A license plate recognition system and method based on image retrieval method

Abstract

The invention discloses a license plate recognition method and system based on an image retrieval method. The recognition principle is as follows: obtain a video stream; locate and track a target license plate contained in the video stream, and extract a number of target license plate images; Several target license plate images carry out eigenvalue extraction, obtain some target license plate eigenvalues; The described several target license plate eigenvalues ​​are combined, obtain target license plate eigenvalue group; The characteristic value of the license plate to be searched is compared with the target eigenvalue group , output the search result. The present invention compares and matches the eigenvalue of the license plate to be searched with the eigenvalue of the target license plate obtained by monitoring and other methods, thereby realizing the search for the license plate without specifically identifying the license plate number of the license plate being monitored, which can significantly improve the efficiency and efficiency of the license plate search. accuracy. At the same time, because there is no need to identify the license plate number, it can also accurately identify the fuzzy license plate acquired by monitoring.

Description

Technical field [0001] The invention relates to the field of license plate recognition, in particular to a license plate recognition system and method based on a picture retrieval method. Background technique [0002] As one of the main means of transportation in modern society, automobiles are being used more and more in people's lives and work. How to effectively monitor and manage vehicles becomes more and more important. However, it is a basic requirement for the automatic management of the traffic and public security industry to monitor the vehicle without installing other devices. Therefore, the automatic recognition system of the vehicle license plate is one of the key technologies for realizing traffic vehicle management and control. [0003] At the same time, we should also see that the rapid and timely search and tracking of specific vehicles has a great demand for vehicle control in the traffic and public security industries. Vehicle search and tracking have also become ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention of the present invention is to: aim at the above existing problems, provide a vehicle search problem through the existing monitoring network; solve the problem of efficient matching of license plates in the search process; solve the problem of specific identification in traditional license plate recognition Obtaining the license plate number, and then matching it with the searched license plate number brings about: monitoring high pixel requirements, time-consuming issues, and low recognition of license plate occluders

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