment

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Embodiment Construction

[0040] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0041] In this embodiment, a method for locating a license plate area is provided, figure 1 It is the flow of a method for locating a license plate area according to an embodiment of the present invention Figure 1 ,Such as figure 1 As shown, the method includes the following steps:

[0042] Step S102, collecting an image of the vehicle, and converting the image into a gray image;

[0043] Step S104, performing edge detection on the gray image by a first edge detection algorithm to obtain a first edge detection result, and performing edge detection on the gray image by a second edge detection algorithm to obtain a second edge detection result;

[0044] Step S106, performing a logical OR operation...

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Abstract

The invention discloses a license plate area positioning method, device and equipment, and the method comprises the steps: collecting an image of a vehicle, and converting the image into a gray image;performing edge detection on the gray image through a first edge detection algorithm to obtain a first edge detection result, and performing edge detection on the gray image through a second edge detection algorithm to obtain a second edge detection result; performing logical OR operation on the first edge detection result and the second edge detection result to obtain a third edge detection result; filtering the third edge detection result through rectangular and connected domain region hybrid filtering; obtaining fourth edge detection results. The first edge detection algorithm and the second edge detection algorithm are combined for edge detection, the detection area is reduced, the detection area is further reduced through a rectangular and connected area hybrid filtering method, theproblem that edge detection easily causes positioning errors of the license plate area is solved, and the accuracy of the license plate positioning area is improved.

Description

technical field [0001] The present invention relates to the field of image recognition, in particular to a method, device and equipment for locating a license plate area. Background technique [0002] License plate area location refers to using rectangular filter detection to identify the area containing the license plate in the captured vehicle image. License plate area location is the premise of license plate recognition. Accurately extracting the license plate area from the vehicle image can effectively improve the accuracy of license plate recognition. The current method of locating the license plate area mainly relies on edge detection, which extracts pixels with edge features in the image through edge detection, but the single use of edge detection can easily lead to incorrect positioning of the license plate area, thereby affecting the correct rate of license plate recognition. [0003] In the related art, the edge detection easily leads to the wrong positioning of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/32G06K9/46
CPCG06V20/62G06V10/443G06V20/625
Inventor 陈鹏孙岩江砥中
Owner 上海世茂物联网科技有限公司
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