Automatic license plate recognition method and system

Abstract

The invention discloses an automatic license plate recognition method and an automatic license plate recognition system. The system comprises a high-resolution camera (300), a detection and tracking module (312), a hazardous event detection module (316), an image extraction module (322) and a license plate recognition module (324), wherein the high-resolution camera (300) is used for acquiring a video image of a traffic scene; the detection and tracking module (312) is used for detecting and tracking a vehicle in the video image; the hazardous event detection module (316) is used for judging whether the tracked vehicle causes a hazardous event or not according to a set traffic event alarm rule; the image extraction module (322) is used for extracting a video image of the vehicle when the hazardous event detection module (316) judges the occurrence of the hazardous event of the vehicle; and the license plate recognition module (324) is used for detecting and recognizing the license plate of a traffic violation vehicle in the video image of the vehicle. The automatic license plate recognition method and the automatic license plate recognition system can be applied to more complex traffic scenes; simultaneously, the types of recognizable traffic violation events of traffic vehicles are expanded greatly.

Description

technical field [0001] The invention relates to an automatic license plate recognition method and system thereof. Background technique [0002] At present, the license plate detection and recognition system has been widely used in the transportation field. It is mainly used in bayonets of expressways or expressways, entrances and exits of parking lots, etc. The basic implementation of the system is to set up a camera at a relatively low position of each bayonet, first capture a clear image of the license plate of the stopped car, and then use the image detection method to detect the position of the license plate in the image, and then extract and recognize the license plate text . [0003] Therefore, the actual application of the current license plate recognition system is mainly limited to bayonets, and its application in various road traffic scenarios with larger and more important markets is still very limited. At the same time, it is also susceptible to interference f...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the actual application of the current license plate recognition system is mainly limited to the bayonet, and the application in various road traffic scenarios with a larger market and more important is still very limited.

At the same time, it is also susceptible to interference from many factors, such as the resolution of traffic video, the accuracy of license plate recognition, the detection of illegal vehicles and the imperfect camera mechanism, etc. There is a big bottleneck in the application of license plate recognition system in road monitoring

[0004] Most of the current violation detection is based on the ground sense coil, which also severely limits the types of detectable violation events.

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