WO2017169012A1

WO2017169012A1 - Identification information determination device, identification information determination system, computer program, and identification information determination method

Info

Publication number: WO2017169012A1
Application number: PCT/JP2017/002303
Authority: WO
Inventors: 英典山本; 武彦加藤; 政勝東久保; 義輝是枝
Original assignee: 住友電気工業株式会社
Priority date: 2016-03-30
Filing date: 2017-01-24
Publication date: 2017-10-05
Also published as: JP6369494B2; JP2017182478A

Abstract

This identification information determination device determines whether or not identification information of a vehicle is fraudulent, said identification information determination device being provided with: an acquisition unit that acquires identification information of a vehicle passing through a plurality of sites, and acquires the time of the passing in relation to said identification information; a calculation unit that calculates traveling duration between sites on the basis of the identification information and the time of the passing in relation to said identification information acquired by the acquisition unit; and a determination unit that determines the identification information to be fraudulent in the case when the traveling duration calculated by the calculation unit is equal to or shorter than a prescribed threshold duration for the interval between said sites.

Description

Identification information determination apparatus, identification information determination system, computer program, and identification information determination method

The present invention relates to an identification information determination device, an identification information determination system, a computer program, and an identification information determination method.
This application claims priority based on Japanese Patent Application No. 2016-069107 filed on Mar. 30, 2016, and incorporates all the description content described in the above Japanese application.

不正 There are unauthorized vehicles that illegally use vehicle identification information such as license plates. Therefore, an information processing device is disclosed in which the front and rear license plates of the same vehicle are photographed by two cameras and the vehicle is determined to be an unauthorized vehicle when the front and rear license plates do not match (see Patent Document 1). .

JP 2014-130435 A

The identification information determination apparatus according to the present disclosure is an identification information determination apparatus that determines whether or not the vehicle identification information is illegal. The identification information of the vehicle passing through a plurality of points and the passing time point related to the identification information are determined. An acquisition unit to be acquired, a calculation unit that calculates travel time between points based on the identification information acquired by the acquisition unit and a passage time point related to the identification information, and a travel time calculated by the calculation unit And a determination unit that determines that the identification information is invalid when it is equal to or shorter than a predetermined threshold time.

The identification information determination system of the present disclosure is installed at each of a plurality of points, and includes a plurality of road devices that detect the identification information of vehicles passing through each point and the passing time points related to the identification information, and the plurality of road devices from the above And an identification information determination device according to any one of the present embodiments, which acquires identification information of a vehicle passing through a plurality of points and a passage time point related to the identification information.

A computer program according to the present disclosure is a computer program for causing a computer to determine whether or not vehicle identification information is illegal. The computer program includes the identification information of a vehicle passing through a plurality of points and the identification information. An acquisition unit that acquires the passage time, a calculation unit that calculates travel time between points based on the acquired identification information and the passage time according to the identification information, and a predetermined threshold value between the points If it is less than or equal to the time, it is made to function as a determination unit that determines that the identification information is invalid.

The identification information determination method according to the present disclosure is an identification information determination method for determining whether or not the vehicle identification information is illegal. The identification information of the vehicle passing through a plurality of points and the passing time point related to the identification information are determined. The obtaining unit obtains the travel time between the points based on the acquired identification information and the passage time related to the obtained identification information, and the calculated travel time is equal to or less than a predetermined threshold time between the points. If it is, the determination unit determines that the identification information is invalid.

It is a block diagram which shows an example of a structure of the identification information determination system of this Embodiment. It is a schematic diagram which shows an example of a structure of plate information DB of this Embodiment. It is a schematic diagram which shows an example of a structure of counterfeit plate information DB of this Embodiment. It is a schematic diagram which shows an example of a structure of the forgery plate determination travel time DB between points of this Embodiment. It is explanatory drawing which shows an example of the plate recognition information which the identification information determination apparatus of this Embodiment acquires. It is a schematic diagram which shows an example of the movement state of the vehicle in the case of detecting counterfeit plate information. It is a schematic diagram which shows an example of the search method of the plate information by the identification information determination apparatus of this Embodiment. It is a flowchart which shows an example of the process sequence of the identification information determination apparatus of this Embodiment. It is a flowchart which shows an example of the process sequence of the identification information determination apparatus of this Embodiment.

[Problems to be solved by the present disclosure]
In recent years, in the field of traffic monitoring and the like, a technique for reading a license plate of a vehicle has been developed as one technique for extracting a specific vehicle. Such a technology for reading a license plate can be used for a toll collection system on a highway, a traffic flow measurement system, an entrance / exit vehicle management system such as a parking lot, and a vehicle control system such as a speed violation.

However, the device of Patent Document 1 cannot detect an unauthorized vehicle having the same number plate before and after the same vehicle. In addition, it is necessary to install two cameras at a point where an unauthorized vehicle is detected. When the number of target points increases, it is necessary to install a large number of cameras, which increases the cost of the system.

Therefore, an identification information determination apparatus capable of accurately determining whether or not the vehicle identification information is illegal, an identification information determination system including the identification information determination apparatus, and a computer program for realizing the identification information determination apparatus It is another object of the present invention to provide an identification information determination method.

[Effects of the present disclosure]
According to the present disclosure, it is possible to accurately determine whether or not the vehicle identification information corresponds to unauthorized information.

[Description of Embodiment of Present Invention]
The identification information determination apparatus according to the present embodiment is an identification information determination apparatus that determines whether or not the vehicle identification information is illegal, and relates to the identification information of a vehicle passing through a plurality of points and the identification information. An acquisition unit that acquires a passage time point, a calculation unit that calculates travel time between points based on the identification information acquired by the acquisition unit and the passage time point related to the identification information, and the travel time calculated by the calculation unit And a determination unit that determines that the identification information is invalid when the time is equal to or shorter than a predetermined threshold time between the points.

The identification information determination system according to the present embodiment is installed at each of a plurality of points, and includes a plurality of on-road devices that detect the identification information of vehicles passing through the respective points and the passing time points related to the identification information, and the plurality of on-roads And an identification information determination device according to any one of the present embodiments for acquiring identification information of a vehicle passing through the plurality of points from the device and a passing time point related to the identification information.

The computer program according to the present embodiment is a computer program for causing a computer to determine whether or not the vehicle identification information is illegal. The computer program includes the identification information of the vehicle passing through a plurality of points, and the computer program. An acquisition unit that acquires a passage time according to the identification information, a calculation unit that calculates travel time between points based on the acquired identification information and the passage time according to the identification information, and the calculated travel time between the points When it is equal to or shorter than a predetermined threshold time, it functions as a determination unit that determines that the identification information is invalid.

The identification information determination method according to the present embodiment is an identification information determination method for determining whether or not the vehicle identification information is illegal, and relates to the identification information of a vehicle passing through a plurality of points and the identification information. The acquisition unit acquires the passage time, the calculation unit calculates the travel time between points based on the acquired identification information and the passage time related to the identification information, and the calculated travel time is a predetermined distance between the points. When the time is equal to or shorter than the threshold time, the determination unit determines that the identification information is invalid.

The acquisition unit acquires the identification information of the vehicle passing through a plurality of points and the passing time point related to the identification information. For example, a road device (for example, a license plate reader) is installed at a plurality of points on the road, and the road device detects the vehicle identification information and the vehicle passage time. The acquisition unit can acquire the identification information and the passage time from each road device by wireless communication or wired communication. The identification information is, for example, information related to a vehicle license plate, but is not limited thereto.

The calculation unit calculates the travel time between points based on the acquired identification information and the passing time point related to the identification information. For example, when the identification information “1234” and the passage time t1 are obtained from the road device at the point A, and the identification information “1234” and the passage time t2 are obtained from the road device at the point B, the calculation unit Travel time Tab is calculated by the equation Tab = t2-t1 (however, the passage time t1 is a time point before the passage time t2).

The determination unit determines that the identification information is invalid when the travel time calculated by the calculation unit is equal to or less than a predetermined threshold time between the points. For example, assuming that a predetermined threshold time between points AB is Tth, if Tab ≦ Tth, it is determined that the identification information “1234” is invalid. Here, the threshold time Tth is shorter than the movable time when the vehicle moves between the points AB, and the vehicle can hardly move between the points AB within the threshold time Tth. Time.

With the above-described configuration, when the identification information “1234” is detected at each of the points A and B within the time when the same vehicle cannot move between the points AB, the same identification information “1234” is attached 2 Since it is considered that one of the two vehicles has passed the point A and the other has passed the point B, it can be determined that the identification information “1234” is used illegally, so the vehicle identification information is illegal. It can be accurately determined whether or not.

The identification information determination apparatus according to the present embodiment includes an output unit that outputs illegal identification information corresponding to fraud when the determination unit determines that the identification information is illegal.

When the determination unit determines that the identification information is illegal, the output unit outputs the illegal identification information corresponding to the illegality. For example, it can be output that the identification information “1234” is illegal. The output may be, for example, audio output, may be displayed in characters, or may be notified to a portable terminal device carried by a forgery plate investigator. With the above-described configuration, when illegally used identification information is detected, the unauthorized identification information can be immediately grasped.

The identification information determination device according to the present embodiment is equivalent to the fraud identification information when the legitimate identification information of the vehicle and the image of the vehicle are associated and stored and the fraud identification information is output by the output unit. A display unit that displays an image of the vehicle related to the regular identification information.

The storage unit stores the regular identification information of the vehicle and the image of the vehicle in association with each other. The regular identification information is regular vehicle identification information. A display part displays the image of the vehicle which concerns on regular identification information equivalent to the said fraud identification information, when fraud identification information is output by an output part. For example, when the identification information “1234” is output as fraudulent identification information, an image of a vehicle (regular vehicle) having the identification information “1234” as the regular identification information is displayed. With the above-described configuration, it is possible to clarify the difference between an unauthorized vehicle that illegally uses identification information and a regular vehicle.

The identification information determination apparatus according to the present embodiment includes an unauthorized information storage unit that stores unauthorized identification information corresponding to an illegality when the determination unit determines that the identification information is unauthorized.

The fraudulent information storage unit stores fraud identification information corresponding to fraud when the determination unit determines that the identification information is illegal. Thereby, since fraud identification information is memorize | stored whenever fraud identification information is detected, fraud identification information can be accumulate | stored.

In the identification information determination device according to the present embodiment, the identification information includes character information included in a vehicle license plate.

The identification information includes character information included in the license plate of the vehicle. The character information is, for example, a region identification code such as Osaka or Naniwa in Japan, a vehicle type code representing a normal car or a small car, a use code representing private use or business use, a vehicle identification number, and the like. Moreover, in countries other than Japan, it can be set as the character information defined in the country concerned. Thereby, for example, when the same license plate as a popular license plate is used illegally, it can be determined that it is illegal.

In the identification information determination device according to the present embodiment, the identification information is unique information related to an in-vehicle device mounted on a vehicle.

The identification information is unique information related to the in-vehicle device mounted on the vehicle. Specific information related to the in-vehicle device is, for example, specific information of a card used in a vehicle such as an ETC (Electronic Toll Collection System) card, a device address of Bluetooth (registered trademark), an ID of the in-vehicle device transmitted to an optical beacon, or the like. . Thereby, when the specific information which concerns on a vehicle equipment is used illegally, it can determine with being unauthorized.

In the identification information determination apparatus according to the present embodiment, the threshold time is a time based on a distance between points and a predetermined speed between the points.

The threshold time is a time based on the distance between points and a predetermined speed between the points. The threshold time is also referred to as counterfeit plate determination travel time. For example, when the distance between the points AB is L and the legal speed between the points AB is V, the predetermined speed may be legal speed × setting coefficient. Here, the setting coefficient can be 2, but is not limited to 2. In this case, the threshold time Tth is Tth = L / (2 × V). When the setting coefficient is 2, it is considered that there is no vehicle that can move between the points AB at twice the legal speed, and therefore the vehicle that moves between the points A and B within the travel time equal to or less than the threshold time Tth. Is detected, it can be easily determined that the vehicle passing through the point A and the vehicle passing through the point B are different vehicles.

In the identification information determination apparatus according to the present embodiment, the threshold time is a time obtained by statistically processing the travel time between points of a plurality of vehicles that have passed between points.

The threshold time is a time obtained by statistically processing the travel time between the points of each of the plurality of vehicles that have passed between the points. For example, the travel times of a plurality of vehicles that have passed between target points are collected. First, the first travel time is extracted from the collected travel time, and a range of one first group is set with a predetermined upper limit value and lower limit value around the extracted travel time value. Next, when the second travel time belongs to the range of the first group, the number of data of the first group is increased by 1, and when the second travel time does not belong to the range of the first group, A range of one second group is set with a predetermined upper limit value and lower limit value around the second travel time value. Hereinafter, the same processing is repeated, and the arithmetic average value or the minimum value of the travel times included in the group having the largest number of data can be set as the threshold time between the target points.

With the above-described configuration, it is considered that the possibility of moving between points in a time shorter than the actual travel time is extremely low. For example, a vehicle moving between points A and B in a travel time equal to or less than the threshold time Tth When it is detected, it can be easily determined that the vehicle passing through the point A and the vehicle passing through the point B are different vehicles.

The identification information determination apparatus according to the present embodiment is configured to determine, when the number of times that the determination unit determines that the identification information is invalid during a predetermined time with respect to arbitrary identification information is equal to or less than a predetermined value, The invalid part which invalidates the determination result of a part is provided.

The invalid part invalidates the determination result of the determination unit when the number of times that the determination unit determines that the identification information is invalid during a predetermined time with respect to arbitrary identification information is equal to or less than a predetermined value. The predetermined time can be, for example, one day. The predetermined value may be a numerical value of 2 or more, and may be 2, 3, 5, or the like, for example.

For example, in a target area where a plurality of road devices are installed, if the number of times the identification information “1234” is determined to be invalid within a day is equal to or less than a predetermined value, the determination result is invalidated and the identification information “ 1234 "is not determined to be illegal. With the above-described configuration, it is possible to prevent erroneous determination when the travel time between points is accidentally shortened due to an identification information detection error on the road device, a communication error between the road device and the identification information determination device, or the like. Can do.

[Details of the embodiment of the present invention]
Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments. FIG. 1 is a block diagram showing an example of the configuration of the identification information determination system of the present embodiment. As shown in FIG. 1, the identification information determination system includes an identification information determination device 100, a plurality of road devices 200, and the like. The road device 200 is installed at a target point in the target area (for example, a required point on a general road, an expressway, a parking lot, or the like), and wireless communication or communication between the road device 200 and the identification information determination device 100 is performed. It is connected by a communication line 1 such as wired communication. The road device 200 is installed at points A, B, C, D. For simplicity, FIG. 1 shows four road devices 200, but the number is not limited to this.

The road device 200 is, for example, a license plate reader. The road device 200 includes an imaging unit such as a camera, an image processing unit, and the like, and an image of a vehicle (vehicle image) passing through a point (points A, B, C, D, etc.) and a license plate image (number plate image). ), The plate information of the license plate, the recognition reliability of the plate information, the passing time when the vehicle passes the point, and the like. The road device 200 transmits the detected data to the identification information determination device 100 as plate recognition information.

The identification information determination apparatus 100 includes a control unit 10, a communication unit 11, a calculation unit 12, a determination unit 13, a storage unit 14, an output unit 15, a display unit 16, an invalid unit 17, and the like that control the entire apparatus.

The communication unit 11 has a function as an acquisition unit. The communication unit 11 acquires, from each road device 200, plate information as identification information of a vehicle passing through a plurality of points and a passage time point related to the plate information. The communication unit 11 can acquire the plate information and the passage time from each on-road device 200 through the communication line 1 by wireless communication or wired communication. Hereinafter, in the present embodiment, vehicle plate information (information relating to a license plate) is described as an example of identification information, but the identification information is not limited to plate information.

The calculation unit 12 calculates the travel time between points based on the plate information acquired by the communication unit 11 and the passage time related to the plate information. For example, it is assumed that the plate information “1234” and the passage time t1 are acquired from the road device 200 at the point A, and the plate information “1234” and the passage time t2 are acquired from the road device 200 at the point B. That is, assume that equivalent plate information is detected at points A and B. The calculation unit 12 calculates the travel time Tab between the points AB using the formula Tab = t2-t1 (however, the passage time t1 is a time point before the passage time t2).

Note that the equivalent plate information is the case where the plate information is the same and the case where the plate information can be regarded as the same as long as the recognition reliability of the plate information is larger than a required threshold (for example, 80% reliability). Including. That is, in the present embodiment, “the plate information is the same” includes the case where the plate information can be regarded as the same. Further, the recognition reliability can be used as an index indicating, for example, how accurate the pattern matching is in image processing for reading a license plate.

The determination unit 13 determines that the plate information is incorrect when the travel time calculated by the calculation unit 12 is equal to or shorter than a predetermined threshold time between the points (also referred to as counterfeit plate determination travel time). For example, assuming that the counterfeit plate determination travel time between the points AB is Tth, if Tab ≦ Tth, the plate information “1234” is determined to be invalid. Here, the counterfeit plate determination travel time Tth is a time shorter than the movable time when the vehicle moves between the points AB, and the vehicle finally passes between the points AB within the counterfeit plate determination travel time Tth. It can be a time when it cannot move.

With the above configuration, when the plate information “1234” is detected at each of the points A and B within the time when the same vehicle cannot move between the points AB, the same plate information “1234” is attached 2 Since it is considered that one of the vehicles has passed the point A and the other has passed the point B, it can be determined that the plate information “1234” is used illegally, so the vehicle identification information is incorrect. It can be accurately determined whether or not. Further, unauthorized use of the vehicle ID (particularly the license plate) can be prevented.

The storage unit 14 stores a plate information DB, a counterfeit plate information DB, a point-to-point counterfeit plate determination travel time DB, and the like.

FIG. 2 is a schematic diagram showing an example of the configuration of the plate information DB of the present embodiment. As shown in FIG. 2, the plate information DB includes a detection point ID (for example, A, B, C, D...) Where the road device 200 is installed, a detection time that is a vehicle passage time, vehicle plate information, It includes plate information recognition reliability, a plate image that is an image of a license plate of a vehicle, a vehicle image obtained by capturing the whole or a part of the vehicle, and the like.

Also, the plate information includes character information included in the vehicle license plate. In Japan, plate information includes, for example, Osaka, Naniwa, etc., regional identification codes, vehicle type codes representing ordinary cars or small cars, application codes representing private use or business use, vehicle identification numbers, plates indicating large, medium and small Includes plate color (including character color), body color (including multiple colors), etc. indicating size, private use or business use. In addition, it can be handled in the same way as in Japan in countries other than Japan. Thereby, for example, when the same license plate as a popular license plate is used illegally, it can be determined that it is illegal.

FIG. 3 is a schematic diagram showing an example of the configuration of the counterfeit plate information DB according to the present embodiment. As shown in FIG. 3, the counterfeit plate information DB is plate information (counterfeit plate information) that is determined (detected) to be illegal, the latest detection time that is finally determined to be illegal, and is initially incorrect. Determined earliest detection time, number of detection times determined to be illegal, registration type (whether automatically registered in counterfeit plate information DB or manually registered), vehicle of regular plate vehicle Includes images, body color of regular plate vehicles, etc. A regular plate vehicle is a vehicle with a regular number plate. The counterfeit plate information DB stores plate information that is determined to be illegal by the determination unit 13 based on travel time. The plate information determined to be illegal includes actually forged plate information. However, since a vehicle with an actually forged plate travels may determine that the travel time of a regular plate vehicle with regular plate information is below a predetermined threshold time, it is illegal. The plate information determined to include normal plate information. However, the actual counterfeit plate information can be determined from the plate information determined to be illegal by the operator confirming the vehicle image or the like.

FIG. 4 is a schematic diagram showing an example of the configuration of the spot-forgery plate determination travel time DB according to the present embodiment. In FIG. 4, the points A, B, C, and D are illustrated for convenience, but the points are not limited to four. The inter-point counterfeit plate determination travel time DB is set with a predetermined threshold time between points from the source point to the destination point. The counterfeit plate determination travel time between points is a time during which it is considered that there is no vehicle that can move between the points with the counterfeit plate determination travel time or that the possibility of movement is extremely low.

For example, in the example of FIG. 4, the forged plate determination travel time when moving from point A to point B is set to 30 minutes. Further, the forgery plate determination travel time when moving from point B to point A is set to 25 minutes. The reason why the travel time for judging counterfeit plates differs between the two is because the traffic conditions of the road and the like are taken into consideration. In addition, the numerical value shown in FIG. 4 is an example, and is not limited to these numerical values.

Next, a method for calculating the counterfeit plate travel time will be described. As a first example, a case where legal speed is used will be described.

The counterfeit plate determination travel time can be calculated based on the distance between points and a predetermined speed between the points. For example, when the distance between the points AB is L and the legal speed between the points AB is V, the predetermined speed may be legal speed × setting coefficient. Here, the setting coefficient can be 2, but is not limited to 2. In this case, the forged plate determination travel time Tth is Tth = L / (2 × V). When the setting coefficient is 2, it is considered that there is no vehicle that can move between the points AB at twice the legal speed. Therefore, the points A and B are set at the travel time equal to or less than the counterfeit plate determination travel time Tth. When a moving vehicle is detected, it can be easily determined that the vehicle passing through the point A and the vehicle passing through the point B are different vehicles. Further, since it is sufficient to use a specific value by using the legal speed, the forged plate determination travel time can be easily set, and a complicated system becomes unnecessary.

More specifically, when the route between two points is composed of a road having a legal speed of 40 km / h and a distance of 20 km, the forged plate determination travel time between the two points is 20 km / (2 × 40 km / h ) And is 15 minutes. In this case, when the same plate information is detected between the two points within 15 minutes or less, the license plate related to the plate information can be determined to be a counterfeit plate.

Further, when the route between two points is composed of a road R1 having a legal speed of 40 km / h and a distance of 20 km and a road R2 having a legal speed of 50 km / h and a distance of 30 km, the forged plate determination of the road R1 The travel time is calculated by 20 km / (2 × 40 km / h) and is 15 minutes. Moreover, the forged plate determination travel time of the road R2 is calculated by 30 km / (2 × 50 km / h), and is 18 minutes. Therefore, the forged plate determination travel time between the two points is 33 minutes (= 15 + 18). In this case, when the same plate information is detected between the two points within 33 minutes or less, the license plate related to the plate information can be determined to be a counterfeit plate.

When there are a plurality of routes from point A to point B (for example, route Rt1, route Rt2), the shortest of the forged plate determination travel time of route Rt1 and the forged plate determination travel time of route Rt2 The counterfeit plate determination travel time can be the counterfeit plate determination travel time from point A to point B. As a result, whether or not the counterfeit plate is present can be determined regardless of which of the plurality of routes the vehicle moves.

Next, the case where the actual travel time is used will be described as a second example. The counterfeit plate determination travel time can be calculated by statistically processing the travel time between the points of each of the plurality of vehicles that have passed between the points. For example, the travel times of a plurality of vehicles that have passed between target points are collected. First, the first travel time is extracted from the collected travel time, and a range of one first group is set with a predetermined upper limit value and lower limit value around the extracted travel time value. Next, when the second travel time belongs to the range of the first group, the number of data of the first group is increased by 1, and when the second travel time does not belong to the range of the first group, A range of one second group is set with a predetermined upper limit value and lower limit value around the second travel time value. Hereinafter, the same processing is repeated, and the arithmetic average value or the minimum value of the travel time included in the group having the largest number of data can be set as the forged plate determination travel time between the target points. Further, by using the actual travel time, it is possible to reflect actual traffic information, and it is possible to make an accurate determination as compared with the case where the legal speed is used.

With the above-described configuration, it is considered that the possibility of moving between points in a time shorter than the actual travel time is extremely low. For example, the points A and B are moved in a travel time equal to or shorter than the counterfeit plate determination travel time Tth. When the vehicle to be detected is detected, it can be easily determined that the vehicle that has passed the point A and the vehicle that has passed the point B are different vehicles.

As described above, the first example and the second example have been described regarding the method for calculating the counterfeit plate determination travel time, but the first example and the second example may be used in combination. For example, when the number of passing vehicles is extremely small (for example, 100 cars or less in 15 minutes) in the midnight hours, etc., the reliability of the actual travel time is reduced, the legal speed may be used. .

When the determination unit 13 determines that the plate information is illegal, the output unit 15 outputs counterfeit plate information (unauthorized identification information) corresponding to the illegal operation. For example, it can be output that the plate information “1234” is illegal. The output may be, for example, audio output, may be displayed in characters, or may be notified to a portable terminal device carried by a forgery plate investigator. In addition, when outputting counterfeit plate information, the vehicle image of the unauthorized vehicle which concerns on counterfeit plate information can be displayed. With the above-described configuration, when illegally used plate information is detected, the counterfeit plate information can be immediately grasped.

Further, when the determination unit 13 determines that the plate information is illegal, the counterfeit plate information (incorrect identification information) corresponding to the illegality is stored (registered) in the counterfeit plate information DB. That is, the storage unit 14 has a function as an unauthorized information storage unit. With the above-described configuration, each time counterfeit plate information is detected, counterfeit plate information is stored in the counterfeit plate information DB, so that counterfeit plate information can be stored. The counterfeit plate information stored in the counterfeit plate information DB can be updated. For example, since an unauthorized vehicle may be changed to a regular vehicle, even if it is determined that the plate is counterfeit plate information, it can be updated to regular plate information in the future. Also, false counterfeit plate information can be corrected.

Further, the storage unit 14 stores the regular plate information of the regular plate vehicle and the image of the regular plate vehicle in association with each other. The regular plate vehicle is a vehicle with a regular number plate, and the regular plate information is plate information of a regular plate vehicle.

When the output unit 15 outputs the counterfeit plate information (it can also display a vehicle image of an unauthorized vehicle related to the counterfeit plate information), the display unit 16 is a normal plate vehicle related to the normal plate information equivalent to the counterfeit plate information. The image of is displayed. For example, when plate information “1234” is output as counterfeit plate information, an image of a regular plate vehicle having plate information “1234” as regular plate information is displayed. With the above-described configuration, it is possible to clarify the difference between an unauthorized vehicle that illegally uses plate information and a regular vehicle.

The invalidation unit 17 invalidates the determination result of the determination unit 13 when the number of times that the determination unit 13 determines that the plate information is invalid during a predetermined time with respect to arbitrary plate information is equal to or less than a predetermined value. . The predetermined time can be, for example, one day. The predetermined value may be a numerical value of 2 or more, and may be 2, 3, 5, or the like, for example.

For example, when the number of times that the plate information “1234” is determined to be counterfeit plate information within one day is less than or equal to a predetermined value within a target area where a plurality of road devices 200 are installed, the determination result of the determination unit 13 is displayed. It is invalidated and it is not determined that the plate information “1234” is invalid. With the above-described configuration, erroneous determination when the travel time between points is erroneously shortened due to a plate information detection error in the road device 200, a communication error between the road device 200 and the identification information determination device 100, or the like. Can be prevented.

Next, the operation of the identification information determination apparatus 100 according to this embodiment will be described. FIG. 5 is an explanatory diagram showing an example of plate recognition information acquired by the identification information determination apparatus 100 of the present embodiment. The acquired plate recognition information acquired from the plurality of road devices 200 is stored in the plate information DB. However, in the example of FIG. 5, for the sake of simplicity, the point ID, the detection time, and the vehicle identification number of the plate information are obtained from the plate information DB. Is an excerpt. For the sake of simplicity, the value of “second” is omitted from the detection time. As shown in FIG. 5, the plate information detected at each point is stored in the plate information DB over time.

Each time plate information is detected, the plate information DB is searched for equivalent plate information that has not been detected in the past. In the example of FIG. 5, the plate information “1234” is detected at the point B at the detection time 10:40 (current). By searching the plate information DB, it can be seen that the same plate information “1234” was detected at the point A at the detection time 10:30.

In this case, the calculation unit 12 calculates the travel time between the points AB (movement from the point A to the point B) as 10 minutes. On the other hand, referring to the inter-point counterfeit plate determination travel time DB in FIG. 4, the counterfeit plate determination travel time between the points AB (movement from the point A to the point B) can be specified as 30 minutes.

Since the determination unit 13 calculates the travel time between the points AB (10 minutes) calculated by the calculation unit 12 to be equal to or less than the counterfeit plate determination travel time (30 minutes) between the points AB, the plate information “1234” is a counterfeit plate. Is determined.

FIG. 6 is a schematic diagram showing an example of a moving state of the vehicle when detecting counterfeit plate information. As shown in FIG. 6, it is assumed that intersections S1 and S2 exist on the road, and a road device 200 is installed at each of points A, B, and C. It is assumed that the vehicle 50 with the plate information “1234” passes through the point A at 10:30 and turns right at the intersection S1. On the other hand, it is assumed that the vehicle 51 with the plate information “1234” turns left at the intersection S1, passes through the point B at 10:40, and goes straight through the intersection S2. In this case, the identification information determination apparatus 100 acquires the same information as in the case illustrated in FIG. 5 for the plate information “1234”. That is, the plate information “1234” is detected at the point B at the detection time 10:40 (current), and the same plate information “1234” is detected at the point A at the detection time 10:30. The counterfeit plate determination travel time between points AB is 30 minutes, and the travel time between points AB (10 minutes) is equal to or shorter than the counterfeit plate determination travel time (30 minutes) between points AB. "Is determined to be a counterfeit plate.

FIG. 7 is a schematic diagram showing an example of a plate information search method by the identification information determination apparatus 100 of the present embodiment. For the sake of simplicity, it is assumed that the points are points A, B, C, and D, and the forgery plate determination travel time DB between points is as shown in FIG. In the example of FIG. 7, the plate information “1234” is detected at the point B at the detection time 10:40 (current).

In this case, the control unit 10 specifies the maximum time of the forged plate determination travel time between the point B where the plate information “1234” is detected and other points (A, C, D). In the example of FIG. 4, the counterfeit plate determination travel time between points AB (movement from point A to point B) is 30 minutes, and the counterfeit plate determination travel time between points CB (movement from point C to point B). Is 40 minutes, and the counterfeit plate determination travel time between the point DBs (movement from the point D to the point B) is 35 minutes, so the maximum time is 40 minutes for the counterfeit plate determination travel time between the points CB. Therefore, the control unit 10 searches the plate information DB for the same plate information as the plate information “1234” detected at the point B at the detection time 10:40 (current) within the range of the specified maximum time.

If the same plate information is found at a plurality of detection times when searching the plate information DB, the travel time is calculated using the latest detection time. For example, when searching for the same plate information as the plate information “1234” detected at the point B at the detection time 10:40 (current), the plate information “1234” is detected at the time 10:30 and the time 10:15. If so, the travel time is calculated using the detection time 10:30. This is because the detection time 10:15 detected immediately before is already used for calculating the travel time when the plate information “1234” is detected at time 10:30.

8 and 9 are flowcharts showing an example of a processing procedure of the identification information determination apparatus 100 according to the present embodiment. In the following, for the sake of simplicity, the subject of processing will be described as the control unit 10. The control unit 10 acquires plate recognition information from the road device 200 (S11), and determines whether or not the recognition reliability is greater than a threshold (for example, 80%) (S12). The recognition reliability is an index representing the accuracy of the detected plate information. For example, when it is greater than 80%, it can be determined that the plate information has been correctly recognized (detected).

If the recognition reliability is not greater than the threshold (NO in S12), the control unit 10 continues the process of step S11. When the recognition reliability is larger than the threshold (YES in S12), the control unit 10 collates the newly acquired plate information with the counterfeit plate information DB (S13), and the same plate information as the newly acquired plate information is the counterfeit plate. It is determined whether it is in the information DB (S14).

If the same plate information as the acquired plate information is not present in the counterfeit plate information DB (NO in S14), the control unit 10 determines the maximum counterfeit plate determination travel time between the point where the plate information is newly acquired and another point. Time is specified (S15). The control unit 10 searches the plate information DB for the same plate information as the newly acquired plate information within the specified maximum time (S16).

The control unit 10 determines whether or not there is the same plate information (S17). If there is the same plate information (YES in S17), the acquisition point where the plate information is newly acquired, the detection point of the same plate information, The forgery plate determination travel time is specified (S18). The control unit 10 calculates a travel time between the acquisition point where the plate information is newly acquired and the detection point where the same plate information is detected (S19).

The control unit 10 determines whether or not the calculated travel time is equal to or less than the specified counterfeit plate determination travel time (S20), and when the calculated travel time is equal to or less than the specified counterfeit plate determination travel time (S20). YES), the newly acquired plate information is stored (registered) in the counterfeit plate information DB (S21), and the counterfeit plate information is output (S22).

The control unit 10 stores the newly acquired plate information in the plate information DB (S23), and determines whether or not to end the process (S24). If the process is not terminated (NO in S24), the control unit 10 continues the process from step S11. If the process is terminated (YES in S24), the process is terminated.

When the same plate information as the acquired plate information is present in the counterfeit plate information DB (YES in S14), the control unit 10 performs the processing after step S22. When there is no same plate information (NO in S17), or when the calculated travel time is not less than or equal to the specified forged plate determination travel time (NO in S20), the control unit 10 performs the processing after step S23.

The identification information determination apparatus 100 according to the present embodiment can be realized using a general-purpose computer including a CPU (processor), a RAM, and the like. That is, as shown in FIG. 8 and FIG. 9, a computer program that defines the procedure of each process is loaded into a RAM provided in the computer, and the computer program is executed by a CPU (processor), whereby identification information on the computer. The determination apparatus 100 can be realized.

In the above-described embodiment, the plate information is described as an example of the identification information, but the identification information is not limited to the plate information. For example, the identification information can be unique information related to an in-vehicle device mounted on the vehicle. Specific information related to the in-vehicle device is, for example, specific information of a card used in a vehicle such as an ETC (Electronic Toll Collection System) card, a device address of Bluetooth (registered trademark), an ID of the in-vehicle device transmitted to an optical beacon, or the like. . Thereby, when the specific information which concerns on a vehicle equipment is used illegally, it can determine with being unauthorized.

In the above-described embodiment, the legal speed or the actual travel time used for calculating the counterfeit plate determination travel time may be substituted with the speed or travel time calculated by statistically processing information obtained from the vehicle detector. it can.

In the above-described embodiment, the configurations of the plate information DB and the counterfeit plate information DB are examples, and are not limited to those illustrated. For example, the plate information DB may include the detected lane number, vehicle speed, and plate information recognition success / failure information, or the plate size, application code, vehicle body color, and the like may be omitted.

In the above-described embodiment, when the counterfeit plate information is output, the latest detection time, the oldest detection time, the number of detections, etc. of the counterfeit plate information can be displayed.

According to the present embodiment, forged plate information equivalent to regular plate information can be accurately determined and detected. Further, even when the license plates are different between before and after the vehicle, it is possible to accurately determine and detect counterfeit plate information equivalent to the regular plate information regardless of the front and rear of the vehicle. Moreover, if it is plate information equivalent to regular plate information, it can be determined that it is a counterfeit license plate.

In this embodiment, since only one on-road device 200 may be installed at each point, the cost of the entire system can be suppressed compared to a case where a plurality of cameras are installed at one point. Can do.

The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Control part 11 Communication part 12 Calculation part 13 Determination part 14 Storage part 15 Output part 16 Display part 17 Invalid part 100 Identification information determination apparatus 200 Roadside apparatus

Claims

An identification information determination device that determines whether vehicle identification information is illegal,
An acquisition unit for acquiring identification information of a vehicle passing through a plurality of points and a passing time point related to the identification information;
A calculation unit that calculates travel time between points based on the identification information acquired by the acquisition unit and the passage time related to the identification information;
An identification information determination apparatus comprising: a determination unit that determines that the identification information is invalid when the travel time calculated by the calculation unit is equal to or less than a predetermined threshold time between the points.
The identification information determination apparatus according to claim 1, further comprising an output unit that outputs illegal identification information corresponding to fraud when the determination unit determines that the identification information is illegal.
A storage unit for storing the vehicle regular identification information and the vehicle image in association with each other;
The identification information determination apparatus according to claim 2, further comprising: a display unit that displays an image of the vehicle related to regular identification information equivalent to the fraud identification information when the fraud identification information is output by the output unit.
The identification information determination according to any one of claims 1 to 3, further comprising: an unauthorized information storage unit that stores unauthorized identification information corresponding to fraud when the determination unit determines that the identification information is unauthorized. apparatus.
The identification information is
The identification information determination apparatus according to any one of claims 1 to 4, comprising character information included in a license plate of a vehicle.
The identification information is
The identification information determination apparatus according to any one of claims 1 to 4, wherein the identification information determination apparatus is unique information relating to an in-vehicle device mounted on a vehicle.
The threshold time is
The identification information determination apparatus according to any one of claims 1 to 6, which is a time based on a distance between points and a predetermined speed between the points.
The threshold time is
The identification information determination apparatus according to any one of claims 1 to 6, which is a time obtained by statistically processing a travel time between the points of a plurality of vehicles that have passed between the points.
When any number of times that the determination unit determines that the identification information is invalid during a predetermined time with respect to arbitrary identification information is equal to or less than a predetermined value, an invalid unit that invalidates the determination result of the determination unit is provided. The identification information determination apparatus according to any one of claims 1 to 8.
Identification of vehicles that are installed at each of a plurality of points and that pass through each of the points, and a plurality of road devices that detect the time of passage according to the identification information, and identification of vehicles that pass through the plurality of points from the plurality of road devices An identification information determination system comprising the identification information determination device according to any one of claims 1 to 9, which acquires information and a passage time point related to the identification information.
A computer program for causing a computer to determine whether vehicle identification information is illegal,
Computer
An acquisition unit for acquiring identification information of a vehicle passing through a plurality of points and a passing time point related to the identification information;
A calculation unit that calculates travel time between points based on the acquired identification information and the passage time according to the identification information;
A computer program that functions as a determination unit that determines that the identification information is invalid when the calculated travel time is equal to or less than a predetermined threshold time between the points.
An identification information determination method for determining whether vehicle identification information is illegal,
The acquisition unit acquires the identification information of the vehicle passing through a plurality of points and the passing time according to the identification information,
Based on the acquired identification information and the passage time related to the identification information, the calculation unit calculates the travel time between points,
An identification information determination method in which the determination unit determines that the identification information is invalid when the calculated travel time is equal to or less than a predetermined threshold time between the points.