Image-based vehicle license plate character segmentation method and system

Abstract

The invention provides an image-based vehicle license plate character segmentation method and system. The method comprises the steps of analyzing a connected area of an image to obtain a first group of candidate areas of vehicle license plate characters in the image; performing vertical projection analysis on the image to obtain a second group of candidate areas of the vehicle license plate characters in the image; obtaining the average width of the vehicle license plate characters in the image according to the first group of candidate areas and the second group of candidate areas, and creating a corresponding vehicle license plate template according to the average width; separately matching the vehicle license plate template with the first group of candidate areas and the second group of candidate areas in a sliding mode, and determining an optimal segmentation position of the vehicle license plate characters in the image according to the matching results. By adopting the method and the system, the influence of fuzzy or missing vehicle license plate characters in the vehicle license plate image on character segmentation can be reduced, and the vehicle license plate characters can be accurately segmented, so that the vehicle license plate character recognition rate can be improved.

Description

technical field [0001] The invention relates to the field of license plate recognition, in particular to an image-based license plate character segmentation method and system thereof. Background technique [0002] Vehicle License Plate Recognition (VLPR) is an application of computer video image recognition technology in vehicle license plate recognition. License plate recognition technology requires the ability to extract and recognize moving license plates from complex backgrounds, and identify vehicle license plates through license plate extraction, image preprocessing, feature extraction, and license plate character recognition. [0003] License plate recognition is widely used in highway vehicle management. In the ETC (Electronic Toll Collection, electronic toll collection) system, the license plate recognition is combined with DSRC (Dedicated Short Range Communications, dedicated short-range communication technology) technology to identify the vehicle identity, and th...

AI Technical Summary

Problems solved by technology

[0004] However, in the current license plate recognition system, due to the influence of the actual environment, not all characters in the license plate image can be clearly seen, and the blurred or missing characters often have a great impact on character segmentation, and inaccurate character segmentation will directly lead to Character recognition errors, resulting in a decline in the recognition rate of the entire license plate recognition system

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