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License plate recognition method, device, apparatus, and storage medium

A license plate recognition and recognition method technology, applied in the fields of equipment and storage media, license plate recognition methods and devices, can solve the problems such as the second digit of a blue ordinary license plate is not a letter, the letter D is confused, etc., so as to overcome the problem of low license plate recognition accuracy, The effect of improving accuracy

Active Publication Date: 2018-12-21
BEIJING KUANGSHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing methods have many defects in the accuracy of recognition. The most important problem is that in order to be able to recognize some special heterogeneous license plates (such as license plates with non-Chinese characters at the beginning, abnormal Chinese character license plates such as embassies / police cars) Illegal characters are recognized in some positions, for example, the first digit of the ordinary blue license plate of the license plate is not a Chinese character, or the second digit of the ordinary blue license plate is not a letter, etc., or the letter D is confused with the number 0

Method used

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  • License plate recognition method, device, apparatus, and storage medium
  • License plate recognition method, device, apparatus, and storage medium
  • License plate recognition method, device, apparatus, and storage medium

Examples

Experimental program
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no. 1 example

[0029]Since there are many defects in the recognition accuracy of the existing license plate recognition method, in order to make up for this defect to improve the recognition accuracy, this embodiment firstly provides a license plate recognition method. It should be noted that, in the flowchart diagram of the accompanying drawing The steps shown can be implemented in a computer system, such as a set of computer-executable instructions, and, although a logical order is shown in the flowcharts, in some cases, the steps shown can be performed in an order different from that shown here. or the steps described. This embodiment will be described in detail below.

[0030] see figure 1 , is a flow chart of the license plate recognition method provided by the embodiment of the present invention. The following will be figure 1 The specific process shown will be described in detail.

[0031] Step S101, acquiring the license plate recognition result recognized by the bit-by-digit rec...

no. 2 example

[0073] Corresponding to the license plate recognition method in the first embodiment, Figure 4 It shows a one-to-one license plate recognition device using the license plate recognition method shown in the first embodiment. like Figure 4 As shown, the license plate recognition device 400 includes an acquisition module 410, a first data processing module 420, a second data processing module 430 and a third data processing module 440. Wherein, the implementation functions of the acquisition module 410, the first data processing module 420, the second data processing module 430, and the third data processing module 440 are in one-to-one correspondence with the corresponding steps in the first embodiment. To avoid redundant description, this embodiment Not detailed one by one.

[0074] The acquiring module 410 is configured to acquire the license plate recognition result recognized by the bitwise recognition method.

[0075] The first data processing module 420 is configured ...

no. 3 example

[0084] like Figure 5 As shown, is a schematic diagram of a terminal device 300 . The terminal device 300 includes a memory 302, a processor 304, and a computer program 303 stored in the memory 302 and operable on the processor 304. When the computer program 303 is executed by the processor 304, the first implementation is realized. The license plate recognition method in the example, in order to avoid repetition, will not be repeated here. Alternatively, when the computer program 303 is executed by the processor 304, the functions of each model / unit in the license plate recognition device of the second embodiment are realized, and in order to avoid repetition, details are not repeated here.

[0085]Exemplarily, the computer program 303 can be divided into one or more modules / units, and one or more modules / units are stored in the memory 302 and executed by the processor 304 to implement the present invention. One or more modules / units may be a series of computer program inst...

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Abstract

The invention provides a license plate recognition method, a device, a device and a storage medium, belonging to the technical field of image processing. The method comprises the following steps of: acquiring a license plate recognition result recognized by a bit-by-bit recognition method; determining a hypothetical license plate recognition result one-to-one corresponding to the plurality of preset license plate types according to a processing rule of the plurality of preset license plate types and a license plate recognition result; determining a confidence level corresponding to a pluralityof hypothetical license plate recognition results; The hypothetical license plate recognition result corresponding to the maximum confidence level is selected as the target license plate recognitionresult from a plurality of confidence levels. By generating a hypothetical license plate recognition result one-to-one corresponding to a plurality of preset license plate types, thus, the heterogeneous license plate will retain a higher confidence level, and the confidence level of the wrong license plate will be greatly reduced after the above processing. Furthermore, by comparing the confidencelevel of the license plate recognition result after passing the processing rules of different preset license plate types, the accuracy of the license plate recognition is effectively improved.

Description

technical field [0001] The present invention relates to the field of image processing, in particular, to a license plate recognition method, device, equipment and storage medium. Background technique [0002] License plate detection and recognition technology has always been an important part of the security monitoring environment. For example, in automatic parking lot monitoring, high-speed bayonet monitoring and other application scenarios, there is a need to clearly recognize the license plate in the screen. Therefore, the existing license plate recognition technology has also been systematically developed. Among the many algorithms, classification algorithms are usually used to classify each character of the license plate bit by bit to obtain a predicted character and the confidence level of the character. The final result is obtained by splicing the results of the license plate together, and the recognition confidence of the license plate is obtained by multiplying the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06K9/34
CPCG06V10/23G06V30/153
Inventor 邵帅史雨轩
Owner BEIJING KUANGSHI TECH
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