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License plate detection method and system

A license plate detection and license plate technology, applied in the field of image processing, can solve the problems that the license plate classifier cannot detect the license plate area, reduce the detection rate of license plate detection, etc.

Active Publication Date: 2015-03-25
SHENZHEN JIESHUN SCI & TECH IND
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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a license plate detection method and system to solve the problem that when the image acquisition angle of the image acquisition device in the prior art is greater than 30 degrees, the license plate classifier cannot detect the license plate area, which reduces the cost of license plate detection. detection rate problem

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  • License plate detection method and system
  • License plate detection method and system

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Embodiment Construction

[0054]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] figure 1 The flow chart of the license plate detection method provided by the embodiment of the present invention, when the image acquisition angle of the image acquisition device is greater than 30 degrees, the license plate area can still be detected, which improves the detection rate of the license plate detection; refer to figure 1 , the license plate detection method may include:

[0056] Step S100: Acquiring the license plate image;

[0057] The ...

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Abstract

The embodiment of the invention provides a license plate detection method and system. The method includes the steps of obtaining a license plate image, carrying out stroke width conversion is carried out on the license plate image to obtain the stroke width of each pixel point on an edge, obtaining a character area according to the stroke width of each pixel point on the edge, judging whether the character area is a license plate character area, deleting a non-license plate character area in the character area, and outputting the character area where the non-license plate character is deleted to obtain a license plate area. When an image acquisition angle of image acquisition equipment is larger than 30 degrees, the license plate area can still be detected, and the detection rate of license plates is increased.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a license plate detection method and system. Background technique [0002] At present, license plate recognition equipment has been widely used in parking lots, urban roads, expressways and other areas for automatic capture and recognition of vehicle license plates. License plate character recognition mainly includes locating the position of the license plate in a frame of image, segmenting the area containing the license plate characters to obtain a single character, and then recognizing the single character. [0003] At present, when it is necessary to perform license plate detection on the acquired license plate image, the license plate image acquired by the image acquisition device is generally detected through a license plate classifier. The features of the area, and then use the license plate classifier to classify the acquired license plate area features to detect the lice...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/54
CPCG06V20/584
Inventor 唐健李昕李锐
Owner SHENZHEN JIESHUN SCI & TECH IND
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