The license plate recognition is a pattern recognition technology that uses the dynamic video or static image of the vehicle to automatically identify the license plate number and license plate color. The core technologies include license plate location algorithm, license plate character segmentation algorithm and optical character recognition algorithm.
License plate recognition technology works
Vehicle detection: It can detect the passage of the vehicle through various methods such as buried coil detection, infrared detection, radar detection technology, and video detection, and triggers image capture and capture.
Image acquisition: Real-time, continuous recording and acquisition of passing vehicles through high-definition video capture.
Preprocessing: noise filtering, auto white balance, auto exposure and gamma correction, edge enhancement, contrast adjustment, etc.
License Plate Positioning: Rows are scanned on the grayscale image after image preprocessing to determine the license plate area.
Character segmentation: After the license plate area is located in the image, the character area is accurately positioned through processing such as graying and binarization, and then character segmentation is performed according to the character size feature.
Character recognition: The segmented characters are scaled, extracted, and matched with the standard character representation in the character database template.
Result output: The license plate recognition result is output in text format.
License Plate Recognition Technology Four Applications
1. The application of parking lot, residential entrance parking lot, and community entrance and exit license plate recognition technology is mainly used to record the license plate number, license plate color, and entry/exit time of vehicles to realize the automatic management of vehicles so as to save manpower and improve efficiency; The cell can automatically determine whether the entry vehicle belongs to the local cell, and implement automatic timing and charging for non-inner vehicles. In some units, this application can also be combined with the vehicle dispatch system to automatically and objectively record the vehicle's outbound condition.
The management of parking lots and residential entrances and exits is very difficult to manually remember the license plate numbers of the passing vehicles and the stopping time. It will not only cause mistakes, but also require a lot of manpower. A small license plate recognition device installed at the entrance and exit of the parking lot can solve many problems once and for all. For the license plate is blocked, broken paint, blurred and unclear, etc. can also be analyzed and identified, for the parking lot and the entrance staff to save a lot of trouble.
II. Highway Toll Stations At present, China’s highway construction is developing by leaps and bounds. Expressways extend in all directions. Each exit is provided with a toll station, which facilitates fee management on the one hand, and on the other hand can assist in the regulation of traffic on expressways. management. The application of the license plate recognition technology at the entrance and exit of the expressway toll station can greatly facilitate the identification of the license plate information of the illegally driven vehicle and effectively manage and arrest some illegal vehicles.
Toll booth bayonet bays are generally located in open air environments, and some vehicles are travelling faster. Therefore, the requirements for license plate recognition technology are very high. The traditional license plate recognition is to identify the license plates with 160P pixels. The effective image range is small and the license plate leakage rate is high, which can not meet the needs of the toll booths. Now the application of high-definition license plate recognition solves the problem of low license plate recognition rate in the past, thus providing a reliable basis for the enforcement of * and *.
A license plate recognition system is installed at the entrance and exit of the toll station. When a vehicle enters, the system recognizes the vehicle license plate and sends the identified license plate information to the designated central management server. It compares the license plate information of the suspicious vehicle with the data in the database. It can be judged whether the vehicles entering and exiting the tollgate of the expressway are stealing suspicious vehicles, which can greatly avoid the occurrence of illegal crimes and provide reference information for the cases that have occurred.
Third, in the application of the highway bayonet With the increase in the construction of highway mileage in China, the overall improvement of people's living standards, and now more and more people buy cars, causing a variety of illegal problems to the highway. The license plate recognition technology is a necessary basis for illegal penalties for vehicles. It can automatically detect and identify vehicle number plates in videos. The most typical of these is the security bayonet system. If there is no license plate recognition technology, there is no real sense of intelligence in the system. . A well-established security bayonet management system should have three major functions: license plate automatic identification, bayonet application system and central management platform. License plate recognition is the most important part of it. The merits of license plate recognition directly affect the overall performance of the bayonet system, and the recognition speed is one of its most important technical indicators. The recognition speed is fast, the system resources that need to be occupied by the system are small, the possibility of manual intervention is small, and the operating burden of the system network is also reduced correspondingly. Recognizing license plate speed is fast and accurate. The license plate recognition system can effectively achieve automatic comparison alarm and avoid a large number of false alarms. It can provide powerful and reliable information for crime detection such as anti-theft vehicles, deck vehicles, and illegal robbery vehicles.
Fourth, in the application of urban transport In recent years, with the rapid development of social economy, the rapid growth of the number of motor vehicles, road transport has become more and more busy. The contradiction between the status quo and demand for traffic management is further intensified, and traffic-related criminal and public security cases have also increased year by year. Under this circumstance, how to use advanced scientific and technological means to enhance the inspection and control of the motor vehicles and drivers in the city by the management department and provide scientific and technological means for combating all kinds of crimes and crimes is a problem that the traffic management department urgently needs to solve. .
In order to effectively curb vehicle red light violations in the city, all the intersections in the city are now installing bayonet-based red light violation detection systems. The most important component of this system is the license plate recognition module. The license plate recognition system is mainly to determine the illegality. The vehicle information captures license plate information of all vehicles and compares them with the database of *.net to analyze which vehicles are suspicious vehicles. It can also control and reduce road traffic accidents while reducing illegal activities. The application of road monitoring equipment combined with modern information network technology An intelligent network system for road monitoring has been formed to better enhance the dynamic management/control of roads and meet the business needs of the new situation of law and order, criminal investigation and traffic management.
License plate recognition technology works
Vehicle detection: It can detect the passage of the vehicle through various methods such as buried coil detection, infrared detection, radar detection technology, and video detection, and triggers image capture and capture.
Image acquisition: Real-time, continuous recording and acquisition of passing vehicles through high-definition video capture.
Preprocessing: noise filtering, auto white balance, auto exposure and gamma correction, edge enhancement, contrast adjustment, etc.
License Plate Positioning: Rows are scanned on the grayscale image after image preprocessing to determine the license plate area.
Character segmentation: After the license plate area is located in the image, the character area is accurately positioned through processing such as graying and binarization, and then character segmentation is performed according to the character size feature.
Character recognition: The segmented characters are scaled, extracted, and matched with the standard character representation in the character database template.
Result output: The license plate recognition result is output in text format.
License Plate Recognition Technology Four Applications
1. The application of parking lot, residential entrance parking lot, and community entrance and exit license plate recognition technology is mainly used to record the license plate number, license plate color, and entry/exit time of vehicles to realize the automatic management of vehicles so as to save manpower and improve efficiency; The cell can automatically determine whether the entry vehicle belongs to the local cell, and implement automatic timing and charging for non-inner vehicles. In some units, this application can also be combined with the vehicle dispatch system to automatically and objectively record the vehicle's outbound condition.
The management of parking lots and residential entrances and exits is very difficult to manually remember the license plate numbers of the passing vehicles and the stopping time. It will not only cause mistakes, but also require a lot of manpower. A small license plate recognition device installed at the entrance and exit of the parking lot can solve many problems once and for all. For the license plate is blocked, broken paint, blurred and unclear, etc. can also be analyzed and identified, for the parking lot and the entrance staff to save a lot of trouble.
II. Highway Toll Stations At present, China’s highway construction is developing by leaps and bounds. Expressways extend in all directions. Each exit is provided with a toll station, which facilitates fee management on the one hand, and on the other hand can assist in the regulation of traffic on expressways. management. The application of the license plate recognition technology at the entrance and exit of the expressway toll station can greatly facilitate the identification of the license plate information of the illegally driven vehicle and effectively manage and arrest some illegal vehicles.
Toll booth bayonet bays are generally located in open air environments, and some vehicles are travelling faster. Therefore, the requirements for license plate recognition technology are very high. The traditional license plate recognition is to identify the license plates with 160P pixels. The effective image range is small and the license plate leakage rate is high, which can not meet the needs of the toll booths. Now the application of high-definition license plate recognition solves the problem of low license plate recognition rate in the past, thus providing a reliable basis for the enforcement of * and *.
A license plate recognition system is installed at the entrance and exit of the toll station. When a vehicle enters, the system recognizes the vehicle license plate and sends the identified license plate information to the designated central management server. It compares the license plate information of the suspicious vehicle with the data in the database. It can be judged whether the vehicles entering and exiting the tollgate of the expressway are stealing suspicious vehicles, which can greatly avoid the occurrence of illegal crimes and provide reference information for the cases that have occurred.
Third, in the application of the highway bayonet With the increase in the construction of highway mileage in China, the overall improvement of people's living standards, and now more and more people buy cars, causing a variety of illegal problems to the highway. The license plate recognition technology is a necessary basis for illegal penalties for vehicles. It can automatically detect and identify vehicle number plates in videos. The most typical of these is the security bayonet system. If there is no license plate recognition technology, there is no real sense of intelligence in the system. . A well-established security bayonet management system should have three major functions: license plate automatic identification, bayonet application system and central management platform. License plate recognition is the most important part of it. The merits of license plate recognition directly affect the overall performance of the bayonet system, and the recognition speed is one of its most important technical indicators. The recognition speed is fast, the system resources that need to be occupied by the system are small, the possibility of manual intervention is small, and the operating burden of the system network is also reduced correspondingly. Recognizing license plate speed is fast and accurate. The license plate recognition system can effectively achieve automatic comparison alarm and avoid a large number of false alarms. It can provide powerful and reliable information for crime detection such as anti-theft vehicles, deck vehicles, and illegal robbery vehicles.
Fourth, in the application of urban transport In recent years, with the rapid development of social economy, the rapid growth of the number of motor vehicles, road transport has become more and more busy. The contradiction between the status quo and demand for traffic management is further intensified, and traffic-related criminal and public security cases have also increased year by year. Under this circumstance, how to use advanced scientific and technological means to enhance the inspection and control of the motor vehicles and drivers in the city by the management department and provide scientific and technological means for combating all kinds of crimes and crimes is a problem that the traffic management department urgently needs to solve. .
In order to effectively curb vehicle red light violations in the city, all the intersections in the city are now installing bayonet-based red light violation detection systems. The most important component of this system is the license plate recognition module. The license plate recognition system is mainly to determine the illegality. The vehicle information captures license plate information of all vehicles and compares them with the database of *.net to analyze which vehicles are suspicious vehicles. It can also control and reduce road traffic accidents while reducing illegal activities. The application of road monitoring equipment combined with modern information network technology An intelligent network system for road monitoring has been formed to better enhance the dynamic management/control of roads and meet the business needs of the new situation of law and order, criminal investigation and traffic management.
Solar Lights,Outdoor Solar Light Strip,Strips Solar Light,Led Solar Light
Shenzhen Huangtai Photoelectric Co.,Ltd. , https://www.szhtleds.com