Two-place double-license-plate detection and recognition method and system based on deep learning

Abstract

The invention provides a two-place double-license-plate detection and recognition method and system based on deep learning, and the two-place double-license-plate detection and recognition method comprises the steps: constructing a vehicle data set with license plate marks, and carrying out the sample marking; training an improved MTCNN license plate detector, positioning coordinates of a licenseplate area and four corners of a license plate in the image by using the trained license plate detector, and correcting the license plate area by using the coordinates of the four corners of the license plate; training a license plate character detector, and detecting bounding boxes and categories of all characters in the license plate; and sorting the license plate character detection results, and outputting a serial license plate character sequence. The two-place double-license-plate detection and recognition method is mainly used for license plate detection and recognition of vehicles in two places in a complex scene, and the used networks are light networks, and the license plate detection and recognition accuracy can be improved while the time consumed for license plate detection andrecognition is effectively shortened. In addition, four angular point coordinates of the license plate are adopted for license plate correction, and the inclination and distortion conditions of the license plate are effectively improved, and the license plate recognition effect is improved.

Description

technical field [0001] The invention belongs to the technical field of license plate detection, and in particular relates to a technical scheme of a detection and recognition method for dual license plates in two places. Background technique [0002] Vehicles are an important means of transportation, and their management is an important part of urban traffic management and safety management. As the identification code of the vehicle, the license plate can uniquely represent the vehicle object, so the management and identification of vehicles using the license plate has become the hottest and most challenging task in recent years. [0003] The detection and recognition of the license plate is the technology of locating the position of the license plate from the complex natural image and recognizing the license plate number. The process of license plate detection and recognition is generally divided into two categories, one is vehicle detection, license plate location, and li...

AI Technical Summary

Problems solved by technology

In addition, when facing double license plates, the size of license plates in mainland China, Hong Kong, and Macau is different, and there are two license plates in a small area, which greatly affects the positioning effect of license plates

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