Vehicle license plate recognition method, apparatus and device, and computer readable storage medium

Abstract

The embodiment of the present invention discloses a vehicle license plate recognition method, apparatus and device, and a computer readable storage medium. The method comprises the steps of: obtainingvehicle images collected by an image collection device, and employing an HSV color space model to generate gradient gray images of the vehicle images; in the gradient gray images, employing a projection method to determine positions of the vehicle license plates and separately extract vehicle license plate area images; according to the area of the vehicle license plate area images and the numberof the characters included in the vehicle license plates, performing segmentation extraction of the characters in the vehicle license plate area images; extracting grid features and cross point features of the characters to form recognition feature vectors of the characters; and performing feature matching in a pre-stored character library according to the recognition feature vectors of the characters to obtain the recognition result of each character, wherein the character library comprises characters meeting a vehicle license plate requirement and feature vectors corresponding to the characters. The vehicle license plate recognition method, apparatus and device, and a computer readable storage medium can rapidly and accurately locate the vehicle license plate area and can improve the recognition efficiency and the accuracy of vehicle license plate recognition.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of image processing, in particular to a license plate recognition method, device, equipment and computer-readable storage medium. Background technique [0002] With the rapid development of Internet technology, intelligent networked vehicles are the strategic commanding heights of automotive industry technology and the focus of a new round of international competition. A new round of scientific and technological revolution and industrial revolution is developing in depth. Intelligent networked vehicles and smart transportation applications involve various cutting-edge technologies such as autonomous driving, broadband mobile communications, artificial intelligence, and big data. As the most intuitive and easily identifiable ID number of each car, the license plate's rapid identification will have an important impact on future intelligent networked vehicles. Places such as smart par...

AI Technical Summary

Problems solved by technology

[0005] However, due to the large area and many pixels of the acquired license plate image, in order to detect the required license plate area in the acquired license plate image, it needs to go through complicated calculations and the amount of calculation is huge. If it is applied to embedded devices, its speed will be It cannot meet the requirements and is not suitable for hardware implementation. In addition, it is difficult to achieve satisfactory positioning results in complex backgrounds and uneven lighting. Moreover, most current license plate recognition technologies use a single color model, while a single color The segmentation and positioning of the model will limit the accuracy of the positioning results due to the complex environment in which the car is located.

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