A real-time detection method for vehicles without a license plate and license plate cover

Abstract

The invention discloses a real-time detection method for vehicle unlicensed and license plate occlusion. Including steps: (1) Single-frame license plate recognition and vehicle detection; (2) Associate the license plate recognized in each frame with the license plate recognized by previous frames, and output the license plate trajectory chain after comprehensive recognition; (3) Multi-frame The same vehicle that appears is associated, remove the false detection target, and output the vehicle trajectory chain when the vehicle exits the screen; (4) analyze the comprehensive recognition results of the license plate trajectory chain, determine whether there is a situation where the characters are occluded, and give the (5) Match the track chain of the license plate with the track chain of the vehicle. When the track chain of the vehicle does not match the license plate, it is judged that the vehicle has no license. The invention can not only effectively and automatically detect no license plate or license plate occlusion, but also can determine the position of the occluded characters in the license plate, and can realize real-time processing. Card.

Description

technical field [0001] The invention relates to a real-time detection method for a vehicle without a license plate and a license plate blocked, belonging to the field of computer vision. Background technique [0002] The Intelligent Transportation System (ITS) effectively integrates advanced information technology, data communication transmission technology, electronic sensor technology, electronic control technology and computer processing technology into the entire transportation management system. Facts have proved that the application of ITS has greatly improved The efficiency of transportation, it has played an increasingly important role in motor vehicle flow monitoring, road planning and design, and traffic command and guidance. [0003] The road checkpoint system based on video analysis is an important part of the intelligent transportation system. The system is mainly used in urban roads or highway security checkpoints and key security areas, combined with high-def...

AI Technical Summary

Problems solved by technology

However, the current license plate recognition technology and vehicle detection technology used in the bayonet system are not used in combination to provide intelligent alarms for unlicensed vehicles, nor can they provide intelligent alarms for the behavior of blocking license plates, so that such illegal events can only be detected by naked eyes.

[0005] Some scholars have designed a special algorithm for the partially occluded license plate in order to effectively recognize the rest of the unoccluded characters, but this method cannot judge whether the license plate is occluded

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