A method and device for number plate recognition

Abstract

An embodiment of the invention discloses a license plate recognition method and device. The method includes: acquiring a license plate area in an image; according to preset recognition area parameter of parameters and relational parameter of the characters, determining the recognition area of each character; using a preset character recognizer to recognize the recognition areas of the characters to acquire recognition results; calculating a sum of matching degrees of the characters; in a preset range, according to preset traversing conditions, adjusting the preset recognition area parameter of the characters and the relational parameter of the characters, and returning to the step of determining the recognition areas of the characters until that values in the preset range are traversed according to a traversing algorithm; from the calculated sum of the matching degrees of the characters, acquiring a highest recognition result of the sum of the matching degrees of the characters, as an optimal recognition result; outputting the optimal recognition result. The license plate recognition method and device has the advantages that the problem that noise interference occurs in the image processing step during character recognition is avoided, system stability is improved and interference resistance is improved.

Description

technical field [0001] The invention relates to the technical field of image recognition, in particular to a method and device for number plate recognition. Background technique [0002] Number plate recognition technology has a wide range of applications in practical applications, which can be summarized as follows: number plate recognition is the technical basis for many important applications, such as in the field of intelligent transportation, automatic parking management, high-speed automatic toll collection, vehicle violation monitoring, etc. etc.; number plate recognition is the basis for locating and managing vehicles, such as in the field of mass video retrieval, license plate recognition, house number recognition, text road sign recognition, etc.; number plate recognition provides important clues for accurate retrieval. [0003] In the prior art, the number plate recognition method usually includes the following three steps: number plate location, character segment...

AI Technical Summary

Problems solved by technology

These methods are greatly affected by noise, which can lead to the failure of character segmentation and thus the failure of character recognition

[0004] In addition, in the prior art, the character segmentation in number plate recognition usually processes the characters individually instead of the number plate as a whole, and does not fully consider the relationship between characters, which makes the single character segmentation vulnerable to input image noise The influence of the system, the system stability and anti-interference are low, and it cannot be widely used in complex environments

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