License Plate Recognition System

"License plate recognition" advantages of a fixed vehicle management, solve when "Card Management", a Caddo car situation; 2, completely solve the situation when "Card Management", the card does not carry; 3, completely solve the "card Management ", the card is lost brings changing the card, make the card work; 4, completely solve the" Card Management ", the card is damaged caused by changing the card, make the card work; 5, completely solve the" time card management, " card installed placement of communication work. "License Plate Recognition" advantage in a temporary vehicle management, solve the "Card Management", the opportunity to charge personnel unobservant money; 2 will be completely freed from artificial issuers charge personnel work out, only responsible for money - Even with the entry card issuing machine, often they need someone to help between "entry card issuing machine" and "temporary vehicle" passing "temporary card", often deviated from the "original purpose of saving human resources." Because the temporary car parking often quite far from the issuing machine, which is issuing machines and people are afraid to hit the subconscious Barrier normal reaction; 3, solve the "card management," the mixed up some temporary car parking lot, while the loss of the temporary card and the parking fee; 4, completely solve individual fixed cars in admission when malicious removal of temporary cards, resulting in continual loss of temporary cards; 5, completely solve the limited capacity of the entry card issuing machine problems; 6, automatic carts, car models were distinguished perform different charges; poor market practical application of license plate recognition Case Causes market now some of the "license plate recognition" the practical effects of poor circumstances, some reason parking system manufacturers do not self-developed "plates recognition" capability, outsourcing only "license plate recognition" software, but on the outsourcing of "license plate recognition" software recognition result of unexplained so poor, powerless to improve the recognition rate. These manufacturers had to "license plate recognition" function as a secondary function, in essence, still rely on the card management. They came up with is to use "license plate recognition" as a gimmick in the name of false intelligence. However, for the consumer, after all, this gimmick paid higher fees, which is not fair. And I began to research and development from 2009 on how to "license plate recognition" technology into the practical stage, with the project their own problems and peer feedback, we found on the market today "license plate recognition" generally ineffective the root cause is: 1, can not guaranteed to get the right picture, such as the angle is inappropriate, improper license plate light, license plate image is not clear; 2, can not make a license plate recognition software to accommodate multiple junctions environment, such as an item high on the East Gate of picture identification rate, But Simon's picture identification rate is very low; when the plate along a high recognition rate of light, backlight is low; 3, picture taking rely on cameras, license plate recognition relies on license plate recognition software on the computer, control Barrier bickering rely on "Dashboard" , too much equipment involved in a job once off the net completely unable to work; 4, must rely on license plate recognition software on the computer, the camera is capturing networking and routing more difficult, can not meet some of you can not configure the computer environment and projects. Stereoscopic HD License Plate Recognition Parking Management System outlined our three-dimensional high-definition license plate recognition does not stop traffic parking management system embodies the plates focus light, three-dimensional license plate recognition, license plate number of original distortion calibration technology to effectively solve the environmental adaptability problems. Product set network video, capture vehicle license plate recognition, voice playback, intelligent control in one, accompanied by Barrier and Chinese display, it can form a complete parking management system, users can manage fixed vehicle can also be achieved temporary vehicle Toll. Fixed vehicle can not stop traffic, temporary parking of vehicles may not enter. The system is simple, reliable, install, maintain, easy to use an HD capture license plate recognition rate increase is mainly through a high-resolution, high-resolution high-quality pictures. Increased from 704 * 288 resolution SD case to one million, two million, three million pixel high-definition case available; field of view not only to see the license plate, better cover to be able to see models of a larger region, lane It can control a wider, more acceptable vehicle entry angle; clarity by high-resolution control characters, greatly enhance the character recognition rate. 2, license plate area to focus exposure metering, focus on areas linked plate automatic exposure algorithm to get the best exposure. License plate according to the brightness value analysis to automatically adjust exposure parameters, such as the parameters of the shutter speed, gain, etc., can be adjusted frame by frame, quick response to ensure optimal exposure license plate effect, thereby increasing the rate of license plate recognition. Use stream and capture two exposure parameters, automatically switching regulator, it is consistent with the actual stream effect visual effects, but also for debugging. It has been successfully resolved during the day large backlit less exposed problem, big welcome light overexposure problem; night overexposed, underexposed issues. 3, three-dimensional three-dimensional license plate recognition using principal mode of recognition from multiple cameras simultaneously from the camera to capture the main identification, the main camera to Smart arbitration algorithm to select the optimal recognition results control. License plate recognition technology to simultaneously solve for roads, angle and other aspects of the demanding requirements of improving the recognition rate. Lane increases, reducing the length of the driveway without straighten distance requirements, improve the adaptability of the product. Vehicle various angles, entered, can capture a clear identifiable image. 4, plate distortion field calibration by environmental constraints, plate surface and the camera can not do the vertical axis, resulting in distortion plate, away from the position of characters for the camera smaller, to identify cause some difficulties. Distortion calibration algorithm uses multi-color space detection plate background, accurate positioning plate area, get the license plate tilt angle and lateral deformation ratio, the maximum tilt angle reaches 25 °, safe and accurate calibration rate 15 ° angle reaches more than 99%. 5. recognition algorithm - neural network + feature recognition algorithm using the energy filter texture with feedback detection, so that the license plate from the positioning success rate of over 99%. Detecting multi-color space to ensure the accurate identification of multiple plate types, including: blue card, yellow card, military vehicles, police cars, WJ vehicle, personalized license plates, license plate and consulates, and other provinces and Hong Kong license plates. License plate character count feature recognition method to ensure the> character recognition rate of 98% (field test), and does not require on-site training; assisted the BP neural network algorithm is doing a good supplement, while ensuring a good character recognition rate. 6, license plate flash technology The technology perspective to solve defaced, aging, non-reflective coated plate, reflective difference; addressing environmental light, dark, rain and snow weather insufficient lighting problems. License plate recognition, offset plates, aging plate, coated plate due to destruction of other substances reflective material plate surface can cause the license plate is difficult to take a clear reflection of the license plate can not be identified. In the underground garage entrance, some large backlit scenes drive to sudden changes in the dark when the light, license plate in shadow, clear license plate shot in the rain and snow, ambient light dark scenes, off-line due to lack of license plate obscured difficult snow to take a clear license plate. Our perspective flash technology to solve this problem is due to the reflective plate is able to use reflective paint license plate surface can produce retroreflective, can 85% of the light is reflected back toward the source, and offset plates, license plate aging, Apply the plate, either through the use of retroreflective cause explosion, or less explosive, or picture mold burnt. 6 different multiple connectivity options, the fully networked with traditional cameras audio cable, video cable, etc., embedded three-dimensional license plate recognition system using TCP / IP network mode, a power cord and a few lines to complete the overall system connectivity, making the system wiring, construction, maintenance easier and convenient. The system can use the existing network connection, do not repeat the wiring, saving the cost of construction. Because TCP \ IP network users are very common, so the method of operation is also more likely to be accepted management. 7, environmental adaptability, high stability 1) can be adapted to high and low temperature environments. At low temperatures, a cold start can be preheated by the heating part of the circuit; at high temperatures, the need for high-speed processor, heat a large, in order to ensure reliable, license plate recognition cameras allow heat large chip devices for effective direct contact with the shell heat; the body itself uses heat sink material, effective heat dissipation; the other. Special to configure a hood, which can effectively reduce the radiation temperature. 2) sealed dust technology. Because of the dust of the optical element of demanding, many companies are using the traditional way of housing seals, but poor in this way seal. Our company is a multi-stage dust technology, key sensitive part of the body itself and sealed. In front of the camera with protective lenses, protective lenses and camera lens so that the formation of a separate sealed chamber between, effectively prevent dust from entering. In addition, the lens itself dust-proof glass, nano-materials, dustproof and waterproof good effect. 3) multi-stage cold cavity anti-fog technology. By increasing the number of seal cavity, isolate the air environment between the external and internal cameras, reduce the speed of the camera lens and external environment of heat exchange while maintaining constant humidity inside sealed from the control temperature, humidity mist formed two important aspect, to prevent internal lens fogging purposes. 4) hood. Hood can mitigate the impact outside of the lens, such as unexpected light, dust, rain, snow, water droplets, can achieve the second major protection of the lens. 5) type test hardware products: three-dimensional high-definition ANPR camera by repeated temperature test, ESD performance test, waterproof test, impact test, vibration test, greatly enhancing the adaptability of the camera in a variety of environments. Embedded network, backup critical data, the product provides a stable and secure. License Plate Recognition Parking Management System software, three-dimensional high-definition three-dimensional license plate recognition management system uses HD ANPR camera as a core component, it can automatically identify license plate information, and automatically determine the competence to decide whether to release from the pole. Characterized by setting simple, concise interface, to adapt to various customer's individual management needs to support flexible set up a temporary car charging scheme. A, booth program manager to display vehicle access to information, is left to the user the most intuitive interactive platform. The user can see through the admission booth each user's history information, access to information query, access the image, the device status display. B, the license plate can download all entrances and exits to the three-dimensional high-definition download ANPR camera can also be a separate entrance to a high-definition three-dimensional license plate recognition camera download. Users can import EXCEL owners of basic information into the software. After the work is completed, the user then "Download the license plate" operations, can be used after a successful download. C, the device settings for the relevant device has been connected to the LAN automatically displayed in each list box, locate the installation in the relevant entry or exit of the device ID number and select it, then click the "Save Settings" button. D, the report query report query is normal access vehicle records, double-click on the record or selected records, you can check out the current record out of the picture.