How to Evaluate a License Plate Recognition System Technically

With the increase of vehicles, people pay more and more attention to the problem of urban parking. Although the application of license plate recognition technology has helped reduce the pressure of urban traffic, with the acceleration of China's urbanization process, the traffic pressure will be more and more severe. Intelligent traffic management has become the general direction of traffic development. As an important core of the intelligent traffic management system, the license plate recognition system will be further supported and developed, but the parking lot license plate recognition system also has good and bad. Then, how to evaluate the advantages and disadvantages of a license plate recognition system technically? In the future, license plate recognition technology will be more widely used.

At that time, the license plate recognition system industry will also face a major reshuffle. Only companies with independent core technology and qualified product quality can pass. Therefore, having excellent technology is the king, which is also the only way for license plate recognition technology to move towards the stage of rapid development. I. recognition rate of license plate recognition system the most important indicator of whether a license plate recognition system is practical is the recognition rate. The international transportation technology department has made a special discussion on the recognition rate index, which requires that the correct recognition rate of all signs is 85% 95% 24 hours a day.

In order to test the recognition rate of a license plate recognition system, the system needs to be installed in a practical application environment, run more than 24 hours a day, collect the license plates of at least 1000 vehicles passing in natural traffic flow for recognition, and store the license plate images and recognition results for retrieval and viewing. Then, we also need to get the actual passing vehicle image and the correct manual recognition results. After that, the following recognition rates can be counted: 1. Recognition rate of natural traffic flow = total number of correct recognition of full license plate / total number of actually passing vehicles. 2. Percentage of recognizable license plates = total number of license plates correctly read manually / total number of vehicles actually passed. 3. The correct recognition rate of the whole license plate = the total number of license plates correctly recognized / the total number of license plates manually read. These three indicators determine the recognition rate of the license plate recognition system. Such as reliability and false recognition rate are the intermediate results in the process of license plate recognition.

II. The recognition speed of license plate recognition system determines whether a license plate recognition system can meet the requirements of real-time practical application. If a system with high recognition rate needs a few seconds or even minutes to recognize the results, the system will be of no practical significance because it can not meet the real-time requirements in practical applications. For example, in highway toll collection, one of the functions of license plate recognition application is to reduce traffic time, and speed is a powerful guarantee to reduce traffic time and avoid lane traffic jam in this kind of application. The recognition speed proposed by international transportation technology is less than 1 second, the faster the better. III. background management of license plate recognition system the background management system of a license plate recognition system determines whether the license plate recognition system is easy to use.

It must be clearly recognized that it is impossible to achieve 100% recognition rate, because the license plate is dirty, blurred, blocked, or the weather may be bad (snow, hail, fog, etc.). The functions of the background management system should include: 1. Reliable storage of identification results and vehicle image data. When the multi-functional system operation makes the network error, it can protect the image data from loss and facilitate manual troubleshooting afterwards; 2. Effective automatic comparison and query technology. The recognized vehicle license plate number should be automatically compared with thousands of license plate numbers in the database and prompted for alarm. If the vehicle license plate number is not read correctly, the fuzzy query technology should be used to obtain the relatively best comparison result; 3. For networked operation, a good license plate recognition system also needs to provide real-time communication, network security, remote maintenance, dynamic data exchange, automatic database update, hardware parameter setting and system fault diagnosis. Science is the primary productive force, which is a matter of principle and essence.

It is essential to eliminate everything and products without development and innovation. The same is true of the license plate recognition system. With the popularization of information technology and the continuous growth of car ownership, license plate recognition technology will have a big stage and bright prospects in the future, Of course, we need excellent technology to take the lead. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.