A Recognition Method of Large Vehicle Enlarged License Plate

Abstract

The invention discloses a method for recognizing an enlarged license plate of a large vehicle. First, an image of the vehicle with the large license plate placed is received, and then the position of the large license plate is marked by an image labeling tool, the position and size of the large license plate in the image are recognized, and the image of the large license plate is obtained by cutting. image data, and then perform OTSU binarization operation to obtain image data and non-character image data of license plate characters, and then perform character recognition model recognition and related steps to filter out negative samples to obtain specific enlarged license plate letters and numbers; The position of the letter is forwarded to intercept the image of fixed length and height, so as to obtain the specific Chinese character, and output the license plate number recognition result. Therefore, it is not interfered by different factors such as the material, size, font, font spacing and other factors of the enlarged license plate on the top of the vehicle. Responsibility for timely processing.

Description

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

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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