The survey shows that the license plate recognition of parking lots is increasingly favored by car owners and parking lot operators. Its efficient and intelligent functions can enable vehicles to pass quickly, avoid peak road congestion, and users queue in line; use the license plate number as the entry and exit certificate to improve the parking of vehicles is safe, and the loopholes in toll collection are solved; the card management work is eliminated, and the problem of users forgetting to bring cards is avoided. So parking lot license plate recognition system has so many functions, what are its components?
 

       The parking lot of the license plate recognition system is basically the same as the original parking lot system equipment, including intelligent barriers, barrier control machines (ticket boxes), ground sense coils, vehicle detectors, electronic display screens, guard boxes, surveillance cameras, and parking lot management computers. . The biggest difference is the video recognition and card exemption, which requires parking lot surveillance cameras and barrier control machines with higher functional requirements. Next, Doyle will introduce the core components to complete the license plate recognition.
 

       1. Surveillance camera, there is a big difference between the surveillance camera and the general image comparison camera function of the parking lot. It is a special license plate recognition camera for the parking lot. It uses high-speed DSP embedded intelligent hardware and embedded recognition software to complete video acquisition, Image preprocessing, license plate detection, license plate segmentation, character recognition, tracking comparison, image compression, data transmission and other complex computer image processing technologies, the system has fast recognition speed and high reliability, and the equipment can separately license plates for the two input videos Recognition, according to different engineering application scenarios, the two channels of video can be selected as the front or rear mode recognition, without affecting each other.
 

        2. Fill-in light license plate recognition has very high requirements on the on-site environment of the parking lot. It is inevitable that there will be insufficient light. The fill-in light can ensure that the license plate recognition camera has enough light to successfully capture the license plate.