License plate detection and recognition method and device

Abstract

The invention discloses a license plate detection and identification method and device. The method comprises the steps of obtaining traffic image data; inputting the traffic image data into a vehicledetection model for detection, and outputting image data including a motor vehicle; inputting the image data including the motor vehicle into a license plate detection model for detection, and outputting the license plate image data; inputting the license plate image data into a license plate optimization model for optimization, and outputting the optimized license plate image data; and inputtingthe optimized license plate image data into a license plate recognition model for recognition, and outputting license plate characters. The vehicle and the license plate are respectively detected by adopting two YOLO algorithms so that the defect of poor accuracy of identifying a small object by the YOLO algorithm is overcome. In addition, the license plate image is preprocessed by adopting the SRGAN, so that the definition of an input image of the CNN network is improved.The end-to-end CNN neural network is adopted as a license plate recognition model, license plate image data are segmented and recognized at the same time, the processing speed is high, and the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of license plate detection, in particular to a license plate detection and recognition method and device. Background technique [0002] With the continuous improvement of the socio-economic level and the popularization of vehicles, the ever-expanding transportation industry has a greater demand for more intelligent technologies and systems, and intelligent transportation systems have become a hot issue in social life. As an important part of the intelligent transportation system, the vehicle identification system has a wide range of applications in the fields of highway entrances, unmanned parking lots, and automatic recording of illegal vehicles. [0003] Vehicle License Plate Recognition (VLPR) refers to a technology that can detect vehicles on the monitored road and automatically extract vehicle license information (including Chinese characters, English letters, Arabic numerals and license plate colors) f...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a license plate detection and recognition method and device to solve the problems encountered in the existing license plate recognition method based on license plate character segmentation, such as blurred license plate, greatly affected by light, and tilted license plate. The accuracy of recognition will be greatly reduced

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