KR101493009B1 - Method for front and rear vehicle license plate recognition and system thereof - Google Patents

Abstract

The present invention relates to a method of recognizing a plate number in a front and rear plate number recognizing system. The method comprises the following steps. A first camera photographs a front number plate of a vehicle moving in a first direction. A first recognizing module receives a first frame including the front plate number photographed by the first camera, recognizes the front plate number from the received first frame, and transmits a first recognition number corresponding to the recognized result to a management server. A second camera photographs a rear plate number of the vehicle moving in the first direction. The first recognizing module receives a second frame including the rear plate number photographed by the second camera, recognizes the rear plate number from the received second frame, and transmits a second recognition number corresponding to the recognized result to the management server. A third camera photographs a front plate number of the vehicle moving in a second direction that is opposite direction of the first direction. A second recognizing module receives a third frame including the front plate number photographed by the third camera, recognizes the front plate number from the received third frame, and transmits a third recognition number corresponding to the recognized result to the management server.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recognizing front and rear vehicle numbers,

An embodiment according to the concept of the present invention relates to a technology for recognizing a car number by utilizing a license plate recognition (LPR) system, and more particularly to a technology for recognizing a car number even if the front and rear license plates A method of recognizing a car number, and a system capable of performing the method.

The car number recognition system is a device for photographing a car license plate with a camera, detecting the license plate area by analyzing the photographed image, and extracting characters from the detected license plate area to recognize the car number.

The car number recognition system is used in unmanned parking management systems such as department stores, apartments, and paid parking lots due to many advantages such as eliminating the trouble of picking up parking tickets in a parking lot and enabling smooth and rapid entry and exit.

 The conventional car number recognition system captures both the front license plate and the rear license plate of a vehicle and attempts to derive a recognition value from the two license plate images.

However, when the license plate of the vehicle is severely damaged or contaminated, or the environment where the license plate is photographed is poor and the original characters are distorted, the recognition is often wrong.

In addition, an attempt to derive a single recognition value by uniformly applying smear or color deviation to a front plate and a rear plate of a vehicle having different shooting conditions has an inherent error.

Patent Registration No. 10-0991106 (November 11, 2010) Japanese Patent Application Laid-Open No. 10-1246120 (Mar. 23, 2013)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of accurately recognizing a vehicle number even when shooting conditions of a front license plate and a rear license plate are different, and a system capable of performing the method.

The method of recognizing a car number of a front and rear car number recognition system according to an embodiment of the present invention includes the steps of photographing a front license plate of a vehicle in which a first camera moves in a first direction, Receiving the first frame including the photographed front plate, recognizing the front plate from the received first frame, transmitting a first identification number corresponding to the recognition result to the management server, Capturing a rear license plate of the vehicle moving in the first direction, receiving the second frame including the rear license plate photographed by the second camera, Recognizing the rear license plate and transmitting a second identification number corresponding to the recognition result to the management server; Capturing the front license plate of the vehicle moving to the first license plate, the second recognition module receiving a third frame including the front license plate taken by the third camera, And transmitting a third identification number corresponding to the recognition result to the management server.

The management server may further include a step of comparing any one of the first identification number and the second identification number with the third identification number.

The management server compares the second identification number with the third identification number when the first identification number and the third identification number do not match.

The management server selecting one of the first recognition number and the second recognition number as the vehicle number of the vehicle according to the comparison result; Calculating a difference of one generation time, and calculating a parking charge for the vehicle using the calculation result.

Wherein the first frame is any one of a plurality of first frames, the second frame is any one of a plurality of second frames, and the third frame is any one of a plurality of third frames.

The vehicle front and rear vehicle identification systems according to the embodiments of the present invention include a first camera for photographing a front license plate of a vehicle moving in a first direction and a second camera for photographing a rear license plate of the vehicle moving in the first direction, Receiving a first frame including the front license plate photographed by the first camera, recognizing the front license plate from the received first frame, outputting a first recognition number corresponding to the recognition result, A first recognition module for receiving the second frame including the rear plate photographed by the second camera, recognizing the rear plate from the received second frame, and outputting a second recognition number corresponding to the recognition result, A third camera for photographing the front plate of the vehicle moving in a second direction opposite to the first direction, a third camera for photographing the front plate of the vehicle moving in a second direction opposite to the first direction, A second recognition module for receiving a third frame including a plate and recognizing the front plate from a received third frame and outputting a third recognition number corresponding to the recognition result; 2 identification number, and the third identification number.

The management server compares the third identification number with any one of the first identification number and the second identification number.

The management server compares the second identification number with the third identification number when the first identification number and the third identification number do not match.

The management server selects one of the first recognition number and the second recognition number as the vehicle number of the vehicle according to the comparison result, and based on the vehicle number of the vehicle, And calculates the parking fee for the vehicle using the calculation result.

The system for recognizing front and rear car numbers according to the embodiment of the present invention and the system capable of performing the method can photograph both the front license plate and the rear license plate of the vehicle and recognize each of the front license plate and the rear license plate from the photographed image , The vehicle number of the vehicle can be recognized by double processing the recognition result of the front license plate and the recognition result of the rear license plate.

Therefore, the system for recognizing the front and rear vehicle identification numbers according to the embodiment of the present invention and the system capable of performing the method can accurately recognize the vehicle number even when the photographing conditions of the front license plate and the rear license plate are different .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to more fully understand the drawings recited in the detailed description of the present invention, a detailed description of each drawing is provided.
1 is a view for explaining a front and rear car number recognition system according to an embodiment of the present invention.
FIG. 2 is a view for explaining a front and rear car number recognition system according to another embodiment of the present invention.
Fig. 3 shows a schematic block diagram of the front and rear car number recognition system shown in Fig. 1 or Fig.
4 is a specific block diagram of the first car number identification apparatus shown in Fig.
5 shows a specific block diagram of the second car number recognition apparatus shown in Fig.
6 shows an embodiment of a first memory operating method of the front and rear car number recognition system shown in Fig.
Fig. 7 shows an embodiment of the database table configuration of the front and rear car number recognition system shown in Fig.
8A and 8B are diagrams for explaining the operation of the front and rear car number recognition system shown in FIG.
9 to 12 are flowcharts for explaining the operation of the front and rear car number recognition system shown in Fig.
13A to 13C are diagrams for explaining the types of errors that may occur in the front and rear vehicle identification systems shown in Fig.

Specific structural and functional descriptions of embodiments of the present invention disclosed herein are illustrated for purposes of illustrating embodiments of the inventive concept only, And it should not be construed as limited to the embodiments described in this specification or the application.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first and / or second, etc. may be used to describe various components, but the components are not to be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

A module in this specification may mean hardware capable of performing the functions and operations according to the respective names described in this specification or may include computer program codes capable of performing specific functions and operations May mean an electronic recording medium, such as a processor, having computer program code embodied therein or capable of performing a particular function and operation.

In other words, a module may mean a functional and / or structural combination of hardware for carrying out the technical idea of the present invention and / or software for driving the hardware.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

1 is a view for explaining a front and rear car number recognition system according to an embodiment of the present invention. Referring to FIG. 1, the front and rear car number recognition systems (or front and rear car license plate recognition systems) 10A may include a first car number recognition device 100 and a second car number recognition device 200.

The first car number recognizing apparatus 100 can recognize the car number of the front license plate 500 of the vehicle 400 moving in the first direction (for example, entering the parking lot) and the car number of the rear license plate 600 .

The first camera 110 can photograph the front license plate 500 of the vehicle 400 moving in the first direction. For example, the first camera 110 may generate CCTV images for detecting license plates and number recognition, but the present invention is not limited thereto.

The second camera 130 may photograph the rear plate 600 of the vehicle 400 moving in the first direction. For example, the second camera 130 may be an apparatus for generating images for license plate detection and number recognition, but the present invention is not limited thereto.

The second car number identification device 200 can recognize the car number of the front license plate 500 of the vehicle 400 that moves in a second direction opposite to the first direction (e.g., from the car park).

The third camera 210 may photograph the front license plate 500 of the vehicle 400 moving in the second direction. For example, the third camera 210 may generate CCTV images for detecting license plate numbers and number recognition, but the present invention is not limited thereto.

FIG. 2 is a view for explaining a front and rear car number recognition system according to another embodiment of the present invention.

Except for the positions of the cameras 110 ', 130', and 210 ', the structure and operation of the front and rear car number recognition system 10B of FIG. 2 are identical to those of the front and rear car number recognition system 10A of FIG. Substantially the same or similar to the operation.

Fig. 3 shows a schematic block diagram of the front and rear car number recognition system shown in Fig. 1 or Fig. 1 to 3, a front and rear vehicle identification system 10A or 10B (collectively referred to as "10") includes a first vehicle identification apparatus 100, a second vehicle identification apparatus 200, And a management server 300.

The first vehicle number recognizing apparatus 100 may be referred to as a first camera 110 or 110 '(hereinafter collectively referred to as' 110 '), a second camera 130 or 130' ), And a first recognition module 120.

The first camera 110 can output an image of the front license plate 500 of the vehicle 400 when the vehicle 400 approaches. According to another embodiment, when the vehicle 400 approaches, the first camera 110 photographs the front license plate 500 of the vehicle 400 a plurality of times, and the plurality of frame images FR11 to FR1n (n = 2 Or more) can be output. Each of the plurality of frame images FR11 to FR1n may include photographing time information.

The first recognition module 120 receives the first frame FR1i (1? I? N) including the front license plate 500 of the vehicle 400 transmitted from the first camera 110, The front license plate 500 can be recognized from the frame FR1i and the first recognition number IN1 corresponding to the recognition result can be output to the management server 300. [

The second camera 130 can output an image of the rear license plate 600 of the vehicle 400 when the vehicle 400 moves away. According to another embodiment, the second camera 130 photographs the rear license plate 600 of the vehicle 400 a plurality of times and outputs a plurality of frame images FR21 through FR2n when the vehicle 400 moves away can do. Each of the plurality of frame images FR21 to FR2n may include photographing time information.

The first recognition module 120 receives the second frame FR2i (1? I? N) including the rear license plate 600 of the vehicle 400 transmitted from the second camera 130, The rear plate 600 can be recognized from the frame FR2i and the second recognition number IN2 corresponding to the recognition result can be output to the management server 300. [

The second vehicle identification apparatus 200 may include a third camera 210 or 210 ', collectively referred to as 210, and a second recognition module 220.

The third camera 210 can output an image of the front license plate 500 of the vehicle 400 when the vehicle 400 comes near and the front license plate 500 of the vehicle 400 can be photographed multiple times And output a plurality of frame images FR31 to FR3n. Each of the plurality of frame images FR31 to FR3n may include photographing time information.

The second recognition module 220 receives the third frame FR3i (1? I? N) including the front license plate 500 of the vehicle 400 transmitted from the third camera 210, The front license plate 500 can be recognized from the frame FR3i and the third recognition number IN3 corresponding to the recognition result can be output to the management server 300. [

The management server 300 may include a rate calculator 310 and a database 320.

The management server 300 may receive the first identification number IN1, the second identification number IN2, and the third identification number IN3. The detailed operation of the management server 300 will be described with reference to FIGS. 4 and 5. FIG.

Fig. 4 shows a specific block diagram of the first car number recognizing device shown in Fig. 3, and Fig. 5 shows a concrete block diagram of the second car number recognizing device shown in Fig.

1 to 5, the first recognition module 120 includes a first continuous image capture module 121, a first captured image number recognition module 122, a second continuous image capture module 123, A captured image number recognition module 124, a first loop detection signal processing module 125, a first memory controller 126, and a first memory 127.

The first continuous image capture module 121 receives one or more frame images FR11 through FR1n including an image of the front license plate 500 of the vehicle 400 transmitted from the first camera 110 To the first memory controller 126. The first memory controller 126 may store the received at least one frame image FR11 to FR1n in the first captured image storage area 128 of the first memory 127. [

The first captured image number recognition module 122 receives at least one frame image FR11 through FR1n stored in the first memory 127 through the first memory controller 126 and outputs the received at least one frame image FR1 to FR1n of the vehicle 400 and outputs the recognition result to the first memory controller 126. [ At this time, the first memory controller 126 may store the recognition result in the first number recognition storage area 129 of the first memory 127.

6 shows an embodiment of a method for operating the first memory 127 of the front and rear car number recognition system 10 shown in Fig.

The first captured image storage area 128 of the first memory 127 may store the plurality of frame images FR11 through FR1n according to the first-in first-out method, but the present invention is not limited thereto. The first number recognition storage area 129 of the first memory 127 may store recognition results corresponding to each of the plurality of frame images FR11 to FR1n according to the first-in first-out method, but the present invention is not limited thereto.

19 frame images # 00 to # 18 are stored in the first captured image storage area 128 and 19 recognition results # 00 to # 18 are stored in the first number recognition storage area 129. [ # 18) can be stored.

Referring again to FIGS. 1 and 4, the first vehicle identification apparatus 100 may further include a first loop coil 140 for detecting entry of the vehicle 400. The first loop coil 140 can detect the entry of the vehicle 400 and output the first detection signal DS1 to the first loop detection signal processing module 125. [

For example, as shown in Fig. 1, the first loop coil 140 is configured to apply a trigger on signal when the vehicle 400 entering the parking lot contacts the first loop coil 140 1 detection signal DS1.

The first loop detection signal processing module 125 can receive the first detection signal DS1 and output it to the first memory controller 126. [

The first memory controller 126 terminates the number recognition operation of the first captured image number recognition module 122 in response to the received first detection signal DS1, The final vehicle number can be determined as any one of recognition results # 00 to # 18 of the front license plate 500 stored in the recognition storage area 129. [

For example, the first memory controller 126 may apply a weight corresponding to the storage order to each of the recognition results # 00 to # 18 of the front license plate 500 stored in the first number recognition storage area 129 . 6, the first memory 127 stores the recognition results (# 00 to # 18) according to the first-in first-out method, and when the front license plate 500 is photographed, The most weighted value of the vehicle number recognized last among the recognition results of the front license plate 500 can be applied since it is close to the camera 110. [ Thus, the last recognized vehicle number can be determined to be the last vehicle number.

The first memory controller 126 can determine the final vehicle number by considering the number of times and the weight for the same recognition result among recognition results for the front license plate 500 stored in the first number recognition storage area 129. [

The first memory controller 126 may output the final vehicle number determined as the first recognition number IN1 to the management server 300. [ The first identification number IN1 may be displayed via a display (not shown).

According to the embodiment, the first car number recognition apparatus 100 may further include a second loop coil 150 for detecting the vehicle 400. [

The second loop coil 150 can output a trigger off signal as the second detection signal DS2 when the vehicle 400 entering the parking lot leaves the second loop coil 150 .

The operation in which the first recognition module 120 recognizes the rear license plate 600 of the vehicle 400 except for the second loop coil 150 outputs the second detection signal DS2 is performed by the first recognition module 120 is substantially the same as or similar to the operation of recognizing the front license plate 500 of the vehicle 400.

According to the embodiment, the second car number recognition apparatus 200 may further include a third loop coil 230 for sensing the vehicle 400. [ The second recognition module 220 includes a third continuous image capture module 221, a third captured image recognition module 222, a second loop detection signal processing module 223, a second memory controller 224, A memory 225, and the like.

The operation in which the second recognition module 220 recognizes the front license plate 500 of the vehicle 400 except for the third loop coil 230 outputs the third detection signal DS3 is performed by the first recognition module 120 is substantially the same as or similar to the operation of recognizing the front license plate 500 of the vehicle 400.

According to the embodiment, when the second loop coil 150 is not installed, the first memory controller 126 determines that the recognition result of the front license plate 500, which is output from the second captured image number recognition module 124, 1 number recognition storage area 129. If there is a recognition result identical to the recognition result as a result of the search, the number recognition operation of the second captured image number recognition module 124 is terminated. If the first number One of the recognition results of the front license plate 500 stored in the recognition storage area 129 can be confirmed as the final vehicle number.

The management server 300 receives the first recognition number IN1 and the second recognition number IN2 output from the first recognition module 120 and outputs the first recognition number IN1 and the second recognition number IN2, May be stored in the same column of the table of the database 320.

Fig. 7 shows an embodiment of the table configuration of the database of the front and rear car number recognition system shown in Fig. 7, the management server 300 recognizes the recognition result of the front license plate 500 of the vehicle 400, the imaging time, the recognition result of the rear license plate 600 of the entrance vehicle 400, The photographing time can be stored in the same column of the table of the database 320. [

The management server 300 can receive the third recognition number IN3 output from the second recognition module 220 and transmit the received third recognition number IN3 to the database 320 and the charge calculator 310 have.

The fare calculator 310 calculates the parking fee by selecting the vehicle number of the outgoing vehicle 400. The method of selecting the vehicle number of the outgoing vehicle 400 is as shown in Table 1.

[Table 1]

As shown in Table 1, the fare calculator 310 calculates a first recognition number IN1 stored in the database 320 (e.g., a recognition result of the front license plate 500 of the entering vehicle 400) (For example, the recognition result of the front license plate 500 of the outgoing vehicle 400) are the same. If the first recognition number IN1 and the third recognition number IN3 are the same, the fare calculator 310 calculates the difference between the current time and the generation time of the first recognition number IN1 based on the first recognition number IN1, To calculate the parking fee.

The rate calculator 310 determines whether the first recognition number IN1 and the third recognition number IN3 are the same or not based on the second recognition number IN2 stored in the database 320 The recognition result of the license plate 600) and the third recognition number IN3 are the same. If the second recognition number IN2 and the third recognition number IN3 are the same, the fare calculator 310 calculates the difference between the current time and the generation time of the second recognition number IN2 based on the second recognition number IN2, To calculate the parking fee.

If the second recognition number IN2 and the third recognition number IN3 are not the same, the fare calculator 310 treats the absence of entry details of the vehicle 400 as being absent and processes it through an administrator call. The manager can search the database 320 and manually calculate and charge the parking fee of the vehicle 400. [

The management server 300 can delete the first recognition number IN1 and the second recognition number IN2 stored in the same column of the table of the database 320 when the parking fee is processed.

Figs. 8A and 8B show the drawings for explaining the operation of the front and rear car number recognition system shown in Fig. 1. Fig.

1 to 8A, the first recognition module 120 recognizes the image 10-1 of the vehicle 400 photographed by the first camera 110, for example, the front license plate 500 of the vehicle 400, Recognizes the front license plate 500 from the received image 10-1 and displays the car number 10-2 corresponding to the recognition result, for example, the first recognition number IN1).

1 to 8B, the first recognition module 120 recognizes the image 20-1 of the vehicle 400 photographed by the second camera 130, for example, the rear license plate 600 of the vehicle 400, And recognizes the rear license plate 600 from the received image 20-1 and outputs the vehicle number 20-2 corresponding to the recognition result such as the second recognition number IN2.

The figure in which the second recognition module 220 recognizes the front license plate 500 of the vehicle 400 from the third camera 210 is substantially the same as that of FIG. 8A.

9 to 12 are flowcharts for explaining the operation of the front and rear car number recognition system shown in Fig.

1 to 9, the first car number recognizing apparatus 100 photographs each of the front license plate 500 and the rear license plate 600 of the vehicle 400 moving in the first direction, The front license plate 500 and the rear license plate 600 are recognized from the frame FR1i and the second frame FR2i respectively and the first recognition number IN1 and the second recognition number IN2 corresponding to the recognition result are managed To the server 300 (S100).

The operation of the first car number identification apparatus 100 is described with reference to Fig.

The first camera 110 may photograph the front license plate 500 of the vehicle 400 moving in the first direction (S101). The first recognition module 120 receives a plurality of frame images FR11 to FR1n including the front license plate 500 photographed by the first camera 110 and outputs the received plurality of frame images FR11- FR1n of the front license plate 500 of the vehicle 400 and store the recognition result in the first memory 127 (S102).

When the first detection signal DS1 is received from the first loop coil 140 (S103), the first recognition module 120 terminates the number recognition operation and determines which one of the recognition results is the final vehicle number , And transmits the determined vehicle number to the management server 300 as the first recognition number IN1 (S104).

The second camera 130 can photograph the rear license plate 600 of the vehicle 400 moving in the first direction (S105). The first recognition module 120 receives the plurality of frame images FR21 to FR2n including the rear face plate 600 photographed by the second camera 130 and outputs the received plurality of frame images FR21 to FR2n (Step S 106), and the recognition result may be stored in the first memory 127 (step S 106).

When the second detection signal DS2 is received from the second loop coil 150 (S107), the first recognition module 120 terminates the number recognition operation and determines which one of the recognition results is the final vehicle number , And transmits the confirmed vehicle number to the management server 300 as the second identification number IN2 (S108).

The management server 300 may store the first identification number IN1 and the second identification number IN2 in the same column of the table of the database 320 (S109).

The second car number recognizing apparatus 200 photographs the front license plate 500 of the vehicle 400 moving in the second direction opposite to the first direction and reads the front license plate 500 from the photographed third frame FR3i , And transmits the third recognition number IN3 corresponding to the recognition result to the management server 300 (S200).

The operation of the second car number recognition apparatus 200 will be described with reference to Fig.

The third camera 210 can photograph the front license plate 500 of the vehicle 400 moving in the second direction opposite to the first direction (S201). The second recognition module 220 receives the plurality of frame images FR31 to FR3n including the front license plate 500 photographed by the third camera 210 and outputs the received plurality of frame images FR31- FR3n of the vehicle 400, and stores the recognition result in the second memory 225 (S202).

When the third detection signal DS3 is received from the third loop coil 230 (S203), the second recognition module 220 terminates the number recognition operation and determines which one of the recognition results is the final vehicle number , And transmits the determined vehicle number to the management server 300 as the third recognition number IN3 (S204).

The management server 300 compares one of the first recognition number IN1 and the second recognition number IN2 with the third recognition number IN3 and calculates the parking charge based on the comparison result in step S300.

The operation of the management server 300 is described with reference to FIG.

The management server 300 retrieves the first identification number IN1 from the database 320 (S301). The management server 300 determines whether the first identification number IN1 and the third identification number IN3 are identical (S302). When the first identification number IN1 and the third identification number IN3 are equal to each other, the management server 300 determines the current time and the generation time of the first recognition number IN1 based on the first identification number IN1, And calculates the parking fee (S305).

The management server 300 searches the database 320 for the second identification number IN2 if the first identification number IN1 and the third identification number IN3 are not identical to each other (S303). The management server 300 determines whether the second identification number IN2 is identical to the third identification number IN3 (S304). If the second identification number IN2 and the third identification number IN3 are the same, the management server 300 determines whether or not the current time and the generation time of the second identification number IN2 The difference is calculated and the parking fee is calculated (S305).

If the second recognition number IN2 and the third recognition number IN3 are not the same, the management server 300 can process it as if there is no entry details of the vehicle 400 and process it through an administrator call (S306) .

13A to 13C are diagrams for explaining the types of errors that may occur in the front and rear vehicle identification systems shown in Fig.

In general, errors that may occur in the car number recognition system at the time of entry may be recognized (or all recognized), partially recognized, or unrecognized, Recognition, or unrecognition.

Therefore, the number of cases that can be shown in the conventional car number recognition system is nine, and the car number recognition system can be normally processed only when it is a true recognition type at the time of entering and leaving.

However, the front and rear car number recognition system 10A or 10B according to the embodiment of the present invention photographs the front license plate 500 and the rear license plate 600 of the vehicle 400, ) And the rear plate (600), and when the recognition results are stored in the database in duplicate, the number of cases that can occur is greatly reduced.

13A to 13C, FIG. 13A illustrates an error occurring in the first camera 110 photographing the front license plate 500 and an error occurring in the second camera 130 photographing the rear license plate 600 FIG. 13B shows a case where errors occurring in the first camera 110 photographing the front license plate 500 and errors occurring in the second camera 130 photographing the rear license plate 600 partially coincide with each other FIG. 13C shows a case where an error occurring in the first camera 110 photographing the front license plate 500 and an error occurring in the second camera 130 photographing the rear license plate 600 are completely inconsistent .

13B and 13C, the front and rear vehicle identification systems 10A and 10B according to the embodiment of the present invention detect an error occurring in the first camera 110 and an error generated in the second camera 130 The recognition result for the front license plate 500 and the recognition result for the rear license plate 600 are stored and processed in duplicate, so that the car number recognition error can be greatly reduced There is an effect.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10A or 10B; Vehicle identification system
100; The first car number identification device
200; The second vehicle identification number
300; Management server
400; vehicle
500; Front plate
600; Rear license plate
110 or 110 '; The first camera
120; The first recognition module
130 or 130 '; The second camera
140; The first loop coil
150; The second loop coil
210 or 210 '; Third camera
220; The second recognition module

Claims (9)

Photographing a front license plate of a vehicle in which the first camera moves in a first direction;
The first recognition module receives a plurality of first frames including the front license plate photographed by the first camera, recognizes the front license plate from each of the plurality of first frames received, ;
The first recognition module transmitting the determined first recognition number to the management server using the first recognition results;
Photographing a rear license plate of the vehicle in which the second camera moves in the first direction;
Wherein the first recognition module receives a plurality of second frames including the rear license plate photographed by the second camera, recognizes the rear license plate from each of the plurality of second frames received, Storing results;
Transmitting, by the first recognition module, a second recognition number determined using the second recognition results to the management server;
Photographing the front license plate of the vehicle in which the third camera moves in a second direction opposite to the first direction;
The second recognition module receives a plurality of third frames including the front license plate photographed by the third camera, recognizes the front license plate from each of the plurality of third frames received, ; And
And the second recognition module transmitting the determined third recognition number to the management server using the third recognition results,
Wherein the first recognition module transmits the first identification number determined using the first recognition results to the management server,
Applying each of the first weights corresponding to a storage order to each of the first recognition results;
Determining the first identification number using the first recognition results and the first weight values; And
And transmitting the first identification number to the management server,
Wherein the step of transmitting, by the first recognition module, the second recognition number determined using the second recognition results to the management server,
Applying each of the second weights corresponding to the storage order to each of the second recognition results;
Establishing the second identification number using the second recognition results and the second weights; And
And transmitting the second identification number to the management server,
Wherein the step of the second recognition module transmitting the third recognition number determined using the third recognition results to the management server comprises:
Applying each of the third weights corresponding to the storage order to each of the third recognition results;
Establishing the third identification number using the third recognition results and the third weights; And
And transmitting the third identification number to the management server. The management server according to claim 1,
Further comprising the step of comparing any one of the first recognition number and the second recognition number with the third recognition number to each other. The management server according to claim 2,
And comparing the second recognition number with the third recognition number when the first recognition number and the third recognition number do not match with each other. The management server according to claim 2,
Selecting one of the first recognition number and the second recognition number as the vehicle number of the vehicle according to the comparison result;
Calculating a difference between the current time and any one of the generation times based on the vehicle number of the vehicle; And
Further comprising calculating a parking charge for the vehicle using the calculation result. ≪ RTI ID = 0.0 > [10] < / RTI > delete A first camera for photographing a front license plate of a vehicle moving in a first direction;
A second camera for photographing a rear plate of the vehicle moving in the first direction;
Receiving a plurality of first frames including the front license plate photographed by the first camera, storing first recognition results generated by recognizing the front license plates from each of the plurality of first frames received, Applying each of the first weights corresponding to the storage order to each of the first recognition results and outputting a first recognition number determined using the first recognition results and the first weightings, Receiving a plurality of second frames including the rear license plate photographed by the first recognition module, storing second recognition results generated by recognizing the rear license plates from each of the received plurality of second frames, Each of the first recognition results applying second weighting values corresponding to the storage order to each of the first recognition results and outputting a second recognition number determined using the second recognition results and the second weightings, Expression module;
A third camera for photographing the front plate of the vehicle moving in a second direction opposite to the first direction;
Receiving a plurality of third frames including the front license plate photographed by the third camera, storing third recognition results generated by recognizing the front license plate from each of the plurality of third frames received, A second recognition module for applying each of the third weights corresponding to the storage order to each of the third recognition results and outputting a third recognition number determined using the third recognition results and the third weights; And
And a management server for receiving the first recognition number, the second recognition number, and the third recognition number. 7. The information processing apparatus according to claim 6,
And compares any one of the first recognition number and the second recognition number with the third recognition number with each other. 8. The system according to claim 7,
And compares the second recognition number with the third recognition number when the first recognition number and the third recognition number do not match. 8. The system according to claim 7,
Selects one of the first recognition number and the second recognition number as the vehicle number of the vehicle according to the comparison result and calculates a difference between the current time and the one of the generation times based on the vehicle number of the vehicle And calculating a parking fee for the vehicle using the calculation result.

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