Embedded license plate recognition system based on ARM microprocessor

Abstract

The invention relates to an embedded license plate recognition system based on an ARM microprocessor. The system is composed of an upper computer and a control board integrated with an ARM microprocessor. The upper computer transplants a successfully compiled license plate recognition program into the control board; and the control board integrated with an ARM microprocessor is used for operatinga license plate recognition program, processing a collected license plate image, and identifying a license plate number. The license plate recognition program is implemented as follows: license platepositioning is carried out; to be specific, primary positioning is carried out by using an HSV color positioning method to obtain a candidate license plate area; license plate determination is carriedout; to be specific, a real license plate is determined by using an SVM license plate determination model and whether secondary positioning needs to be carried out on the real license plate is determined; character segmentation is carried out; to be specific, the license plate with the uniform size is segmented by using a vertical projection method to obtain license plate characters; and character recognition is carried out; to be specific, character recognition is carried out by using a Softmax multi-element logistic regression classifier to obtain a finally recognized license plate number.The embedded license plate recognition system has characteristics of small size, low cost and fast recognition.

Description

technical field [0001] The invention relates to the technical field of license plate recognition, in particular to an embedded license plate recognition system based on an ARM microprocessor. Background technique [0002] In recent years, the license plate recognition system has become an important part of the intelligent transportation system, and it is also a research hotspot in interdisciplinary subjects such as digital image processing, computer vision and pattern recognition. The research, development and application of license plate recognition technology has great academic value, social value and economic value. License plate recognition technology has broad application prospects in many fields such as parking lot fee management, access control, traffic monitoring, including highways, law enforcement departments, etc. It can help the parking lot realize automatic timed charging, solve the congestion problem at the toll gate during the peak period of traffic flow, Ass...

AI Technical Summary

Problems solved by technology

[0004] The traditional license plate recognition system is mainly composed of camera, video capture card, PC and other main modules. Its characteristics are that the system is easy to implement, but the cost is high, the real-time performance is poor, the volume is large, and the installation and maintenance are inconvenient.

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