To extract the license plate information in night scene and improve the vehicle safety management competence, the research extracts the license plate message of night driving vehicles based on the infrared image technology. The license plate number is located by using the log operator edge detection, and characters are segmented and analyzed for realizing the function that vehicle license plate information acquirement. The result of the research indicates that infrared thermal imaging technology is able to pick up the plate information at night, which provides the reference for night plate information detection.
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