The increase in the number of private cars over the years indicates that people's living standards are also constantly improving. According to statistics, by the end of 2017, the number of motor vehicles in the country has reached 310 million. As a result, the traffic pressure and parking problems are becoming more and more severe. However, the power of technology is endless. For example, the development of license plate recognition system can be said to solve the congestion problem and realize the "strongest weapon" for intelligent transportation. This has also become a major development direction of intelligent traffic management.
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High-speed toll, no-stop camera, accurate identification of license plates
Traditional high-speed toll collection systems require special personnel to sit at high-speed toll gates, one-on-one-one-vehicles, and sometimes cash payments need to be changed, which is time-consuming and labor-intensive. On holidays, there are long queues at the toll gates, and good holiday time is wasted on the highway. At this stage, with the in-depth development of smart transportation, you can quickly pass the high-speed toll gate without waiting for parking. When the vehicle enters the toll entrance, the HD camera equipment in the lane will quickly capture the license plate information, upload the cloud and release the vehicle after passing the cloud verification license; after entering the highway network, the virtual logo can provide the vehicle travel path for the highway toll. Accurate calculation and splitting provide the basis; when the toll station is out, the lane equipment will again obtain the license plate information and upload it to the cloud server. After verifying that the user is a legitimate user according to the uploaded data, the command gate gate will be lifted and released, so that the vehicle can quickly exit the charge. station. After confirming that the vehicle leaves the toll booth, the cloud server calculates and splits the tolls receivable according to the information such as the entrance, exit and driving route of the vehicle, and pays the toll through the third-party interface, and completes the self-service payment of the vehicle user toll. Vehicle users can complete a complete highway express payment process through the mobile phone. With the Internet and the license plate recognition system, you don't have to wait on the highway, and you don't need to be supervised by the commissioner to enjoy smooth travel.
Parking lot does not need to be swiped to solve parking difficulties
At present, most parking lots use a card recognition system, and it is necessary to shake the window to swipe in and out. In this process, the driver will definitely stay, and it will easily cause congestion at the peak. With the acceleration of the development of China's urbanization process, the country has proposed to step up the construction of intelligent transportation for the pain point of the parking industry. The well-known domestic parking lot manufacturers have also proposed various solutions that are beneficial to parking lot management. As an indispensable item, the license plate recognition system can quickly capture the license plate number through the high-definition camera, so that the entrance gate is automatically lifted, and the system simultaneously records the stored information. The difference between the vehicle's entry time and the departure time is the vehicle's admission time. This time information will be directly transmitted to the management terminal, and then the paid fee will be directly displayed on the screen, accompanied by a voice broadcast to facilitate the owner to pay. Saving the card parking time effectively relieves the parking lot pressure during the peak period of commuting to and from work. At the same time, the vehicle identification system is combined with the Internet, which enables the owner to observe the number of parking lots in the nearby parking lot on the way, reasonably plan the parking route, and effectively solve the current situation of urban parking difficulties.
What is the license plate recognition?
The technology of license plate recognition has been used in the security industry for a long time, the technology is relatively mature, and the application of artificial intelligence improves the accuracy of license plate recognition. For manufacturers of license plate recognition algorithms, how to extend the recognition range of the target vehicle and achieve more accurate identification is required by the market. So how to choose a good license plate recognition system becomes the top priority. So what are the criteria for technically evaluating the quality of a license plate recognition system?
The first is the recognition rate of the license plate recognition system. Whether a license plate recognition system is practical or not, the most important indicator is the recognition rate. The international transportation technology department has made a special recognition rate indicator, and the requirement is that the correct recognition rate of the whole card is 24 to 95%. In order to test the recognition rate of a license plate recognition system, the system needs to be installed in a practical application environment, running 24 hours a day or more, collecting license plates for at least 1000 natural vehicles in circulation, and identifying the license plate image and identification. The results are stored for retrieval. Then, you need to get the actual vehicle image and the correct manual recognition results.
Second, the recognition speed of the license plate recognition system is also critical. The speed of recognition determines whether a license plate recognition system can meet the requirements of real-time practical applications. A system with a high recognition rate, if it takes a few seconds, or even a few minutes, to identify the result, then the system will be of no practical significance because it can not meet the real-time requirements of the actual application. For example, one of the functions of license plate recognition applications in highway toll collection is to reduce transit time, which is a powerful guarantee for reducing traffic time and avoiding traffic jams in such applications. The recognition speed proposed by international transportation technology is within 1 second, and the sooner the better.
Finally, the background management of the 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 a recognition rate of 100%. The fouling, blurring, occlusion, and weathering of the license plate may affect the license plate recognition. What needs to be done is as much as possible. The problem license plate is pre-analyzed to achieve accurate identification of the license plate.
Conclusion: After many years of development, the automatic license plate recognition system has become a relatively mature technology. It is believed that in the next few years, with the continuous application and construction of high-definition intelligent transportation systems, the automatic recognition technology of license plates will gradually develop into high-definition, integrated and intelligent, and continue to play an increasingly important role in various application systems. Contribute to the construction of smart transportation.
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