What Is the Use of the Number Plate Recognition System

In the world of today, where the technology is constantly evolving, it is hard to keep a track of the various crimes and thefts that are happening. Especially when it comes to vehicle theft, it is often very difficult to track down vehicles, which are stolen all of a sudden, and they can never be easily recovered.In the year of 1976, a new technology evolved from behind the scene and it was known to be the ANPR or the automatic number plate recognition system.

What Is the Use of the Number Plate Recognition System 1

The ANPR or the automatic number plate recognition system is today used for many tasks as in synchronization with cameras and mobile phones. Several objects of lighting such as the Appian strobe light etc is used with the technology of the number plate recognition.The number plate recognition system is used for many a reason.

Firstly, it is often used for collection of electronic toll taxes and also for maintaining the parking laws, rules and regulation. Secondly, in case of maintaining the traffic rules such as taking the details of the driver with the car who is driving above a particular speed limit can easily be executed by using the ANPR technology.The Appian strobe light in this case is a wonderful piece of technology, which is particularly used for surveillance purposes.

The Appian strobe light is particularly used in high security areas and also by several police vehicles in maintaining the traffic laws.The ANPR or the number plate recognition technology is now a day used by several countries such as by the England, Scotland, Ireland, Germany etc. In these countries, the technology has become quite famous in no time and for this reason, several companies have come up offering products related to patrol and surveillance, which are particularly based on the ANPR technology.

The automatic number plate recognition may be an instant hit with the police of various countries and in areas where high security and surveillance is required, however, such a system have got its own disadvantages.Firstly, in case of the ANPR or the automatic number plate recognition system, the images of the number plate or of any object which is taken by using the optical character reader technology may get blurred mainly due to the reason of motion blurring for which the picture seems to be hazy when uploaded in the database.Secondly, the technology often uses low-resolution images for which the images are not actually visible properly in every case.

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License plate recognition system:Lpr parking system
License plate recognition system:Lpr parking system
License plate recognition system(Lpr parking system) by:Shenzhen TGW Technology Co.,Ltd what is License plate recognition system(lpr parking system)? License plate recognition system(LPR parking system) is a technology that can detect vehicles on the monitored road surface and automatically extract vehicle License plate information (English letters, Arabic numerals and plate color) for processing.License plate recognition is one of the important components of modern intelligent transportation system, which is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, it analyzes vehicle images or video sequences taken by LPR camera to obtain the unique license plate number of each vehicle, thus completing the recognition process. Through some follow-up processing methods, parking lot charge management, traffic flow control index measurement, vehicle positioning, vehicle anti-theft, automatic supervision of highway overspeed, electronic police running red lights, highway toll stations and other functions can be realized.It is very useful for maintaining traffic safety and city security, preventing traffic jam and realizing traffic automation management Features of Shenzhen TGW Technology Co.,Ltd License plate recognition system. 1.ur ALPR system have a Simple structure, stable operation, which can automatic lift the Barrier Gate, and it is convenient to be installed and maintained 2Adoting crank and linkage mechanism transmission, reducing mechanical failure, low noise and no pollutionA special manual power-off and automatic lever lifting device is adopted in our ANPR system. This way, even in the event of a power failure, the Barrier Gate can be lifted manually. At the same time, the parking access control has a variety of control methods to support line control. Such as Remote control, communication protocol and other control methods 3.Our inligent parking access controls have the function of preventing smashing vehicles, effectively preventing the brake lever from accidentally hurting vehicles and pedestrians.   The working principle of license plate recognition   1.Vehicle detection: Various methods such as buried coil detection, infrared detection, radar detection technology, and barrier gate video detecting can be used to sense the passing of the 2.vehicle and trigger image collection and capture.  3.Image collection: Real-time, uninterrupted recording, and collection of passing vehicles through high-definition lpr camera . 4.Preprocessing: Noise filtering, auto white balance, auto exposure and gamma correction, edge enhancement, contrast adjustment, etc. 5.License plate positioning: Force scanning is performed on the gray images in the future through image preprocessing to determine the license plate area. 6.Character cutting: After locating the license plate area in the image, through graying barriers, binarization, etc., the bit character area is accurately determined, and then character cutting is performed according to the character scale characteristics. 7.Character recognition: Scaling and feature extraction of the cut characters, matching with the standard character expression form in the character database template.  8.Effect output: Output the effect of license plate recognition in text format. Alpr license plate reader in action     Major application scenarios of license plate recognition 1.parking lot and community entrance The application of parking plate and community entrance and exit license plate recognition technology is mainly used to record the vehicle license plate number, license plate color, and time of entry and exit, and to complete the automatic processing of the vehicle in order to save manpower and forward power; for example, it can be used to distinguish between entering vehicles in smart communities. Is it due to the community, the automatic timing of toll gates for the completion of non-internal vehicles? In some units, this application can also be linked with the vehicle dispatching system to automatically and objectively record the vehicle out of the unit. It is very difficult to manually record the license plate number and parking time of the traveling vehicle by the parking lot and the entrance and exit of the community. Not only errors will occur, but also a lot of manpower needs to be invested. A small license plate recognition device can handle many questions at the entrance and exit of the parking lot. The license plate is blocked, the paint is cracked, and the blur can be analyzed and identified, which saves a lot of trouble for the staff at the parking lot and the entrance. 2.expressway Toll Station Nowadays, thousands of miles of highways are being built, and the highways are unobstructed. Each exit is provided with a toll station, which facilitates toll collection on the one hand and helps traffic police to standardize the traffic on the highway. The application of the license plate recognition technology at the entrances and exits of highway toll stations can greatly facilitate traffic police to identify the license plate information of illegally trekking vehicles and to effectively handle and arrest some illegal vehicles. The toll gate is generally located in an open-air environment, coupled with some vehicles traveling fast, so the requirements for license plate recognition technology are very high. Traditional license plate recognition is about 160P pixel license plate recognition. Useful image planning is small, the license plate miss rate is high, and it cannot meet the needs of the toll station bayonet. Now the application of high-definition license plate recognition has dealt with the question of the low license plate recognition rate, thus providing a reliable basis for the law of public security and traffic police. The license plate recognition system is installed at the entrance and exit of the toll booth. When a vehicle enters, the system recognizes the license plate of the vehicle and sends the recognized license plate information to the designated base processing server. By comparing it with the theft of the suspected vehicle in the database, It can be judged whether the road gate vehicles entering or exiting the toll gate of the expressway are stealing suspicious vehicles, which can greatly avoid the occurrence of illegal and illegal incidents and see the information about the work supply that has occurred. 3.Law enforcement With the increase in the number of roads created by our country and the overall improvement of people's living standards, the number of people who buy cars now is keeping increasing, posing various illegal questions to the highway. As a necessary basis for illegal vehicle punishment, the license plate recognition technology can automatically check and identify the vehicle number plate in the video. The most typical one is the security checkpoint system. This system assumes that without the license plate recognition technology, there is no real intelligence Into. A complete security bayonet processing system should have three primary functions of automatic license plate recognition, bayonet application system and base processing channel. The license plate recognition is the most important part in the meantime. The quality of the license plate recognition directly affects the overall function of the bayonet system, and the recognition speed is its most important technical indicator. The recognition speed is fast, the system requirements occupy fewer system resources, the possibility of manual intervention is small, and the work burden of the system network is correspondingly reduced. The recognition of the license plate is fast and accurate. The license plate recognition system is intelligent and useful to complete the automatic comparison alarm to avoid many false alarms. It can provide powerful and reliable crack detection information for anti-theft vehicles, deck vehicles illegally grabbed vehicles and other illegal crime detection. 4.urban traffic In recent years, with the rapid development of society and the economy, the rapid increase in the number of motor vehicle barriers, road transportation has become more and busier. The hostility of traffic handling status and needs has further intensified, and criminal and public security cases related to traffic have also increased year by year. Under this circumstance, how to use preemptive technology to strengthen the police's investigation and control of motor vehicles and drivers in the city, and to provide technology for impacting various illegal and illegal acts is a question that the police's traffic processing department needs to deal with urgently.   Three solutions for dealing with license plate recognition machine errors There is generally only a few common errors of the license plate recognition equipment, but ordinary car owners do not know what to do when they encounter such errors. Let ’s take a look at how to deal with these errors. First , the ground sense coil is not responding When the owner drove in front of the smart barrier gate, the barrier did not open automatically. At this time, the ground sense coil may be malfunctioning. Without sensing the arrival of your car, the license plate recognition management system will not be able to identify the chargeback. At this time, the owner should try to retreat the vehicle until it exits the sensing range, and then wait a few minutes before trying again. Generally, if the ground sensing coil is defective, the barrier will be reopened. Second, the vehicle number plate problem         If you still encounter a situation where the smart barrier does not open automatically, try to step back and wait a few minutes and try again. If the smart barrier does not open, you need to get out of the vehicle and check if your vehicle number plate is affected. It ’s damaged, so serious that the license plate recognition system ca n’t recognize it. You can get off the car and deal with the vehicle number plate. Finally,Insufficient balance         After the first test fails, and it is determined that the number plate of the vehicle is not damaged, but the intelligent barrier for plate identification cannot be opened. This may be because the balance of the account balance is insufficient, which causes the license plate recognition management system to be unable to perform chargeback, and the program cannot be run. The system will not open the smart barrier for you to pass. We do not need to panic when encountering many aspects of machine failure. After all, machines are made by humans. There is nothing we can't solve!   How to improve the recognition accuracy of license plate recognition system First, it is necessary to ensure that the ambient light in the parking lot is bright enough. For dark or nighttime, some supplementary lighting equipment should be appropriately added;   Second, ensure that the license plates of vehicles entering and leaving the parking lot are intact so that the license plates of each vehicle entering and leaving the stadium can be captured;   The last, ensure the license plate recognition position, the size of the license plate pixels, not less than the size of the best license plate pixels;   Below is a introduction for you to learn more about LPR parking system. LPR Parking system is generally composed of three parts: entrance equipment, exit equipment and management center The entrance equipment generally includes ticket box, IC/ID card reading system, access control, ground sensor coil, vehicle detector, voice broadcast system, automatic card issuing system, intercom system, power supply;   The exit device is similar to the entrance device, but there is no automatic card issuing system at the entrance. Because our equipment can realize the offline charging function, there is a gate control system at the exit.   The management center is the main facility for keeping records in the parking system. It mainly includes management computers, management software and card issuers.   of course, Above is the simplest LPR parking system. nowadays due to the increase of people's needs on parking, and in order to be able to provide safer and more convenient parking mode,people increase a lot of new features to LPR parking system, such as image contrast , license plate automatic recognition, etc., to increase the function of image contrasting, we will need a camera, light, and U clamp fixed to the equipment, stents, pillar these devices, but these are optional according to customer requirements. In addition, we know that the current intelligent parking system also includes parking guidance, reverse car search, self-service payment, mobile phone inquiry, parking space reservation, mobile payment, etc., so according to the different requirements of customers, we provide customers with high, medium and low-end equipment as a professional parking system manufacturers.   Some common sense you need to know before installing a LPR parking system LPR Parking system is the best partner for managing vehicles in the parking lot. It is also the right-hand man of the parking lot management staff. It is a necessity in almost every parking lot. Below are a few things you should know before installing a lpr parking system   1.we should build different lpr parking system management mode according to the different size of the parking lot.there are several alternative mode, such as the mode designed for bluetooth remote reading card system and automatic license plate number recognition, But anyway, we should choose a lpr parking system with a stable performance.   2. We determine the size of the safety island According to the width of parking lot entrance.   3, with the development of technology, parking charge system functions are also constantly updating, in order to satisfy people, we must choose LPR parking system which can be expanded, in order to convenient subsequent equipment upgrading, we must choose system providers with research and development ability. 4. In order to ensure the stable operation of the equipment in the subsequent process, the performance of each part of the lpr parking system must be stable.   5. The lpr parking system shall be simple enough to install and enough convenient to debug. Meanwhile, the performance of the parking system should not depending on the external environment.   You can learn more about License plate recognition system at Wikipedia . Shenzhen TGW Technology Co.,Ltd provides the best solution of License plate recognition system , Lpr parking system to more than 120 countries on the the world.If you need a solution,please contact us .        
Intelligent license plate recognition device assists in managing the huge traffic flow
Intelligent license plate recognition device assists in managing the huge traffic flow
by:Shenzhen TGW Technology Co.,Ltd Nowadays, with the improvement of people ’s quality of life, many people begin to enjoy life. Every holiday area is crowded with people. People usually choose to travel by car or group tours, but in the crowded scenic area, people who come by car It is not easy to find a parking place. To solve the problems of parking in the scenic area and queuing of vehicles, most parking lots in the scenic area have introduced a license plate recognition system to solve the problem of parking in the scenic area.   The new method of vehicle identity authentication   The intelligent license plate recognition management system relies on the license plate recognition technology to accurately recognize the license plate information of vehicles entering and exiting the scenic area parking lot. It can record the time of vehicle entry and exit and automatically charge. Users pay a mobile payment.   The license plate recognition system can not only increase the speed of vehicle recognition, but also improve the efficiency of parking payment, and help to relieve the pressure of parking lots during holidays. This system can ensure the unimpeded import and export even when there is a large traffic volume, effectively solve the problem of reducing the vehicle queues, and self-driving travelers can travel with confidence.   Realize unmanned management of scenic parking lot   With the advent of the era of intelligent identification, intelligent identification technology will gradually replace manual identification. From military to civilian, and from enterprises to individuals, the coverage of intelligent identification systems will become larger and larger.   In response to the congestion of parking lot entrances and exits, an intelligent license plate recognition system will help the construction of "unmanned parking lots" in the scenic spot, replacing traditional manual identification and payment, and greatly liberating manpower and material resources of the parking lot and speeding up work efficiency. We are a License plate recognition company which specialize in ALPR system , ( License plate recognition ),we offer ALPR solution all around the world.Click the links bellow to learn more about our products! ALPR software , ALPR camera , ALPR hardware , license plate recognition system , LPR camera You can also learn more about ALPR at Wikipedia
Application of the license plate recognition system
Application of the license plate recognition system
Application scenarios of license plate recognition system by:Shenzhen TGW Technology Co.,Ltd License plate recognition technology is used to extract and recognize a license plate from a car in motion, The complete work principle includes license plate extraction, image preprocessing, feature extraction, and license plate character recognition. At present, the license plate recognition accuracy of leading ALPR system can reach a rate of 99.7%. The license plate recognition system combined with a toll collection system so that  car owners don't need to stop when they pass through a crossing .It realize automatic identification of vehicle numbers and automatic toll collection in a easy way. Using the smart parking recognition system, you can work offline by using an embedded integrated design.Such as add the license plate recognition technology algorithm to a camera, or set up a black and white list to manage vehicles, then we can realize allowing VIP members to pass freely while disallow nonmember to pass without paying . 1. Smart parking system The license plate recognition system is installed at the entrance and exit of the smart parking lot, it records the license plate number of vehicles and the time when vehicles enter or leave, and is combined with the control equipment of automatic gates and railing machines. License plate recognition system can realize automatic time-based charging.It can also automatically calculate the number of available parking spaces and give tips to realize automatic management of parking charges to save manpower and improve efficiency. The license plate recognition system is used in intelligent communities, which can automatically determine whether the coming vehicles belong to this community, and realize automatic timing and charging for nonmember vehicles. The intelligent license plate recognition parking lot charging system achieve passing wuihout cards, which effectively improves the efficiency of vehicle access. 2. Monitor and alarm If you want to check whether a car is included in the "blacklist", such as: wanted or reported vehicles, unpaid vehicles, vehicles under annual inspection, accident and escape vehicles, etc., just enter the license plate number into the management system.The system is installed at designated intersections, checkpoints or carried by law enforcement officers at any time. The license plate recognition technology will identify all license plate numbers of passing vehicles and compare them with the "blacklist" in the system. Once a designated vehicle is found,an alarm message will be issued immediately... The license plate recognition system can work continuously throughout the day, without fatigue, and with extremely low error rates; it can adapt to moving vehicles; it can complete license plate recognition without affecting normal traffic, and the driver will not be affected during the entire monitoring process Sensitive and confidential. Application of license plate recognition technology will greatly improve the efficiency of law enforcement. More application Industry of License Plate Recognition System 1.Recognition and monitoring of license plates at the entrance and exit of the parking lot; 2.Identification and monitoring of license plates at highway entrances and exits; 3. License plate identification and monitoring at the entrance and exit of the mall; 4.Identification and monitoring of license plates at the entrances and exits of government agencies, enterprises and institutions; 5. Weighing charges. The extensive application of the license plate recognition system has greatly helped vehicle management and parking billing of parking lots, such as parking lots in residential quarters. This has also contributed a lot to smart transportation. Dimon artificial intelligence shared a parking solution includes smart on-street parking, smart parking lot, three-dimensional parking garage, shared parking, new energy charging pile, and other subsystems. As a city-level smart parking solution, this solution is based on a “high-level video + palm parking app + AI parking management cloud platform” as a framework, a set of high-level video The device can manage 8-12 parking spaces, and the license plate recognition rate is as high as 99.99%. It can automatically store users' on-street parking videos and image records. It provides a complete evidence chain for handling illegal parking, recovering evasion and leakage, and solves traditional parking. Problems such as low management efficiency, manual labor, cumbersome operation, and poor user experience. Also, Dimon's artificial intelligence shared parking uses on-street parking as a fulcrum, which can completely open up on-street parking resources, and comprehensively link the city's public bus travel system, traffic command system, public security monitoring system, and traffic police enforcement system to realize a city platform, One network, integration, intelligent parking management and platform sharing, parking space sharing, and data sharing have completely overturned the traditional parking management model. We are a License plate recognition company which specialize in ALPR system , ( License plate recognition ),we offer ALPR solution all around the world.Click the links bellow to learn more about our products! ALPR software , ALPR camera , ALPR hardware , license plate recognition system , LPR camera You can also learn more about ALPR at Wikipedia
Working principle and application scenario of license plate recognition system
Working principle and application scenario of license plate recognition system
by:Shenzhen TGW Technology Co.,Ltd Working principle and application scenario of license plate recognition system The license plate recognition system is an application of computer video image recognition technology in vehicle license plate recognition. License plate recognition is widely used in highway vehicle management and electronic toll collection systems. It is also the main means of identifying vehicle identity in combination with DSRC technology. The license plate recognition technology requires that a license plate in motion can be extracted and recognized from a complex background, and vehicle license plate recognition, image pre-processing, feature extraction, license plate character recognition and other technologies should be used to identify vehicle license plate and color information.  In parking lot management, license plate recognition technology is also the main method to identify the identity of a vehicle. License plate recognition technology combined with electronic non-parking toll system (ETC) to identify vehicles, allowing vehicles to pass through the crossing without having to stop to realize automatic identification and charging of vehicles. In the management of the parking lot, in order to improve the efficiency of vehicle traffic at the entrance and exit, the license plate recognition aims at vehicles that do not charge parking fees (such as monthly trucks and free internal vehicles), and establish unmanned fast lanes to avoid the need for cards and parking. Change the management mode of access to parking lots. Working principle of license plate recognition parking system Nowadays, with the gradual expansion of urban vehicle crowds, many road junctions or parking lots have adopted intelligent license plate recognition technology, and the most prominent performance is that they are used in parking lots. Now many communities, commercial squares, shopping centers, airports, etc Each major parking lot has been transformed, from the traditional card parking system to the smart license plate recognition parking system. Then, what are the principles and applications of license plate recognition in the parking system? Let ’s take a look together. First, the working principle of license plate recognition in the parking lot system 1. Vehicle viewing: Various methods such as buried coil viewing, infrared viewing, radar viewing technology, and barrier gate video viewing can be used to sense the passing of the vehicle and trigger image collection and capture. 2. Image collection: Real-time, uninterrupted recording, and collection of passing vehicles through high-definition camera capture host. 3. Preprocessing: Noise filtering, auto white balance, auto exposure and gamma correction, edge enhancement, contrast adjustment, etc. 4. License plate positioning: Force scanning is performed on the gray images in the future through image preprocessing to determine the license plate area. 5. Character cutting: After locating the license plate area in the image, through graying barriers, binarization, etc., the bit character area is accurately determined, and then character cutting is performed according to the character scale characteristics. 6. Character recognition: Scaling and feature extraction of the cut characters, matching with the standard character expression form in the character database template. 7. Effect output: Output the effect of license plate recognition in text format. Detailed working principle of license plate recognition parking system Two, four major applications of license plate recognition 1, Parking lot and community entrance The application of parking plate and community entrance and exit license plate recognition technology is mainly used to record the vehicle license plate number, license plate color, and time of entry and exit, and to complete the automatic processing of the vehicle in order to save manpower and forward power; for example, it can be used to distinguish between entering vehicles in smart communities. Is it due to the community, the automatic timing of toll gates for the completion of non-internal vehicles? In some units, this application can also be linked with the vehicle dispatching system to automatically and objectively record the vehicle out of the unit. It is very difficult to manually record the license plate number and parking time of the traveling vehicle by the parking lot and the entrance and exit of the community. Not only errors will occur, but also a lot of manpower needs to be invested. A small license plate recognition device can handle many questions at the entrance and exit of the parking lot. The license plate is blocked, the paint is cracked, and the blur can be analyzed and identified, which saves a lot of trouble for the staff at the parking lot and the entrance. 2, Expressway Toll Station Nowadays, China's highways are being built for thousands of miles, and the highways are unobstructed. Each exit is provided with a toll station, which facilitates toll collection on the one hand and helps traffic police to standardize the traffic on the highway. The application of the license plate recognition technology at the entrances and exits of highway toll stations can greatly facilitate traffic police to identify the license plate information of illegally trekking vehicles and to effectively handle and arrest some illegal vehicles. 卡 The toll gate is generally located in an open-air environment, coupled with some vehicles traveling fast, so the requirements for license plate recognition technology are very high. Traditional license plate recognition is about 160P pixel license plate recognition. Useful image planning is small, the license plate miss rate is high, and it cannot meet the needs of the toll station bayonet. Now the application of high-definition license plate recognition has dealt with the question of the low license plate recognition rate, thus providing a reliable basis for the law of public security and traffic police. The license plate recognition system is installed at the entrance and exit of the toll booth. When a vehicle enters, the system recognizes the license plate of the vehicle and sends the recognized license plate information to the designated base processing server. By comparing it with the theft of the suspected vehicle in the database, It can be judged whether the road gate vehicles entering or exiting the toll gate of the expressway are stealing suspicious vehicles, which can greatly avoid the occurrence of illegal and illegal incidents and see the information about the work supply that has occurred. 3. Application in highway bayonet With the increase in the number of roads created by our country and the overall improvement of people's living standards, the number of people who buy cars now continues to increase, posing various illegal questions to the highway. As a necessary basis for illegal vehicle punishment, the license plate recognition technology can automatically check and identify the vehicle number plate in the video. The most typical one is the security checkpoint system. This system assumes that without the license plate recognition technology, there is no real intelligence Into. 完善 A complete security bayonet processing system should have three primary functions of automatic license plate recognition, bayonet application system and base processing channel. The license plate recognition is the most important part in the meantime. The quality of the license plate recognition directly affects the overall function of the bayonet system, and the recognition speed is its most important technical indicator. The recognition speed is fast, the system requirements occupy fewer system resources, the possibility of manual intervention is small, and the work burden of the system network is correspondingly reduced. The recognition of the license plate is fast and accurate. The license plate recognition system is intelligent and useful to complete the automatic comparison alarm to avoid many false alarms. It can provide powerful and reliable crack detection information for anti-theft vehicles, deck vehicles illegally grabbed vehicles and other illegal crime detection. Detailed working principle of license plate recognition parking system 4. Application in urban transportation In recent years, with the rapid development of society and the economy, the rapid increase in the number of motor vehicle barriers, road transportation has become more and busier. The hostility of traffic handling status and needs has further intensified, and criminal and public security cases related to traffic have also increased year by year. Under this circumstance, how to use preemptive technology to strengthen the police's investigation and control of motor vehicles and drivers in the city, and to provide technology for impacting various illegal and illegal acts is a question that the police's traffic processing department needs to deal with urgently. Nowadays, the license plate recognition parking lot system is currently considered to be a set of parking lot management systems that are more convenient to manage and vehicles pass quickly. Because of its advantages such as high recognition rate and fast traffic, it has been favored by many users. However, in order to better manage the parking lot and the problem of parking difficulties, the parking lot system is constantly upgraded and the functions are constantly increasing. Of course, the license plate recognition technology must not fall behind. The license plate recognition system will definitely bring a lot of convenience to the management of the parking lot system. We are a License plate recognition company which specialize in ALPR system , ( License plate recognition ),we offer ALPR solution all around the world.Click the links bellow to learn more about our products! ALPR software , ALPR camera , ALPR hardware , license plate recognition system , LPR camera You can also learn more about ALPR at Wikipedia
License plate recognition principle
License plate recognition principle
License plate recognition working principle  by:Shenzhen TGW Technology Co.,Ltd The license plate recognition technology is based on the image segmentation, image recognition theory .The technology is used to analyzes images containing a number plate to determine the position of the license plate and further extracts and recognizes the text characters.   A typical license plate recognition process includes image acquisition, image pre-processing, license plate positioning, character segmentation, character recognition, and result output. Per process is complementary to each other. All process must ensure its high efficiency and high anti-interference ability. Only in this way can the identification processing achieve a satisfactory result.   There are two main ways to implement the license plate recognition system, one still images recognition, and the other is dynamic video stream recognition. Image recognition is limited by factors such as image quality, license plate defacement, and license plate tilt. Dynamic video stream recognition requires faster recognition speed, which is limited by the performance indicators of the processor, especially when we want to realize real-time license plate recognition on mobile terminals,it requires more performance optimization.   Although the license plate recognition includes six major processes, the core algorithm is only located in three modules: license plate positioning, character segmentation, and character recognition.   License plate positioning   The main task of license plate positioning is to find the area of license plate from the still picture or video frame and separate the license plate from the image for subsequent processing module processing. License plate positioning is one of the important factors that affects system performance. At present, there are many ways to locate license plates, but in general, they can be divided into two methods:   First, the method based on graphic imaging.   There are mainly (1) color-based localization methods, such as color edge algorithm, color distance and similarity algorithm, etc .; (2) texture-based localization methods, such as wavelet texture, horizontal gradient differential texture, etc .; (3) edge detection-based Positioning method; (4) Positioning method based on mathematical form.   The positioning method based on graphics and image technology is susceptible to interference caused by external interference information and causes positioning failure. For example, in the color analysis-based positioning method, if the background color of the license plate is similar to the color of the license plate, it is difficult to extract the license plate from the background. In the method based on edge detection, the stain on the edge of the license plate can easily cause the positioning failure. The interference of external interference information will also deceive the positioning algorithm, causing the positioning algorithm to generate too many non-license plate candidate regions, which increases the system load.   Second, the method based on machine learning.   Machine learning-based methods include feature engineering-based positioning methods and neural network-based positioning methods. For example, we can train a license plate positioning system through a cascaded classifier based on haar features provided by OpenCV. But this method is very time-consuming to train, and the efficiency of classification and positioning is also low. Therefore, in the area of target localization, neural network-based methods are the mainstream methods. In neural network-based localization methods, convolutional neural networks are mainly used to learn target features. Because the convolutional neural network has translation invariance, it can be supplemented with candidate regions in the learning process and classify the candidate regions. The candidate region that is correctly classified is the location of the target. There are many implementation models for such methods, such as RCNN, faster RCNN, SSD, and so on.   Character segmentation   The task of character segmentation is to cut each character in a multi-column or multi-line character image from the entire image into a single character image. Traditional character segmentation algorithms can be summarized into the following two categories: direct segmentation methods, segmentation methods based on image morphology. The direct segmentation method is simple, based on some prior knowledge, such as the distribution of license plate characters, and also assists some basic projection algorithms to achieve segmentation; the morphology-based segmentation method uses edge detection, expansion and corrosion to determine the character image position. Traditional character segmentation algorithms are also sensitive to external disturbances, such as license plate inclination, character fouling, and adhesion. The correct segmentation of the license plate characters is very important for character recognition. Only when the segmentation is correct can the recognition accuracy be guaranteed. With the continuous development of neural network theory, end-to-end picture classification and recognition technology have also made great breakthroughs, so many OCR software gradually get rid of the traditional character segmentation processing, and multi-characters are directly recognized by the recognition network.   Character recognition   Character recognition is the process of extracting character encoding from a picture containing one or more characters. The typical method of character recognition is the method of picture classification based on machine learning. In the picture classification method, one picture can only output one classification, that is, one picture can only contain one character image. This requires a high accuracy of character segmentation. Another recognition method is the end-to-end character recognition method based on a recurrent neural network. This method inputs the entire license plate image into the network, and the neural network will directly output all characters. The end-to-end method directly removes the character segmentation process and avoids the loss of stability caused by the character segmentation error, but the end-to-end method is also sensitive to other disturbances such as license plate tilt.   we briefly discussed some technologies of the three core part of the license plate recognition system above. In the follow-up, we will make a detailed discussion of some mainstream technologies.
Three solutions for license plate recognition machine failure
Three solutions for license plate recognition machine failure
Three solutions for license plate recognition machine failure by:Shenzhen TGW Technology Co.,Ltd   Humans are smarter than machines. Machines only run according to programs, but humans choose different coping methods according to the actual situation. This is the difference between humans and machines. It is also the reason why humans can create machines. Unchanged things are most easily created. One thing to note is that the license plate recognition device is a machine. The machine may malfunction. What kind of machine failure have you encountered? The faults of the license plate recognition equipment generally have only a few common faults, and ordinary car owners do not know what to do when they encounter such faults. Let ’s take a look at how to deal with this fault.   First, the ground sense coil is not responding         When the owner drove in front of the smart barrier gate, the barrier did not open automatically. At this time, the ground sense coil may be malfunctioning. Without sensing the arrival of your car, the license plate recognition management system will not be able to identify the chargeback. At this time, the owner should try to retreat the vehicle until it exits the sensing range, and then wait a few minutes before trying again. Generally, if the ground sensing coil is defective, the barrier will be reopened.   Second, the vehicle number plate problem         If you still encounter a situation where the smart barrier does not open automatically, try to step back and wait a few minutes and try again. If the smart barrier does not open, you need to get out of the vehicle and check if your vehicle number plate is affected. It ’s damaged, so serious that the license plate recognition system ca n’t recognize it. You can get off the car and deal with the vehicle number plate. Finally,Insufficient balance         After the first test fails, and it is determined that the number plate of the vehicle is not damaged, but the intelligent barrier for plate identification cannot be opened. This may be because the balance of the account balance is insufficient, which causes the license plate recognition management system to be unable to perform chargeback, and the program cannot be run. The system will not open the smart barrier for you to pass.            We do not need to panic when encountering many aspects of machine failure. After all, machines are made by humans. There is nothing we can't solve!
How to improve the recognition accuracy of license plate recognition system
How to improve the recognition accuracy of license plate recognition system
by:Shenzhen TGW Technology Co.,Ltd How to improve the recognition accuracy of license plate recognition system From the current market, license plate recognition manufacturers see that, as the license plate recognition system can enable vehicles to enter and exit the parking lot, they can complete the  charges without the card, which speeds up vehicle traffic and reduce card management Work, while reducing the cost of management staff, so it is widely used in major parking lots. However, the license plate recognition system sometimes recogniize license plates in a wrong way. How to solve this problem and improve the recognition accuracy ?   From the perspective of external factors, the factors affecting the license plate recognition accuracy mainly include viewpoint transformation, light, occlusion, proportion, deformation, and complex background.   The license plate recognition system used in the parking lot is mainly composed of barriers, vehicle detectors, high-definition license plate capture cameras, electronic displays, and control centers. Capture the license plate of the import and export vehicle through a high-definition license plate capture camera, extract the comparison of the pictures before and after, and determine whether to release the vehicle. It can be seen that the license plate recognition parking lot system has high requirements for the entire system, and at the same time, the external environment will have a great impact on the recognition rate. Three main reasons affect the recognition rate of parking lots with a license plate recognition parking system. First, it is necessary to ensure that the ambient light in the parking lot is bright enough. For dark or nighttime, some supplementary lighting equipment should be appropriately added; Second, ensure that the license plates of vehicles entering and leaving the parking lot are intact so that the license plates of each vehicle entering and leaving the stadium can be captured; Third, ensure the license plate recognition position, the size of the license plate pixels, not less than the size of the best license plate pixels; Therefore, optimizing the recognition environment, reducing the complexity of the environment, and slowing down the vehicle speed through auxiliary means can effectively improve the license plate recognition rate.   From the internal cause, the license plate recognition system is based on the license plate recognition algorithm, and the license plate recognition algorithm is composed of space complexity and time complexity and is divided into five different characteristics:   1, the entry is the specific license plate image;   2, the output item is the recognition result of the license plate;   3. Finiteness means that the evolution of the algorithm is limited, and infinite calculation is impossible;   4. Exactness means that each calculation step of the algorithm has a precise definition;   5. Feasibility is the effect of license plate recognition.   By optimizing the above five characteristics, fundamentally optimizing the license plate recognition algorithm is one of the most effective methods to improve the license plate recognition rate.
Alpr software
Alpr software
Alpr software by:Shenzhen TGW Technology Co.,Ltd With the rapid development of society and the economy, cars are playing an important role in people's work, production and life. The overall number of cars is increasing rapidly, transportation has become more and more difficult to be managed, traffic problems have also emerged. what is more, these problems are becoming More and more complicated. With the emergence of Alpr software, roads, vehicles, and users were closely unified. Alpr software played an all-round role in society and was a real-time, accurate, and efficient car management system. The most important thing about Alpr software is the license plate recognition algorithm.   The identification algorithm is a technology with the highest gold content in the entire system, and its research and development costs also occupy the bulk of the entire product research and development costs. The research and development team spends the most effort and time on the algorithm. Alpr Software function 1: grayscale image With the development of science and technology, a variety of color photos and color technologies have become widespread, but these color images contain a lot of irrelevant information. For the recognition algorithm, the color image will cause a lot of interference, so the algorithm needs to gray it. Alpr Software function 2: Image preprocessing (1) Edge detection Image edges are the basis for image segmentation, target area recognition, and area shape extraction. They also play a very important role in extracting license plate locations, so edge detection is very necessary. (2) Image corrosion Image erosion can erode the edge image. After the erosion, an image of the target area can be obtained, which greatly reduces the target range and improves the accuracy of the license plate recognition algorithm. (3) Fill the image Filling an image is a closed operation on the image, used to smooth the outline of the image, and used to fill tiny holes, cracks, broken targets, etc. in the target. (4) Morphological filtering Finally, morphological filtering is used to remove a large number of irrelevant small objects, and the rest are the targets that need to be identified. Alpr software function 3: License plate positioning After the pre-processed images, the rest are rectangular pictures of different sizes. You only need to find the rectangular figure of the license plate in these graphics to implement the next step. By some calculations, the position of the license plate can be found out, and the content of the rectangle can be extracted. Alpr software function 4: Character segmentation Calculate the sum of each column by column from left to right through the binary image, distinguish it by using 1 and 0, and finally split each character out. Alpr software function 5: Character recognition After the characters are segmented, how does the algorithm need to recognize each character? First, establish a recognition sample database, read the segmented and normalized characters, match the cut characters with the template library, and finally get all the data of the segmented characters. Alpr software works like this. For more info,please click here to wikipedia.
License plate recognition company
License plate recognition company
license plate recognition company Shenzhen TGW Technology Co., Ltd is the leading license plate recognition company for vehicle intelligent parking system and license plate recognition system         Every company will have different departments. Generally, a self-operated company has a promotion department, and this department will have its own operating team. The main responsibility of this promotion department is to promote your company's various products, attract consumers or companies that have the opportunity to cooperate, and assist the business department to achieve a single business. Therefore, for start-ups, this promotion department is more important. The company that has just started is in the absence of various resources without reputation, customers, and channels, so promotion becomes even more important. What does an experienced company operations team do?   Then I will give an example, such as Foshan license plate recognition company, their operation team mainly has three major strategies.   license plate recognition company operating strategy 1: network promotion         People with experience know that the Internet is the easiest place to publicize in society at the same time. At the same time, this is also the place where the competition is the most fierce. Each search platform is a must for all manufacturers. The network platform is particularly important, as long as it takes the first place, it can "dominate the world." Therefore, a newly opened license plate recognition company must have a place on the network platform.   license plate recognition company operating strategy 2: Online activities for offline registration         It can be said that it is available to people from all over the world on the online platform. For Foshan license plate recognition company, the most unfortunate thing is not that the user wants to buy but cannot complete the transaction because of various geographical reasons; Users, but customers do not know that there is a local license plate recognition company and go online to buy other license plate recognition company products, which is the most pity for a company. Therefore, the experienced operation team often organizes some small activities for online registration and offline participation to let local residents know the “existence” of the company and reduce the loss of orders.   license plate recognition company operating strategy 3: coordinate and handle the relationship between old users         Most of the performance of many companies is contributed to by old customers. Someone once investigated a company's performance report for one month and found that more than 70% of the performance was contributed by old customers and only 20% to 30% of new customers. This survey The report made major companies think deeply, so experienced operating teams will handle the relationship with old customers. The above are the three major strategies of the Foshan license plate recognition company operation team. I hope it will help some companies that are just starting out.    How many college students come out for internships or work every year? There should be millions of them! There are as many junior and senior year internships as there are freshmen entering each year. These are balanced. But in today's society, how can it accommodate so many people for internship work, even if it can accommodate so many college students, will they be proud and accept all kinds of hard and unpleasant jobs? This is simply impossible for them. College students can try to start their own businesses and run a license plate recognition company .
How to improve the recognition rate of license plate recognition system
How to improve the recognition rate of license plate recognition system
license plate recognition camera system by:Shenzhen TGW Technology Co.,Ltd license plate recognition camera system has been widely used in our life, because it has the advantages of fast speed, and has made a significant contribution to the development of our intelligent traffic. When mention about car parking recognition systems, you might immediately think of recognition rates of license plate recognition camera system. What improvements will make in the recognition rates of license plate recognition camera system in the future? Perhaps it is a problem for many parking system manufacturers that how to improve the recognition rate of license plate recognition camera.nowadays,parking management systems are technically based on so-called "cloud" architectures, as opposed to the LAN architectures used by independent parking Spaces. After applying the "cloud" architecture, the license plate number needs to be uploaded to the cloud server, which is the premise of binding license plate number payment based on mobile Internet. If the license plate number is recognized wrong, and the wrong license plate number is uploaded to the cloud server, it is conceivable that the subsequent payment based on the license plate number will definitely be chaotic. The reason why it confuse us is that license plate recognition camera system is based on the recognition rate, even if the recognition rate reaches 99%, there is still 1% error rate, how to achieve the license plate recognition absolutely correct? To put it simply,increase the recognition of vehicle's rear license plate as well as the front one. Currently, the license plate recognition camera system only captures the front license plate. The recognition result of front license plate is not enough to ensure a correct recognition, and the increased license plate recognition has double recognition effect. Arrival, the vehicle license plate recognition system for parking lot according to the original license plate recognition method is used to identify the license number of vehicle QianChePai, vehicles enter the parking lot, by increasing the camera after the vehicle's license plate identification, recognition results consistent can think correctly, the results can be inconsistent thought recognition error, then need to approved by the human, thus increasing the accuracy of license plate recognition. The car park system can achieve a double recognition effect by adding license plate recognition, which ensures the correct rate of license plate recognition. This is also the only way to solve the problem of correct rate of license plate recognition.
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Shenzhen TGW Technology Co.,Ltd is the leading access control solution provider for vehicle intelligent parking system, license plate recognition recognition system and pedestrian access control turnstile and face recognition terminals.
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