American license plate recognition method and system based on image correction

Abstract

The invention relates to an American license plate recognition method and system based on image correction, and a text detection, image correction, text recognition and text classification module, andthe method comprises the following steps: carrying out the preprocessing of an image file of a data set, carrying out the data enhancement, and generating a training set and a test set; designing a text detection module, detecting text information in the image, realizing text and background segmentation in the image, and obtaining a text image only containing the text information; correcting thetext image by adopting an image correction module, and converting the originally distorted or inclined text image into a horizontal direction; recognizing the corrected text image to obtain letters, numbers and other information contained in the text image; and constructing a text classification module, screening out a license plate number, an Asian name and an annual inspection date from all textinformation, and completing license plate recognition. According to the invention, the problems of complex background pattern, fuzzy target text image deformation, complex text information and largecalculation amount when a neural network is used for off-line training during American license plate recognition are solved.

Description

technical field [0001] The invention relates to the fields of image recognition and artificial intelligence, in particular to an image correction-based American license plate recognition method and system. Background technique [0002] License plate recognition technology is an important technology in the construction of smart city traffic. Accuracy and real-time performance are two important indicators to measure license plate recognition technology. The license plate image is a natural scene image, and it is easily affected by the light when collecting the license plate image. The license plate itself will also be tilted, motion blurred, and faded and stained on the license plate due to different shooting angles. These uncertain interferences will directly affect the license plate information recognition. the accuracy. Unlike domestic license plates that have uniform styles such as blue-backed white characters, yellow-backed black characters, and white-backed black charac...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a method and system for American license plate recognition based on image correction to solve the problem of complex background patterns, blurred target text image deformation, complex text information and offline training using neural networks when recognizing American license plates. computationally intensive problem

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