Detailed Explanation of License Plate Recognition System - Tigerwong

License plate recognition system is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, vehicle license plate recognition system (VLPR) can detect vehicles on the monitored road and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals and number plate color) License plate recognition is an important part of modern intelligent transportation system. By analyzing the vehicle image or video sequence taken by the camera, the unique license plate number of each vehicle can be obtained, so as to complete the recognition process. Through some subsequent disposal means, parking lot charge management, traffic flow control index measurement and vehicle positioning can be realized , automobile anti-theft, automatic supervision of Expressway speeding, electronic police running red lights, highway toll stations and so on. It has practical significance for maintaining traffic safety and urban public security, preventing traffic congestion and realizing traffic automatic management.

Automatic license plate recognition technology can realize automobile "identity" without any change Automatic registration and verification. The vehicle license plate number is the only "identity" of the vehicle Identification. This technology has been applied to various occasions such as highway toll collection, parking management, weighing system, traffic guidance, traffic law enforcement, highway inspection, vehicle scheduling, vehicle detection, etc. several application modes are listed below: monitoring and alarm, such as wanted or reported missing vehicles, unpaid vehicles, vehicles without annual inspection, hit and run and illegal vehicles "Blacklist" vehicles. Just input the license plate number into the application system. The license plate recognition equipment is installed at the designated intersection, bayonet or carried by law enforcement personnel at any time.

The system will read the license plate number of all passing vehicles and communicate with the blacklist in the system In comparison, once the designated vehicle is found, the alarm information will be sent out immediately. The system can work continuously all day, will not be tired, and the error rate is very low; it can adapt to high-speed vehicles; it can complete tasks during vehicle driving without affecting normal traffic; the driver will not be aware of and has high confidentiality in the whole monitoring process. The application of this system will greatly improve the efficiency of law enforcement. Speeding Violation punishment is generally used in expressways. The specific application is to set up speed monitoring points on the road.

License plate recognition technology combined with speed measurement equipment can be used for vehicle speeding violation punishment. Capture speeding vehicles and identify license plate numbers, and send license plate numbers and pictures of illegal vehicles to each exit; reward points are set at each entrance to identify passing vehicles with license plate recognition equipment and compare the numbers with the existing ones After receiving the number comparison of speeding vehicles, once the numbers are the same, start the warning equipment to notify the law enforcement personnel for disposal. Compared with the traditional overspeed monitoring method, this application can save the police force and reduce the work intensity of law enforcement personnel, and it is safe, efficient and hidden. Drivers need to remind themselves not to overspeed, which greatly reduces the accidents caused by overspeed. Vehicle access management Record the license plate number and access time of the vehicle, and install the license plate recognition equipment at the entrance and exit. It is combined with the control equipment of automatic door and railing machine to realize the automatic management of the vehicle.

It can be applied to the parking lot to realize the automatic timing and charging, and can also automatically calculate the available number of vehicles and give prompts to realize the automatic management of parking charging, save manpower and improve efficiency. It is applied to intelligent parking The energy community can automatically determine whether the incoming vehicles belong to the community and realize automatic timing and charging for Non internal vehicles. This application can also be combined with the vehicle dispatching system in some units to automatically and objectively record the departure of their vehicles. The license plate recognition management system adopts the license plate recognition technology to achieve no parking, no card collection and effectively improve the access of vehicles Efficiency. The automatic release system automatically reads the license plates of passing vehicles and queries the internal database.

For vehicles requiring automatic release, the system drives the electronic door or railing machine to pass through, and inputs the specified license plate information into the system. For other vehicle systems, warnings will be given and handled by the personnel on duty. It can be used in special units (such as military management zone, secret losing unit, key maintenance unit, etc.) Road and Bridge toll gates, high-end residential areas, etc. expressway toll management vehicles recognize the vehicle license plate when entering, store the entrance data into the toll collection system, and install license plate recognition equipment at each entrance and exit of the expressway. When the vehicle arrives at the entrance, it recognizes its license plate again, and uses the entrance data according to the license plate information to realize toll management in combination with the entrance and exit data. This application can realize automatic toll collection It can also prevent cheating and prevent the loss of accounts receivable.

With the expansion of networking scope, expressway has begun to implement networking charging. The charging difference of different models is becoming higher and higher. The problem of drivers using the loopholes of the existing charging system to evade fees by changing cards halfway will become more and more prominent. The use of license plate recognition technology is the fundamental method to solve this problem. Calculate vehicle travel The travel time reads all passing vehicles and sends the license plate number back to the traffic command center.

The traffic management system can take the average travel time of vehicles on a road as a parameter to judge the congestion of the road. The license plate recognition equipment is installed at the starting and ending points of the road. The management system of the license plate recognition system command center can calculate the average travel time of vehicles according to these results The automatic registration of license plate number is generally manually recognized and then input into the management system. The traffic supervision department has to deal with a large number of pictures of illegal vehicles every day. This method has a large workload and is prone to fatigue and misjudgment.

The use of automatic recognition can reduce the work intensity and greatly improve the disposal speed and efficiency. This function can be used in electronic police system and road monitoring system The advantage of license plate recognition is that it can correspond the card to the car. The license plate recognition parking lot management system automatically recognizes and converts the vehicle license plate number image taken by the camera at the entrance into digital signals. One card and one car can be achieved. The management can be improved to a higher level.

The advantage of the correspondence between card and car is that the long-term rental card must be used together with the car, so as to eliminate the loophole of using one card and more cars High efficiency of property management; at the same time, it can automatically compare vehicles in and out to prevent theft. The upgraded camera system can collect clearer pictures as archives, which can provide strong evidence for some disputes. The license plate recognition system facilitates managers to compare vehicles when they leave the site, greatly enhancing the safety of the system. It completes the function of automatic license plate recognition Yes, the automatic license plate recognition technology is a pattern recognition technology that uses the dynamic video or static image of the vehicle to automatically recognize the license plate number and color. Through the image acquisition and processing, it can automatically extract the license plate image from an image, automatically segment characters, and then recognize characters.

Its hardware foundation generally includes trigger equipment (monitor whether the vehicle enters the field of vision) camera equipment, lighting equipment, image acquisition equipment, disposal machine (such as computer) for identifying license plate number, etc.