Method for identifying enlarged license plate of large vehicle

Abstract

The invention discloses a method for identifying an enlarged license plate of a large vehicle, and the method comprises the steps: firstly receiving an image of a vehicle with a large license plate, marking the position of the large license plate through an image marking tool, recognizing the position and size of the large license plate in the image, obtaining the image data of the large license plate through shearing, and then carrying out the OTSU binarization operation; obtaining image data and non-character image data of license plate characters, then carrying out character recognition model recognition and related steps, filtering out negative samples, and obtaining specific amplified license plate letters and numbers; and forwards intercepting an image with fixed length and height according to the position of the first letter so as to obtain a specific Chinese character, and outputting a license plate number recognition result. Therefore, the method is not interfered by different factors such as the material, the size, the fonts and the font spacing of the amplified license plate at the top of the vehicle, can achieve the quick and objective recognition and judgment, provides accurate contrast information for the violation phenomenon in the driving process of a large-scale vehicle, and facilitates the timely processing of the responsibility investigation of an accident.

Description

technical field [0001] The invention belongs to the technical field of urban traffic, and mainly relates to a method for recognizing enlarged license plates of large vehicles. Background technique [0002] During the construction of urban buildings, many large vehicles are needed for cargo transportation, such as: construction waste transport vehicles, commercial concrete vehicles, etc. These vehicles need to place an enlarged license plate with an enlarged number on the top of the vehicle according to the road driving requirements, but these vehicles have been in and out for a long time On a muddy construction site, the conventional license plate under the vehicle is usually blocked by mud, which makes it impossible for the license plate recognition equipment to recognize the traffic road and the access control checkpoint. At the same time, it is affected by different factors such as the material, size, font, and font spacing of the enlarged license plate placed on the top o...

AI Technical Summary

Problems solved by technology

[0002] During the construction of urban buildings, many large vehicles are needed for cargo transportation, such as: construction waste transport vehicles, commercial concrete vehicles, etc. These vehicles need to place an enlarged license plate with an enlarged number on the top of the vehicle according to the road driving requirements, but these vehicles have been in and out for a long time On a muddy construction site, the conventional license plate under the vehicle is usually blocked by mud, which makes it impossible for the license plate recognition equipment to recognize the traffic road and the access control checkpoint. At the same time, it is affected by different factors such as the material, size, font, and font spacing of the enlarged license plate placed on the top of the vehicle. Interference caused by the currently used bayonet license plate recognition equipment cannot be recognized normally, and accurate license plate image information cannot be provided in the event of traffic violations, and accountability cannot be made in a timely manner. Therefore, many drivers of such large vehicles have a fluke mentality after discovering this problem. , there are often violations of laws and regulations such as running a red light and speeding, causing serious traffic accidents.

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