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. This technology is commonly used in parking lots and community entrances, highway toll stations, highway bayonet and city traffic.
Vehicle License Plate Recognition (VLPR) refers to a technology that can detect vehicles on monitored roads and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals, and number plate colors) for processing. The license plate recognition is one of the important components in the modern intelligent transportation system and it is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, it analyzes the images or video sequences of the vehicles captured by the camera to obtain the unique license plate number of each vehicle, thereby completing the recognition process. Through some follow-up processing methods, it can realize the functions of parking lot charging management, traffic flow control index measurement, vehicle positioning, car theft prevention, highway speeding automatic supervision, red light electronic*, highway toll station and so on. For the maintenance of traffic safety, urban security, and prevention of traffic jams, the realization of automated traffic management has practical significance.
The license plate number is the only “identity†logo of the vehicle. The automatic license plate recognition technology can automatically register and verify the “identity†of the car without any changes to the car. This technology has been applied to highway toll collection, parking management, and weighing. System, traffic guidance, traffic enforcement, highway inspection, vehicle scheduling, vehicle detection and other occasions.
Here are some examples of applications:
- Monitoring alarm
For vehicles that are included in the "black list", such as vehicles that are wanted or reported missing, underpayment vehicles, vehicles that do not have annual inspections, accidents escaping and illegal vehicles, etc., simply enter their license plate number into the application system, and the license plate recognition equipment is installed. At designated junctions, bayonet or by law enforcement officers, they can be placed as required. The system will read all the vehicle's license plate numbers and compare them with the “black list†in the system. Once the designated vehicle is detected, an alarm message will be sent out immediately. The system can work uninterrupted throughout the day, without fatigue, with a very low error rate; it can adapt to high-speed vehicles; it can complete tasks in the vehicle without affecting normal traffic; the driver will not be aware of the entire monitoring process and high confidentiality. . Applying such a system will greatly increase the efficiency of law enforcement.
——Speeding violation penalty
The license plate recognition technology combined with the speed measuring device can be used for speeding violations of vehicles and is generally used for expressways. The specific applications are: setting speed monitoring points on the road, capturing speeding vehicles and identifying license plate numbers, sending license plate numbers and pictures of illegal vehicles to various exits; setting penalties at each exit, using vehicle license plate recognition devices to identify passing vehicles and numbering Compare with the number of speeding vehicles that have been received. Once the numbers are the same, an alert device is activated to notify law enforcement officers. Compared with traditional speed monitoring methods, this application can save the police force, reduce the work intensity of law enforcement personnel, and it is safe, efficient, and hidden. The driver must always remind himself that he can not speed, and greatly reduce the accident caused by speeding.
- Vehicle Access Management
The license plate recognition equipment is installed at the entrance and exit, record the license plate number and the entry and exit time of the vehicle, and combine it with the control equipment of automatic doors and barriers to realize the automatic management of the vehicle. Applied to the parking lot can realize automatic time-based charging, and can also automatically calculate the number of available parking spaces and give hints. The automatic parking fee management can save manpower and improve efficiency. The application to the smart community can automatically determine whether the entry vehicle belongs to the local cell and implement automatic timing and charging for non-interior vehicles. In some units, this kind of application can also be combined with the vehicle dispatching system to automatically and objectively record the vehicle's outbound condition. H3 Smart uses the license plate recognition technology in the traffic management system to achieve no parking and exemption from cards. Improve the efficiency of vehicle access.
- Automatic release
The designated license plate information is entered into the system, and the system automatically reads the license plate of the passing vehicle and queries the internal database. For vehicle systems that require automatic release, they are driven by electronic gates or barriers to allow them to pass. Warnings are given to other vehicle systems and are handled by on-duty personnel. Can be used for special units (such as military administrative areas, confidential units, key protection units, etc.), road and bridge charge bayonet, and advanced residential areas.
- Freeway toll management
License plate recognition equipment is installed at each entrance of the expressway. When the vehicle enters, the vehicle license plate is identified and the entrance data is stored in the toll collection system. When the vehicle reaches the exit, the license plate is identified again and the entrance information is called according to the license plate information. The entrance and exit data are used to realize the toll management. This application can realize automatic billing and can prevent cheating, thus avoiding the loss of receivables.
The highway has begun to implement the networking fees. With the expansion of the scope of networking, the difference between the fees of different models is also increasing. The problem of drivers using the loopholes in the existing fee collection system to evade payment through midway exchange will become more and more prominent. License plate recognition technology is the fundamental method to solve such problems.
- Calculate vehicle travel time
In the traffic management system, the average travel time of a vehicle on a road can be used as a parameter for judging the road congestion condition. The license plate recognition equipment is installed at the starting and ending point of the road, and all passing vehicles are read and the license plate number is transmitted back to the traffic command center. Based on these results, the command center management system can calculate the average travel time of the vehicle.
- Automatic registration of license plates
The traffic supervision department handles a large number of images of illegal vehicles every day. Usually, the number of the license plate is manually identified and then input into the management system. This method has a large workload and is prone to fatigue and misjudgment. Using automatic identification can reduce the work intensity and can greatly improve the processing speed and efficiency. This feature can be used for electronic * systems, road monitoring systems.
The license plate recognition car park management system automatically recognizes and converts the vehicle license plate number image captured by the camera at the entrance into a digital signal. To achieve one card and one vehicle, the advantage of license plate recognition is that it can associate the card with the car, so that the management can be improved by one grade. The corresponding advantages of the card and the car are that the long-term card must be used together with the car to eliminate the use of one card and multiple vehicles. Vulnerabilities improve the benefits of property management; at the same time, they automatically compare incoming and outgoing vehicles to prevent theft. The upgraded camera system can capture clearer images and save them as files, which can provide strong evidence for disputes. It facilitates management personnel to compare the vehicles when they appear on the market, which greatly enhances the security of the system.
The auto license plate recognition technology 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. Through the collection and processing of images, the automatic license plate recognition function is completed. The license plate image can be automatically extracted from an image, and the characters are automatically segmented to further identify the characters. The hardware basis generally includes the trigger device (monitoring whether the vehicle enters the field of view), Camera equipment, lighting equipment, image acquisition equipment, identification number processor (such as computers).
Vehicle License Plate Recognition (VLPR) refers to a technology that can detect vehicles on monitored roads and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals, and number plate colors) for processing. The license plate recognition is one of the important components in the modern intelligent transportation system and it is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, it analyzes the images or video sequences of the vehicles captured by the camera to obtain the unique license plate number of each vehicle, thereby completing the recognition process. Through some follow-up processing methods, it can realize the functions of parking lot charging management, traffic flow control index measurement, vehicle positioning, car theft prevention, highway speeding automatic supervision, red light electronic*, highway toll station and so on. For the maintenance of traffic safety, urban security, and prevention of traffic jams, the realization of automated traffic management has practical significance.
The license plate number is the only “identity†logo of the vehicle. The automatic license plate recognition technology can automatically register and verify the “identity†of the car without any changes to the car. This technology has been applied to highway toll collection, parking management, and weighing. System, traffic guidance, traffic enforcement, highway inspection, vehicle scheduling, vehicle detection and other occasions.
Here are some examples of applications:
- Monitoring alarm
For vehicles that are included in the "black list", such as vehicles that are wanted or reported missing, underpayment vehicles, vehicles that do not have annual inspections, accidents escaping and illegal vehicles, etc., simply enter their license plate number into the application system, and the license plate recognition equipment is installed. At designated junctions, bayonet or by law enforcement officers, they can be placed as required. The system will read all the vehicle's license plate numbers and compare them with the “black list†in the system. Once the designated vehicle is detected, an alarm message will be sent out immediately. The system can work uninterrupted throughout the day, without fatigue, with a very low error rate; it can adapt to high-speed vehicles; it can complete tasks in the vehicle without affecting normal traffic; the driver will not be aware of the entire monitoring process and high confidentiality. . Applying such a system will greatly increase the efficiency of law enforcement.
——Speeding violation penalty
The license plate recognition technology combined with the speed measuring device can be used for speeding violations of vehicles and is generally used for expressways. The specific applications are: setting speed monitoring points on the road, capturing speeding vehicles and identifying license plate numbers, sending license plate numbers and pictures of illegal vehicles to various exits; setting penalties at each exit, using vehicle license plate recognition devices to identify passing vehicles and numbering Compare with the number of speeding vehicles that have been received. Once the numbers are the same, an alert device is activated to notify law enforcement officers. Compared with traditional speed monitoring methods, this application can save the police force, reduce the work intensity of law enforcement personnel, and it is safe, efficient, and hidden. The driver must always remind himself that he can not speed, and greatly reduce the accident caused by speeding.
- Vehicle Access Management
The license plate recognition equipment is installed at the entrance and exit, record the license plate number and the entry and exit time of the vehicle, and combine it with the control equipment of automatic doors and barriers to realize the automatic management of the vehicle. Applied to the parking lot can realize automatic time-based charging, and can also automatically calculate the number of available parking spaces and give hints. The automatic parking fee management can save manpower and improve efficiency. The application to the smart community can automatically determine whether the entry vehicle belongs to the local cell and implement automatic timing and charging for non-interior vehicles. In some units, this kind of application can also be combined with the vehicle dispatching system to automatically and objectively record the vehicle's outbound condition. H3 Smart uses the license plate recognition technology in the traffic management system to achieve no parking and exemption from cards. Improve the efficiency of vehicle access.
- Automatic release
The designated license plate information is entered into the system, and the system automatically reads the license plate of the passing vehicle and queries the internal database. For vehicle systems that require automatic release, they are driven by electronic gates or barriers to allow them to pass. Warnings are given to other vehicle systems and are handled by on-duty personnel. Can be used for special units (such as military administrative areas, confidential units, key protection units, etc.), road and bridge charge bayonet, and advanced residential areas.
- Freeway toll management
License plate recognition equipment is installed at each entrance of the expressway. When the vehicle enters, the vehicle license plate is identified and the entrance data is stored in the toll collection system. When the vehicle reaches the exit, the license plate is identified again and the entrance information is called according to the license plate information. The entrance and exit data are used to realize the toll management. This application can realize automatic billing and can prevent cheating, thus avoiding the loss of receivables.
The highway has begun to implement the networking fees. With the expansion of the scope of networking, the difference between the fees of different models is also increasing. The problem of drivers using the loopholes in the existing fee collection system to evade payment through midway exchange will become more and more prominent. License plate recognition technology is the fundamental method to solve such problems.
- Calculate vehicle travel time
In the traffic management system, the average travel time of a vehicle on a road can be used as a parameter for judging the road congestion condition. The license plate recognition equipment is installed at the starting and ending point of the road, and all passing vehicles are read and the license plate number is transmitted back to the traffic command center. Based on these results, the command center management system can calculate the average travel time of the vehicle.
- Automatic registration of license plates
The traffic supervision department handles a large number of images of illegal vehicles every day. Usually, the number of the license plate is manually identified and then input into the management system. This method has a large workload and is prone to fatigue and misjudgment. Using automatic identification can reduce the work intensity and can greatly improve the processing speed and efficiency. This feature can be used for electronic * systems, road monitoring systems.
The license plate recognition car park management system automatically recognizes and converts the vehicle license plate number image captured by the camera at the entrance into a digital signal. To achieve one card and one vehicle, the advantage of license plate recognition is that it can associate the card with the car, so that the management can be improved by one grade. The corresponding advantages of the card and the car are that the long-term card must be used together with the car to eliminate the use of one card and multiple vehicles. Vulnerabilities improve the benefits of property management; at the same time, they automatically compare incoming and outgoing vehicles to prevent theft. The upgraded camera system can capture clearer images and save them as files, which can provide strong evidence for disputes. It facilitates management personnel to compare the vehicles when they appear on the market, which greatly enhances the security of the system.
The auto license plate recognition technology 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. Through the collection and processing of images, the automatic license plate recognition function is completed. The license plate image can be automatically extracted from an image, and the characters are automatically segmented to further identify the characters. The hardware basis generally includes the trigger device (monitoring whether the vehicle enters the field of view), Camera equipment, lighting equipment, image acquisition equipment, identification number processor (such as computers).
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