The Commonly Used Trigger Mode of License Plate Recognition in Parking Lot Entrance and Exit Managem

At present, the entrance and exit management systems used in many parking lots in the market are license plate recognition. Taigewang technology has been committed to developing a highly reliable license plate recognition system, and its recognition rate has reached 99%. At present, there are two commonly used trigger modes of license plate recognition in our life. They are peripheral trigger and video trigger respectively. 1、 Peripheral trigger the working mode of peripheral trigger refers to the detection of vehicle passing signal by coil, infrared or other detectors. After receiving the vehicle trigger signal, the license plate recognition system collects the vehicle image, automatically recognizes the license plate and carries out subsequent processing. The advantages of this method are high trigger rate and stable performance; The disadvantage is that the ground needs to be cut to lay coils, and the construction amount is large. 2、 Video trigger video trigger means that the license plate recognition system uses the dynamic moving target sequence image analysis and processing technology to detect the movement of vehicles on the lane in real time, capture the vehicle image when the vehicle passes, recognize the vehicle license plate and carry out subsequent processing. The video trigger mode does not need the help of coil, infrared or other hardware vehicle detector. This method has the advantages of convenient construction, no need to cut the ground to lay the coil, and no need to install vehicle inspectors and other parts, but its disadvantages are also very significant. Due to the limit of the algorithm, the trigger rate and recognition rate of this scheme are much lower than those of external triggers.