WO2008010308A1 - Dispositif, procédé et programme d'acquisition d'informations sur des plaques d'immatriculation - Google Patents

Dispositif, procédé et programme d'acquisition d'informations sur des plaques d'immatriculation Download PDF

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Publication number
WO2008010308A1
WO2008010308A1 PCT/JP2006/326143 JP2006326143W WO2008010308A1 WO 2008010308 A1 WO2008010308 A1 WO 2008010308A1 JP 2006326143 W JP2006326143 W JP 2006326143W WO 2008010308 A1 WO2008010308 A1 WO 2008010308A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
license plate
information
plate information
point
Prior art date
Application number
PCT/JP2006/326143
Other languages
English (en)
Japanese (ja)
Inventor
Tamotsu Amamoto
Hiroaki Natori
Kunihiro Ikeda
Kouichi Kageyama
Shinji Hidaka
Masashi Murakumo
Nobumasa Sasaki
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to JP2008525782A priority Critical patent/JPWO2008010308A1/ja
Publication of WO2008010308A1 publication Critical patent/WO2008010308A1/fr

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
    • G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules

Definitions

  • License plate information acquisition apparatus License plate information acquisition method, and license plate information acquisition program
  • the present invention relates to a license plate information acquisition device, a license plate information acquisition method, and a license plate information acquisition program.
  • the license plate information of the front and rear parts of the traveling vehicle is imaged, and the license plate information read on the front and rear part of the license plate is read from the image, and the read front part is read.
  • a technology for associating the license plate information on the rear and rear of the same vehicle has been devised.
  • Patent Document 1 discloses a technique described below. That is, in Figure 19
  • the front license plate reader 1903 reads the front license plate information read by imaging the front license plate of the vehicle 1901.
  • the serial number “12-34” is stored in the front license plate information storage unit 1905 provided in the information processing apparatus 1904 in association with the time T1 when the front license plate information is read. Measures the vehicle speed V (m / sec) and the total vehicle length 1 (m).
  • the information processing apparatus 1904 uses the rear imaging point from V (mZsec), l (m), and a known distance L (m) from the front imaging point 1902 to the rear imaging point 1907. In 1907, find the expected time T2 when the vehicle will enter.
  • the rear license plate reader 1908 similarly captures the rear number plate of the vehicle 1901.
  • the read license plate information is stored in the rear license plate information storage unit 1909 of the information processing apparatus 1904 in association with the time T3 when the license plate information is read.
  • the information processing apparatus 1904 has the time T3 as the expected time T2.
  • the error ⁇ is adjusted within the range of time T2 people ⁇
  • the front license plate information read at time T1 and the rear license plate information read at time ⁇ 3 are handled as the same vehicle.
  • the post-corresponding license plate information storage unit 1910 that the user has is stored in association with the vehicle ID.
  • the information processing apparatus 1904 determines whether the vehicle is a violation vehicle by checking the associated front and rear license plate information, and warns on the spot or warns at a later date. Realized.
  • Patent Document 1 Japanese Patent Laid-Open No. 2003-228793
  • the above-described conventional technique has a problem in that the front license plate information and the rear license plate information cannot be associated with each other depending on the movement of the vehicle.
  • the rear imaging point arrives at the vehicle. Because the time deviates from the time within the range where the error was added to or subtracted from the expected time, the front license plate information and the rear license plate information could not be associated with consistency.
  • the present invention has been made to solve the above-described problems of the prior art, and the front and rear license plate information that does not depend on the movement of the vehicle is used for the same vehicle. It is an object of the present invention to provide a license plate information acquisition device, a license plate information acquisition method, and a license plate information acquisition program that can be consistently associated with each other. Means for solving the problem
  • the invention according to claim 1 acquires the front license plate information displayed on the front license plate of the vehicle passing through the front point,
  • a license plate information acquisition device that acquires rear license plate information displayed on a rear license plate of a vehicle passing through a rear point and associates the front license plate information with the rear license plate information.
  • the vehicle identification information for uniquely identifying the vehicle is detected until the detected vehicle passes through the rear point from the front point.
  • Vehicle tracking means for holding and tracking the vehicle, and the vehicle tracking means for the vehicle from which the front license plate information is acquired.
  • the front information holding means for acquiring the vehicle identification information and the vehicle number information obtained by associating and holding the acquired vehicle number information and the vehicle identification information in association with each other
  • the rear number plate Rear information holding for acquiring vehicle identification information given by the vehicle tracking means for a vehicle from which information is acquired, and holding the rear license plate information and vehicle identification information acquired in association with the vehicle force Is compared with the vehicle identification information held in the front information holding means and the rear information holding means, and the front license plate information and the rear number plate information to which the same vehicle identification information is assigned are associated with each other.
  • Front-rear association means for acquiring the vehicle identification information and the vehicle number information obtained by associating and holding the acquired vehicle number information and the vehicle identification information in association with each other
  • the rear number plate Rear information holding for acquiring vehicle identification information given by the vehicle tracking means for a vehicle from which information is acquired, and holding the rear license plate information and vehicle identification information acquired in association with the vehicle force Is compared with the vehicle identification information held in the front information holding means and the rear information holding means,
  • the vehicle tracking unit processes an image obtained by imaging an area including the front point and the rear point, thereby The vehicle is detected while the vehicle is about to pass, and the vehicle is tracked while maintaining the state where the vehicle identification information is given to the vehicle.
  • the vehicle tracking means processes a reflected wave returned by an electromagnetic wave transmitted toward a region including the front point and the rear point.
  • the vehicle is detected in such a manner that the vehicle is about to pass the front point, and the vehicle is tracked while the vehicle identification information is given to the vehicle.
  • the vehicle tracking means includes the Front number plate information acquisition means for capturing the front number plate information by imaging a front number plate of a vehicle passing through the front point on a pillar located between the front point and the rear point; and It is installed with rear number plate information acquisition means that captures the rear number plate information of the vehicle that passes the rear point and acquires the rear license plate information, detects the vehicle that is about to pass the front point, The vehicle is tracked while maintaining the state where the vehicle identification information is given to the vehicle.
  • the invention according to claim 5 is the above invention, wherein the vehicle tracking means is arranged in front of a vehicle passing through the front point on a pillar located upstream or downstream from the front point and the rear point.
  • a front license plate information acquisition means for capturing the front license plate information by capturing the front license plate; and a rear section for capturing the rear license plate information by capturing the rear license plate of the vehicle passing through the rear point. It is installed separately from the license plate information acquisition means, and detects a vehicle that is about to pass through the forward point, and keeps track of the vehicle while maintaining the state where the vehicle identification information is given to the vehicle.
  • the front license plate information and the rear license plate information are obtained for each lane in a plurality of lanes, and the vehicle tracking is performed.
  • the means detects the vehicle that is about to pass through the front point for each lane, and the vehicle identification information until the detected vehicle passes through the rear point of one of the lanes from the front point.
  • the front information holding means and the rear information holding means hold the license plate information and the vehicle identification information in association with each lane, and keep the front portion.
  • the rear associating means compares the vehicle identification information of the same lane held in the front information holding means and the rear information holding means, and is given the same vehicle identification information.
  • the front license plate information and rear license plate information are associated with each other, and the same vehicle identification information is assigned to the front license plate information and rear license plate information. If there is no information, separate vehicles held in the front information holding means and the rear information holding means The vehicle identification information of the lines is compared, the same vehicle identification information is given, and the front number plate information and the rear number plate information are associated with each other.
  • the color information and shape information of the vehicle from which the front license plate information is acquired, and the vehicle from which the rear license plate information is acquired are stored in association with each other, and the front / rear association unit compares the vehicle identification information, color information, and shape information stored in the front information storage unit and the rear information storage unit.
  • the same vehicle identification information, color information, and shape information are assigned to correspond to the front license plate information and the rear license plate information. It is characterized by attaching.
  • the front / rear associating means compares the vehicle identification information and time information held in the front information holding means and the rear information holding means, and compares the vehicle identification information and time information with each other.
  • the front license plate information and the rear license plate information to which time information is assigned are associated with each other.
  • the front license plate information and the rear license plate information associated by the front / rear associating means are compared with each other for the same vehicle. It is further characterized by further comprising a collating means for collating the force force.
  • the front license plate information displayed on the front license plate of the vehicle passing through the front point is acquired, and the vehicle passes through the rear point.
  • Rear pick-up displayed on the rear license plate of the vehicle A license plate information acquisition program that acquires one plate information and associates the front license plate information and the rear license plate information with each other.
  • a vehicle tracking procedure for tracking the vehicle while maintaining the vehicle identification information for uniquely identifying the vehicle from the front point to the rear point, and the front pick-up Before acquiring the vehicle identification information given by the vehicle tracking procedure to the vehicle for which the plate information is acquired, and holding the front license plate information and the vehicle identification information acquired in association with the vehicle force.
  • the invention according to claim 11 acquires the front license plate information displayed on the front license plate of the vehicle passing through the front point and is displayed on the rear license plate of the vehicle passing through the rear point.
  • a license plate information acquisition method that associates the front license plate information and the rear license plate information with each other, and detects the vehicle that is about to pass the front point and detects the detected vehicle.
  • the vehicle identification information given to the vehicle from which the license plate information is acquired is given by the vehicle tracking process.
  • the front number plate information and the vehicle identification information acquired from the vehicle are associated with each other and stored in the front information holding step, and the vehicle tracking step is given to the vehicle from which the rear number plate information is acquired.
  • the vehicle information is acquired, and the rear license plate information and the vehicle identification information acquired from the vehicle are stored in association with each other, and held in the front information holding step and the rear information holding step.
  • a front and rear associating step for associating the front plate number information and the rear number plate information to which the same vehicle identification information is given. To do.
  • the vehicle that is about to pass through the front point is detected, and the vehicle is uniquely identified until the detected vehicle passes from the front point to the rear point.
  • the state in which the vehicle identification information for identification is given to the vehicle is retained, the vehicle identification information given to the vehicle from which the front pick-up plate information is obtained is obtained, and the vehicle identification information obtained from the vehicle.
  • the part number plate information and the vehicle identification information are associated with each other, and the rear part number plate information is given to the vehicle from which the rear part number plate information is obtained.
  • a vehicle that attempts to pass through the front point by processing the reflected wave returned by the electromagnetic wave transmitted toward the region including the front point and the rear point. And tracking the vehicle while maintaining the state in which the vehicle identification information is given to the vehicle, so that it is difficult to recognize the image (for example, at night) compared to the method using image recognition technology. Even if it exists, it becomes possible to track the vehicle.
  • the vehicle tracking means images the front number plate of the vehicle passing through the front point on the pillar located between the front point and the rear point.
  • Front license plate information acquisition means for acquiring plate information
  • rear It is installed with the rear license plate information acquisition means that captures the rear license plate information by capturing the rear license plate of the vehicle passing the direction, and detects the vehicle trying to pass the front point and also provides the vehicle identification information. Since the vehicle is tracked while maintaining the state given to the vehicle, it is possible to reduce the cost of installation compared to the method of installing the vehicle tracking means at a remote position.
  • the vehicle tracking means has a front part that images the front license plate of the vehicle passing through the front point on a column located upstream or downstream from the front point and the rear point. Installed separately from the camera and the rear camera that captures the rear license plate of the vehicle that passes through the rear point, detects the vehicle that is about to pass through the front point, and maintains the state where the vehicle identification information is given to the vehicle Therefore, for example, compared to a method in which a vehicle tracking means using a fisheye lens is installed on the same column in order to image a monitoring range, it takes time to correct the image captured by the fisheye lens. The processing speed of vehicle tracking can be increased by the amount shortened.
  • the front license plate information and the rear license plate information are acquired for each lane in a plurality of lanes, and the vehicle tries to pass the front point for each lane.
  • the vehicle is tracked while maintaining the state in which the vehicle identification information is given to the vehicle until the detected vehicle passes through the rear point of any lane from the front point.
  • Number plate information and vehicle identification information are stored in association with each other, vehicle identification information in the same lane is compared, and there is front license plate information and rear license plate information to which the same vehicle identification information is assigned.
  • the front license plate information is associated with the front license plate information and the same vehicle identification information is assigned.
  • the vehicle identification information of different lanes is compared and the front license plate information and the rear license plate information to which the same vehicle identification information is assigned are associated with each other. Even if the vehicle changes lanes, the license plate information on the front and rear can be matched with the same vehicle consistently, and the information generated in multiple lanes can be held collectively Compared to the method, the front license plate information and the time required for searching are shortened. The processing speed for associating the rear license plate information can be increased.
  • the color information and the shape information are associated with the license plate information and the vehicle identification information, and the vehicle identification information, the color information and the shape information are compared, and the same vehicle identification information, color information and shape information are given. Since the front number plate information and the rear license plate information are associated with each other, there are a plurality of criteria for determining consistency, and the reliability of consistency can be increased.
  • the time information indicating the time when the front license plate information is acquired and the time information indicating the time when the rear license plate information is acquired are respectively acquired.
  • the front license plate information and the rear license plate information to which the same vehicle identification information or adjacent time information is given are compared.
  • the association even if the vehicle cannot be tracked, it can be associated with consistency based on the time information.
  • FIG. 1 is a diagram for explaining the outline and features of a license plate information acquisition device.
  • FIG. 2 is a diagram showing an overview of a license plate information acquisition device.
  • FIG. 3 is a block diagram showing a configuration of a license plate information acquisition apparatus.
  • FIG. 4 is a diagram showing an example of information stored in a front license plate information storage unit.
  • FIG. 5 is a diagram showing an example of reading license plate information.
  • FIG. 6 is a diagram showing an example of information stored in a rear license plate information storage unit.
  • FIG. 7 is a diagram illustrating an example of a situation in which a vehicle is tracked.
  • FIG. 8 is a diagram showing an example of information stored in a front and rear license plate information storage unit.
  • FIG. 9 is a flowchart showing the flow of the front license plate information generation process.
  • FIG. 10 is a flowchart showing the flow of a rear license plate information generation process.
  • FIG. 11 is a flowchart showing the flow of a vehicle tracking process.
  • FIG. 12 is a flowchart showing the flow of processing for associating license plate information.
  • FIG. 13 is a flowchart showing the flow of a license plate information collating process.
  • FIG. 14 is a diagram illustrating an overview of a license plate information acquisition apparatus according to a second embodiment.
  • FIG. 15 is a block diagram showing a configuration of a license plate information acquisition apparatus according to the second embodiment.
  • FIG. 16 is a flowchart showing a flow of a license plate information association process according to the second embodiment.
  • FIG. 17 is a diagram illustrating an overview of a license plate information acquisition apparatus according to a third embodiment.
  • FIG. 18 is a diagram illustrating a computer that executes a license plate information acquisition program.
  • FIG. 19 is a diagram for explaining a conventional license plate information association processing technique.
  • License plate information acquisition device Front license plate information generation device Front camera
  • Rear license plate image storage unit Rear license plate information storage unit Rear vehicle detection processing unit
  • Rear license plate recognition unit Rear license plate information reader Vehicle tracking device
  • Vehicle tracking unit 44 Vehicle identification information transmitter
  • FIG. 1 is a diagram for explaining the outline and features of the license plate information acquisition apparatus according to the first embodiment.
  • FIG. 2 is a diagram illustrating an overview of the license plate information acquisition apparatus according to the first embodiment.
  • the license plate information acquisition device 10 is fixed to the pillar 1 standing on the side of the roadway, and the front camera 21, the rear camera 31, and the fisheye lens camera 41 have the pillar 1 above the roadway.
  • the license plate information acquisition apparatus 10 is connected to the front camera 21, the rear camera 31, and the fisheye lens camera 41 with a dedicated cable.
  • the front camera 21 always images the front point 3, which is the imaging area of the front camera 21, and outputs the image data to the license plate information acquisition device 10, and the rear camera 31 similarly
  • the rear point 4 which is the imaging area of the rear camera 31 is always imaged, and the image data is output to the license plate information acquisition device 10.
  • the fisheye lens camera 41 covers a wide area including the front point 3 and the rear point 4. Always take an image and Is output to the license plate information acquisition device 10.
  • the outline of the license plate information acquisition device 10 is that the front license plate information displayed on the front license plate of the vehicle 2 passing through the front point 3 is acquired and the rear point 4 is passed.
  • the rear license plate information displayed on the rear license plate of the vehicle 2 is acquired, and the front license plate information and the rear number plate information are associated with each other.
  • the license plate information acquisition device 10 is mainly characterized in that the front and rear license plate information, which is not affected by the movement of the vehicle, is associated with the same vehicle with consistency.
  • the license plate information acquisition device 10 detects a vehicle that is about to pass through the front point 3, and the detected vehicle passes from the front point 3 to the rear point 4. The vehicle is tracked while maintaining the state in which the vehicle identification information for uniquely identifying the vehicle is given to the vehicle.
  • the license plate information acquisition apparatus 10 tries to pass the front point 3 by processing the image data received from the fisheye lens camera 41.
  • the vehicle 2 is detected and the vehicle identification information “A” is given (see (1) of (A) in FIG. 1).
  • the license plate information acquisition device 10 is configured so that the vehicle identification information “ Keep track of “A” and track vehicle 2.
  • the license plate information acquisition device 10 holds the vehicle identification information given to the vehicle in association with the front license plate information acquired for the vehicle force, and similarly to the vehicle.
  • the vehicle identification information given to the vehicle is held in association with the rear license plate from which the vehicle force was acquired.
  • the license plate information acquisition device 10 keeps and tracks the state to which the vehicle identification information “A” is given, and the vehicle 2 (hereinafter, “ When vehicle “A”) enters forward point 3, the front license plate information (for example, serial number “00-11”) obtained by processing the image data received from front camera 21 and the vehicle identification information “A” is associated and stored in the front license plate information storage unit 24 (see (2) of (B) in FIG. 1).
  • the license plate information acquisition device 10 acquires the image data received from the rear camera 31 when the vehicle “A” enters the rear point 4 by processing.
  • the rear license plate information (for example, serial number “00-11”) and the vehicle identification information “A” are stored in association with each other in the rear license plate information storage unit 34 ((D) in FIG. 3)).
  • the license plate information acquisition apparatus 10 compares the vehicle identification information and associates the front license plate information and the rear license plate information to which the same vehicle identification information is assigned.
  • the license plate information acquisition device 10 holds information held in the front license plate information storage unit 24 and held in the rear license plate information storage unit 34. Information is compared based on the vehicle identification information, and the same vehicle identification information “A” is given to the front license plate information “00-11” and the rear license plate information “00-11”. Are stored in the front and rear license plate information storage unit 51 (see (4) of FIG. 1D).
  • the license plate information acquisition device 10 collates the associated front license plate information “00-11” with the rear license plate information “00-11” and transmits the collation result to a preset destination. To do.
  • the license plate information acquiring apparatus 10 does not depend on the movement of the vehicle, as described above, that is, the vehicle is in front and rear imaging points. Even if the vehicle is temporarily stopped in the section with the point, if another vehicle overtakes the temporarily stopped vehicle, or if the vehicle changes lanes in multiple lanes, the front and rear License plate information can be consistently associated with the same vehicle.
  • FIG. 3 is a block diagram showing the configuration of the license plate information acquisition apparatus 10.
  • the license plate information acquisition device 10 includes a front license plate information generation device 20, a rear license plate information generation device 30, a vehicle tracking device 40, and a license plate information verification device 50. It consists of.
  • the front license plate information generating device 20 includes a front image temporary storage unit 22, a front number plate image storage unit 23, a front license plate information storage unit 24, and a front vehicle detection processing unit. 25, a front license plate recognition unit 26, and a front license plate information reading unit 27, which are connected to the front camera 21.
  • the front license plate information storage unit 24 corresponds to “front information holding unit” recited in the claims.
  • the front camera 21 always images a forward point upstream of the roadway, and outputs image data of the forward point to the front image temporary storage unit 22 in real time.
  • the front image temporary storage unit 22 temporarily stores the image data of the front point received via the front camera 21.
  • the front license plate image storage unit 23 stores image data including the front license plate of the vehicle. Specifically, the front license plate image storage unit 23 receives and stores image data including the front license plate from the front license plate recognition unit 26 described later.
  • the front license plate information storage unit 24 uses the front license plate information acquired from the vehicle and the vehicle identification information transmission unit 44 of the vehicle tracking device 40 described later when the vehicle enters the forward point.
  • the output vehicle identification information is stored in association with each other.
  • front license plate information and vehicle identification information are received from a front license plate information reading unit 27 described later, and stored in association with each other.
  • the front license plate information storage unit 24 stores the vehicle identification information “A” and the front number plate information “00-11” in association with each other.
  • the front vehicle detection processing unit 25 processes the image data of the front point in real time to determine whether or not the vehicle has entered the image. Specifically, the front vehicle detection processing unit 25 reads the image data of the front point from the front image temporary storage unit 22 and recognizes the temporally fluctuating area in the image (background difference or interframe difference). If a vehicle approach is detected in the image by pattern recognition technology, etc., and it is determined that the vehicle has entered, an image including the front license plate is displayed in the front license plate recognition unit 26 described later. Outputs a signal instructing data acquisition.
  • the front license plate recognition unit 26 recognizes the front license plate in the image and A region including the license plate is cut out and the image data is acquired. In particular,
  • the front license plate recognition unit 26 receives a signal from the front vehicle detection processing unit 25.
  • the front license plate information reading unit 27 generates image data including front license plates. Specifically, the front license plate information reading unit 27 reads image data including the front license plate from the front license plate image storage unit 23, and uses the OCR (Optical Character Reader) technology or the like to read the front license plate information. Read the written information and generate the front license plate information. Further, the front license plate information reading unit 27 receives the vehicle identification information from the vehicle identification information transmitting unit 44 provided in the vehicle tracking device 40 described later, and outputs the vehicle identification information and the generated front license plate information. Store in the front license plate information storage unit 24.
  • OCR Optical Character Reader
  • the front license plate information reading unit 27 displays the serial number which is one of the information described in the front license plate as “79-36”. As the text data 702, the front license plate information is generated. In addition, the front license plate information reading unit 27 reads only the serial number here, and in addition to the power serial number that generated the front license plate information, the information written on the license plate, that is, the code of the land transportation branch office, The application code or the vehicle type code may be read, and any one or more including the serial number may be generated as the front license plate information.
  • the rear license plate information generating device 30 includes a rear image temporary storage unit 32, a rear license plate image storage unit 33, a rear license plate information storage unit 34, and a rear vehicle detection.
  • a processing unit 35, a rear license plate recognition unit 36, and a rear number plate information reading unit 37 are provided, and are connected to the rear camera 31.
  • the rear license plate recognition unit 36 and the rear license plate information reading unit 37 are respectively a front image temporary storage unit 22, a front license plate image storage unit 23, and a front vehicle detection processing unit 25.
  • the rear license plate information storage unit 34 corresponds to the “rear information holding unit” recited in the claims.
  • the rear camera 31 always images a rear point downstream of the roadway and outputs image data of the rear point to the rear image temporary storage unit 32 in real time.
  • the rear license plate information storage unit 34 is output when the vehicle enters the rear point by the rear license plate information acquired from the vehicle and the vehicle identification information transmission unit 44 of the vehicle tracking device 40 described later.
  • the vehicle identification information is stored in association with each other.
  • the rear license plate information and the vehicle identification information are received from the rear license plate information reading unit 37 and stored in association with each other.
  • the rear license plate information storage unit 34 stores the vehicle identification information “A” and the front license plate information “00-11” in association with each other.
  • the vehicle tracking device 40 includes a monitoring image storage unit 42, a vehicle tracking unit 43, and a vehicle identification information transmission unit 44, and is connected to the fisheye lens camera 41.
  • the vehicle tracking unit 43 corresponds to “vehicle tracking means” described in the claims.
  • the fish-eye lens camera 41 constantly captures a wide area, which is an area including the front point and the rear point, and outputs image data of the wide area to the monitoring image storage unit 42 in real time.
  • the monitoring image storage unit 42 stores image data of a wide area received via the fisheye lens camera 41.
  • Vehicle identification information for uniquely identifying the vehicle until the vehicle tracking unit 43 detects the vehicle that is about to pass through the front point and the detected vehicle passes through the front point force and the rear point. The vehicle is tracked while maintaining the state where the vehicle is assigned to the vehicle.
  • the vehicle tracking unit 43 reads a wide range of image data from the monitoring image storage unit 42, and recognizes a temporally fluctuating region in the image (background difference frame). If the vehicle is detected in the image using pattern recognition technology, The vehicle is tracked by a technique such as optical 'flow' while giving vehicle identification information to the vehicle. Further, the vehicle tracking unit 43 transmits the vehicle identification information given to the vehicle and the vehicle identification information to the front license plate information generation device 20 when the vehicle passes the front point or the rear point, respectively. Information of the transmission destination indicating whether or not to transmit to the rear license plate information generating device 30 is output to the vehicle identification information transmitting unit 44.
  • the vehicle tracking unit 43 gives vehicle identification information “A” to the vehicle 801 detected in the image, and tracks the vehicle “A”. Further, since the vehicle “A” passes through the front point, the vehicle tracking unit 43 displays the vehicle identification information “A” and the destination information indicating transmission to the front number plate information generating device 20. Output to vehicle identification information transmitter 4 4.
  • the vehicle tracking unit 43 recognizes the vehicle “A” even when the vehicle 801 is stopped between the front point and the rear point. Continue tracking.
  • the vehicle tracking unit 43 detects the vehicle 802 behind the vehicle 801, adds vehicle identification information “B”, and tracks the vehicle “B”.
  • the vehicle tracking unit 43 recognizes the vehicle 802 as the vehicle “B” and continues tracking even when the vehicle 802 passes over the vehicle 801. Recognize the stopped vehicle 801 as vehicle “A” and continue tracking.
  • the vehicle tracking unit 43 sends the vehicle identification information “B” to the front license plate information generating device 20 when the vehicle “B” passes the front point and the rear point, respectively.
  • Information on the transmission destination indicating transmission or information on the transmission destination indicating transmission to the rear license plate information generation device 30 is output to the vehicle identification information transmission unit 44.
  • the vehicle tracking unit 43 recognizes the vehicle “A” and continues tracking even when the vehicle 801 starts.
  • the vehicle tracking unit 43 sends the vehicle identification information “A” and transmission destination information indicating transmission to the rear license plate information generating device 30 when the vehicle “A” passes the rear point.
  • the information is output to the identification information transmitting unit 44.
  • the vehicle identification information transmitting unit 44 outputs the vehicle identification information to the front number plate information generation device 20 or the rear number plate information generation device 30. Specifically, when receiving the vehicle identification information from the vehicle tracking unit 43, the vehicle identification information transmission unit 44, based on the destination information received together with the vehicle identification information, The vehicle identification information is transmitted to the rear license plate information generating device 30.
  • the license plate information collating apparatus 50 includes a front and rear license plate information storage unit 51, a correspondence processing unit 52, a collation unit 53, and a transmission unit 54.
  • the association processing unit 52 corresponds to “front / rear association means” described in the claims.
  • the front and rear number plate information storage unit 51 stores front number plate information and rear number plate information in association with each other. Specifically, the front license plate information and the rear license plate information are received from the association processing unit 52, which will be described later, and stored in association with each other. For example, as shown in FIG. 8, the front and rear number plate information storage unit 51 stores front number plate information “00-11” and rear number plate information “00-11” in association with each other.
  • the association processing unit 52 compares the vehicle identification information stored in the front license plate information storage unit 24 and the rear number plate information storage unit 34, and the front number to which the same vehicle identification information is given. Associate plate information and rear license plate information. Specifically, when a predetermined time (for example, every 6 hours) elapses, the front license plate information storage unit 24 and the rear license plate information storage unit 34 are based on the vehicle identification information associated with the license plate information. Then, the front license plate information and the rear license plate information are read from each other and stored in the front and rear part number plate information storage unit 51 in association with each other. When all the information stored in the front license plate information storage unit 24 and the rear license plate information storage unit 34 is read, the association processing unit 52 reads the front license plate information associated with the verification unit 53 described later. And a signal for instructing collation of the rear license plate information.
  • a predetermined time for example, every 6 hours
  • the collation unit 53 compares the front license plate information and the rear license plate information associated with each other by the association processing unit 52, and collates whether or not they belong to the same vehicle. Specifically, when the verification unit 53 receives a signal from the correspondence processing unit 52, the matching unit 53 displays the front number plate information and the rear number plate information associated with each other. When the two are read and compared from the bar plate information storage unit 51 and are the same, a signal instructing transmission of the information related to “normal vehicle passing” is output to the transmission unit 54, and when both are different, Then, a signal instructing transmission of information related to “passing abnormal vehicle” is output to the transmission unit 54.
  • the transmission unit 54 transmits information related to the presence or absence of abnormality of the passing vehicle to a preset transmission destination (for example, a VICS center or each prefectural traffic control center). Specifically, when a signal is received from the verification unit 53, the information related to “passing normal vehicle” or the information related to “passing abnormal vehicle” is transmitted to a preset transmission destination.
  • a preset transmission destination for example, a VICS center or each prefectural traffic control center.
  • FIG. 9 is a flowchart showing the flow of the front license plate information generation process
  • FIG. 10 is a flowchart showing the flow of the rear license plate information generation process
  • FIG. 11 is a flowchart showing the flow of the vehicle tracking process
  • FIG. 12 is a flowchart showing the flow of the license plate information association processing
  • FIG. 13 is a flowchart showing the flow of the license plate information matching processing.
  • the front license plate information generating device 20 detects a vehicle in the front point image by the front vehicle detection processing unit 25 (Yes in step S901), the front number plate recognition unit 26
  • the front license plate is recognized in the image of the front point (step S902), the area including the front license plate is cut out, and the image data is stored in the front license plate image storage unit 23 (step S903).
  • the front license plate information generating device 20 generates front license plate information by the front license plate information reading unit 27 (step S904), and the vehicle identification information is transmitted from the vehicle identification information transmitting unit 44. If received (Yes at step S905), the vehicle identification information and the front license plate information are associated with each other and stored in the front license plate image storage unit 23 (step S906), and the process is terminated.
  • the rear license plate information generation device 30 performs the rear vehicle detection process.
  • the rear number plate recognition unit 36 recognizes the rear number plate in the rear point image (step S1002), and the rear number plate is The included area is cut out, and the image data is stored in the rear license plate image storage unit 33 (step S1003).
  • the rear license plate information generating device 30 generates the rear license plate information by the rear license plate information reading unit 37 (step S 1004), and receives the vehicle identification information from the vehicle identification information transmitting unit 44. (Yes in step S1005), the vehicle identification information and the rear license plate information are associated with each other and stored in the rear license plate image storage unit 33 (step S1006), and the process is terminated.
  • step S 1101 when the vehicle tracking unit 40 detects the vehicle in the image of the monitoring range by the vehicle tracking unit 43 (step S 1101), the vehicle tracking device 40 adds the vehicle identification information to the vehicle and tracks the vehicle (step S 1101). Step S1102). Then, when the vehicle being tracked enters the forward point (step S1103), the vehicle tracking device 40 transmits the vehicle identification information given to the vehicle to the front license plate information reading unit 27 by the vehicle identification information transmitting unit 44. (Step S1104). Then, the vehicle tracking device 40 continues to track the vehicle, and when the vehicle enters a rear point (step S1105), the vehicle identification information given to the vehicle is read by the rear license plate information by the vehicle identification information transmitting unit 44. This is transmitted to the unit 37 (step S1106), and the process is terminated.
  • the license plate information matching device 50 when a predetermined time has elapsed (Yes in step S1201), causes the correspondence processing unit 52 to perform the front license plate information storage unit.
  • One front license plate information is acquired from 24 (step S1202), and based on the vehicle identification information associated with the front number plate information, the same vehicle identification information is obtained from the rear license plate information storage unit 34.
  • the associated rear license plate information is acquired (step S 1203), and both are associated and stored in the front and rear license plate information storage unit 51 (step S 1204). If the license plate information matching device 50 has not acquired all the front license plate information (No at step S1205). The same operation is continued until all the front license plate information is acquired. When all the front license plate information is acquired (Yes at step S1205), the processing by the association processing unit 52 is terminated.
  • the license plate information collation device 50 receives the associated front license plate information and rear license plate information. Is obtained from the front and rear number plate information storage unit 51 by the collation unit 53, and the two are collated (step S1302). Then, if the both match each other (step S1303 affirmative), the numbering plate information collating device 50 transmits the information related to “normal vehicle passing” to a preset transmission destination (step S1303). If the two are different (No at step S1303), the transmission unit 54 transmits the information related to “passing abnormal vehicle” to a preset transmission destination (step S1305).
  • the license plate information collating device 50 determines that all collations with respect to the associated front license plate information and rear license plate information stored in the front and rear license plate information storage unit 51 have not been completed (No in step S1306). ), The same operation is continued until all the collations are completed. When all collations are completed (Yes in step S1306), the processes by the collation unit 53 and the transmission unit 54 are terminated.
  • a vehicle that is about to pass through a forward point is detected, and the vehicle is uniquely identified until the detected vehicle passes through a forward point force and a backward point.
  • the vehicle identification information of the vehicle is tracked while maintaining the state where the vehicle identification information is assigned to the vehicle, the vehicle identification information assigned to the vehicle for which the front license plate information is obtained is obtained, and the vehicle force is also obtained.
  • the front license plate information and the vehicle identification information are held in association with each other, the vehicle identification information given to the vehicle for which the rear license plate information is acquired is acquired, and the rear license plate information acquired for the vehicle force is acquired.
  • Information and vehicle identification information are stored in association with each other, and the stored vehicle identification information is compared, and the front license plate information and the rear number are assigned with the same vehicle identification information. Since the bar plate information is associated, the front part that does not depend on the movement of the vehicle and It is possible to associate the rear license plate information with the same vehicle with consistency. In other words, even when the vehicle is temporarily stopped between the front and rear points, re-starts and enters the rear point, the front and rear license plate information is consistently associated with those of the same vehicle.
  • the front and rear number plate information can be consistently associated with the same vehicle, and Even when a vehicle changes lanes in multiple lanes, it is possible to associate the front and rear license plate information with the same vehicle with consistency.
  • the vehicle by processing an image obtained by imaging a region including the front point and the rear point, a vehicle that attempts to pass the front point is detected, and vehicle identification information is also obtained. Since the vehicle is tracked while maintaining the state where the vehicle is assigned to the vehicle, it is possible to track the vehicle even in a situation where a plurality of vehicles are dense, as compared with the method using electromagnetic waves.
  • the fisheye lens camera connected to the vehicle tracking device is installed on the pillar located between the front point and the rear point together with the front camera and the rear camera, and tries to pass the front point.
  • the vehicle is tracked while maintaining the state in which the vehicle identification information is applied to the vehicle. This makes it possible to reduce the installation costs.
  • the front license plate information and the rear license plate information associated by the license plate information verification device are compared to verify whether they are from the same vehicle. Therefore, it is possible to improve the accuracy of detecting the violating vehicle.
  • the license plate information acquisition device collates the front number plate information and the rear license plate information in a consistent state, it is possible to improve the accuracy of detecting a violating vehicle.
  • FIG. 14 is a diagram illustrating an overview of the license plate information acquisition apparatus according to the second embodiment.
  • the license plate information acquisition device 60 is fixed to the pillar 1 standing on the side of the roadway facing forward and in the same manner as in the first embodiment, and the first lane front camera 71, The first lane rear camera 81 and the fisheye lens camera 91 are fixed to a portion where the pillar 1 protrudes upward in the roadway.
  • the second lane front camera 101 and the second lane rear camera 111 are installed on the pillar 5 standing on the side of the roadway in front, and the license plate information acquisition device 60 and the first lane front camera are installed.
  • the first lane rear camera 81, the fisheye lens camera 91, the second lane front camera 101, and the second lane rear camera 111 are connected by a dedicated cable.
  • the first lane front camera 71 always images the first lane front point 6, which is the imaging area of the first lane front camera 71, and outputs the image data to the license plate information acquisition device 60.
  • the first lane rear camera 81 always images the first lane rear point 7 which is the imaging area of the first lane rear camera 81, and outputs the image data to the license plate information acquisition device 60.
  • the second lane front camera 101 always images the second lane front point 8 which is the imaging area of the second lane front camera 101, outputs the image data to the license plate information acquisition device 60
  • the second lane rear camera 111 constantly images the second lane rear point 9 that is the imaging area of the second lane rear camera 111 and outputs the image data to the license plate information acquisition device 60.
  • the fisheye lens camera 91 always captures a wide area including the first lane front point 6, the first lane rear point 7, the second lane front point 8, and the second lane rear point 9, and similarly, the image data Is output to the license plate information acquisition device 60.
  • FIG. 15 is a block diagram showing the configuration of the license plate information acquisition device 60.
  • this license plate information acquisition device 60 is connected to the front lane of the first lane.
  • the first lane front license plate information generating device 70 includes a first lane front image temporary storage unit 72, a first lane front license plate image storage unit 73, and a first lane front number picker.
  • the first lane front license plate information storage unit 74 corresponds to the “front information holding means” recited in the claims.
  • the first lane rear license plate information generation device 80 includes a first lane rear image temporary storage unit 82, a first lane rear license plate image storage unit 83, and a first lane rear license plate information storage unit. 84, a first lane rear vehicle detection processing unit 85, a first lane rear number plate recognition unit 86, and a first lane rear license plate information reading unit 87, which are connected to the first lane rear camera 81. .
  • the first lane rear license plate information storage unit 84 corresponds to “rear information holding means” recited in the claims.
  • the vehicle tracking device 90 includes a monitoring image storage unit 92, a vehicle tracking unit 93, and a vehicle identification information transmission unit 94, and is connected to the fisheye lens camera 91.
  • the vehicle tracking unit 93 corresponds to “vehicle tracking means” described in the scope of the request.
  • the second lane front license plate information generating device 100 includes a second lane front image temporary storage unit 102, a second lane front license plate image storage unit 103, and a second lane front part navigator.
  • the second lane front license plate information storage unit 104 corresponds to “front information holding means” described in the claims.
  • the second lane rear license plate information generating device 110 includes a second lane rear image temporary storage unit 112, a second lane rear license plate image storage unit 113, and a second lane rear license plate information storage. 114, second lane rear vehicle detection processing unit 115, second lane after A license plate recognition unit 116 and a second lane rear license plate information reading unit 117 are connected to the second lane rear camera 111.
  • the second lane rear license plate information storage unit 114 corresponds to “rear information holding means” recited in the claims.
  • License plate information collation apparatus 120 includes front and rear license plate information storage unit 121, association processing unit 122, collation unit 123, and transmission unit 124.
  • the association processing unit 122 corresponds to the “front / rear association unit” recited in the claims.
  • Rear image temporary storage unit 32, rear license plate image storage unit 33, rear license plate information storage unit 34, rear vehicle detection processing unit 35, rear license plate recognition unit 36, and rear license plate information reading unit 30 The processing is the same as that of part 37, so the explanation is omitted.
  • the monitoring image storage unit 92 in the vehicle tracking device 90 performs the same processing as the monitoring image storage unit in the vehicle tracking device 40 according to the first embodiment, and thus the description thereof is omitted.
  • the front and rear license plate information storage unit 121, the matching unit 123, and the transmission unit 124 are respectively the front and rear license plate information storage unit 51 and the verification unit 53 in the license plate information verification device 50 according to the first embodiment. Since the processing is the same as that of the transmission unit 54, the description thereof is omitted. Therefore, only the vehicle tracking unit 93, the vehicle identification information transmission unit 94, and the association processing unit 122 will be described below.
  • the vehicle tracking unit 93 detects a vehicle that is about to pass through the first lane forward point or the second lane forward point, and the detected vehicle is the first lane forward point or the second lane forward point from the first lane forward point. Until the vehicle passes the rear lane point or the second rear lane point, the vehicle is tracked with the vehicle identification information for uniquely identifying the vehicle being maintained.
  • the vehicle tracking unit 93 reads image data of a wide range from the monitoring image storage unit 92 and, when a vehicle is detected in the image, continuously gives vehicle identification information to the vehicle. Track the vehicle.
  • the vehicle tracking unit 93 also includes vehicle identification information given to the vehicle when the vehicle passes through the first lane front point, the second lane front point, the first lane rear point, or the second lane rear point,
  • the vehicle identification information is transmitted to the first lane front number plate information generation device 70, the first lane rear number plate information generation device 80, or the second lane front number plate information generation device 100.
  • the destination information indicating whether to transmit to the second lane rear license plate information generator 110 is output to the vehicle identification information transmitter 94.
  • the vehicle identification information transmission unit 94 sends the vehicle identification information to the first lane front license plate information generation device 70, the first lane rear license plate information generation device 80, and the second lane front number plate information generation device 100. Or the second lane rear license plate information generator Output to device 110.
  • the vehicle identification information transmission unit 94 performs vehicle tracking when the vehicle passes through the first lane front point, the second lane front point, the first lane rear point, or the second lane rear point.
  • the vehicle identification information is received from the part 93, the first lane front number plate information generation device 70, the first lane rear number plate information generation device 80, the first lane
  • the vehicle identification information is transmitted to the two-lane front license plate information generation device 100 or the second lane rear license plate information generation device 110.
  • Corresponding processing unit 122 includes first lane front license plate information storage unit 74, first lane rear license plate information storage unit 84, second lane front license plate information storage unit 104, and second lane rear unit.
  • the vehicle identification information stored in the license plate information storage unit 114 is compared, and the same vehicle identification information is given to associate the front license plate information and the rear license plate information.
  • the first lane front license plate information storage unit 74 Read the front license plate information and the rear license plate information from the 1st lane rear license plate information storage section 84, the second lane front license plate number storage section 104 and the second lane rear license plate information storage section 114. Are stored in the front and rear license plate information storage unit 121 in association with each other.
  • the processing of the correspondence processing unit 122 will be described later with reference to FIG.
  • FIG. 16 is a flowchart illustrating the flow of the license plate information association processing according to the second embodiment.
  • the license plate information collating device 120 when a predetermined time has elapsed (Yes in step S1601), causes the correspondence processing unit 122 to change the number plate information collating device 120 from the first lane front number plate information storage unit 74.
  • First lane front license plate information (step S 1602), and the vehicle identification information associated with the first lane front license plate information Based on the first lane rear license plate information storage unit 84, the first lane rear license plate information associated with the same vehicle identification information is searched (step S1603).
  • step S 1604 When the license plate information matching device 120 finds the first lane rear license plate information associated with the same vehicle identification information by the association processing unit 122 (Yes in step S1604), both Is stored in the front and rear license plate information storage unit 121 (step S 1605). If not found! / (Step S 1604 negative), the second lane rear license plate information storage unit 114 is searched, The second lane rear license plate information associated with the same vehicle identification information is found, and both are associated and stored in the front and rear license plate information storage unit 121 (step S 1606).
  • step S1607 When the license plate information collating device 120 has not acquired all the first lane front number plate information (No in step S1607), all the first lane front number plates are obtained. The same processing is continued by the correspondence processing unit 122 until the information is acquired, and when all the first lane front number plate information is acquired (Yes in step S1607), the correspondence processing unit 122 similarly performs the second lane front.
  • One second lane front number plate information is acquired from the part number plate information storage unit 104 (step S1608), and the second lane front number plate information is stored on the basis of the vehicle identification information associated with the second lane front number plate information.
  • the second lane rear license plate information associated with the same vehicle identification information is searched from the lane rear license plate information storage unit 114 (step S1609).
  • the license plate information matching device 120 uses the correspondence processing unit 122 to Are stored in the front and rear license plate information storage unit 121 (step S 1611) . If not found (step S 1610 negative), the first lane rear license plate information storage unit 84 is searched and the same. The first lane rear license plate information associated with the vehicle identification information is found, and both are associated and stored in the front and rear license plate information storage unit 121 (step S 1612).
  • the license plate information acquisition apparatus in two lanes has been described. However, in a plurality of lanes of two or more lanes, a front camera and a rear camera are installed for each lane, and If the license plate information and the rear license plate information are generated, they can be matched with each other.
  • the front license plate information and the rear picker / plate information are acquired for each lane in a plurality of lanes, and each vehicle is supposed to pass through the front point.
  • the vehicle is tracked while maintaining the state in which the vehicle identification information is given to the vehicle until the detected vehicle passes through the rear point of any lane.
  • the vehicle identification information of the other lanes is compared, the same vehicle identification information is given, and the front license plate information and the rear number plate information are associated with each other.
  • the processing speed for associating the front license plate information and the rear license plate information can be increased by the amount of time required for the search.
  • the license plate information acquisition apparatus according to the first or second embodiment has been described so far, the present invention may be implemented in various different forms other than the above-described embodiments. Therefore, in the following, the license plate information acquisition apparatus according to Example 3 is assumed. Thus, different embodiments will be described by dividing them into (1) to (7).
  • the association processing unit of the license plate information acquisition apparatus based on only the vehicle identification information associated with the license plate information, the front number plate information, the rear license plate information,
  • the present invention is not limited to this.
  • the present invention determines the consistency even if the color information or the shape information of the vehicle is used. Even so, ⁇ ⁇ .
  • the vehicle tracking unit 43 uses the vehicle color information and the shape information acquired from the image data as the vehicle identification information given to the vehicle.
  • the information is output to the identification information transmitting unit 44.
  • the front license plate information storage unit 24 stores the front license plate information, vehicle identification information, vehicle color information, and vehicle shape information in association with each other.
  • the association processing unit 52 associates the front license plate information and the rear license plate information with consistency based on the vehicle identification information, the vehicle color information, and the vehicle shape information.
  • the association processing unit 52 matches the front license plate information and the rear license plate information with consistency on condition that the vehicle identification information, the vehicle color information, and the vehicle shape information are all the same. Let's do it.
  • the color information and shape information of the vehicle from which the front license plate information has been acquired, and the color information and shape information of the vehicle from which the rear license plate information has been acquired are obtained, respectively.
  • Information is associated with license plate information and vehicle identification information, and vehicle identification information, color information and shape information are compared, and the same vehicle identification information, color information and shape information are given! Since the information and the rear license plate information are associated with each other, there are a plurality of determination criteria for achieving consistency, and the reliability of consistency can be increased.
  • the association processing unit of the license plate information acquisition apparatus based on only the vehicle identification information associated with the license plate information, the front number plate information, the rear license plate information, When matching with consistency
  • the present invention is not limited to this, but in addition to the vehicle identification information, the front time information that is the information of the time when the vehicle has passed the front point or the information of the time that has passed the rear point is used. It may be possible to determine consistency based on certain rear time information.
  • the front license plate information storage unit 24 or the rear license number stores the front license plate information and the rear license plate information in association with the vehicle identification information. Therefore, the vehicle tracking device 40 transmits the front time information and the rear time information to the front license plate information generation device 20 and the rear license plate information generation device 30, respectively, in addition to the vehicle identification information, and the front license plate information.
  • the front license plate information associated with the front time information and the rear number plate associated with the rear time information is stored.
  • the associating processing unit 52 is based on the front time information and the rear time information for the front license plate information and the rear license plate information not associated with the vehicle identification information!
  • the consistency is determined (for example, the consistency is determined such that the difference between the front time information and the rear time information is within a predetermined time), the two are associated, and the front and rear part number plate information storage unit 51 To store.
  • time information indicating the time when the front license plate information is acquired and time information indicating the time when the rear license plate information is acquired are respectively acquired, and the license plate information and the vehicle identification are acquired. Since the vehicle identification information and the time information are compared with each other, and the front license plate information and the rear license plate information to which the same vehicle identification information or adjacent time information is assigned are associated with each other. Even if it cannot be done, it is possible to match with consistency based on time information.
  • the license plate information acquisition apparatus is fixed and installed on one pillar has been described, but the present invention is not limited to this.
  • a wide range of areas including the front point and the rear point are imaged, and the image data is stored in the vehicle tracking unit 42.
  • An imaging unit 130 may be provided instead of the fisheye lens camera 41 to be output, and the imaging unit 130 may be fixed to the column 170 located downstream from the column 1.
  • the imaging unit 130 does not need to attach a fisheye lens, for example, attaches a wide-angle lens or the like to image a wide area, and outputs the image data to the vehicle tracking unit 43.
  • the front camera that images the front license plate of the vehicle that passes through the front point and the vehicle that passes through the rear point on the column located upstream or downstream of the front point and the rear point force. It is installed separately from the rear camera that images the rear license plate, and detects the vehicle that is about to pass the front point and keeps track of the vehicle with the vehicle identification information given to the vehicle.
  • vehicle tracking means using fisheye lenses are installed on the same column to capture the surveillance area, the time required for correcting images captured with fisheye lenses is shortened. It is possible to increase the vehicle tracking processing speed by that amount.
  • the license plate information acquisition device captures a wide range of areas including the front point and the rear point, and processes the image data to detect and track the vehicle.
  • the present invention is not limited to this.
  • an electromagnetic wave such as a millimeter wave is transmitted to a wide area, and the vehicle is detected and tracked by capturing the reflected wave.
  • the license plate information acquisition device 60 describes the case where the front number plate information and the rear number plate information are stored separately for each lane.
  • the present invention is not limited to this, for example, a front storage unit that integrates the first lane front number plate information storage unit 74 and the second lane front number plate information storage unit 104, and The first lane rear license plate information storage unit 84 and the second lane rear license plate information storage unit 114 are integrated so that the front number plate information and the rear license plate information are not divided into lanes. You may stir to keep them together.
  • the correspondence processing unit 122 acquires the front storage unit force front number plate information without distinguishing the lane, and searches the rear storage unit to match the same vehicle identification information. Search the rear license plate information and associate the two.
  • the processing procedures, control procedures, specific names, information including various data and parameters shown in the above documents and drawings can be changed arbitrarily unless otherwise specified.
  • the processing procedure shown in FIG. 16 the case where the first lane front license plate information is sequentially acquired from the first lane front license plate information storage unit has been described, but the present invention is not limited to this.
  • the second lane front license plate information may be obtained in order from the second lane front license plate information storage unit.
  • the vehicle identification information shown in FIG. 1 is a power expressed in alphabet.
  • the present invention is not limited to this.
  • at least a license plate information acquisition device such as a number can uniquely identify a vehicle. I just need it.
  • each component of each of the illustrated devices is functionally conceptual, and is not necessarily physically configured as illustrated. Is not required. That is, the specific form of the distribution / integration of each device is not limited to the one shown in the figure.
  • the vehicle tracking unit 43 and the vehicle identification information transmission unit 44 are integrated, or the collation unit 53 and the transmission unit 54 are integrated. All or a part of them can be configured to be functionally or physically distributed and integrated in arbitrary units according to various loads and usage conditions.
  • each processing function performed by each device can be realized by all or any partial power CPU and a program that is analyzed and executed by the CPU, or can be realized as hardware by wired logic. . [0126] (7) License plate information acquisition program
  • FIG. 18 is a diagram illustrating a computer that executes a license plate information acquisition program.
  • the computer 130 as the license plate information acquisition device includes a front camera 131, a rear camera 132, a fish-eye lens camera 133, a CPU 134, a ROM 135, an HDD 136, a RAM 137, and an output antenna 138, a bus 139, etc. Connected and configured.
  • the ROM 135 has a license plate information acquisition program that performs the same function as the license plate information acquisition device 10 shown in the first embodiment, that is, as shown in FIG. 18, a front vehicle detection processing program. 135a, front license plate recognition program 135b, front license plate information reading program 135c, vehicle tracking program 135d, vehicle identification information transmission program 135e, rear vehicle detection processing program 135f, and rear license plate recognition program 135g, rear license plate information reading program 135h, association processing program 135i, collation program 135j, and transmission program 135k are stored in advance. Note that these programs 135a to 135k may be appropriately integrated or distributed in the same manner as each component of the license plate information acquisition apparatus 10 shown in FIG.
  • the CPU 134 power reads out these programs 135a to 135k from the ROM 135 and executes them, so that each program 135a to 135k becomes the front vehicle detection processing process 134a, the front license plate, as shown in FIG. Recognition process 134b, front license plate information reading process 134c, vehicle tracking process 134d, vehicle identification information transmission process 134 e, rear vehicle detection processing process 134f, rear license plate recognition process 134g, rear license plate information reading process 134h It functions as an auxiliary process 134i, a verification process 134j, and a transmission process 134k.
  • Each process 134a-134 k represents the front vehicle detection processing unit 25, the front license plate recognition unit 26, the front license plate information reading unit 27, the vehicle tracking unit 43, the vehicle identification information transmission unit 44, and the rear vehicle detection process shown in FIG. It corresponds to the unit 35, the rear license plate recognition unit 36, the rear license plate information reading unit 37, the correspondence processing unit 52, the collation unit 53, and the transmission unit 54.
  • the HDD 136 has a front image data 136a, a front license plate image data 136b, a front license plate information table 136c, a monitoring image data 136d, and a rear image data.
  • 136e, rear license plate image data 136f, rear license plate information table 136g, and front and rear license plate information table 136h are provided.
  • the front and rear license plate information table 136h includes the front image temporary storage unit 22, the front license plate image storage unit 23, the front license plate information storage unit 24, the monitoring image storage unit 42, and the like shown in FIG.
  • the rear image temporary storage unit 32, the rear license plate image storage unit 33, the rear license plate information storage unit 34, and the front and rear license plate information storage unit 51 respectively correspond.
  • the CPU 134 reads the front image data 136a, the front license plate image data 136b, the front license plate information table 136c, the monitoring image data 136d, the rear image data 136e, the rear license plate image data 136f, Front license plate information table 136g and front and rear license plate information table 136h, front image data 1 37a, front license plate image data 137b, front license plate information table 137c, monitoring image data 137d, rear image data 137e, Rear license plate image data 137f, rear license plate information table 137g and front and rear license plate information table 137h are read out and stored in RAM 137.
  • Front image data 137a Front license plate image data 137b stored in RAM 137, Front number plate information table 137c, surveillance image data Vehicle tracking and front license plate number 137d, rear image data 137e, rear number plate image data 137f, rear license plate information table 137g and front rear license plate information table 137h. Generates rate information, etc.
  • the above programs 135a to 135k are not necessarily stored in the ROM 135 from the beginning.
  • a flexible disk (FD), a CD-ROM, an MO disk, or a DVD inserted into the computer 130.
  • "Portable physical media” such as disks, magneto-optical disks, IC cards, etc., or "fixed physical media” such as HDDs installed inside and outside the computer 130, as well as public lines, the Internet, LAN, WAN, etc.
  • Each program may be stored in “another computer (or server)” connected to the computer 130 via the computer 130, and the computer 130 may read each program and execute the program.
  • the license plate information acquisition device, the license plate information acquisition method, and the license plate information acquisition program according to the present invention are displayed on the front license plate of the vehicle passing through the front point. It is useful for acquiring part number plate information and obtaining rear part number plate information displayed on the rear part number plate of a vehicle passing through a rear point and associating the front part number plate information with the rear part number plate information. In particular, it is suitable for consistently associating the front and rear license plate information as those of the same vehicle without being influenced by the movement of the vehicle.

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Abstract

L'invention porte sur un dispositif d'acquisition d'informations sur les plaques d'immatriculation de véhicules passant par un point de détection et fournies par un détecteur de véhicules tel qu'une caméra. Le dispositif, suit le véhicule en maintenant la recherche d'information jusqu'à ce qu'il passe d'un point avant à un point arrière et enregistre l'information acquise par la caméra et l'information d'identification correspondante et les conserve jusqu'à ce que le véhicule passe le point arrière, puis compare les informations d'identification de la plaque avant et de la plaque arrière, qui, si elles correspondent, fournissent l'identification du véhicule.
PCT/JP2006/326143 2006-07-18 2006-12-27 Dispositif, procédé et programme d'acquisition d'informations sur des plaques d'immatriculation WO2008010308A1 (fr)

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JP2008525782A JPWO2008010308A1 (ja) 2006-07-18 2006-12-27 ナンバープレート情報取得装置およびナンバープレート情報取得方法

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Cited By (7)

* Cited by examiner, † Cited by third party
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JP2014130435A (ja) * 2012-12-28 2014-07-10 Fujitsu Ltd 情報処理装置及び方法
JP2015064752A (ja) * 2013-09-25 2015-04-09 株式会社東芝 車両監視装置、および車両監視方法
WO2017055251A1 (fr) * 2015-09-29 2017-04-06 Jenoptik Robot Gmbh Procédé et dispositif pour prouver une infraction commise par un véhicule passant par une zone de détection d'un dispositif de poursuite d'objet
JP2017084417A (ja) * 2017-02-02 2017-05-18 株式会社東芝 車両監視装置、および車両監視方法
JP2019061506A (ja) * 2017-09-27 2019-04-18 沖電気工業株式会社 移動体認識装置、プログラムおよび移動体認識システム
IT201900004573A1 (it) * 2019-03-27 2020-09-27 Autostrade Tech S P A Sistema e metodo per determinare tempi di permanenza di veicoli all'interno di un'area
JP2022129227A (ja) * 2021-02-24 2022-09-05 三菱重工機械システム株式会社 ナンバープレート読取装置

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014130435A (ja) * 2012-12-28 2014-07-10 Fujitsu Ltd 情報処理装置及び方法
JP2015064752A (ja) * 2013-09-25 2015-04-09 株式会社東芝 車両監視装置、および車両監視方法
WO2017055251A1 (fr) * 2015-09-29 2017-04-06 Jenoptik Robot Gmbh Procédé et dispositif pour prouver une infraction commise par un véhicule passant par une zone de détection d'un dispositif de poursuite d'objet
JP2017084417A (ja) * 2017-02-02 2017-05-18 株式会社東芝 車両監視装置、および車両監視方法
JP2019061506A (ja) * 2017-09-27 2019-04-18 沖電気工業株式会社 移動体認識装置、プログラムおよび移動体認識システム
IT201900004573A1 (it) * 2019-03-27 2020-09-27 Autostrade Tech S P A Sistema e metodo per determinare tempi di permanenza di veicoli all'interno di un'area
JP2022129227A (ja) * 2021-02-24 2022-09-05 三菱重工機械システム株式会社 ナンバープレート読取装置

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