Vehicle Recognition System

Abstract

To reduce a cost for installing an apparatus required for discriminating five-model classification by an entrance ETC system 10A, and improve a vehicle recognition ratio at an entrance ETC and an exit ETC by the entrance ETC system 10A.SOLUTION: An entrance ETC system 10A includes: a front number plate reading device 13A that acquires a front image captured by a front camera that images a vehicle 9A from a front side to extract information on a front number plate from the front image; and a rear number plate reading device 19A that acquires a rear image captured by a rear camera that images the vehicle 9A captured by the front camera from a rear side to extract information on a rear number plate from the rear image.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a vehicle recognition system that recognizes vehicles that use toll roads. [Background technology]

[0002] There is a technology for tolling vehicles based on an image captured from the front of the vehicle (see, for example, Patent Document 1). However, the ETC (Electronic Toll Collection) system has the following problems. ETC is a registered trademark.

[0003] That is, when charging tolls to vehicles based on images taken from the front of the vehicle, it is necessary to install many sensors, such as vehicle height sensors and vehicle width sensors, in addition to the image taking device in order to distinguish between the five vehicle types, which results in high costs. Also, there is a problem that the vehicle recognition rate cannot be improved by simply taking an image of the vehicle from the front, and there is a problem that the recognition rate cannot be improved by simply taking an image of the vehicle from the front. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2020 / 084746 Summary of the Invention [Problem to be solved by the invention]

[0005] The vehicle recognition system according to the present disclosure aims to reduce the cost of installing equipment required for distinguishing between the five vehicle types. The vehicle recognition system according to the present disclosure also aims to improve the vehicle recognition rate at entrance ETCs and exit ETCs. [Means for solving the problem]

[0006] The vehicle recognition system according to the present disclosure includes: a front license plate reader that acquires a front image captured by a front camera that captures an image of the vehicle from the front and extracts information about the front license plate from the front image; a rear license plate reader that acquires a rear image taken by a rear camera that takes an image of the same vehicle as the vehicle photographed by the front camera from the rear, and extracts information about the rear license plate from the rear image; Equipped with. [Effects of the Invention]

[0007] The vehicle recognition system of the present disclosure is equipped with a front NP reading device and a rear NP reading device, thereby reducing the cost of installing equipment required to distinguish between the five vehicle types and improving the vehicle recognition rate at entrance ETCs and exit ETCs. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram of the first embodiment, showing an overview of a system serving as a comparative example. [Figure 2] FIG. 1 is a diagram of the first embodiment, showing an outline of an entrance ETC system 10A, an exit ETC system 20A, and an exit FFETC system 30A. [Figure 3] FIG. 1 is a diagram of the first embodiment, showing the block configurations of an entrance ETC system 10 of a comparative example, an exit ETC system 20 of a comparative example, and an exit FFETC system 30 of a comparative example. [Figure 4] FIG. 1 is a diagram of the first embodiment, showing the block configurations of an entrance ETC system 10A, an exit ETC system 20A, and an exit FFETC system 30A. [Figure 5] FIG. 1 is a diagram of the first embodiment, showing the processing flow of the entrance ETC system 10 and the entrance ETC system 10A. [Figure 6] FIG. 1 is a diagram of the first embodiment, showing the processing flow of the exit ETC system 20 and the exit ETC system 20A. [Figure 7] FIG. 10 is a diagram of the first embodiment, showing the processing flow of the exit FFETC system 30 and the exit FFETC system 30A. [Figure 8] FIG. 1 is a diagram of the first embodiment, showing the hardware configuration of an ETC data processing device 11A and the like. DETAILED DESCRIPTION OF THE INVENTION

[0009] In the description of the embodiments and in the drawings, the same and corresponding elements are designated by the same reference numerals. Descriptions of elements with the same reference numerals will be omitted or simplified as appropriate. In the following embodiments, the word "part" may be appropriately interpreted as "circuit," "step," "procedure," "process," or "circuitry."

[0010] Embodiment 1 Fig. 1 shows an overview of a system as a comparative example, and Fig. 2 shows an overview of an ETC system according to the first embodiment.

[0011] (Comparative Example) The comparative example system is as follows: A front camera 71 is installed at the ETC entrance gate 7. From the image of the front camera 71, NP character recognition of the front license plate (hereinafter referred to as NP) installed on the front of the vehicle is performed, and the recognition result is recognized as ": Shinagawa 200 A 12-3X." The five vehicle type categories of vehicle 9 are identified by various sensors such as vehicle height sensors and vehicle width sensors installed at ETC exit gate 7. The five vehicle type categories for vehicle toll classification are light vehicles, standard vehicles, medium-sized vehicles, large vehicles, and extra-large vehicles. ETC exit gate 8 is also equipped with a front camera 81. From the image of front camera 81, NP character recognition of the front NP is recognized as ": Shinagawa 200 a 12-3X". The NP information at ETC entrance gate 7 and ETC exit gate 8 is matched at the entrance / exit to determine the toll. The NP character recognition rate of the comparative example system is high at around 99%, but the matching accuracy is insufficient.

[0012] FIG. 2 shows an overview of the ETC system according to the first embodiment. In the following description, all ETC systems and devices according to the first embodiment are designated by the letter "A" to distinguish them from the comparative example. In FIG. 2, a front camera 71A and a rear camera 72A are installed at the ETC entrance gate 7A. The front camera 71A transmits images to a front NP reader 13A (described later), and the rear camera 72A transmits images to a rear NP reader 19A (described later). The ETC system according to the first embodiment is as follows. The front camera 71A performs NP character recognition, and the rear camera 72A performs NP character recognition on the rear NP. Vehicle dimension information is also extracted by the front camera 71A and the rear camera 72A. The vehicle dimension information is information indicating the dimensions of the vehicle 9A. The vehicle dimension information is dimension information that can identify specific vehicle dimensions of the vehicle 9A in one of five vehicle categories. For example, the vehicle dimension information (hereinafter referred to as dimension information) includes dimensions such as vehicle length, vehicle width, and vehicle height, as shown below. The ETC entrance gate 7A is also equipped with an axle number sensor that outputs axle number information such as "2 axles." In the ETC system according to the first embodiment, the ETC exit gate 8A has the same configuration as the ETC entrance gate 7A. In the ETC system according to the first embodiment, the NP information and NP image are matched at the entrance / exit to determine the toll. By performing the matching process using two or more cameras in this way, it is possible to improve accuracy compared to the system of the comparative example. In FIG. 2, the pair of the front camera and the rear camera is installed at at least one of the entrance and exit of the toll road.

[0013] ***Configuration Description*** FIG. 3 shows block configurations of an entrance ETC system 10 of the comparative example, an exit ETC system 20 of the comparative example, and an exit FF (Free Flow) ETC system 30 of the comparative example. FIG. 4 shows block configurations of an entrance ETC system 10A, an exit ETC system 20A, and an exit FFETC system 30A according to the first embodiment.

[0014] The block configuration of the comparative example will be described with reference to Figure 3. The entrance ETC system 10 includes an ETC data processing device 11, a sensor data processing device 12, a front NP reader 13, a vehicle detector / axle number sensor 14, a vehicle height sensor 15, a vehicle width sensor 16, a vehicle length sensor 17, and a communication antenna 18.

[0015] The exit ETC system 20 includes an ETC data processing device 21 and a communication antenna 28 .

[0016] The exit FFETC system 30 includes an ETC data processing device 31, a sensor data processing device 32, a front NP reader 33, and a communication antenna 38.

[0017] The ETC system according to the first embodiment will be described with reference to Fig. 4. The ETC system according to the first embodiment includes an entrance ETC system 10A, an exit ETC system 20A, and an exit FFETC system 30A. The entrance ETC system 10A, exit ETC system 20A, and exit FFETC system 30A are all vehicle recognition systems. The entrance ETC system 10A is equipped with an ETC data processing device 11A, a sensor data processing device 12A, a front NP reader 13A, a vehicle detector / axle number sensor 14A, a communication antenna 18A, and a rear NP reader 19A. The entrance ETC system 10A obtains information necessary for measuring vehicle dimensions using the vehicle height sensor 15, vehicle width sensor 16, and vehicle length sensor 17 in the entrance ETC system 10A from the front NP reader 13A and rear NP reader 19A.

[0018] The front license plate reader acquires a front image taken by a front camera that photographs a vehicle from the front and extracts information about the front license plate from the front image. The rear license plate reader acquires a rear image taken by a rear camera that photographs the same vehicle as the one photographed by the front camera from the rear and extracts information about the rear license plate from the rear image. The front license plate reader extracts the dimensions of the vehicle from the image of the vehicle photographed by the front camera. The rear license plate reader extracts the dimensions of the same vehicle from the image of the same vehicle photographed by the rear camera.

[0019] The configurations of the exit ETC system 20A and the exit FFETC system 30A are the same as those of the entrance ETC system 10A, but may be optional as described below.

[0020] The exit ETC system 20A is equipped with an ETC data processing device 21A and a communication antenna 28A. Optionally, the exit ETC system 20A is equipped with a front NP reader 23A, a rear NP reader 29A, and a vehicle detector / axle number sensor 24A. If the front NP reader 23A, the rear NP reader 29A, and the vehicle detector / axle number sensor 24A are equipped, the exit ETC system 20A will naturally also be equipped with a sensor data processing device 22A. By installing an entrance / exit matching system 50A, the exit ETC system 20A can confirm that the vehicle is the same by comparing the information from the entrance ETC system with the information from the exit ETC system.

[0021] The exit FFETC system 30A includes an ETC data processing device 31A, a sensor data processing device 32A, a front NP reader 33A, a communication antenna 38A, and a rear NP reader 39A. Optionally, the exit FFETC system 30A may also include a vehicle detector / axle number sensor 34A.

[0022] ***Explanation of Operation*** <Entrance ETC system> Fig. 5 shows the processing flow of the entrance ETC system 10 as a comparative example and the entrance ETC system 10A according to embodiment 1. The left side of Fig. 5 is a flowchart of the entrance ETC system 10 as a comparative example. The right side of Fig. 5 is a flowchart of the entrance ETC system 10A according to embodiment 1. The difference between the two flowcharts is steps S11 and S101. Steps S12 to S14 are the same as steps S102 to S104, respectively. Each operation of the entrance ETC system 10A of the entrance ETC system 10 will be described with reference to Figures 5, 3 and 4.

[0023] (Step S11) Please refer to the entrance ETC system 10 in FIG. The sensor data processing device 12 includes: (1) NP information 13-1 transmitted by the front NP reader 13; (2) Axle number information 14-1 transmitted by the vehicle detector / axle number sensor 14; (3) Vehicle height information transmitted by the vehicle height sensor 15; (4) Vehicle width information transmitted by the vehicle width sensor 16; (5) Vehicle length information transmitted by the vehicle length sensor 17; The sensor data processing device 12 performs a process of distinguishing between the five vehicle types of the vehicle 9 from the received information, and determines a fee category 12-1 from the result of the distinction.

[0024] (Step S12) The sensor data processing device 12 transmits the fee category 12-1 and the NP information 13-1 to the ETC data processing device 11 and the entrance / exit matching system 50.

[0025] (Step S13) The ETC data processing device 11 communicates with the vehicle-mounted device 90 via the communication antenna 18 and writes the entrance information 7-1 into the vehicle-mounted device 90. The entrance information 7-1 is information including the entrance entry time, the toll gate number, and NP information 13-1 at the ETC entrance. The ETC data processing device 11 acquires the on-board device information 90-1 from the on-board device 90 via the communication antenna 18.

[0026] (Step S14) The ETC data processing device 11 transmits the vehicle-mounted device information 90-1 and the NP information 13-1 to the ETC central device 40.

[0027] (Step S101) Referring to the entrance ETC system 10A in Figure 4, the sensor data processing device 12A receives NP information 13A-1, 19A-1 and vehicle dimension information 13A-2, 19A-2 transmitted from the front NP reader 13A and the rear NP reader 19A. The sensor data processing device 12A also receives axle number information 14A-1 transmitted from the vehicle detector / axle number sensor 14A. The sensor data processing device 12A performs a five-vehicle type discrimination process using the NP information 13A-1, 19A-1, vehicle dimension information 13A-2, 19A-2, and axle number information 14A-1. The sensor data processing device 12A determines the fee category 12A-1 of the vehicle 9A based on the vehicle type discrimination result.

[0028] (Step S102) The sensor data processing device 12A transmits the fee category 12A-1 and the NP information 13A-1 and 19A-1 to the ETC data processing device 11A and the entrance / exit matching system 50A.

[0029] In this way, the sensor data processing device 12A is a transmitting device that transmits information on the front license plate and the rear license plate to a matching system that performs matching to determine whether a vehicle entering a toll road entrance and a vehicle exiting from the exit are the same vehicle. In this way, the front license plate reader extracts vehicle dimensions from an image of the vehicle captured by the front camera. The rear license plate reader extracts vehicle dimensions from an image of the same vehicle captured by the rear camera. The sensor data processing device 12A determines the toll category for the same vehicle when traveling on a toll road based on the vehicle dimensions extracted by the front license plate reader and the same vehicle dimensions extracted by the rear license plate reader. The sensor data processing device 12A transmits the determined toll category to the matching system that performs matching to determine whether a vehicle entering a toll road entrance and a vehicle exiting from the exit are the same vehicle. The sensor data processing device 12A is a transmitting device.

[0030] (Step S103) The ETC data processing device 11A communicates with the vehicle-mounted device 90A via the communication antenna 18A and writes entrance information 7A-1 to the vehicle-mounted device 90A. The ETC data processing device 11A acquires vehicle-mounted device information 90A-1 from the vehicle-mounted device 90A via the communication antenna 18A.

[0031] (Step S104) The ETC data processing device 11A transmits the vehicle-mounted device information 90A-1 and the NP information 13A-1 and 19A-1 to the ETC central device 40A.

[0032] <Exit ETC System> Fig. 6 shows the processing flow of the exit ETC system 20 as a comparative example and the exit ETC system 20A according to the first embodiment. The left side of Fig. 6 is a flowchart of the exit ETC system 20 as a comparative example. The right side of Fig. 6 is a flowchart of the exit ETC system 20A. The operation of the exit ETC system 20 as a comparative example and the operation of the exit ETC system 20A according to the first embodiment will be described with reference to Fig. 6, Fig. 3 and Fig. 4.

[0033] (Step S21) Referring to the exit ETC system 20 in Fig. 3, the ETC data processing device 21 receives the entrance information 7-1 from the vehicle-mounted device 90 via the communication antenna .

[0034] (Step S22) The ETC data processing device 21 determines the fee from the entrance information 7-1 and the fee table 21-1, and transmits usage details information 91-1 to the vehicle-mounted device 90 via the communication antenna .

[0035] (Step S201) Referring to the exit ETC system 20A in Fig. 4, when the ETC data processing device 21A detects that the vehicle 9A has passed through the communication area of ​​the communication antenna 28A, it attempts to communicate with the vehicle-mounted device 90A.

[0036] (Step S202) The process loops until communication with the vehicle-mounted device 90A is successful. If communication is successful, the process proceeds to step S203.

[0037] (Step S203) The vehicle-mounted device 90A transmits the entrance information 7A-1 to the ETC data processing device 21A via the communication antenna 28A.

[0038] (Step S204) The ETC data processing device 21A determines the fee from the entrance information 7A-1 and the fee table 21A-1, and transmits usage details information 91A-1 to the vehicle-mounted device 90A via the communication antenna 28A.

[0039] (Step S301) The operation of sensor communication in the exit ETC system 20A of Fig. 4 will be described. The front NP reader 23A and the rear NP reader 29A transmit NP information 23A-1, 29A-1 and vehicle dimension information 23A-2, 29A-2 to the entrance / exit matching system 50A via the sensor data processing device 22A. In addition, the vehicle detector / axle number sensor 24A transmits axle number information 24A-1 to the entrance / exit matching system 50A via the sensor data processing device 22A.

[0040] (Step S302) The entrance / exit matching system 50A acquires ETC data 40A-1 from the ETC central device 40A and performs matching for vehicles that have failed in ETC communication. Here, the ETC data 40A-1 is information including the information acquired by the ETC central device 40A from the ETC data processing device 11A (step S104).

[0041] <Exit FFETC System> FIG. 7 shows the processing flows of the exit FFETC system 30 of the comparative example and the exit FFETC system 30A according to embodiment 1. The left side of FIG. 7 is a flowchart of the exit FFETC system 30 of the comparative example. The right side of FIG. 7 is a flowchart of the exit FFETC system 30A according to embodiment 1. The flowchart of the exit FFETC system 30A is the same as the flowchart of the exit ETC system 20A. In other words, the operation of the exit ETC system 20A and the exit FFETC system 30A is the same. The operation of the exit ETC system 20 of the comparative example and the operation of the exit ETC system 20A according to embodiment 1 will be described with reference to FIG. 6, FIG. 3, and FIG. 4. The exit FFETC system 30 and the exit FFETC system 30A differ in steps S41 and S301. Steps S31 to S34 and steps S201 to S204 are the same, and steps S42 and S202 are the same.

[0042] (Step S31) Referring to the exit FFETC system 30 in Fig. 3, when the ETC data processing device 31 detects that the vehicle 9 has passed through the communication area of ​​the communication antenna 38, it attempts to communicate with the in-vehicle device 90.

[0043] (Step S32) The process loops until the communication with the vehicle-mounted device 90 is successful. If the communication is successful, the process proceeds to step S33.

[0044] (Step S33) The vehicle-mounted device 90 transmits the entrance information 7-1 to the ETC data processing device 31 via the communication antenna 38.

[0045] (Step S34) The ETC data processing device 31 determines the fee from the entrance information 7-1 and the fee table 31-1, and transmits usage details information 91-1 to the vehicle-mounted device 90 via the communication antenna .

[0046] (Step S41) The operation of sensor communication in the exit FFETC system 30 will be described with reference to the exit FFETC system 30 in Figure 3. The front NP reader 33 transmits NP information 33-1 to the entrance / exit matching system 50 via the sensor data processing device 32.

[0047] (Step S42) The entrance / exit matching system 50A acquires ETC data 40-1 from the ETC central device 40A and performs matching for vehicles that have failed in ETC communication. Here, the ETC data 40-1 is information including the information acquired by the ETC central device 40A from the ETC data processing device 11 (step S14).

[0048] (Step S401) See the exit FFETC system 30A in Fig. 4. When the ETC data processing device 31A detects that the vehicle 9A has passed through the communication area of ​​the communication antenna 38A, it attempts to communicate with the in-vehicle device 90A.

[0049] (Step S402) The process loops until communication with the vehicle-mounted device 90A is successful. If communication is successful, the process proceeds to step S403.

[0050] (Step S403) The vehicle-mounted device 90A transmits the entrance information 7A-1 to the ETC data processing device 31A via the communication antenna 38A.

[0051] (Step S404) The ETC data processing device 31A determines the fee from the entrance information 7A-1 and the fee table 31A-1, and transmits usage details information 91A-1 to the vehicle-mounted device 90A via the communication antenna 38A.

[0052] (Step S501) The front NP reader 33A and the rear NP reader 39A transmit NP information 33A-1, 39A-1 and vehicle dimension information 33A-2, 39A-2 to the entrance / exit matching system 50A via the sensor data processing device 32A. The vehicle detector / axle number sensor 34A transmits axle number information 34A-1 to the entrance / exit matching system 50A via the sensor data processing device 32A.

[0053] (Step S502) The entrance / exit matching system 50A acquires ETC data 40A-1 from the ETC central device 40A and performs matching for vehicles that have failed in ETC communication.

[0054] The ETC system according to the first embodiment has the following three configurations (1), (2), and (3) as means for solving the problems of the comparative example. (1) Entrance ETC system The entrance ETC system 10 of the comparative example determines one of five vehicle types from vehicle dimension information, number of axles, and NP information using a front NP reader 13, a vehicle detector / axle number sensor 14, a vehicle height sensor 15, a vehicle width sensor 16, and a vehicle length sensor 17. In contrast, the entrance ETC system 10A according to the first embodiment adds a rear NP reader 19A instead of the vehicle height sensor 15, vehicle width sensor 16, and vehicle length sensor 17. In the entrance ETC system 10A, vehicle dimensions are measured by a front NP reader 13A and a rear NP reader 19A, which reduces the number of devices such as sensors and enables the system to be built at low cost. (2) In addition to acquiring front NP information at the entrance in the comparative example, rear NP information at the entrance is also acquired. This makes it possible to improve the matching accuracy using NP information. (3) The exit ETC system 20A and the exit FFETC system 30A are equipped with a front NP reader, a rear NP reader, a vehicle detector / axle number sensor, and a sensor data processor. This configuration enables entrance / exit matching based not only on NP information but also on axle number information and vehicle dimension information, improving matching accuracy. Furthermore, by making the system dedicated to ETC, it becomes unmanned, and high-precision matching and charging becomes possible even for vehicles that have failed ETC communication.

[0055] As described above, the ETC system according to the first embodiment can provide a highly accurate matching rate to the system that determines toll road fees by matching vehicles at the entrance and exit.

[0056] In the entrance ETC system 10A, when the rear camera 72A is employed in addition to the front camera 71A, the following effects are obtained. The NP reading rate of the front camera 71A is about 95%. If the recognition rate of the NP reading by the rear camera 72A is about 90%, the result will be 99.5% as shown below. That is, 100%-(100%-95%)×(100%-90%)=99.5% In this way, the NP recognition rate is improved.

[0057] In addition, by extracting vehicle dimension information using the front and rear cameras and acquiring axle information from the axle number sensor, the matching rate between vehicle entrances and exits can be improved. This configuration also improves the discrimination rate between the five vehicle type categories, which are vehicle fare categories.

[0058] (Hardware configuration supplement) FIG. 8 shows the hardware configuration of the ETC data processing device 11A, sensor data processing device 12A, front NP reader 13A, vehicle detector / axle number sensor 14A, and rear NP reader 19A. The ETC data processing device 11A and the like are computers configured as shown in FIG. 8. This computer includes a processor 110, a main memory device 120, an auxiliary memory device 130, and an interface device 140. The processor 110 includes a control unit 111. The control unit 111 executes the processing performed by the ETC data processing device 11A, sensor data processing device 12A, front NP reader 13A, vehicle detector / axle number sensor 14A, and rear NP reader 19A. The operation of the control unit 111 is performed by a program 131 stored in the auxiliary memory device 130. The interface device 140 connects the processor 110 to other devices. [Explanation of symbols]

[0059] 7, 7A ETC entrance gate, 7-1, 7A-1 Entrance information, 71, 71A Front camera, 72A Rear camera, 8, 8A ETC exit gate, 81, 81A Front camera, 82A Rear camera, 9, 9A Vehicle, 90, 90A On-board unit, 90-1, 90A-1 On-board unit information, 91-1, 91A-1 Usage details information, 10, 10A Entrance ETC system, 11, 11A ETC data processing device, 12, 12A Sensor data processing device, 12-2, 12A-2 Fee classification, 13, 13A Front NP reader, 13-1 NP information, 13A-1 NP information, 13A-2 Dimension information, 14, 14A Vehicle detector / axle number sensor, 14-1, 14A-1 Axle number information, 15 Vehicle height sensor, 16 Vehicle width sensor, 17 Vehicle length sensor, 18, 18A Communication antenna, 19A Rear NP reader, 19A-1 NP information, 19A-2 Vehicle dimension information, 20, 20A Exit ETC system, 21, 21A ETC data processing device, 21-1 Toll table, 21A-1 Toll table, 22A Sensor data processing device, 23A Front NP reader, 23A-1 NP information, 24A Vehicle detector / axle number sensor, 28, 28A Communication antenna, 29A Rear NP reader, 29A-1 NP information, 30, 30A Exit FFETC system, 31, 31A ETC data processing device, 32, 32A Sensor data processing device, 33, 33A Front NP reader, 33-1 NP information, 33A-1 NP information, 33A-2 Vehicle dimension information, 34A Vehicle detector / axle number sensor, 38, 38A Communication antenna, 39A rear NP reader, 40,40A ETC central device, 40-1,40A-1 ETC data, 50,50A entrance / exit matching system.

Claims

[Claim 1] a front license plate reader that acquires a front image taken by a front camera installed at at least one of the entrance and exit of a toll road, extracts information about a front license plate from the front image, and extracts the dimensions of the vehicle from the image of the vehicle taken by the front camera; a rear license plate reader that acquires rear images taken by a rear camera installed at the entrance or exit of the toll road where the front camera is installed, photographing the same vehicle as the vehicle photographed by the front camera from behind, extracts rear license plate information from the rear images, and extracts the dimensions of the same vehicle from the image photographed by the rear camera; a transmitting device that determines the toll category of the same vehicle when traveling on the toll road based on the dimensions of the vehicle extracted by the front license plate reading device and the dimensions of the same vehicle extracted by the rear license plate reading device, and transmits the determined toll category, the information on the front license plate, and the information on the rear license plate to a matching system that matches whether a vehicle entering an entrance to the toll road and a vehicle exiting from an exit are the same vehicle.

Images