CN103186982A - Intelligent access system for public security - Google Patents
Intelligent access system for public security Download PDFInfo
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- CN103186982A CN103186982A CN201110446404XA CN201110446404A CN103186982A CN 103186982 A CN103186982 A CN 103186982A CN 201110446404X A CN201110446404X A CN 201110446404XA CN 201110446404 A CN201110446404 A CN 201110446404A CN 103186982 A CN103186982 A CN 103186982A
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Abstract
The invention discloses an intelligent access system for public security, which comprises a camera shooting and auxiliary lighting unit, a vehicle detection unit, an image collecting and processing unit, a transmission unit and a central management unit, wherein the camera shooting and auxiliary lighting unit outputs a video signal; the vehicle detection unit outputs a vehicle detection signal; the outputted vehicle detection signal and the outputted video signal are inputted to a signal input end of the image collecting and processing unit; a signal output end of the image collecting and processing unit outputs license plate information; the outputted license plate information is inputted to a signal input end of the central management unit; and the central management unit stores the license plate information in a database. The intelligent access system can achieve vehicle detection, vehicle license plate automatic identification, monitored vehicle searching, vehicle speed determination, overspeed alarm, traffic flow statistics, data transmission, remote maintenance, data retrieval, fault tolerance and anti-theft alarm functions.
Description
Technical field
The invention belongs to intelligent transportation and electronic police field, particularly a kind of public security smart card port system.
Background technology
Current, all kinds of criminal offenses when in the case relevant with motor vehicles quite a lot, as escaping behavior after traffic accident, robbery of motor vehicle etc.If set up an automatic control point to realize the situation of vehicular traffic is carried out 24 hours uninterrupted, round-the-clock automatic records at the strategic road in turnover urban district and the emphasis highway section of highway, road vehicle intelligent monitoring and recording system (being commonly called as " intelligent bayonet socket ") namely is installed, then can be various places public security department clear up a criminal case important clue and foundation are provided, and can improve various places public security deparment and traffic police department effectively to the management level of motor vehicles.In addition, this system also possesses and tests the speed and the function of vehicle flowrate monitoring, can realize monitoring and record to the illegal vehicle of driving over the speed limit, and " blacklist " raided also is a major function of this system.
Technology such as public security smart card port system utilization advanced person's Computer Image Processing, fuzzy diagnosis, remote data access develop.System levies image (car plate type and number) and vehicle overall picture (color to the anterior thing of each motor vehicles by monitored highway section, vehicle length etc.) carry out continuous all-weather real-time record, system to candid photograph to vehicle image carry out automatically identification and vehicle dynamically deployed to ensure effective monitoring and control of illegal activities of car plate, to hypervelocity, the vehicle that retrograde grade is illegally travelled is captured, and with the time of vehicle by the bayonet socket control point, information such as the speed of a motor vehicle and type of vehicle generates data file in the lump and preserves, also can the information of each control point be sent to the administrative center of far-end by broadband network, realize organic sharing.Current Gate System is function singleness often, lack diversification, do not satisfy actual demand, the identification of car plate is often based on the recognition methods of single image, keep away unavoidable accidental error like this, the discrimination of system is often not high, and the conversion of environment often brings bigger influence to system in addition, the conversion that system can't conform fast.
Summary of the invention
The object of the present invention is to provide a kind of smart card port system, this system can realize vehicle detection, number plate of vehicle automatically identification collect with the vehicle of deploying to ensure effective monitoring and control of illegal activities and look into speed of a motor vehicle mensuration and overspeed alarming, vehicle flowrate, data transmission and remote maintenance, data retrieval, failure tolerant and anti-theft alarm function.
The technical solution that realizes the object of the invention is: a kind of public security smart card port system comprises:
Shooting and floor light unit: comprise high-definition camera and light filling lamp, be used for round-the-clock vehicle and the license board information of catching, every track disposes a feature video camera at least, panoramic camera of each travel direction configuration;
Vehicle detection unit: comprise and detect main frame and ground induction coil, be used for finishing the mensuration of vehicle detection, the speed of a motor vehicle and numeration and the statistics of vehicle flowrate; When vehicle passed through ground induction coil, ground induction coil produced induced signal and also sends it to the detection main frame, detected main frame and measured the speed of a motor vehicle and statistical vehicle flowrate according to these induced signals;
Image acquisition and processing unit: comprise industrial computer, video frequency collection card and control module, video frequency collection card, control module is installed in the industrial computer, video frequency collection card receives by video camera and passes the video flowing of coming, control module comprises image acquisition and processing submodule and the automatic recognin module of car plate, convert the analog video image signals of video camera to digital picture by video frequency collection card, when detecting main frame and detected vehicle and pass through, the image acquisition submodule this moment of intercepting one width of cloth feature in the video flowing of feature video camera, intercept a Zhang Quanjing picture simultaneously in the video flowing of panoramic camera, feature is finished license board information identification through car plate recognin module;
Transmission unit: comprise remote network communication module, transmission equipment fiber optic and transmission line optical fiber; Be used for make a video recording and the vision signal of floor light unit collection and the car test signal of vehicle detection unit detection are transferred to industrial computer;
Central manage-ment unit: comprise database server, the network switch and inquiry workstation, inquiry workstation and database server direct interconnection network switch, central manage-ment unit adopts C/S and B/S structure, is used for finishing Query Information, deploys to ensure effective monitoring and control of illegal activities, warning function; The license board information that database server reception and memory image collection and processing unit identify, feature and the panoramic pictures of the intercepting of image acquisition submodule are stored in the database server;
Shooting and floor light unit outputting video signal, vehicle detection unit output car test signal, the signal input part that the car test signal of output and vision signal are input to image acquisition and processing unit, the signal output part output license board information of image acquisition and processing unit, the license board information of output is input to the signal input part of central manage-ment unit, and central manage-ment unit is deposited into license board information in the database.
The present invention compared with prior art, its remarkable advantage: the present invention adopts the car plate recognizer based on intelligent decision and on-line study, not only improve correctness and the robustness of discrimination and the recognition result of system, and improved the quick ability that adapts to new applied environment of system.The present invention adopts the remote transmission technology, and industrial computer is adopted house dog and integrated mainboard, has not only improved the reliability and maintainability of system.The present invention has not only improved the accuracy that detects, and can detect the speed of a motor vehicle and reverse driving by bury the mode of two ground induction coils underground in each track.The present invention is provided with central manage-ment unit, and the internal user in the public security net can Query Information, information and warning are deployed to ensure effective monitoring and control of illegal activities in issue in real time.The present invention with multiple function set has satisfied multiple demands.
Description of drawings
Fig. 1 is public security smart card port system topological structure figure.
Fig. 2 smart card port system front-end topology structural drawing
Fig. 3 native system front end workflow diagram.
Fig. 4 native system central manage-ment unit frame diagram.
Fig. 5 Gate System front end scheme of installation (two-way traffic in the same way).
Fig. 6 is that system of the present invention connects block diagram.
Embodiment
A kind of public security smart card port system comprises:
Shooting and floor light unit: comprise high-definition camera and light filling lamp, be used for round-the-clock vehicle and the license board information of catching, every the track disposes a feature video camera at least, vehicle, color, profile, loading condition and the road conditions of while in order to see vehicle clearly, panoramic camera of each travel direction configuration, and adopt CDM floodlight light filling, reduce driver's sense of discomfort;
Vehicle detection unit: comprise and detect main frame and ground induction coil, be used for finishing the mensuration of vehicle detection, the speed of a motor vehicle and numeration and the statistics of vehicle flowrate; Adopt the vehicle detection mode of coil checker, two ground induction coils are buried in each track underground, for detection of vehicle and the speed of a motor vehicle, and can send alerting signal to over-speed vehicles and reverse enforcement vehicle; Detect main frame and adopt toggle switch that detection sensitivity is set, parameter is never lost in system's power down, the reliability height.When vehicle passed through ground induction coil, ground induction coil produced induced signal and also sends it to the detection main frame, detected main frame and measured the speed of a motor vehicle and statistical vehicle flowrate according to these induced signals; Two ground induction coils are buried in each track, described vehicle detection unit underground, for detection of vehicle and the speed of a motor vehicle, and can send alerting signal to over-speed vehicles and reverse enforcement vehicle; Detecting main frame adopts toggle switch that detection sensitivity is set.:
Image acquisition and processing unit: adopt industrial computer, video frequency collection card and corresponding control module to finish collection and the processing of image, comprise car plate location, car plate cutting, car plate identification, license plate recognition result decision-making.Wherein, the car plate location is adopted based on the algorithm of locating license plate of vehicle of the various features fusion of characteristic remarkable and is finished the car plate location, be applicable to various complicated background environment and different camera angle, the license plate recognition result decision-making module utilizes the historical record (comprising recognition result, recognition credibility, track record, similarity record etc.) that stays in the process of a car plate through the visual field, and recognition result is carried out intelligentized decision-making; Video frequency collection card, control module is installed in the industrial computer, video frequency collection card receives by video camera and passes the video flowing of coming, control module comprises image acquisition and processing submodule and the automatic recognin module of car plate, convert the analog video image signals of video camera to digital picture by video frequency collection card, when detecting main frame and detected vehicle and pass through, the image acquisition submodule this moment of intercepting one width of cloth feature in the video flowing of feature video camera, intercept a Zhang Quanjing picture simultaneously in the video flowing of panoramic camera, feature is finished license board information identification through car plate recognin module;
Transmission unit: comprise remote network communication module, transmission equipment fiber optic and transmission line optical fiber; Be used for make a video recording and the vision signal of floor light unit collection and the car test signal of vehicle detection unit detection are transferred to industrial computer;
Central manage-ment unit: comprise database server, the network switch and inquiry workstation, inquiry workstation and database server direct interconnection network switch, central manage-ment unit adopts C/S and B/S structure, is used for finishing Query Information, deploys to ensure effective monitoring and control of illegal activities, warning function; The license board information that database server reception and memory image collection and processing unit identify, feature and the panoramic pictures of the intercepting of image acquisition submodule are stored in the database server; Each user terminal has corresponding authority respectively, is the internal user in the public security net, carries out differentiated control.
Shooting and floor light unit outputting video signal, vehicle detection unit output car test signal, the signal input part that the car test signal of output and vision signal are input to image acquisition and processing unit, the signal output part output license board information of image acquisition and processing unit, the license board information of output is input to the signal input part of central manage-ment unit, central manage-ment unit is deposited into license board information in the database, and functions such as inquiry externally are provided, and mainly finishes inquiry, deploys to ensure effective monitoring and control of illegal activities, warning function.
Public security smart card port system of the present invention, the license board information recognition methods that the collection of described image and processing unit adopt, concrete steps are as follows:
The first step is analyzed video flowing, the vehicle in the image is followed the tracks of the intercepting feature;
In second step, employing is finished the car plate location based on the algorithm of locating license plate of vehicle of the various features fusion of characteristic remarkable;
The 3rd step, adopt the cutting of finishing number-plate number character based on the character cutting algorithm of connected domain, concrete steps are as follows:
3.1 number-plate number character height is estimated;
1) car plate is converted into white gravoply, with black engraved characters;
2) the car plate vertical edge detects, and at first uses the Sobel operator to finish rim detection to car plate, uses the OTSU method to obtain the vertical mapping of car plate then, and edge pixel replaces with black, and other pixels replace with white, find the vertical edge of car plate;
3) horizontal projection finds coboundary and the lower boundary of number-plate number character;
3.2 number-plate number character duration is estimated;
1) use the OTSU algorithm to find out threshold value, finish the license plate image binaryzation;
2) vertical projection greater than 6 pixels and less than the piece of the wideest piece, uses the mean value of these pieces as the estimated value of character duration for width;
3.3 extract the differentiation character block by connected domain, comprise connected domain detection and connected domain and check two parts;
1) connected domain detection algorithm;
At first, a label counting is created and is initialized as 1, and then, binary picture is by from left to right, scanning from top to bottom;
1. for each pixel, check whether northeast, north, northwest and the western pixel of 8 – connected domains is foreground pixels;
2. if the neighbours that do not meet then compose the value of region-counter to this zone, this region-counter adds 1;
3. if having only neighbours that meet, pixel is distributed to this zone, if a plurality of neighbours meet and all be the same area, pixel value is distributed to this zone;
4. if a plurality of neighbours coupling and in zones of different is assigned in these zones any one to pixel, records all these zones and be equivalent region;
5. scan image, and give identical regional value with the zone of all equivalences;
6. scanning stops, the pixel that does not indicate in image;
2) connected domain inspection, rule criterion is as follows:
The rule 1: if the coboundary of a connected domain less than overall coboundary, if or its coboundary greater than overall lower boundary, then this connected domain is not contain character;
Rule 2: if the depth-width ratio of a connected domain greater than 0.8 or less than 0.3, then this connected domain is assumed that and does not contain character;
Rule 3: if the area of this connected domain greater than the sixth of the size of general image, then needs further to cut apart;
Rule 4: if the detected connected domain quantity of success surpasses 7 or be lower than 3, then need to reexamine;
The connected domain that does not satisfy above-mentioned standard is regarded as not containing character, and is therefore deleted; After all connected domains of given car plate were examined, this process was finished;
In the 4th step, adopt ORC to finish the identification of the number-plate number;
The 5th step, every frame video image is carried out above-mentioned Real time identification, recognition result is made a strategic decision, namely obtain the comprehensive confidence level evaluation of this car plate by calculating observation frame number, recognition result stability, trajectory stability, speed stability, average confidence level and measuring similarity value, thereby determine it is to continue to follow the tracks of this car plate, still export recognition result, or refuse this result.
Public security smart card port system of the present invention, described industrial computer built in hardware house dog, and adopt integrated mainboard.(system in case of system halt can be restarted automatically, and industrial computer adopts present arithmetic speed height, integrated mainboard in addition, makes system handles speed fast, and reduces the harmful effect that many integrated circuit board plugs cause).
Below in conjunction with accompanying drawing the present invention is described in further detail.
By Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, public security smart card port system comprises: vehicle detection unit, front end shooting and floor light unit, image acquisition and processing unit, transmission unit and central manage-ment unit.Video camera is in real-time photography state (per second 25 frames) always in the native system front end system, image remote is transferred in the interior video frequency collection card of industrial computer, convert the analog video image signals of video camera to digital picture by video frequency collection card, when detecting main frame and detected vehicle and pass through, the image acquisition submodule intercepts picture (car plate feature) at this moment in the video flowing of feature video camera, simultaneously in the video flowing of panoramic camera, intercept panoramic pictures, feature is finished number-plate number identification through the car plate identification module, the control module registration of vehicle is by the time of control point, the place, Vehicle Speed, travel direction, length of wagon and vehicle image etc., when the speed of a motor vehicle that records surpasses the speed limit of default, onsite alarming immediately, notify the operator on duty to be noted, the above number-plate number, vehicle image, images such as the value of testing the speed, data message is treated can be uploaded to central manage-ment unit by transmission network, and deposits database server in; The central manage-ment unit background system can be accepted the warning message of front end, and transmit workstation on duty, issue blacklist etc., background system is handled image, the data message uploaded, can inquire about (inquiry of deploying to ensure effective monitoring and control of illegal activities, illegal inquiry, passing inquiry), statistics (vehicle flowrate, illegal statistics, car statistics) etc., when need were deployed to ensure effective monitoring and control of illegal activities vehicle, the information but typing is deployed to ensure effective monitoring and control of illegal activities reached system front end simultaneously.
Front end shooting and floor light unit: formed by panoramic camera, feature video camera and light filling lamp.As shown in Figure 5, in the installation of double-lane road upper latch notch system front end in the same way, need two feature video cameras (one in per car road) and a panoramic camera, be installed on same " L " bar, the light filling lamp is installed on another " L " bar.
The vehicle detection unit: whether ground induction coil detects has vehicle to pass through, signal is sent to the detection main frame, detect main unit vehicle by the time of front and back coil, judge whether reverse driving of vehicle, and utilize anteroposterior diameter to cross the time of front and back coil and the distance between coil, calculate the speed of a motor vehicle; Detect the host computer using vehicle by the time of single coil, multiply by current vehicle speed and obtain vehicle commander's information, the result is sent to image acquisition and processing unit.Native system adopts model: the JL810ZJ wagon detector, and built-in 6 road ground sense testing circuits can connect 6 ground induction coils, and the ground induction coil sense cycle is less than 1ms, coil sensitivity: 8 grades.
Image acquisition and processing unit: image acquisition and processing are finished by 1 industrial computer.Being configured to of industrial control computer: CPU P4 is more than 2.8, internal memory 〉=512M, 1 of built-in video frequency collection card.Native system stores 1 of characteristic image and 1 calculating of panoramic picture at least by every vehicle, 2 pictures account for disk space 80K, the image that stores 1,500,000 vehicles accounts for disk space 144G, specifically decides on the control point vehicle flowrate, can store above information of vehicles half a year generally speaking at least.When hard drive space is not enough, automatically to the writing time of information of vehicles and the picture covering that circulates the earliest.Control module comprises image acquisition and processing submodule, the automatic recognin module of car plate and database.Wherein the automatic recognin module of car plate comprises: car plate location, car plate cutting, car plate identification, license plate recognition result decision-making.
The car plate locating module: this module is the basis of follow-up link, and its accuracy is huge to the influence of overall system performance.Native system adopts based on the algorithm of locating license plate of vehicle of the various features fusion of characteristic remarkable and finishes the car plate location, is applicable to various complicated background environment and different camera angle.
Car plate cutting module: adopt the character cutting algorithm based on connected domain, on the basis of basic UNICOM's domain lookup algorithm, increased the detection in UNICOM territory, and provided 4 check criteria.
The car plate identification module: native system adopts ORC to finish the identification of car plate.
The license plate recognition result decision-making module: native system can carry out Real time identification to every frame video image, therefore passes through in the process in the visual field at a car, and native system will obtain some identical or different recognition results.This just needs the decision-making module of a recognition result, specifically, decision-making module utilizes the historical record (comprising recognition result, recognition credibility, track record, similarity record etc.) that stays in the process of a car plate through the visual field, recognition result is carried out intelligentized decision-making, obtain the comprehensive confidence level evaluation of this car plate by calculating observation frame number, recognition result stability, trajectory stability, speed stability, average confidence level and similarity isometry value, thereby determine it is to continue to follow the tracks of this car plate, still export recognition result, or refuse this result.The final recognition result of a car plate is by analyzing the recognition result of all frames, they are carried out intelligentized classification and ballot, and forms in conjunction with certain grammatical informix.This method synthesis has utilized the information of all frames, has reduced in the past the accidental error that the recognition methods based on single image brings, and has improved correctness and the robustness of discrimination and the recognition result of system greatly.
Transmission unit: a pair of fiber optical transceiver of each control point design and installation (10/100M self-adaptation) or multi-channel video multiplexed optical terminal.
Central manage-ment unit: the native system central manage-ment unit mainly comprises database server, the network switch and inquiry workstation.Each user terminal has corresponding authority respectively, is the internal user in the public security net, carries out differentiated control, and total system adopts C/S and B/S structure, mainly finishes inquiry, deploys to ensure effective monitoring and control of illegal activities, warning function.
Claims (5)
- A kind of public security smart card port system is characterized in that comprising:Shooting and floor light unit: comprise high-definition camera and light filling lamp, be used for round-the-clock vehicle and the license board information of catching, every track disposes a feature video camera at least, panoramic camera of each travel direction configuration;Vehicle detection unit: comprise and detect main frame and ground induction coil, be used for finishing the mensuration of vehicle detection, the speed of a motor vehicle and numeration and the statistics of vehicle flowrate; When vehicle passed through ground induction coil, ground induction coil produced induced signal and also sends it to the detection main frame, detected main frame and measured the speed of a motor vehicle and statistical vehicle flowrate according to these induced signals;Image acquisition and processing unit: comprise industrial computer, video frequency collection card and control module, video frequency collection card, control module is installed in the industrial computer, video frequency collection card receives by video camera and passes the video flowing of coming, control module comprises image acquisition and processing submodule and the automatic recognin module of car plate, convert the analog video image signals of video camera to digital picture by video frequency collection card, when detecting main frame and detected vehicle and pass through, the image acquisition submodule this moment of intercepting one width of cloth feature in the video flowing of feature video camera, intercept a Zhang Quanjing picture simultaneously in the video flowing of panoramic camera, feature is finished license board information identification through car plate recognin module;Transmission unit: comprise remote network communication module, transmission equipment fiber optic and transmission line optical fiber; Be used for make a video recording and the vision signal of floor light unit collection and the car test signal of vehicle detection unit detection are transferred to industrial computer;Central manage-ment unit: comprise database server, the network switch and inquiry workstation, inquiry workstation and database server direct interconnection network switch, central manage-ment unit adopts C/S and B/S structure, is used for finishing Query Information, deploys to ensure effective monitoring and control of illegal activities, warning function; The license board information that database server reception and memory image collection and processing unit identify, feature and the panoramic pictures of the intercepting of image acquisition submodule are stored in the database server;Shooting and floor light unit outputting video signal, vehicle detection unit output car test signal, the signal input part that the car test signal of output and vision signal are input to image acquisition and processing unit, the signal output part output license board information of image acquisition and processing unit, the license board information of output is input to the signal input part of central manage-ment unit, and central manage-ment unit is deposited into license board information in the database.
- Public security smart card port system according to claim 1 is characterized in that: described shooting and floor light unit adopt ceramic golden halogen CDM floodlight light filling.
- Public security smart card port system according to claim 1 is characterized in that: two ground induction coils are buried in each track, described vehicle detection unit underground, detect main frame and adopt toggle switch that detection sensitivity is set.
- :Public security smart card port system according to claim 1 is characterized in that the collection of described image and the license board information recognition methods that processing unit adopts, and concrete steps are as follows:The first step is analyzed video flowing, the vehicle in the image is followed the tracks of the intercepting feature;In second step, employing is finished the car plate location based on the algorithm of locating license plate of vehicle of the various features fusion of characteristic remarkable;The 3rd step, adopt the cutting of finishing number-plate number character based on the character cutting algorithm of connected domain, concrete steps are as follows:3.1 number-plate number character height is estimated;1) car plate is converted into white gravoply, with black engraved characters;2) the car plate vertical edge detects, and at first uses the Sobel operator to finish rim detection to car plate, uses the OTSU method to obtain the vertical mapping of car plate then, and edge pixel replaces with black, and other pixels replace with white, find the vertical edge of car plate;3) horizontal projection finds coboundary and the lower boundary of number-plate number character;3.2 number-plate number character duration is estimated;1) use the OTSU algorithm to find out threshold value, finish the license plate image binaryzation;2) vertical projection greater than 6 pixels and less than the piece of the wideest piece, uses the mean value of these pieces as the estimated value of character duration for width;3.3 extract the differentiation character block by connected domain, comprise connected domain detection and connected domain and check two parts;1) connected domain detection algorithm;At first, a label counting is created and is initialized as 1, and then, binary picture is by from left to right, scanning from top to bottom;1. for each pixel, check whether northeast, north, northwest and the western pixel of 8 – connected domains is foreground pixels;2. if the neighbours that do not meet then compose the value of region-counter to this zone, this region-counter adds 1;3. if having only neighbours that meet, pixel is distributed to this zone, if a plurality of neighbours meet and all be the same area, pixel value is distributed to this zone;4. if a plurality of neighbours coupling and in zones of different is assigned in these zones any one to pixel, records all these zones and be equivalent region;5. scan image, and give identical regional value with the zone of all equivalences;Scanning stops, the pixel that does not indicate in image;2) connected domain inspection, rule criterion is as follows:The rule 1: if the coboundary of a connected domain less than overall coboundary, if or its coboundary greater than overall lower boundary, then this connected domain is not contain character;Rule 2: if the depth-width ratio of a connected domain greater than 0.8 or less than 0.3, then this connected domain is assumed that and does not contain character;Rule 3: if the area of this connected domain greater than the sixth of the size of general image, then needs further to cut apart;Rule 4: if the detected connected domain quantity of success surpasses 7 or be lower than 3, then need to reexamine;The connected domain that does not satisfy above-mentioned standard is regarded as not containing character, and is therefore deleted; After all connected domains of given car plate were examined, this process was finished;In the 4th step, adopt ORC to finish the identification of the number-plate number;The 5th step, every frame video image is carried out above-mentioned Real time identification, recognition result is made a strategic decision, namely obtain the comprehensive confidence level evaluation of this car plate by calculating observation frame number, recognition result stability, trajectory stability, speed stability, average confidence level and measuring similarity value, thereby determine it is to continue to follow the tracks of this car plate, still export recognition result, or refuse this result.
- Public security smart card port system according to claim 1 is characterized in that described industrial computer built in hardware house dog, and adopts integrated mainboard.
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