KR101849366B1 - Method and system for controlling traffic lights - Google Patents

Method and system for controlling traffic lights Download PDF

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Publication number
KR101849366B1
KR101849366B1 KR1020110035152A KR20110035152A KR101849366B1 KR 101849366 B1 KR101849366 B1 KR 101849366B1 KR 1020110035152 A KR1020110035152 A KR 1020110035152A KR 20110035152 A KR20110035152 A KR 20110035152A KR 101849366 B1 KR101849366 B1 KR 101849366B1
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South Korea
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traffic light
lane
road
traffic
image
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KR1020110035152A
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Korean (ko)
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KR20120117410A (en
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김정현
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한화테크윈 주식회사
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Abstract

A traffic light control method and system for controlling a traffic light for each road in a road intersection area is disclosed. A traffic light control method according to an embodiment of the present invention includes steps (a) to (d). In step (a), a road area having a set distance from the road intersection area with respect to each road is photographed. In step (b), the image frame of the road area is divided into lanes of the road area, and each lane of the image frame is divided into a plurality of sections. In step (c), it is determined whether there is a vehicle image in each of a plurality of sections for each lane in the image frame, and the degree of vehicle congestion for each lane is determined. In step (d), the traffic lights for the respective roads are controlled in accordance with the lane marking degree determined for each road.

Description

TECHNICAL FIELD [0001] The present invention relates to a traffic light control method and system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic light control method and system, and more particularly, to a traffic light control method and system for controlling a traffic light for each road in a road crossing area.

A traffic light control system for controlling a traffic light for each road in a road intersection area, the traffic light is periodically turned on at a predetermined time interval.

According to such a conventional traffic signal light control system, traffic signals can not be flexibly controlled according to the degree of traffic congestion on each road.

Of course, traffic police can manually control traffic crossing areas where traffic congestion is predicted during commute time, but this is controlled by subjective judgment of traffic police. Therefore, it is difficult to precisely control the degree of stagnation of the vehicle by the lane.

An embodiment of the present invention is to provide a traffic light control method and system that can efficiently control the traffic light by automatically grasping the degree of traffic congestion by lane.

According to an aspect of the present invention, there is provided a traffic light control method for controlling a traffic light for each road in a road intersection area, the method including steps (a) to (d).

In step (a), a road area having a set distance from the road intersection area is photographed for each of the roads.

In step (b), an image frame of the road area is divided into lanes of the road area, and each lane of the image frame is divided into a plurality of sections.

In step (c), it is determined whether the vehicle image is present in each of the plurality of sections of each lane in the image frame, and the degree of vehicle congestion of each lane is determined.

In step (d), the traffic lights for the respective roads are controlled according to the lane marking degree of each lane determined for each road.

On the other hand, the lanes in the steps (b) to (d) may include a left-turn lane and a straight lane.

Further, at least one of the left-turn lane and the straight lane in the steps (b) to (d) may include a plurality of lanes.

According to another aspect of the present invention, there is provided a traffic light control system having a traffic light controller for each traffic crossing area, the traffic light control system comprising: Cameras for photographing a road area having an excavation area may be further provided.

The image frame of the road area is divided into lanes of the road area, and each lane of the image frame is divided into a plurality of sections.

The cameras may detect whether a vehicle image exists in each of a plurality of sections of each lane in the image frame, and may transmit detection result information to each of the traffic light controllers.

Each of the traffic light lamp controllers determines the degree of vehicle congestion for each lane according to the detection result information from the cameras, and determines the degree of vehicle congestion for each lane according to the determined degree of lane- Can control the traffic light for Korea.

Each of the cameras may include a video signal generator, a video signal processor, a communication interface, and an image analyzer.

The video signal generation unit includes an optical system and a photoelectric conversion unit, and generates a video signal according to the shooting.

And processes the video signal from the video signal generator to generate a digital video signal.

The communication interface is provided for communication with a traffic light controller.

The image analyzing unit analyzes the image of the digital image signal from the image signal processing unit to detect whether a vehicle image exists in each of a plurality of sections of each lane in the image frame, To the traffic light controller.

The traffic light controller may include a communication interface, a controller, and a traffic signal light driver.

The communication interface is provided for communication with the cameras.

Wherein the control unit judges the degree of vehicle congestion for each lane according to the detection result information input through the communication interface from the cameras, And outputs a traffic light control signal for the vehicle.

The traffic light driver drives the traffic lights according to the traffic light control signal from the controller.

The traffic light control system of the present invention may further include a main controller for communicating with the traffic light controller and controlling the operation of each traffic light controller.

Each of the traffic light lamp controllers may transmit the detection result information from the cameras to the main controller, and may determine whether or not the vehicle traffic congestion is detected based on the degree of vehicle stagnation for each road and the control information from the main controller The traffic lights for the respective roads can be controlled.

In this case, each of the traffic light lamp controllers may include a first communication interface, a second communication interface, a controller, and a traffic signal light driver.

The first communication interface is provided for communication with the cameras.

The second communication interface is provided for communication with the main controller.

The control unit judges the degree of vehicle congestion for each lane according to the detection result information input from the cameras through the first communication interface, and determines the degree of vehicle congestion for each lane, And outputs a traffic light control signal for each of the roads according to control information input from the controller through the second communication interface.

The traffic light driver drives the traffic lights according to the traffic light control signal from the controller.

According to the embodiments of the present invention, the presence or absence of a vehicle image in each of a plurality of sections of each lane in the image frame is detected, so that the degree of vehicle congestion for each lane can be efficiently determined.

This is because it is possible to judge whether a vehicle exists in each section by the image recognition function of the camera and that the vehicles waiting in the road area having a set distance from the road crossing area are connected to each other in a line .

For example, as the section in which the vehicle image exists is away from the road crossing area, the degree of stagnation of the vehicle becomes worse.

Therefore, the traffic congestion degree per lane can be efficiently grasped and the traffic lights can be automatically controlled.

1 is a view for explaining a traffic light control method according to an embodiment of the present invention.
2 is a flowchart illustrating a traffic light control method according to an embodiment of the present invention.
3 is a diagram for explaining an example of step S22 in FIG.
4 is a view for explaining a traffic light control system according to an embodiment of the present invention.
FIG. 5 is a diagram for explaining that, in any one of the cameras of FIG. 4, an image frame of a road area is divided into lanes of a road area, and each lane of an image frame is divided into a plurality of sections.
6 is a block diagram for explaining an internal configuration of one of the cameras in Fig.
FIG. 7 is a block diagram for explaining an internal configuration of the traffic light controller of FIG. 4. FIG.
8 is a view for explaining a traffic light control system of another embodiment of the present invention.
FIG. 9 is a block diagram for explaining an internal configuration of a traffic light lamp controller of FIG. 8. FIG.

The following description and accompanying drawings are for understanding the operation according to the present invention, and parts that can be easily implemented by those skilled in the art can be omitted.

Furthermore, the specification and drawings are not intended to limit the present invention, and the scope of the present invention should be determined by the claims. The terms used in the present specification should be construed to mean the meanings and concepts consistent with the technical idea of the present invention in order to best express the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a traffic light control method according to an embodiment of the present invention. 2 shows a traffic light control method according to an embodiment of the present invention. 3 is a diagram for explaining an example of step S22 in FIG.

1 to 3, a traffic signal lamp control method according to an embodiment of the present invention will be described as follows. In FIG. 1, reference E denotes east, W denotes west, S denotes south, and N denotes north.

The traffic light control method of an embodiment of the present invention includes steps S21 to S24 as a method for controlling the traffic light 12E, 12W, 12S, 12N for each road in the road crossing area.

In step S21, a road area having a set distance Ds from the road intersection area is photographed for each road.

For example, the trend camera 13E photographs the road area in the east (E) with the set distance Ds from the road crossing area. The west-west camera 13W photographs a road area in the west (W) having a set distance Ds from the road intersection area. The south-facing camera 13S photographs a road area on the south (S) side having the set distance Ds from the road crossing area. The north-facing camera 13N photographs the road area in the north (E) having the set distance Ds from the road crossing area.

In step S22, each surveillance camera 13E, 13W, 13S, 13N divides the image frame 3 of the road area by each lane in the road area, and divides each lane of the image frame into a plurality of sections B1- B10). Of course, step S22 will be performed in the initialization step of each of the surveillance cameras 13E, 13W, 13S, 13N according to the setting of the user.

For example, the lane of the road area may be divided into the first lane to the fourth lane, and the left lane (first lane), the straight lane (second and third lanes) and the right turn ) Lane. At least one of the left turn lane and the straight lane may include a plurality of lanes. Of course, the right turn (fourth lane) lane may not be used depending on the situation.

3, the left turn lane (first lane) is divided into three sections B1 to B3, the straight lane (second and third lanes) is divided into five sections B4 to B8, and the right turn Lane) lane is divided into two sections B9 and B10, respectively.

In step S23, each of the cameras 13E, 13W, 13S, and 13N detects whether there is a vehicle image in each of the plurality of sections B4 to B8 of each lane in the image frame.

In step S24, the traffic-traffic light controller 14 determines the degree of vehicle congestion for each lane on the basis of the detection results of the cameras 13E, 13W, 13S, and 13N, The traffic lights 12E, 12W, 12S, and 12N for the respective roads are controlled according to the degree of the traffic lights.

For example, when the trend camera 13E transmits information to the traffic-light controller 14 that a vehicle exists in all of the blocks B4 to B8 of the left-turn lane of the road area, the traffic-light controller 14 The left turn signal of the trend signal lamp 12E is turned on relatively long at a set ratio.

According to the above control method, it is possible to efficiently determine the degree of vehicle congestion for each lane by detecting whether a vehicle image exists in each of a plurality of sections B1 to B10 of each lane in the image frame 3 .

This is because it is possible to judge whether or not a vehicle exists in each of the sections B1 to B10 by the image recognition function of the cameras 13E, 13W, 13S and 13N and to judge whether or not the vehicle exists on the road having the set distance Ds from the road crossing area Vehicle waiting in the area is used to connect the lines in close proximity.

For example, as the distance between the final vehicle image and the road crossing area increases, the degree of vehicle congestion increases.

Accordingly, the traffic congestion degree of each lane can be efficiently grasped, and the traffic lights 12E, 12W, 12S, and 12N can be automatically controlled.

4 is a view for explaining a traffic light control system according to an embodiment of the present invention. 4, reference numerals C1 to C16 denote cameras, and 41a to 41d denote traffic light controllers, respectively. Fig. 5 is a diagram for explaining that in the camera C2 of Fig. 4, the image frame of the road area is divided into lanes of the road area and each lane of the image frame is divided into a plurality of sections B1 to B7 FIG.

Referring to FIGS. 4 and 5, in the traffic light control system of the embodiment of the present invention, traffic signal lamp controllers 41a to 41d are provided in respective road intersection areas.

In each road intersection area, cameras (C1 to C16) for photographing a road area having a set distance (Ds) from the road intersection area with respect to each road are provided.

The image frame of the road area is divided into lanes of the road area, and each lane of the image frame is divided into a plurality of sections (for example, B1 to B7).

For example, the lane of the road area may be divided into the first lane to the fourth lane, and the left lane (first lane), the straight lane (second and third lanes) and the right turn ) Lane. At least one of the left turn lane and the straight lane may include a plurality of lanes.

5, the left turn lane (first lane) is divided into three sections B1 to B3, the straight lane (second and third lanes) is also divided into three sections B4 to B6, and the right turn Lane) lane is divided into one section B7. Of course, the right turn (fourth lane) lane may not be used depending on the situation.

The cameras C1 to C16 detect whether there is a vehicle image in each of a plurality of sections (for example, B1 to B7) of each lane in the image frame, and transmit detection result information to the traffic light controllers 41a to 41d Respectively.

More specifically, the first to fourth cameras C1 to C4 transmit detection result information to the first traffic light lamp controller 41a. The fifth to eighth cameras C5 to C8 transmit detection result information to the second traffic light lamp controller 41b. The ninth to twelfth cameras (C1 to C12) transmit detection result information to the third traffic light lamp controller (41c). The thirteenth to sixteenth cameras C13 to C16 transmit detection result information to the fourth traffic light lamp controller 41d.

Each of the traffic light lamp controllers 41a to 41d determines the degree of vehicle congestion for each lane according to the detection result information from the cameras C1 to C16, (E.g., L2, L8, 12E, 12W, 12S, 12N in Fig. 1) for each road.

According to the above-described control system, it is determined whether or not there is a vehicle image in each of a plurality of sections (for example, B1 to B7) of each lane in an image frame, so that the degree of vehicle congestion for each lane can be efficiently determined have.

This is because it is possible to judge whether or not a vehicle exists in each section (for example, B1 to B7) by the image recognition function of the cameras C1 to C16 and the fact that a road having a set distance Ds from the road crossing area Vehicle waiting in the area is used to connect the lines in close proximity.

For example, as the distance between the final vehicle image and the road crossing area increases, the degree of vehicle congestion increases.

Therefore, the degree of traffic congestion per lane can be efficiently grasped, and the traffic lights (for example, L2 and L8, 12E, 12W, 12S and 12N in Fig. 1) can be automatically controlled.

Fig. 6 is a block diagram for explaining the internal configuration of any one of the cameras C1 of Fig.

4 and 6, each of the cameras C1 to C16 includes a video signal generation unit 61, a video signal processing unit 62, a communication interface 64, and an image analysis unit 63. [

The video signal generation unit 61 includes an optical system and a photoelectric conversion unit, and generates a video signal in accordance with the shooting. Here, the photoelectric conversion section is formed of a charge coupled device or a complementary metal-oxide semiconductor for converting an optical signal from an optical system into an electrical signal.

The video signal processing unit 62 processes the video signal from the video signal generating unit 61 to generate a digital video signal.

The communication interface 64 is provided for communication with a traffic light controller (for example, 41a).

The image analyzing unit 63 analyzes the image of the digital image signal from the image signal processing unit 62 and stores the image of each of the plurality of lanes (B1 to B7 in Fig. 5) And transmits the detection result information to the traffic light controller (for example, 41a) through the communication interface 64. The traffic light controller (e.g., 41a) Techniques for determining the type of an object by image recognition in a camera are already well known, and thus the description thereof is omitted.

FIG. 7 is a block diagram for explaining an internal configuration of the traffic light lamp controller 41a of FIG.

4 and 7, each traffic light controller (for example, 41a) includes a communication interface 71, a control section 72, and a traffic signal light driving section 73. [

The communication interface 71 is provided for communication with the cameras (any one of C1 to C16).

The control unit 72 determines the degree of vehicle congestion for each lane according to the detection result information input from the cameras (any one of C1 to C16) through the communication interface 71, And outputs a traffic signal light control signal for each road according to the degree of traffic congestion for each lane.

The traffic light driver 73 drives the traffic lights (for example, L2 and L8 in FIG. 5, 12E, 12W, 12S and 12N in FIG. 1) in accordance with a traffic light control signal from the controller 72.

8 is a view for explaining a traffic light control system of another embodiment of the present invention. Comparing the traffic light control system of Fig. 8 with that of Fig. 4, it can be seen that the main controller 82a in the control center 82 is added. Here, the main controller 82a controls the operation of each of the traffic light controllers 81a to 81d while communicating with the traffic light controllers 81a to 81d.

In Fig. 8, the same reference numerals as those in Fig. 4 denote objects having the same function. Since the traffic light control system of FIG. 4 has already been described in detail, only differences between the traffic light controllers 81a to 81d in accordance with the addition of the main controller 82a in the control center 82 do.

Each traffic light controller 81a to 81d transmits the detection result information from the cameras C1 to C16 to the main controller 82a.

In addition, each of the traffic light lamp controllers 81a to 81d generates traffic light signals (for example, traffic lights) for the respective roads in accordance with the degree of traffic congestion of each lane determined for each road and the control information from the main controller 82a L2, L8 of FIG. 5, 12E, 12W, 12S, 12N of FIG.

That is, each of the traffic light lamp controllers 81a to 81d generates traffic lights (for example, L2 and L8 in Fig. 5, 12E, 12W and 12E in Fig. 1) 12S, 12N in FIG. 1, 12E, 12W, 12S, 12N in FIG. 5) corresponding to the control information from the main controller 82a, ).

There is thus the additional effect that the traffic lights (e.g., L2, L8 of FIG. 5, 12E, 12W, 12S, 12N of FIG. 1) can be controlled interlockingly in the road crossing areas that are connected to each other.

Fig. 9 is a block diagram for explaining the internal configuration of one of the traffic light lamp controllers 81a to 81d in Fig. 8.

8 and 9, each of the traffic light lamp controllers 81a to 81d includes a first communication interface 91, a second communication interface 94, a control unit 92, and a traffic signal light driver 93. [

The first communication interface 91 is provided for communication with the cameras C1 to C16.

The second communication interface 94 is provided for communication with the main controller 82a in the control center 82. [

The control unit 92 determines the degree of vehicle congestion for each lane in accordance with the detection result information input from the cameras C1 to C16 through the first communication interface 91, And outputs a traffic light control signal for each road in accordance with the degree of vehicle stagnation and the control information input from the main controller 82a through the second communication interface 94. [

The traffic light driver 93 drives the traffic lights (e.g., L2 and L8 in FIG. 5, 12E, 12W, 12S and 12N in FIG. 1) in accordance with a traffic signal control signal from the controller 92.

That is, the control unit 92 controls the traffic signal lamp driving unit 93 according to the lane marking degree of each lane determined for each road, but if there is an associated command in the control information from the main controller 82a, And controls the signal lamp driving unit 93.

There is thus the additional effect that the traffic lights (e.g., L2, L8 of FIG. 5, 12E, 12W, 12S, 12N of FIG. 1) can be controlled interlockingly in the road crossing areas that are connected to each other.

As described above, according to the embodiments of the present invention, it is possible to efficiently determine the degree of vehicle congestion for each lane by detecting whether a vehicle image exists in each of a plurality of sections for each lane in an image frame .

This is because it is possible to judge whether a vehicle exists in each section by the image recognition function of the camera and that the vehicles waiting in the road area having a set distance from the road crossing area are connected to each other in a line .

For example, as the section of the vehicle image is away from the road crossing area, the degree of stagnation of the vehicle becomes worse.

Therefore, the traffic congestion degree per lane can be efficiently grasped and the traffic lights can be automatically controlled.

The present invention has been described above with reference to preferred embodiments. It will be understood by those skilled in the art that the present invention may be embodied in various other forms without departing from the spirit or essential characteristics thereof.

For example, in the embodiment of Figs. 4 to 7, the main controller 82a in the control center 82 is not interposed and the neighboring traffic light controllers 41a to 41d communicate with each other The traffic lights can be controlled in an interlocked manner. That is, even if the main controller 82a in the control center 82 is not interposed as in the embodiment of Figs. 8 and 9, the effect of the interlock control can be obtained.

Therefore, the above-described embodiments should be considered in a descriptive sense rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and the inventions claimed by the claims and the inventions equivalent to the claimed invention are to be construed as being included in the present invention.

It is likely to be used not only in a traffic light control system but also in a conveyor control system in a manufacturing factory.

12E, 12W, 12S, 12N ... Traffic lights, 13E, 13W, 13S, 13N ... cameras,
14 ... traffic light controller, E ... east,
W ... west, S ... south,
N ... North, Ds ... Set distance,
B1 to B10 ... division intervals, 3 ... picture frame,
C1 to C16 ... cameras, 41a to 41d ... traffic light controllers,
L2, L8 ... Traffic light controllers, 61 ... Image signal generator,
62 ... image signal processing section, 63 ... image analysis section,
64 ... communication interface, 71 ... communication interface,
72 ... control unit, 73 ... traffic-signal light driving unit,
81a to 81d ... Traffic light controllers,
82 ... control center, 82a ,,, main controller,
91 ... first communication interface, 92 ... control unit,
93 ... traffic light driver, 94 ... second communication interface.

Claims (11)

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  2. delete
  3. delete
  4. A traffic light control system comprising: a traffic light control unit
    Cameras for photographing a road area having a set distance from the road crossing area with respect to each road in each of the road crossing areas,
    An image frame of the road area is divided into lanes of the road area,
    Wherein each lane of the left turn and the straight line of the image frame is divided into a plurality of sections,
    The cameras,
    Detecting whether a vehicle image exists in each of a plurality of sections of each lane in the image frame, transmitting detection result information to each of the traffic light controllers,
    Wherein each of the traffic light lamp controllers comprises:
    Determining a degree of vehicle stagnation for each lane according to the detection result information from the cameras, and controlling a traffic light for each road according to the degree of lane marking for each lane determined for each road, It is determined that the degree of vehicle stagnation becomes worse as the finally existing section gets further from the road crossing area,
    Further comprising a main controller communicating with the traffic light controller and controlling the operation of each traffic light controller,
    Wherein each of the traffic light lamp controllers comprises:
    Transmits the detection result information from the cameras to the main controller,
    And controls the traffic lights for the respective roads according to lane-by-line traffic congestion levels determined for the respective roads and control information from the main controller.
  5. delete
  6. delete
  7. 5. The method of claim 4,
    An image signal generation unit that includes an optical system and a photoelectric conversion unit, and generates an image signal in accordance with the photographing;
    A video signal processor for processing a video signal from the video signal generator to generate a digital video signal;
    A communication interface for communication with a traffic light controller; And
    And a control unit that analyzes the image of the digital image signal from the image signal processing unit to detect whether a vehicle image exists in each of a plurality of sections of each lane in the image frame, and transmits detection result information to the traffic light controller Traffic light control system including image analysis part for transmission.
  8. delete
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  10. delete
  11. delete
KR1020110035152A 2011-04-15 2011-04-15 Method and system for controlling traffic lights KR101849366B1 (en)

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KR20160091540A (en) 2015-01-24 2016-08-03 양도근 The video-based radio-linked intersection traffic signal control system and control method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3435623B2 (en) * 1996-05-15 2003-08-11 株式会社日立製作所 Traffic flow monitoring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3435623B2 (en) * 1996-05-15 2003-08-11 株式会社日立製作所 Traffic flow monitoring device

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