Image-based license plate character segmentation method and system

Abstract

The present invention provides an image-based license plate character segmentation method and system thereof, including analyzing the connected regions of the image to obtain the first group of candidate areas of the license plate character in the image; performing vertical projection analysis on the image to obtain the The second group of candidate areas of the license plate characters in the image; obtain the average width of the license plate characters in the image according to the first group of candidate areas and the second group of candidate areas, and create a corresponding license plate template according to the average width; The license plate template is slidingly matched with the first group of candidate areas and the second group of candidate areas, and the best segmentation position of the license plate characters in the image is determined according to the matching results. Therefore, it is possible to reduce the impact of blurring or lack of license plate characters in the license plate image on character segmentation, and accurately segment the license plate characters, thereby improving the license plate recognition rate.

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, license plate recognition combined with DSRC (Dedicated Short Range Communications, dedicated short-range communication technology) technology to identify the identity of the vehicle, the pa...

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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