Vehicle license plate recognition (VLPR) is an application of computer video image recognition technology in vehicle license plate recognition. License plate recognition is widely used in highway vehicle management. In the electronic toll collection (etc) system, it is also the main means of vehicle identification combined with DSRC technology.

 

License plate recognition technology requires that the moving car license plate can be extracted and recognized from the complex background. Through license plate extraction, image preprocessing, feature extraction, license plate character recognition and other technologies, the information such as vehicle brand, color, etc. can be recognized. At present, the latest technology level is that the recognition rate of initials and numbers can reach 99.7%, and the recognition rate of Chinese characters can reach 99%.

 

In the parking lot management, license plate recognition technology is also the main means of vehicle identification. License plate recognition technology has become the main means of vehicle identification.

 

License plate recognition technology combines with electronic toll collection system (etc) to identify vehicles. Passing vehicles do not need to stop when passing through the crossing, which can realize automatic identification of vehicle identity and automatic charging. In the management of parking lot, in order to improve the traffic efficiency of vehicles at the entrance and exit, license plate recognition is aimed at the vehicles without parking fee (such as monthly trucks and internal free vehicles). It is building an unattended fast lane, and the experience of getting in and out of the parking lot without card and parking is changing the management mode of getting in and out of the parking lot.