License plate detection and recognition system and method in unlimited security scene

Abstract

The invention provides a license plate detection and recognition system and method in an unlimited security scene. The system comprises a license plate detection module, a license plate correction module and a license plate recognition module. The license plate detection module extracts a license plate image according to the obtained unlimited security scene image, and transmits the license plate image to the license plate correction module in a matrix form; the license plate correction module converts the obtained license plate image into a positive-view license plate image; and the license plate recognition module recognizes the obtained positive-view license plate image by using a license plate recognition network. According to the invention, two-stage detection is carried out on the vehicle and the license plate by using a target detection algorithm based on deep learning, the problem that the license plate is too small in size on a security image and is difficult to detect is improved; then the license plate image distorted due to the influence of a shooting visual angle is corrected by using a spatial transformation network; and finally, the license plate is identified by using a full convolutional neural network with wide convolution and CTC loss, and the network identification speed and precision are accelerated without character segmentation.

Description

technical field

[0001] The invention relates to a license plate detection and recognition system in an unlimited security scene, in particular to a deep learning-based license plate detection and recognition system and its method, which belong to the technical field of computer vision. Background technique

[0002] License plate recognition is an important part of smart transportation and smart security. It plays an important role in speeding violation monitoring, vehicle tracking, electronic police, road condition regulation, etc. It can effectively save police force, reduce the work intensity of law enforcement officers, and promote urban traffic. run efficiently.

[0003] The license plate recognition system is to carry out digital image processing and analysis on the photos taken by the camera on the road, and comprehensively apply a large number of latest achievements in image processing and mathematical morphology methods to smooth, binarize, blur, edge detect, and ima...

Images