four main modules of license plate recognition system < / a >

　　1. Vehicle detection module. The vehicle detection module mainly tracks the vehicles entering the detection range, and records the close-up pictures of the vehicles at a good position with a good angle, so as to lay the foundation for subsequent identification. Generally speaking, the license plate recognition system with word-of-mouth has great development efforts in the detection and tracking module

　　2. License plate location module. License plate location module is an important part of license plate recognition system. The positioning module firmly locks the position of the license plate through the pictures or videos collected in the early stage. Good license plate recognition system manufacturers can develop a new algorithm for license plate location to meet the license plate location under different shooting angles and backgrounds

　　3. License plate segmentation module. The license plate segmentation module uses the characteristics of different grayscale, color difference and edge difference of license plate text, and can eliminate the interference of noise around the license plate and the interference of license plate angle inclination, so as to segment the license plate accurately

　　4. License plate tracking module. License plate tracking module generally belongs to the background module of license plate recognition system. It forms some analysis and recognition models by recording the appearance, recognition results, accuracy and other historical information of vehicles every day, which is conducive to the recognition of frequent vehicles or blocked vehicles in a short time