WO2008117990A1 - A system and method for photographing the car - Google Patents

A system and method for photographing the car Download PDF

Info

Publication number
WO2008117990A1
WO2008117990A1 PCT/KR2008/001707 KR2008001707W WO2008117990A1 WO 2008117990 A1 WO2008117990 A1 WO 2008117990A1 KR 2008001707 W KR2008001707 W KR 2008001707W WO 2008117990 A1 WO2008117990 A1 WO 2008117990A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
sensing unit
camera
sensed
sensing
Prior art date
Application number
PCT/KR2008/001707
Other languages
French (fr)
Inventor
Soon Hyun Ahn
Original Assignee
Rexgen
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 Rexgen filed Critical Rexgen
Publication of WO2008117990A1 publication Critical patent/WO2008117990A1/en

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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
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • G08G1/054—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
    • 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
    • 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
    • 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
    • G08G1/056—Detecting movement of traffic to be counted or controlled with provision for distinguishing direction of travel

Definitions

  • the present invention relates to a system and a method for photographing a vehicle. More specifically, the present invention relates to a system for photographing a number plate and a loading portion of a running vehicle efficiently and precisely. [BACKGROUND ART]
  • Cameras are installed on roads for vehicles to check and catch illegal vehicles committing overspeeding, center line violation and the like. Recently, cameras have been used to apply exclusive bus lane violation, moving violation, loading violation and parking violation.
  • a camera 2 is installed beyond a vehicle moving direction along lanes and the camera 2 may photograph a picture of a front of the running vehicle.
  • a sensing unit 4 is provided in front of the camera 2 and the sensing unit 4 generates an operational signal of the camera 2 for the camera to photograph a number plate and a loading portion of the running vehicle.
  • the conventional photographing system has following problems. As shown in FIGS. 2 and 3, if a driver of a vehicle running along a lane of a road recognizes a position of the camera 2 and drives, passing a center line to avoid the camera 2, a number plate of the vehicle might not be photographed precisely. In addition, a speed of each running vehicle is different and as a result it is quite difficult to photograph a loading portion of a vehicle as well as a number plate. Especially, if the vehicle is driving over a center line of the road, the photographing is getting more and more difficult.
  • an object of the present invention is to provide a system and a method for photographing a vehicle, which is capable of precisely photograph a number plate and a loading portion of a vehicle even when a vehicle is running in a reverse direction across a center line.
  • Another object is to provide a system and a method for photographing a vehicle, which is capable of precisely recognizing as well as photographing a number plate and a loading portion of a vehicle in spite of a speed of a vehicle.
  • a system for photographing a vehicle includes a first camera to photograph a vehicle along a road, the road where a vehicle runs in a forward direction and a reverse direction; a second camera to photograph a vehicle running along the road in the reverse direction; a first sensing part to sense motion of the vehicle running along the road in the forward direction; a second sensing part to sense motion of the vehicle running along the road in the reverse direction; and a controlling part to control an operation of the first camera or the second camera by using a signal sensed at the first sensing part and the second sensing part.
  • the first sensing part may be configured of a 1-1 sensing unit and a 1-2 sensing unit provided in order according to a moving direction of the vehicle running along the road in the forward direction, the 1-1 sensing unit and the 1-2 sensing unit spaced apart a predetermined distance.
  • the second sensing part may be configured of a 2-1 sensing unit and a 2-2 sensing unit having a predetermined distance provided in order according to a moving direction of the vehicle running along the road in the reverse direction.
  • the system may further include a third sensing part to sense a vehicle running along a center line of the road.
  • the first camera may be operated to photograph the vehicle, if a front of the vehicle running along the road is sensed by the 1-1 sensing unit.
  • the first camera may be operated to photograph the vehicle, if a front of the vehicle is sensed by the 1-2 sensing unit and a rear of the vehicle is sensed by the 1-1 sensing unit.
  • the first camera may be operated to photograph the vehicle, if the rear of the vehicle is sensed by the 1-2 sensing unit.
  • the second camera my be operated to photograph the vehicle, if the vehicle running along the road abnormally moves in the reverse direction and a front of the vehicle is sensed by the 2-1 sensing unit and a rear of the vehicle is sensed by the 2-2 sensing unit.
  • a method for photographing a vehicle includes operating a camera to photograph a first frame of a front of a vehicle if a vehicle running along a lane of a road is sensed by a 1-1 sensing unit installed at the lane; operating the camera to photograph a second frame of a loading portion of the vehicle if the front of the vehicle is sensed by a 2-1 sensing unit installed at the lane and a rear of the vehicle is sensed by the 1-1 sensing unit; and operating the camera to photograph a third frame of the loading portion of the vehicle if the rear of the vehicle is sensed by the 1- 2 sensing unit.
  • a method for photographing a vehicle may include determining that a vehicle is running abnormally in a reverse direction, if a front of a vehicle is sensed by a 2-2 sensing unit installed at a lane, the vehicle running in a reverse direction across a center line abnormally from running along the lane normally; operating a camera to photograph a first frame of a loading portion of the vehicle if the front of the vehicle is sensed by a 2-1 sensing unit installed at the lane and a rear of the vehicle is sensed by the 2-2 sensing unit; operating a camera to photograph a second frame of the loading portion of the vehicle, if the rear of the vehicle is sensed by the 2-1 sensing unit; and operating a camera to photograph a third frame of the rear of the vehicle, if the vehicle is not sensed by the 2-1 sensing unit and the 2-2 sensing unit.
  • a method for photographing a vehicle may include operating a camera to photograph a first frame of a front of a vehicle, if a front of a vehicle running along alone is sensed by a 2-1 sensing unit installed at a lane; operating a camera to photograph a second frame of a loading potion of a vehicle, if a front of a vehicle is sensed by a 2-2 sensing unit installed at the lane and a rear of a vehicle is sensed by the 2-1 sensing unit; and operating a camera to photograph a third frame of a loading portion of a vehicle, if the rear of the vehicle is sensed by the 2-2 sensing unit.
  • a method for photographing a vehicle may include determining that a vehicle is running abnormally in a reverse direction, if a rear of a vehicle is sensed by a 1-2 sensing unit installed at a lane, the vehicle running in a reverse direction across a center line abnormally from running along the lane normally; operating a camera to photograph a first frame of a loading portion of the vehicle, if a front of the vehicle is sensed by a 1-1 sensing unit and the rear of the vehicle is sensed by the 1-2 sensing unit; operating the camera to photograph a second frame of the loading portion of the vehicle, if the rear of the vehicle is sensed by the 1-1 sensing unit; operating the camera to photograph a third frame of the rear of the vehicle, if the vehicle is not sensed by the 1-1 sensing unit and the 1-2 sensing unit.
  • a method for photographing a vehicle may include sensing a vehicle running along a lane of a road by using a sensing unit installed at a lane; determining whether the vehicle is running normally in or abnormally in a reverse direction, if the vehicle is sensed by the sensing unit; photographing plural frames of the vehicle at a predetermined speed, sensing the vehicle simultaneously; and developing a predetermined frame from the photographed images according to a speed of the vehicle.
  • a method for photographing a vehicle may include sensing a vehicle running along a lane by using a sensing unit; photographing plural frames of the vehicle at a predetermined speed, sensing the vehicle simultaneously; developing a predetermined frame from the photographed images according to a speed of the vehicle; and determining based on the frame whether the vehicle is running normally or abnormally in a reverse direction.
  • the method may further include recognizing a number of the vehicle by using the image of the frame photographed firstly, if it is determined that the vehicle is running normally.
  • the method may further include recognizing a number of the vehicle by using the image of the frame photographed lastly, if it is determined that the vehicle is running in a reverse direction abnormally.
  • a method for photographing a vehicle may include sensing a vehicle running along a lane by using a third sensing part installed at a lane; and operating the camera to photograph plural frames of the vehicle continuously.
  • a method for photograph a vehicle may include sensing a vehicle running along a lane by using a first sensing part and a second sensing part installed at a lane; and operating the camera to photograph plural frames of the vehicle continuously.
  • the sensing part may be configured of one of a loop coil type, high frequency type, laser type, ultrasonic wave type, image sensing type.
  • the method may further include storing the frames as a set in the controlling part.
  • a sensing part for sensing the motion of a vehicle is in communication with a camera in a predetermined pattern to photograph a vehicle running along a lane according to the present invention.
  • a number plate and a loading portion of a vehicle may be photographed precisely according to the present invention regardless of a vehicle normally running along a lane or a vehicle abnormally running in a reverse direction.
  • a number plate and a loading portion of a vehicle may be photographed precisely regardless of a speed of a vehicle, because the sensing part is in communication with the camera in a predetermined pattern as mentioned above.
  • FIG. 1 is a perspective view illustrating a conventional system for photographing a vehicle
  • FIG. 2 and FIG. 3 are a side view and a picture of an operational process to photograph a vehicle, respectively;
  • FIG. 4 is a perspective view illustrating a system for photographing a vehicle according to an exemplary embodiment of the present invention
  • FIG. 5 is a diagram illustrating an operational process for the system of FIG. 4 to photograph a vehicle that runs along a lane normally;
  • FIG. 6 is a diagram illustrating an operational process for the system of FIG. 4 to photograph a vehicle that runs past a center line illegally;
  • FIG. 7 is a plane view illustrating another embodiment of a system for photographing a vehicle
  • FIG. 8 is a diagram illustrating an example of a picture photographed by the system of FIG. 4.
  • FIG. 9 is a diagram illustrating an example of a picture photographed by the system of FIG. 6.
  • a system for photographing a vehicle includes a first camera 10, a second camera 12, a first sensing part 14, a second sensing part 16 and a controlling part 18.
  • the first camera 10 may photograph a vehicle running along a forward direction lane of a road which has at least two lanes in a forward and reverse direction.
  • the second camera 12 may photograph a vehicle running along a reverse direction lane of the road.
  • the first sensing part 14 may sense the motion of the vehicle running along the forward direction lane and the second sensing part 16 may sense the motion of the vehicle running along the reverse direction lane.
  • the controlling part 18 may controls an operation of the first camera 12 or the second camera 14 by using a signal sensed by the first sensing part 14 or the second sensing part 16.
  • the road may be varied and this embodiment presents a road having each lane in an opposite direction simply to explain the system for photographing a number plate according to the present invention.
  • a vehicle may run along each lane of the road and as shown in the drawings a single vehicle may run in a direction and another single vehicle may run in a reverse direction of the road with respect to a center line.
  • the camera 10 and 12 may be provided over the road and the camera 10 and 12 may be configured to photograph the vehicle running along each lane, for example, a number plate and a loading portion of the vehicle.
  • the camera 10 and 12 may be embodied in various ways, for example, IEEE 1394 camera.
  • a lighting unit (not shown) may be further provided in a predetermined portion near the camera 10 and 12 to allow the camera 10 and 12 to photograph a vehicle at night.
  • the camera 10 and 12 may be configured of an infrared camera that needs not any auxiliary lighting unit when photographing at night.
  • the camera 10 and 12 may be provided in pair to correspond to the number of the lanes of the road. Two cameras are provided in the present invention as the road has one lane in each direction according to this embodiment. However, if the number of the lanes increases, the number of the camera 10 and 12 may increase correspondingly.
  • the sensing part 14 and 16 may be provided on a portion of the road adjacent to a portion of the road corresponding to the camera.
  • the sensing part 14 and 16 is installed at each lane and the number of the sensing part 14 and 16 may be corresponding to that of the cameras 10 and 12. This is because the sensing part 14 and 16 senses the motion of the vehicle to transfer a sensing signal to the controlling part 18. Based on the signal, the operation of the camera 10 and 12 may be controlled.
  • the sensing part 14 and 16 may be configured as any means capable of sense a vehicle running along a lane of a road, for example, a loop coil type, high frequency type, laser type, ultrasonic wave type, image sensing type. As shown in FIG. 4, the sensing part 14 and 16 may be configured of a loop coil sensor in this embodiment.
  • the sensing parts 14 and 16 may be installed at both opposite lanes, respectively, corresponding to the camera 10 and 12. Since the road has two lanes in the embodiment of FIG. 4, the sensing part 14 and 16 may be configured of the first sensing part 14 and the second sensing part 16.
  • the first sensing part 14 may be installed at a moving way of the vehicle running along the forward direction. That is, as shown in FIG. 4, the first sensing part 14 may be installed at the lane where the vehicle is running from the left to the right. Similar to the first sensing part 14, the second sensing part 16 may be installed at the lane where the vehicle is running along a reverse direction. That is, as shown in FIG. 4, the second sensing part 16 may be installed at the lane where the vehicle is running from the right to the left.
  • the first and second sensing part 14 and 16 may be configured of two sensing units Tl, T2, T3 and T4, respectively, to sense a speed, a number plate and loads of each vehicle running along the lanes in both opposite directions at a time.
  • the sensing units may further provided, which will be described as follows.
  • the sensing unit of the first sensing part 14 may be configured of a 1-1 sensing unit Tl and a 1-2 sensing unit T2.
  • the 1-1 sensing unit Tl senses the vehicle running along the lane where the first camera 10 is installed primarily and the 1-2 sensing unit T2 senses next.
  • the sensing unit of the second sensing part 16 may be configured of a 2-1 sensing unit T3 and a 2-2 sensing unit T4, similar to the sensing unit of the first sensing part 14.
  • the 2-1 sensing unit senses the vehicle running along the lane where the second camera 12 is installed and the 2-2 sensing unit T4 senses next.
  • the controlling part 18 operates the first camera 10 to photograph the vehicle. At this time, the loading portion of the vehicle may be photographed (second frame). As shown in (c) of FIG.
  • the controlling part 18 operates the first camera 10 to photograph the car. At this time, the loading portion of the car is photographed (third frame).
  • the controlling part 18 recognizes the number of the car by using the first frame.
  • the second and third frame are resolved and memorized in the controlling part in a set together with the recognized number of the car or transferred to a server of the National police Agency. That is, they may be edited visually as shown in FIG.
  • vehicles may be categorized into vehicles for riding, vehicles for riding together, freight vehicles, special vehicles and two-wheeled vehicles. Also, vehicles may be categorized based on a size into light size, small size, middle size and full size vehicles. An overall length of all kinds of the vehicles except the two-wheeled vehicles is less than at least 3.5m and the least overall length of the actually running freight vehicle is 3.495m and the largest overall length is 12.6m.
  • a loading portion of the above vehicle may be photographed in the second frame or in the third frame.
  • the car running along the lane normally crosses the center line and runs in the reverse direction along the lane where the second camera 12 is installed.
  • the car is sensed by the 2-2 sensing unit T4 of the second sensing part 16.
  • the controlling part 18 determines that the car is running in the reverse direction, because the 2-2 sensing unit T4, not the 2-1 sensing unit 2-1, senses the motion of the car. As shown in (a) of FIG. 6, if a front of the car moving forward is sensed by the
  • the sensing of the front of the vehicle moving forward is off by the 2-1 sensing unit T3 and a rear of the vehicle is sensed by the 2-1 sensing unit T3.
  • the controlling part 18 operates the second camera 12 to photograph the car and at this time the loading portion of the vehicle is photographed (2 frame).
  • the controlling part 18 operates the second camera 12 to photograph the vehicle and a number plate at the rear of the vehicle is photographed (3 frame).
  • the frames (1, 2 and 3 frames) photographed in the above process may be transferred to the controlling part 18 again and they may be memorized in the controlling part.
  • the number of the vehicle may be recognized by the third frame image.
  • the first and second frames are resolved and stored in the controlling part in a set together with the recognized number or transferred to the server of the National police Agency.
  • the system for photographing a vehicle according to the present invention may be configured as shown in FIG. 7.
  • the third sensing part 20 may be installed at a portion of the center line below the corresponding camera 10 and 12, and a vehicle running along the center line not to be photographed by the first sensing part 14 and the second sensing part 16 is sensed by the third sensing part 20.
  • the controlling part determines to photograph the vehicle, if a driver of the vehicle finds the camera and tries to avoid the camera, running along the center line and the vehicle is sensed by the third sensing part 20 after sensed by either of the sensing units Tl and T2 of the first sensing part 14, and if the vehicle is sensed by the third sensing part 20 after sensed by either of the sensing units T3 and T4 of the second sensing part 18.
  • the controlling part determines to photograph the vehicle if the vehicle is sensed by only the third sensing part 20 and in any cases of abnormal sensing.
  • the controller 18 operates the camera 10 and 12 to photograph the vehicle continuously and the photographed images may be kept separately.
  • the camera 10 and 12 may photograph at a preset frame speed predetermined in the controlling part in advance if there is a first sensing in at least one of the sensing units Tl, T2, T3 and T4.
  • a frame speed may be preset at 20 frames per second in the controlling part 18 and if a signal is transferred from each of the sensing units Tl, T2, T3 and T4 the controlling part 18 performs steps of determining a normal direction and abnormal reverse direction.
  • the speed is sensed and compared with the photographed image and speed to calculate the speed of the vehicle. That is, 1st, 10th and 30th frame of the vehicle at a speed of 30KM/hour, 1 st , 7 th , 14 th frame at a speed of 100KM, 1 st , 3 rd , 5 th frame may be printed as shown in FIG. 8 if the vehicle is running in the normal direction and as shown in FIG.
  • plural frames may be photographed as predetermined to photograph a vehicle in 20 frames per second in the controlling part 18 and it may be determined based on information gained from the plural frames whether the vehicle is running in the normal direction or abnormal reverse direction.
  • the sensing part 14 and 16 for transferring the sensing signal to the controlling part 18 should be provided so that the camera 10 and 12 is operated. However, if the camera adapts a motion detection method, the sensing part 14 and 16 may not be provided.
  • the present invention has an industrial applicability.
  • a sensing part for sensing the motion of a vehicle is in communication with a camera in a predetermined pattern to photograph a vehicle running along a lane according to the present invention.
  • a number plate and a loading portion of a vehicle may be photographed precisely according to the present invention regardless of a vehicle normally running along a lane or a vehicle abnormally running in a reverse direction.
  • a number plate and a loading portion of a vehicle may be photographed precisely regardless of a speed of a vehicle, because the sensing part is in communication with the camera in a predetermined pattern as mentioned above.

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  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

A system and a method for photographing a vehicle is disclosed. A system includes a first camera to photograph a vehicle along a road, the road where a vehicle runs in a forward direction and a reverse direction, a second camera to photograph a vehicle running along the road in the reverse direction, a first sensing part to sense the motion of the vehicle running along the road in the forward direction, a second sensing part to sense the motion of the vehicle running along the road in the reverse direction; and a controlling part to control an operation of the first camera or the second camera by using a signal sensed at the first sensing part and the second sensing part, according to the present invention, a number plate and a loading portion of a vehicle may be photographed precisely regardless of a vehicle normally running along a lane or a vehicle abnormally running in a reverse direction and regardless of a speed of a vehicle, because the sensing part is in communication with the camera in a predetermined pattern as mentioned above.

Description

[DESCRIPTION] [TITLE OF INVENTION]
A SYSTEM AND METHOD FOR PHOTOGRAPHING THE CAR [TECHNICAL FIELD] The present invention relates to a system and a method for photographing a vehicle. More specifically, the present invention relates to a system for photographing a number plate and a loading portion of a running vehicle efficiently and precisely. [BACKGROUND ART]
Cameras are installed on roads for vehicles to check and catch illegal vehicles committing overspeeding, center line violation and the like. Recently, cameras have been used to apply exclusive bus lane violation, moving violation, loading violation and parking violation.
As shown in FIG. 1, according to an operational method of a conventional cameral, a camera 2 is installed beyond a vehicle moving direction along lanes and the camera 2 may photograph a picture of a front of the running vehicle. A sensing unit 4 is provided in front of the camera 2 and the sensing unit 4 generates an operational signal of the camera 2 for the camera to photograph a number plate and a loading portion of the running vehicle.
[DISCLOSURE OF INVENTION] [TECHNICAL PROBLEM]
However, the conventional photographing system has following problems. As shown in FIGS. 2 and 3, if a driver of a vehicle running along a lane of a road recognizes a position of the camera 2 and drives, passing a center line to avoid the camera 2, a number plate of the vehicle might not be photographed precisely. In addition, a speed of each running vehicle is different and as a result it is quite difficult to photograph a loading portion of a vehicle as well as a number plate. Especially, if the vehicle is driving over a center line of the road, the photographing is getting more and more difficult.
[TECHNICAL SOLUTION]
To solve the problems, an object of the present invention is to provide a system and a method for photographing a vehicle, which is capable of precisely photograph a number plate and a loading portion of a vehicle even when a vehicle is running in a reverse direction across a center line.
Another object is to provide a system and a method for photographing a vehicle, which is capable of precisely recognizing as well as photographing a number plate and a loading portion of a vehicle in spite of a speed of a vehicle.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a system for photographing a vehicle includes a first camera to photograph a vehicle along a road, the road where a vehicle runs in a forward direction and a reverse direction; a second camera to photograph a vehicle running along the road in the reverse direction; a first sensing part to sense motion of the vehicle running along the road in the forward direction; a second sensing part to sense motion of the vehicle running along the road in the reverse direction; and a controlling part to control an operation of the first camera or the second camera by using a signal sensed at the first sensing part and the second sensing part.
Here, the first sensing part may be configured of a 1-1 sensing unit and a 1-2 sensing unit provided in order according to a moving direction of the vehicle running along the road in the forward direction, the 1-1 sensing unit and the 1-2 sensing unit spaced apart a predetermined distance.
The second sensing part may be configured of a 2-1 sensing unit and a 2-2 sensing unit having a predetermined distance provided in order according to a moving direction of the vehicle running along the road in the reverse direction.
The system may further include a third sensing part to sense a vehicle running along a center line of the road.
The first camera may be operated to photograph the vehicle, if a front of the vehicle running along the road is sensed by the 1-1 sensing unit. The first camera may be operated to photograph the vehicle, if a front of the vehicle is sensed by the 1-2 sensing unit and a rear of the vehicle is sensed by the 1-1 sensing unit. The first camera may be operated to photograph the vehicle, if the rear of the vehicle is sensed by the 1-2 sensing unit.
The second camera my be operated to photograph the vehicle, if the vehicle running along the road abnormally moves in the reverse direction and a front of the vehicle is sensed by the 2-1 sensing unit and a rear of the vehicle is sensed by the 2-2 sensing unit.
The second camera may be operated to photograph the vehicle, if the rear of the vehicle is sensed by the 2-1 sensing unit. The vehicle is not photographed if the vehicle is not sensed by the 2-1 sensing unit and the 2-2 sensing unit. In another aspect of the present invention, a method for photographing a vehicle includes operating a camera to photograph a first frame of a front of a vehicle if a vehicle running along a lane of a road is sensed by a 1-1 sensing unit installed at the lane; operating the camera to photograph a second frame of a loading portion of the vehicle if the front of the vehicle is sensed by a 2-1 sensing unit installed at the lane and a rear of the vehicle is sensed by the 1-1 sensing unit; and operating the camera to photograph a third frame of the loading portion of the vehicle if the rear of the vehicle is sensed by the 1- 2 sensing unit.
Further more, a method for photographing a vehicle may include determining that a vehicle is running abnormally in a reverse direction, if a front of a vehicle is sensed by a 2-2 sensing unit installed at a lane, the vehicle running in a reverse direction across a center line abnormally from running along the lane normally; operating a camera to photograph a first frame of a loading portion of the vehicle if the front of the vehicle is sensed by a 2-1 sensing unit installed at the lane and a rear of the vehicle is sensed by the 2-2 sensing unit; operating a camera to photograph a second frame of the loading portion of the vehicle, if the rear of the vehicle is sensed by the 2-1 sensing unit; and operating a camera to photograph a third frame of the rear of the vehicle, if the vehicle is not sensed by the 2-1 sensing unit and the 2-2 sensing unit.
Still further, a method for photographing a vehicle may include operating a camera to photograph a first frame of a front of a vehicle, if a front of a vehicle running along alone is sensed by a 2-1 sensing unit installed at a lane; operating a camera to photograph a second frame of a loading potion of a vehicle, if a front of a vehicle is sensed by a 2-2 sensing unit installed at the lane and a rear of a vehicle is sensed by the 2-1 sensing unit; and operating a camera to photograph a third frame of a loading portion of a vehicle, if the rear of the vehicle is sensed by the 2-2 sensing unit. Still further, a method for photographing a vehicle may include determining that a vehicle is running abnormally in a reverse direction, if a rear of a vehicle is sensed by a 1-2 sensing unit installed at a lane, the vehicle running in a reverse direction across a center line abnormally from running along the lane normally; operating a camera to photograph a first frame of a loading portion of the vehicle, if a front of the vehicle is sensed by a 1-1 sensing unit and the rear of the vehicle is sensed by the 1-2 sensing unit; operating the camera to photograph a second frame of the loading portion of the vehicle, if the rear of the vehicle is sensed by the 1-1 sensing unit; operating the camera to photograph a third frame of the rear of the vehicle, if the vehicle is not sensed by the 1-1 sensing unit and the 1-2 sensing unit. Still further, a method for photographing a vehicle may include sensing a vehicle running along a lane of a road by using a sensing unit installed at a lane; determining whether the vehicle is running normally in or abnormally in a reverse direction, if the vehicle is sensed by the sensing unit; photographing plural frames of the vehicle at a predetermined speed, sensing the vehicle simultaneously; and developing a predetermined frame from the photographed images according to a speed of the vehicle.
Still further, a method for photographing a vehicle may include sensing a vehicle running along a lane by using a sensing unit; photographing plural frames of the vehicle at a predetermined speed, sensing the vehicle simultaneously; developing a predetermined frame from the photographed images according to a speed of the vehicle; and determining based on the frame whether the vehicle is running normally or abnormally in a reverse direction.
The method may further include recognizing a number of the vehicle by using the image of the frame photographed firstly, if it is determined that the vehicle is running normally. The method may further include recognizing a number of the vehicle by using the image of the frame photographed lastly, if it is determined that the vehicle is running in a reverse direction abnormally.
A method for photographing a vehicle may include sensing a vehicle running along a lane by using a third sensing part installed at a lane; and operating the camera to photograph plural frames of the vehicle continuously. A method for photograph a vehicle may include sensing a vehicle running along a lane by using a first sensing part and a second sensing part installed at a lane; and operating the camera to photograph plural frames of the vehicle continuously.
The sensing part may be configured of one of a loop coil type, high frequency type, laser type, ultrasonic wave type, image sensing type.
The method may further include storing the frames as a set in the controlling part. [ADVANTAGEOUS EFFECTS]
The present invention has following advantageous effects. A sensing part for sensing the motion of a vehicle is in communication with a camera in a predetermined pattern to photograph a vehicle running along a lane according to the present invention. As a result, a number plate and a loading portion of a vehicle may be photographed precisely according to the present invention regardless of a vehicle normally running along a lane or a vehicle abnormally running in a reverse direction.
Furthermore, a number plate and a loading portion of a vehicle may be photographed precisely regardless of a speed of a vehicle, because the sensing part is in communication with the camera in a predetermined pattern as mentioned above. [BRIEF DESCRIPTION OF THE DRAWINGS]
The accompanying drawings, which are included to provide further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure. In the drawings:
FIG. 1 is a perspective view illustrating a conventional system for photographing a vehicle; FIG. 2 and FIG. 3 are a side view and a picture of an operational process to photograph a vehicle, respectively;
FIG. 4 is a perspective view illustrating a system for photographing a vehicle according to an exemplary embodiment of the present invention;
FIG. 5 is a diagram illustrating an operational process for the system of FIG. 4 to photograph a vehicle that runs along a lane normally;
FIG. 6 is a diagram illustrating an operational process for the system of FIG. 4 to photograph a vehicle that runs past a center line illegally;
FIG. 7 is a plane view illustrating another embodiment of a system for photographing a vehicle; FIG. 8 is a diagram illustrating an example of a picture photographed by the system of FIG. 4; and
FIG. 9 is a diagram illustrating an example of a picture photographed by the system of FIG. 6.
[BEST MODE]
An exemplary embodiment of a system for photographing a number plate of a vehicle according to the present invention will be explained in reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. First of all, as shown in FIG. 4, a system for photographing a vehicle includes a first camera 10, a second camera 12, a first sensing part 14, a second sensing part 16 and a controlling part 18. The first camera 10 may photograph a vehicle running along a forward direction lane of a road which has at least two lanes in a forward and reverse direction. The second camera 12 may photograph a vehicle running along a reverse direction lane of the road. The first sensing part 14 may sense the motion of the vehicle running along the forward direction lane and the second sensing part 16 may sense the motion of the vehicle running along the reverse direction lane. The controlling part 18 may controls an operation of the first camera 12 or the second camera 14 by using a signal sensed by the first sensing part 14 or the second sensing part 16. First of all, the road may be varied and this embodiment presents a road having each lane in an opposite direction simply to explain the system for photographing a number plate according to the present invention.
A vehicle may run along each lane of the road and as shown in the drawings a single vehicle may run in a direction and another single vehicle may run in a reverse direction of the road with respect to a center line. Here, the camera 10 and 12 may be provided over the road and the camera 10 and 12 may be configured to photograph the vehicle running along each lane, for example, a number plate and a loading portion of the vehicle.
The camera 10 and 12 may be embodied in various ways, for example, IEEE 1394 camera. In addition, a lighting unit (not shown) may be further provided in a predetermined portion near the camera 10 and 12 to allow the camera 10 and 12 to photograph a vehicle at night. Alternatively, the camera 10 and 12 may be configured of an infrared camera that needs not any auxiliary lighting unit when photographing at night.
The camera 10 and 12 may be provided in pair to correspond to the number of the lanes of the road. Two cameras are provided in the present invention as the road has one lane in each direction according to this embodiment. However, if the number of the lanes increases, the number of the camera 10 and 12 may increase correspondingly.
The sensing part 14 and 16 may be provided on a portion of the road adjacent to a portion of the road corresponding to the camera. The sensing part 14 and 16 is installed at each lane and the number of the sensing part 14 and 16 may be corresponding to that of the cameras 10 and 12. This is because the sensing part 14 and 16 senses the motion of the vehicle to transfer a sensing signal to the controlling part 18. Based on the signal, the operation of the camera 10 and 12 may be controlled.
The sensing part 14 and 16 may be configured as any means capable of sense a vehicle running along a lane of a road, for example, a loop coil type, high frequency type, laser type, ultrasonic wave type, image sensing type. As shown in FIG. 4, the sensing part 14 and 16 may be configured of a loop coil sensor in this embodiment.
The sensing parts 14 and 16 may be installed at both opposite lanes, respectively, corresponding to the camera 10 and 12. Since the road has two lanes in the embodiment of FIG. 4, the sensing part 14 and 16 may be configured of the first sensing part 14 and the second sensing part 16.
The first sensing part 14 may be installed at a moving way of the vehicle running along the forward direction. That is, as shown in FIG. 4, the first sensing part 14 may be installed at the lane where the vehicle is running from the left to the right. Similar to the first sensing part 14, the second sensing part 16 may be installed at the lane where the vehicle is running along a reverse direction. That is, as shown in FIG. 4, the second sensing part 16 may be installed at the lane where the vehicle is running from the right to the left.
The first and second sensing part 14 and 16 may be configured of two sensing units Tl, T2, T3 and T4, respectively, to sense a speed, a number plate and loads of each vehicle running along the lanes in both opposite directions at a time. Of course, the sensing units may further provided, which will be described as follows.
First, the sensing unit of the first sensing part 14 may be configured of a 1-1 sensing unit Tl and a 1-2 sensing unit T2. The 1-1 sensing unit Tl senses the vehicle running along the lane where the first camera 10 is installed primarily and the 1-2 sensing unit T2 senses next.
The sensing unit of the second sensing part 16 may be configured of a 2-1 sensing unit T3 and a 2-2 sensing unit T4, similar to the sensing unit of the first sensing part 14. The 2-1 sensing unit senses the vehicle running along the lane where the second camera 12 is installed and the 2-2 sensing unit T4 senses next.
Next, a process will be explained in that the vehicle running along the road is sensed by the sensing part and that the vehicle is photographed by the camera.
First, a process in that the vehicle running along the lane normally is photographed will be described. The vehicle normally runs along the lane, not violating the center line and it is running along the lane where the first camera 10 is installed.
The vehicle is sensed by the 1-1 sensing unit Tl of the first sensing part 14 as moving along the lane. More specifically, as shown in (a) of FIG. 5, a front of the vehicle is sensed by the 1-1 sensing unit Tl and a sensing signal (Tl=On, T2=OFF) is transferred to the controlling part 18. The 1-1 sensing unit Tl and the 1-2 sensing unit T2 transfer the sensing signal (Tl=ON, T2=OFF) to the controlling part 18 and the controlling part 18 operates the first camera 10 to photograph the front of the vehicle (first frame). That is, an image including a number plate attached to the front of the vehicle is photographed by the first camera 10. Hence, as shown in (b) of FIG. 5, the front of the vehicle, as it is running forward, is sensed by the 1-2 sensing unit T2 and a rear of the vehicle is sensed by the 1-1 sensing unit Tl. The 1-1 sensing unit Tl and the 1-2 sensing unit T2 transfer a sensing signal (Tl=ON, T2=ON) to the controlling part 18. The controlling part 18 operates the first camera 10 to photograph the vehicle. At this time, the loading portion of the vehicle may be photographed (second frame). As shown in (c) of FIG. 5, if the sensing of the rear of the vehicle is canceled by the 1-1 sensing unit Tl and the rear of the vehicle is sensed by the 1-2 sensing unit T2 as the vehicle is moving forward, the 1-1 sensing unit Tl and the 1-2 sensing unit T2 transfer a sensing signal (Tl=OFF, T2=0N) to the controlling part 18. The controlling part 18 operates the first camera 10 to photograph the car. At this time, the loading portion of the car is photographed (third frame).
Especially, at this time, the controlling part 18 recognizes the number of the car by using the first frame. The second and third frame are resolved and memorized in the controlling part in a set together with the recognized number of the car or transferred to a server of the National Police Agency. That is, they may be edited visually as shown in FIG.
8.
In the process of photographing the loading portion of the car, two images of the first and second frame are photographed because the length of each car running along the road may be different. That is, vehicles may be categorized into vehicles for riding, vehicles for riding together, freight vehicles, special vehicles and two-wheeled vehicles. Also, vehicles may be categorized based on a size into light size, small size, middle size and full size vehicles. An overall length of all kinds of the vehicles except the two-wheeled vehicles is less than at least 3.5m and the least overall length of the actually running freight vehicle is 3.495m and the largest overall length is 12.6m.
As a result, a loading portion of the above vehicle may be photographed in the second frame or in the third frame.
Next, as shown in FIG. 6, a process will be explained in that the car running abnormally in the reverse direction across the center line out of normally running along the lane to avoid the photographing of the camera. On simple explanation sake, this embodiment presents that the car normally running along the lane with the first camera is moving along the lane with the second camera 12 across the center line to avoid the first camera 10.
The car running along the lane normally crosses the center line and runs in the reverse direction along the lane where the second camera 12 is installed. As moving along the lane where the second camera 12 is installed, the car is sensed by the 2-2 sensing unit T4 of the second sensing part 16. At this time, the controlling part 18 determines that the car is running in the reverse direction, because the 2-2 sensing unit T4, not the 2-1 sensing unit 2-1, senses the motion of the car. As shown in (a) of FIG. 6, if a front of the car moving forward is sensed by the
2-1 sensing unit T3 and a rear of the car is sensed by the 2-2 sensing unit T4, the 2-1 sensing unit T3 and the 2-2 sensing unit T4 transfer a sensing signal (T3=ON, T4=ON) to the controlling part 18. The 2-2 sensing unit T4 transfers the sensing signal (T3=ON, T4=ON) to the controlling part 18 and the controlling part 18 operates the second camera 12 to photograph a loading portion of the vehicle in a rear direction of the vehicle (1 frame).
As shown in (b) of FIG. 6, the sensing of the front of the vehicle moving forward is off by the 2-1 sensing unit T3 and a rear of the vehicle is sensed by the 2-1 sensing unit T3. Hence, the 2-1 sensing unit T3 and the 2-2 sensing unit T4 transfer the sensing signal (T3=ON, T4=OFF) to the controlling part 18. The controlling part 18 operates the second camera 12 to photograph the car and at this time the loading portion of the vehicle is photographed (2 frame).
As shown in (C) of FIG. 6, if the sensing of the rear of the vehicle moving forward continuously is off by the 2-1 sensing unit T3, the 2-1 sensing unit T3 and the 2-2 sensing unit T4 generate and transfer a sensing signal (T3=OFF, T4=OFF). The controlling part 18 operates the second camera 12 to photograph the vehicle and a number plate at the rear of the vehicle is photographed (3 frame).
The frames (1, 2 and 3 frames) photographed in the above process, for example, images shown in FIG. 9 may be transferred to the controlling part 18 again and they may be memorized in the controlling part. Here, the number of the vehicle may be recognized by the third frame image. The first and second frames are resolved and stored in the controlling part in a set together with the recognized number or transferred to the server of the National Police Agency.
The system for photographing a vehicle according to the present invention may be configured as shown in FIG. 7.
In the system of FIG. 7, basic elements are identical to those of the embodiment shown in FIG. 4 except a third sensing part 20. The third sensing part 20 may be installed at a portion of the center line below the corresponding camera 10 and 12, and a vehicle running along the center line not to be photographed by the first sensing part 14 and the second sensing part 16 is sensed by the third sensing part 20.
Specifically, the controlling part determines to photograph the vehicle, if a driver of the vehicle finds the camera and tries to avoid the camera, running along the center line and the vehicle is sensed by the third sensing part 20 after sensed by either of the sensing units Tl and T2 of the first sensing part 14, and if the vehicle is sensed by the third sensing part 20 after sensed by either of the sensing units T3 and T4 of the second sensing part 18. Of course, the controlling part determines to photograph the vehicle if the vehicle is sensed by only the third sensing part 20 and in any cases of abnormal sensing.
As shown in FIG. 7, if the abnormal sensing signal is generated described above as the vehicle is moving forward, for example, the sensing signal is distinguishably different from a pattern of the sensing signal memorized in the controlling part 18, the controller 18 operates the camera 10 and 12 to photograph the vehicle continuously and the photographed images may be kept separately.
Unlike the above embodiment, the camera 10 and 12 may photograph at a preset frame speed predetermined in the controlling part in advance if there is a first sensing in at least one of the sensing units Tl, T2, T3 and T4.
For example, a frame speed may be preset at 20 frames per second in the controlling part 18 and if a signal is transferred from each of the sensing units Tl, T2, T3 and T4 the controlling part 18 performs steps of determining a normal direction and abnormal reverse direction. As the vehicle is moving forward, the speed is sensed and compared with the photographed image and speed to calculate the speed of the vehicle. That is, 1st, 10th and 30th frame of the vehicle at a speed of 30KM/hour, 1st, 7th, 14th frame at a speed of 100KM, 1st, 3rd, 5th frame may be printed as shown in FIG. 8 if the vehicle is running in the normal direction and as shown in FIG. 9 if the vehicle is running in the abnormal reverse direction. Alternatively, plural frames may be photographed as predetermined to photograph a vehicle in 20 frames per second in the controlling part 18 and it may be determined based on information gained from the plural frames whether the vehicle is running in the normal direction or abnormal reverse direction.
The sensing part 14 and 16 for transferring the sensing signal to the controlling part 18 should be provided so that the camera 10 and 12 is operated. However, if the camera adapts a motion detection method, the sensing part 14 and 16 may not be provided.
Unlike the above embodiment, a single sensing unit Tl and T3 may be provided in the sensing part 14 and 16 for transferring the sensing signal to the controlling part in order to operate the camera 10 and 12. That is, the single sensing unit Tl and T3 may be provided unlike the embodiment of FIG. 4. as a result, if the vehicle running along the lane with the camera 10 and 12 contacts with the sensing unit Tl and T3, the sensing unit Tl and T3 transfers a sensing signal (Tl=ON or T3=ON) to the controlling part 18. Hence, the controlling part 18 controls the camera 10 and 12 to photograph the vehicle continuously. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
[INDUSTRIAL APPLICABILITY]
The present invention has an industrial applicability.
A sensing part for sensing the motion of a vehicle is in communication with a camera in a predetermined pattern to photograph a vehicle running along a lane according to the present invention. As a result, a number plate and a loading portion of a vehicle may be photographed precisely according to the present invention regardless of a vehicle normally running along a lane or a vehicle abnormally running in a reverse direction.
Furthermore, a number plate and a loading portion of a vehicle may be photographed precisely regardless of a speed of a vehicle, because the sensing part is in communication with the camera in a predetermined pattern as mentioned above.

Claims

[CLAIMS]
1. A system for photographing a vehicle comprising: a first camera to photograph a vehicle along a road, the road where a vehicle runs in a forward direction and a reverse direction; a second camera to photograph a vehicle running along the road in the reverse direction; a first sensing part to sense the motion of the vehicle running along the road in the forward direction; a second sensing part to sense the motion of the vehicle running along the road in the reverse direction; and a controlling part to control an operation of the first camera or the second camera by using a signal sensed at the first sensing part and the second sensing part.
2. The system as claimed in claim 1, wherein the first sensing part is configured of a 1-1 sensing unit and a 1-2 sensing unit provided in order according to a moving direction of the vehicle running along the road in the forward direction, the 1-1 sensing unit and the 1-2 sensing unit spaced apart a predetermined distance.
3. The system as claimed in claim 1 or 2, wherein the second sensing part is configured of a 2-1 sensing unit and a 2-2 sensing unit provided in order according to a moving direction of the vehicle running along the road in the reverse direction, the 2-1 sensing part and the 2-2 sensing part spaced apart a predetermined distance.
4. The system as claimed in claim 3, further comprising a third sensing part to sense a vehicle running along a center line of the road.
5. The system as claimed in claim 2, wherein the first camera is operated to photograph the vehicle, if a front of the vehicle running along the road is sensed by the 1-1 sensing unit, further wherein the first camera is operated to photograph the vehicle, if a front of the vehicle is sensed by the 1-2 sensing unit and a rear of the vehicle is sensed by the 1-1 sensing unit, further wherein the first camera is operated to photograph the vehicle, if the rear of the vehicle is sensed by the 1-2 sensing unit.
6. The system as claimed in claim 3, wherein the second camera is operated to photograph the vehicle, if the vehicle running along the road abnormally moves in the reverse direction and a front of the vehicle is sensed by the 2-1 sensing unit and a rear of the vehicle is sensed by the 2-2 sensing unit, further wherein the second camera is operated to photograph the vehicle, if the rear of the vehicle is sensed by the 2-1 sensing unit, further wherein the vehicle is not photographed if the vehicle is not sensed by the 2-1 sensing unit and the 2-2 sensing unit.
7. A method for photographing a vehicle comprising: operating a camera to photograph a first frame of a front of a vehicle if a vehicle running along a lane of a road is sensed by a 1-1 sensing unit installed at the lane; operating the camera to photograph a second frame of a loading portion of the vehicle if the front of the vehicle is sensed by a 2-1 sensing unit installed at the lane and a rear of the vehicle is sensed by the 1-1 sensing unit; and operating the camera to photograph a third frame of the loading portion of the vehicle if the rear of the vehicle is sensed by the 1-2 sensing unit.
8. A method for photographing a vehicle comprising: determining that a vehicle is running abnormally in a reverse direction, if a front of a vehicle is sensed by a 2-2 sensing unit installed at a lane, the vehicle running in a reverse direction across a center line abnormally from running along the lane normally; operating a camera to photograph a first frame of a loading portion of the vehicle if the front of the vehicle is sensed by a 2-1 sensing unit installed at the lane and a rear of the vehicle is sensed by the 2-2 sensing unit; operating a camera to photograph a second frame of the loading portion of the vehicle, if the rear of the vehicle is sensed by the 2-1 sensing unit; and operating a camera to photograph a third frame of the rear of the vehicle, if the vehicle is not sensed by the 2-1 sensing unit and the 2-2 sensing unit.
9. A method for photographing a vehicle comprising: operating a camera to photograph a first frame of a front of a vehicle, if a front of a vehicle running along alone is sensed by a 2-1 sensing unit installed at a lane; operating a camera to photograph a second frame of a loading potion of a vehicle, if a front of a vehicle is sensed by a 2-2 sensing unit installed at the lane and a rear of a vehicle is sensed by the 2-1 sensing unit; and operating a camera to photograph a third frame of a loading portion of a vehicle, if the rear of the vehicle is sensed by the 2-2 sensing unit.
10. A method for photographing a vehicle comprising: determining that a vehicle is running abnormally in a reverse direction, if a rear of a vehicle is sensed by a 1 -2 sensing unit installed at a lane, the vehicle running in a reverse direction across a center line abnormally from running along the lane normally; operating a camera to photograph a first frame of a loading portion of the vehicle, if a front of the vehicle is sensed by a 1-1 sensing unit and the rear of the vehicle is sensed by the 1-2 sensing unit; operating the camera to photograph a second frame of the loading portion of the vehicle, if the rear of the vehicle is sensed by the 1-1 sensing unit; operating the camera to photograph a third frame of the rear of the vehicle, if the vehicle is not sensed by the 1-1 sensing unit and the 1-2 sensing unit.
11. A method for photographing a vehicle comprising: sensing a vehicle running along a lane of a road by using a sensing unit installed at a lane; determining whether the vehicle is running normally in or abnormally in a reverse direction, if the vehicle is sensed by the sensing unit; photographing plural frames of the vehicle at a predetermined speed, sensing the vehicle simultaneously; and developing a predetermined frame from the photographed images according to a speed of the vehicle.
12. A method for photographing a vehicle comprising: sensing a vehicle running along a lane by using a sensing unit; photographing plural frames of the vehicle at a predetermined speed, sensing the vehicle simultaneously; developing a predetermined frame from the photographed images according to a speed of the vehicle; and determining based on the frame whether the vehicle is running normally or abnormally in a reverse direction.
13. The method as claimed in one of claims 7, 9, 11 and 12, further comprising: recognizing a number of the vehicle by using the image of the frame photographed firstly, if it is determined that the vehicle is running normally.
14. The method as claimed in one of claims 8, 10, 11 and 12, further comprising: recognizing a number of the vehicle by using the image of the frame photographed lastly, if it is determined that the vehicle is running in a reverse direction abnormally.
15. A method for photographing a vehicle comprising: sensing a vehicle running along a lane by using a third sensing part installed at a lane; and operating the camera to photograph plural frames of the vehicle continuously.
16. A method for photograph a vehicle comprising: sensing a vehicle running along a lane by using a first sensing part and a second sensing part installed at a lane; and operating the camera to photograph plural frames of the vehicle continuously.
17. The method as claimed in claim 1, wherein the sensing part is configured of one of a loop coil type, high frequency type, laser type, ultrasonic wave type, image sensing type.
18. The method as claimed in claim 7, 8, 9, 10, 11, 12, 15 and 16, further comprising: memorizing the frames in the controlling part as a set.
PCT/KR2008/001707 2007-03-27 2008-03-27 A system and method for photographing the car WO2008117990A1 (en)

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