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A license plate recognition method and device

A license plate recognition and license plate technology, applied in character and pattern recognition, instruments, computer components, etc., can solve problems such as inability to adapt to complex environments, poor robustness, etc.

Inactive Publication Date: 2019-05-21
北京市首都公路发展集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This application provides a license plate recognition method, which solves the problem that the traditional license plate recognition technology has poor robustness and cannot adapt to complex environments

Method used

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  • A license plate recognition method and device
  • A license plate recognition method and device
  • A license plate recognition method and device

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Embodiment Construction

[0042] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0043] Please see figure 1 , figure 1 It is a schematic flow chart of a license plate recognition method provided in the embodiment of the present application, combined below figure 1 The method provided in the embodiment of the present application will be described in detail.

[0044] Step S101, preprocessing the license plate image to be recognized.

[0045] License plate images are usually obtained by taking pictures or video screenshots, such as figure 2 As shown, it is the extracted license plate image. Mor...

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Abstract

The invention discloses a license plate recognition method. The method comprises: preprocessing a to-be-recognized license plate image; Extracting features of the preprocessed license plate image by using a convolutional neural network, and inputting the features into an LSTM network to obtain probability distribution of feature classification; And according to the number of characters of the license plate, using a CTC loss function to correspond the characteristics of the license plate image to the real characters of the license plate to obtain the license plate data of the to-be-identified license plate image, thereby solving the problem that the traditional license plate identification technology is poor in robustness and cannot adapt to a complex environment.

Description

technical field [0001] The present application relates to the field of artificial intelligence, in particular to a license plate recognition method and a license plate recognition device. Background technique [0002] License plate recognition is widely used in highway vehicle management, in electronic toll collection (ETC) systems, but traditional license plate recognition is often based on traditional computer vision technology for character segmentation, Hog (orientation gradient histogram) feature extraction and classification , this type of algorithm is simple in thinking, but its robustness is poor, and it cannot adapt to complex environments. Contents of the invention [0003] The present application provides a license plate recognition method, which solves the problem that the traditional license plate recognition technology has poor robustness and cannot adapt to complex environments. [0004] The application provides a license plate recognition method, character...

Claims

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Application Information

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IPC IPC(8): G06K9/34G06K9/42G06K9/46G06K9/62
Inventor 李少丁曹正凤卓晴刘晗王栋梁徐建波
Owner 北京市首都公路发展集团有限公司