KR101031995B1 - Guiding system for traffic safety in school zone - Google Patents

Abstract

PURPOSE: A guiding system for the traffic safety in a school zone is provided to prevent a collision accident by detecting the speed of a vehicle through the size of the license plate. CONSTITUTION: In a guiding system for the traffic safety in a school zone, an electric sign board(10) displays the license number and speed of a vehicle. A camera(21) for detecting vehicle speed consecutively takes a picture of a predetermined interested area in the road A camera unit(20) includes a camera for taking a picture of the license number. A speed sensor(31) detects the speed of a vehicle from a picture obtained by the camera for detecting vehicle speed A license number recognition unit(32) detects the license number from a picture by the camera for taking a picture of the license number.

Description

Explicit Safe Traffic Guidance System in Child Protection Zones {GUIDING SYSTEM FOR TRAFFIC SAFETY IN SCHOOL ZONE}

The present invention is an explicit safe traffic guidance system in a child protection zone to prevent overspeed driving in a child protection zone and to prevent a collision with a child who is a traffic weaker. The vehicle speed and vehicle number of the vehicle to be displayed on the signboard to reduce the speed to the speeding driver, and the presence or absence of pedestrians are also displayed on the signboard so that the driver knows the presence of the pedestrian, It relates to an explicit safe traffic guidance system in a child sanctuary that encourages caution and slows.

Child protection zones are designated as protection zones to protect children, who are underprivileged, from the danger of traffic accidents. Also called school zones, they are usually designated as main school routes within a 300m radius of the main entrance of elementary and kindergarten. Normally, the driving speed of the vehicle is limited to 30 km / h.

In order to convey these speed limits to vehicle drivers, traffic safety signs indicating the speed limit shall be installed in the child protection area.

Recently, techniques have been proposed to explicitly drive the driver of a speeding vehicle by monitoring whether the speed limit is being observed. In Korean Patent Nos. 10-0482303 and 10-2006-0104663, the driving speed of a vehicle is detected. On the road safety sign, and disclosed in Patent Publication No. 10-2006-0116759 and Patent No. 10-0920650, the vehicle number of the speeding vehicle by detecting the vehicle number of the speeding vehicle running over the speed limit with the vehicle speed. And vehicle speed are indicated on traffic safety signs.

Looking at the detection method of the vehicle speed in the above-mentioned conventional techniques, a method of detecting the speed by embedding two loop coils (Loop coil) on the road and detecting the pressure pressed by the vehicle, the laser light emitted toward the vehicle laser A method of detecting a speed according to the point of time at which light is reflected is used, a method of detecting a speed by image processing by imaging a driving vehicle with a camera, and the like. Here, the method of using the roof coil is difficult to maintain and construction due to frequent failures, and the method of using the laser light has a high possibility of malfunction and limited roads that can be applied. This is mainly used.

At this time, the method of detecting the speed by the image processing is to set a virtual loop on the image to detect the point of time passing through the virtual loop or to detect the change in the size of the vehicle license plate image in the image. Here, although the speed may be detected by the change of the size of the vehicle image, the speed is detected by the change of the size of the standardized vehicle license plate image, and thus the vehicle license plate image is used. However, the prior art uses only one of these two methods, and did not take advantage of each of the two methods.

In addition, when attempting to extract the license plate part by imaging the vehicle, the license plate is often not accurately extracted due to the shaking of the vehicle, the shaking of the camera, or the reflection by external light. I couldn't.

On the other hand, in the child protection area, even though the illegal parking is restricted, the driver stops temporarily, and because people put the object on the road, the driver cannot see the child because the object is blocked by the object or the parking vehicle. There are many times. Moreover, children who are weak in traffic may not be able to see the vehicle and simply cross the road without attention.In this case, if the driver does not identify the child, the probability of a traffic accident is very high. No measures were taken to prevent the accident.

KR 10-0482303 B1 2005.04.14. KR 10-2006-0104663 A 2006.10.09. KR 10-2006-0116759 A 2006.11.15. KR 10-0920650 B1 2009.10.07.

Accordingly, an object of the present invention is to adjust the speed value according to one of the methods after detecting both the speed detection method using the virtual loop in the image photographing the vehicle and the speed detection method by changing the size of the license plate image. It is to provide an explicit safe traffic guidance system in the child protection area that can accurately acquire the speed value by accurately detecting the size of the license plate in response to the instantaneous noise.

It is another object of the present invention to provide an explicit safety traffic guidance system in a child protection zone that enables to check the presence or absence of pedestrians even if the driver's vision is obstructed by illegal parking.

In order to achieve the above object, the present invention, in the explicit safety traffic guidance system in the child protection area, the electronic display board for displaying the vehicle number and the vehicle speed; The vehicle speed monitoring area A2 is designated to be connected to the vehicle speed detection camera 21 for capturing a vehicle speed monitoring area A2 predetermined on the road 1 in a continuous frame and to a portion where the vehicle speed monitoring area A2 ends. A camera part 20 including a car identification camera 22 for photographing a next monitoring area A1 closer to the camera; Speed detection unit 31 for detecting the vehicle speed of the entry vehicle by the image captured by the vehicle speed detection camera 21, and vehicle identification recognition unit for recognizing the vehicle number in the image captured by the vehicle identification camera 22 ( 32), and when the vehicle speed detected by the speed detector 31 exceeds a preset vehicle speed, the vehicle number of the corresponding entry vehicle is acquired by the vehicle identification camera 22 and the vehicle identification unit 32; A controller 30 for outputting a vehicle number and a vehicle speed to the electronic display board 10; Characterized in that configured to include.

The speed detector 31 of the controller 30 sets a plurality of virtual loops A22 in a frame image and matches a distance on the screen between the virtual loops A22 with distance information on the road 1. A first speed detection unit 311 which presets the information and detects the vehicle speed based on the time point passing through the virtual loop A22 and the distance map information; The second speed detection unit 312 detects the vehicle speed by changing the size of the license plate outline by sequentially extracting the license plate outline from the vehicle outline for each frame, and sequentially adopting a preset number of outlines satisfying the sharpness among the extracted license plate outlines. ; The controller 30 is configured to include, if the vehicle speed detected by the second speed detection unit 312 is within a preset error range based on the vehicle speed detected by the first speed detection unit 311. The vehicle speed detected by the second speed detector 312 is output to the electronic display panel 10, and when the vehicle speed is out of a preset range, the vehicle speed detected by the first speed detector 311 is output to the electronic display panel 10. It is characterized by.

The second speed detection unit 312 extracts the license plate outline by specifying the candidate area when extracting the license plate outline from a subsequent frame image, using the position where the first adopted license plate outline lies on the vehicle outline. The vehicle identification unit 32 may receive the information of the candidate area and extract the vehicle number by specifying the candidate area.

The second speed detection unit 312 is to extract the three or more license plate contours to obtain a vehicle speed by averaging the vehicle speed according to the change in size between the license plate contours.

The first speed detecting unit 311 sets three or more virtual loops A22 and averages vehicle speeds detected between virtual loops A22 to obtain vehicle speeds.

The camera unit 20 is a pedestrian for photographing the area A31 previously designated in the sidewalk 2 and the edge area A33 of the road 1 adjacent to the road boundary 3 as the pedestrian monitoring area A3. A detection camera 23 is provided, and the electronic display panel 10 includes a pedestrian presence display panel 16 displaying the presence or absence of pedestrians, and the controller 30 is connected to the pedestrian detection camera 23. A pedestrian detector 33 for detecting a moving object in the picked-up image is provided. If the detected moving object is smaller than or equal to a preset size, the pedestrian presence display panel 16 indicates that a pedestrian is present.

Therefore, the present invention configured as described above, by using the second speed detection unit 312 to detect the vehicle speed quickly by changing the size of the license plate contour and adopt only the license plate contour that meets the sharpness, as well as accurately detect the vehicle speed By using the first speed detecting unit 311, the vehicle loop speed can be detected by the virtual loop A22 to appropriately cope with the actual driving situation of the vehicle, and the vehicle driver can be quickly calculated as accurate driving information.

In addition, the present invention, even if the driver's field of view is obscured by a vehicle parked illegally on the road or objects temporarily placed on the sidewalk, informing the driver of the presence or absence of a pedestrian, thereby inducing a slow motion. This prevents accidental collision with pedestrians crossing the road unintentionally.

1 is a block diagram of an explicit safety traffic guidance system in a child protection zone according to a first embodiment of the present invention.
2 is an exemplary diagram in which an explicit safety traffic guidance system in a child protection zone according to a first embodiment of the present invention is installed on a post.
3 is a simplified diagram of a road with an explicit safe traffic guidance system in a child protection zone according to a first embodiment of the present invention;
4 is a side view of a road for explaining a process of acquiring vehicle speed in an explicit safe traffic guidance system in a child protection zone according to a first embodiment of the present invention;
Figure 5 is a block diagram of an explicit safety traffic guidance system in a child protection zone according to a second embodiment of the present invention.
6 is an exemplary diagram in which an explicit safety traffic guidance system in a child protection zone according to a second embodiment of the present invention is installed on a post.
7 is a simplified diagram of a road with an explicit safe traffic guidance system in a child protection zone according to a second embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

<First Embodiment>

1 is a block diagram of an explicit safe traffic guidance system in a child protection zone according to a first embodiment of the present invention,

2 is an exemplary diagram in which an explicit safety traffic guidance system in a child protection zone according to a first embodiment of the present invention is installed on a prop;

3 is a simplified diagram of a road provided with an explicit safety traffic guidance system in a child protection zone according to a first embodiment of the present invention;

4 is a side view of a road for explaining a process of acquiring vehicle speed in the explicit safety traffic guidance system in the child protection zone according to the first embodiment of the present invention.

1 to 3, the explicit safety traffic guidance system in the child protection area according to the embodiment of the present invention includes a signboard 10, a camera unit 20, and a controller 30. 1) It is installed in the prop (5) standing on the side. In addition, the controller 30 communicates with the center system 40 to be installed remotely to utilize the monitoring information in the child protection area in the center system 40.

The signboard 10 is installed on an arm of the support 5 so that a driver of a vehicle traveling on the road 1 toward the support 5 can be seen, and a speed limit display indicating a speed limit of the vehicle is shown. It has a face 11 and a safety sign marking face 12 indicating that the area is a child protection zone. The speed limit display surface 11 and the safety sign display surface 12 is made of a design of a traffic safety sign plate installed in a conventional child protection zone.

In addition, the electronic sign 10 according to an embodiment of the present invention, the vehicle number display panel 13 for displaying the vehicle number of the vehicle traveling over the speed limit, and the speed of the vehicle traveling over the speed limit And a vehicle speed display panel 14 for displaying, and a variable image display panel 15 for displaying a dangerous state in a variable image. Here, the vehicle number display panel 13, the vehicle speed display panel 14, and the variable image display panel 15 are variably changed according to a signal received from the controller 30.

The camera unit 20 includes a vehicle speed detection camera 21 for acquiring an image of a predetermined area on the road 1 to detect a vehicle speed; A vehicle identification camera 22 for acquiring a vehicle image for detecting a vehicle number of a vehicle traveling over a speed limit; It is configured to include, and transmits the captured image to the controller (30).

At this time, the vehicle speed detecting camera 21 acquires a moving image by capturing a continuous frame, and transmits the obtained moving image to the controller 30 in real time, and quickly moves the vehicle in the speed detecting unit 31 to be described later. It is preferable to employ a camera having a high frame number fs so that it can be easily detected, but in view of the processing speed of the speed detection unit 31, a camera having an appropriate frame number is employed.

In addition, since the vehicle identification camera 22 is a camera for recognizing a vehicle number, it is sufficient to employ a camera for acquiring an instant image, that is, a still image, according to a control signal of the controller 30. On the other hand, the vehicle identification camera 22 may employ a camera that can obtain a video of a continuous frame in the same manner as the vehicle speed detection camera 21, in this case, the vehicle in the speed detection unit 31 to be described later It is only necessary to recognize the vehicle number by selecting only the frames captured at this passing moment.

Here, referring to FIG. 3, the area photographed by the camera unit 20 includes: a vehicle speed monitoring area A2 photographed by the vehicle speed detecting camera 21; And a vehicle monitoring area A1 captured by the vehicle identification camera 22.

The vehicle speed monitoring area A2 is an area designated in advance on the road 1 corresponding to an entry portion into the child protection area in order to detect the speed of the vehicle entering the child protection area.

The vehicle monitoring area A1 is designated as being in contact with or close to the portion where the vehicle speed monitoring area A2 ends, and is located between the vehicle speed monitoring area A2 and the camera unit 20. Is specified in advance. Therefore, since the vehicle monitoring area A1 is closer to the camera unit 20 than the vehicle speed monitoring area A2, the present invention provides a vehicle of a vehicle that exceeds the speed limit in the vehicle speed monitoring area A2. After detecting the speed, the vehicle number can be detected by selecting the vehicle in the vehicle monitoring area A1.

The controller 30 obtains a vehicle speed and a vehicle number from the images captured by the vehicle speed detecting camera 21 and the vehicle identification camera 22, and outputs the vehicle speed and the vehicle number to the electronic display board 10. A speed detecting unit 31 for detecting and a vehicle identification unit 32 for recognizing a vehicle number are provided. That is, the controller 30 detects the vehicle speed using the speed detector 31 in the continuous frame image captured by the vehicle speed detecting camera 21, and when the detected vehicle speed exceeds a preset speed limit. After photographing the corresponding entry vehicle with the vehicle identification camera 22, the vehicle identification unit 32 recognizes the vehicle number, and outputs the detected vehicle speed and the recognized vehicle number to the electronic display panel 10. It is to let. In addition, the controller 30 controls the variable image display panel 15 of the electronic display panel 10 to output a warning image or a warning text when a vehicle exceeding the speed limit is detected.

The speed detecting unit 31 includes a first speed detecting unit 311 which detects the vehicle speed in the outline of the vehicle in successive frames photographed by the vehicle speed detecting camera 21 and a vehicle speed in the outline of the vehicle license plate. It consists of a second speed detection unit 312 to detect the, accordingly the controller 30 can selectively adopt the vehicle speed respectively detected by the first and second speed detection unit (311, 312).

In detail, the first speed detecting unit 311 presets a plurality of virtual loops A22 indicating positions on the road 1 on the frame image captured by the vehicle speed detecting camera 21, and sets a virtual loop A22. ) Through the plurality of virtual loops A22 while extracting the outline of the vehicle from a continuous frame image in a state of preset distance map information matching the on-screen distance between the screens with the distance information on the road 1. The vehicle speed is detected by linking the passage time of each virtual loop A22 with the distance map information. Here, since the imaging parallax between the frame images is determined according to the number of frames picked up per second by the vehicle speed detecting camera 21, the parallax between the virtual loops A22 can be obtained by ringing the number of frames and based on the distance map information. The vehicle speed can be calculated. And, extracting the vehicle outline on the frame image can be extracted as a vehicle image of the background image when there is no vehicle and the image currently obtained by the vehicle speed detecting camera 21, and the technique of extracting the vehicle outline is a known technique. Therefore, detailed description is omitted.

On the other hand, the virtual loop (A22) is set to three or more, the first speed detection unit 31 calculates the vehicle speed for each virtual loop (A22) and averages the calculated vehicle speed to detect the vehicle speed more accurately It is desirable to make it. In the exemplary embodiment of the present invention illustrated in FIG. 4, since four sections are divided into virtual loops A22 by setting the virtual loops A22 to five, four vehicle speed values are calculated. The average vehicle speed is averaged to obtain the final vehicle speed.

Here, since the vehicle may stop or slow in the vehicle speed monitoring area A2 and proceed at a high speed, the speed limit set in advance among the section speeds partitioned into the virtual loop A22 in the vehicle speed monitoring area A2. If there is a speed value below, the final vehicle speed can be obtained by averaging only the speed value detected in the subsequent section except the speed value and the speed value detected in the section before detecting the speed value.

In addition, the vehicle speed detected in the virtual loop closest to the vehicle monitoring area A1 may be adopted as the final vehicle speed.

It is preferable to select one of the calculation methods of the vehicle speed according to the size of the section length of the vehicle speed monitoring area A2.

The second speed detection unit 312 extracts the license plate contour for each vehicle outline from the vehicle outline for each frame extracted by the first speed detection unit 311. The extraction technique of the license plate outline is a well-known technique, and thus a detailed description thereof will be omitted.

However, the second speed detection unit 312 according to the present invention sequentially adopts only license plate outlines satisfying a predetermined sharpness among the extracted license plate outlines, and when the number of adopted license plate outlines is filled by a predetermined number, A set number of license plate contours is characterized by detecting the vehicle speed based on the parallax between the picked-up frames and the change in the size of the license plate contour. Accordingly, the section A21 of the road 1 for extracting the abacus profile, the first portion of the vehicle speed monitoring area A2, that is, the vehicle into the vehicle speed monitoring area A2, as shown in FIG. It belongs to the beginning of entry, but as the number of frames that fail to obtain a clear license plate outline increases, it becomes a variable section that may become longer.

In addition, the vehicle speed can be detected only if the preset number is at least two, but the second speed is set to three or more so that the vehicle speed for each section between frames adopting the license plate outline is detected and averaged to obtain the final vehicle speed. The detection unit 312 may also be configured, in which case a more accurate vehicle speed is obtained.

In general, the license plate contour captured by the moving image is often not accurately captured due to the shaking of the vehicle, the shaking of the vehicle speed detecting camera 21, or the reflection of light. If a license plate profile with satisfactory sharpness was not obtained, it was retried in the next frame.

Meanwhile, the second speed detection unit 312 according to an embodiment of the present invention extracts the license plate outline from the vehicle outline of a subsequent frame image, using a position where the first adopted license plate outline lies on the vehicle outline. At that time, the license plate outline is extracted by specifying the candidate area. That is, the second speed detection unit 312 extracts the license plate outline by specifying only candidate regions on the vehicle outline when extracting the license plate outline from the vehicle outline of the next frame using the position information of the vehicle outline obtained first. This is because extracting the license plate outline to a candidate area can shorten the image processing time rather than extracting the license plate outline by image processing the entire vehicle outline. At this time, since the vehicle contour cannot be extracted accurately, the candidate area is slightly larger than the size of the license plate area, and it is preferable to change the proportion proportionally according to the size of the vehicle wheel.

As described above, the controller 30 according to the present invention detects the vehicle speed by changing the size of the license plate and the first speed detector 311 that detects the vehicle speed by the virtual loop A22 and the license plate size. The vehicle speed detected by the second speed detector 312 is supplemented with the vehicle speed of the first speed detector 311 by performing parallel processing by the second speed detector 312.

That is, if the vehicle speed detected by the second speed detection unit 312 is within a preset error range based on the vehicle speed detected by the first speed detection unit 311, the controller 30 determines the second speed. The vehicle speed detected by the detection unit 312 is determined and adopted to be an accurate value, and the vehicle speed detected by the second speed detection unit 312 is preset based on the vehicle speed detected by the first speed detection unit 311. If it is out of the error range, the vehicle speed detected by the second speed detection unit 312 is determined to be an incorrect value, and the vehicle speed detected by the first speed speed detection unit 311 is substituted for the second speed detection unit 312. To adopt.

In general, the license plate is standardized to a certain size and shape, so that the contour can be extracted compared to the standardized size and shape, it is possible to extract the contour more accurately than to extract the contour of the vehicle having various sizes and shapes. . Accordingly, the present invention obtains the vehicle speed by extracting the license plate contour with the second speed detector 312, but the burden of image processing required in the process of extracting the license plate contour is large, so that the vehicle passes through the vehicle speed monitoring area A2. In order to process the entire continuous frame, an image processing time is delayed and an apparatus having expensive image processing performance must be employed.

Therefore, the present invention extracts only a predetermined number of outlines from the frame, the vehicle speed detection method using the virtual loop (A22) to change the vehicle speed, such as stopping or pausing in the vehicle speed monitoring area (A2). It is coping.

The vehicle identification unit 32 recognizes the vehicle number from the image captured by the vehicle identification camera 22, and the technology for recognizing the vehicle number may be selected and applied from known technologies, and thus, detailed description thereof will be omitted. .

However, in the exemplary embodiment of the present invention, the vehicle identification unit 32 receives information on the candidate area of the license plate obtained by the second speed detection unit 312 and captures the image from the vehicle identification camera 22. By identifying the vehicle number by identifying the candidate area on the image, the recognition time of the vehicle number is shortened as compared with the related art.

On the other hand, the center system 40 receives the vehicle speed detected by the controller 30, the vehicle number of the vehicle traveling over the speed limit, or the image of the vehicle traveling over the speed limit from the controller 30 to receive a database It can be used for statistical data on traffic and the crackdown of speeding vehicles.

Second Embodiment

5 is a block diagram of an explicit safety traffic guidance system in a child protection zone according to a second embodiment of the present invention,

6 is an exemplary diagram in which an explicit safety traffic guidance system in a child protection zone according to a second embodiment of the present invention is installed on a prop;

7 is a simplified diagram of a road on which an explicit safe traffic guidance system is installed in a child protection zone according to a second embodiment of the present invention.

As shown in FIG. 5 to FIG. 7, the safety traffic guidance system according to the second embodiment of the present invention includes a pedestrian presence display panel 16 added to the electronic display panel 10 as compared with the first embodiment; A pedestrian detection camera 23 added to the camera unit 20; And a pedestrian detector 33 added to the controller 30.

The pedestrian presence display panel 16 is a display panel for informing the driver when a pedestrian exists in the child protection area, and the left pedestrian presence display panel 16L disposed on the left side of the display surface of the electronic display panel 10. ) And a right pedestrian presence display panel 16R disposed on the right side of the display surface, and outputs a preset image or text according to a control signal transmitted from the controller 30. 5 and 6, the safety mark display surface 12 is disposed between the left pedestrian presence display panel 16L and the right pedestrian presence display panel 16R. To be viewed as an image associated with. In addition, the electronic sign 10 according to the second embodiment of the present invention is to position the speed limit display surface 11, the safety sign display surface 12, the vehicle number display panel 13 and the vehicle speed display panel 14 Although it moved on the display surface and deformed the shape, such positional movement and shape deformation can be selected according to a desired shape.

The pedestrian detection camera 23 preferably takes a pedestrian monitoring area A3 designated in the child protection area, transmits the captured image to the controller 30, and employs a camera that captures a moving image.

Here, the pedestrian monitoring area (A3) is, as shown in Figure 7, the area for monitoring the pedestrians crossing the road (1) or pedestrians that may cross the road (1) in the child protection zone. As a pre-designated area A31 on sidewalk 2 in the child protection zone, and a road boundary 3 adjacent the area A31 on sidewalk 2 and the boundary between road 1 and sidewalk 2. Edge area A33 on the road 1 in the vicinity of the arrow 1). In addition, the pedestrian monitoring area (A3) preferably comprises an area (A32) on the crosswalk (4).

Here, the area A31 designated on the sidewalk 2 of the pedestrian monitoring area A3 is preferably designated only on the sidewalk 2 proximate to the road boundary 3, which is to cross the road 1. This is because misinformation of pedestrians who are likely to cross even unintended pedestrians may interfere with driving. Therefore, the area A31 designated on the sidewalk 2 is along the road boundary 3 so that its width is smaller than the width of the sidewalk 2.

On the other hand, the road boundary 3 may be provided with a guard rail, but may also be installed in a low height road boundary stone so that pedestrians may enter the road 1 beyond the road boundary stone, as shown in FIG. 7 in the embodiment of the present invention. As described above, the range of the area is set such that the area A33 designated at the edge of the road 1 in the pedestrian monitoring area A3 includes the road boundary 3.

In addition, since the sidewalk 2 is formed on both sides of the road 1, as shown in FIG. 7, the pedestrian detection area A3 has a symmetrical shape with respect to the road. However, when there is an intersection such as a three-way or a crossroad in the child protection area, the pedestrian monitoring area 3 has an asymmetrical shape.

The pedestrian detector 33 extracts only an image portion corresponding to the pedestrian monitoring area A3 from the image captured by the pedestrian detection camera 23 and generates a difference image by subtracting the extracted image portion from a background image. In addition, the controller detects whether there is a moving object in the pedestrian monitoring area A3, and if the moving object is detected, the detected moving object is distinguished in which direction based on the road 1.

When the size of the detected moving object is less than or equal to the preset size, the controller 30 determines that the pedestrian is present and displays the presence of the pedestrian by operating the pedestrian presence display panel 16. At this time, the controller 30 selectively operates the left pedestrian presence display panel 16L and the right pedestrian presence display panel 16R according to the position of the moving object. That is, the controller 30 activates the left pedestrian presence display panel 16L when the moving object is detected on the left side based on the road, and activates the right pedestrian presence display panel 16R when the moving object is detected on the right side.

Here, the preset size, which is a comparison criterion for the size of the moving object, is a criterion for detecting the presence or absence of a pedestrian, and therefore, is preferably set larger than a human shape and smaller than a vehicle.

In addition, since the pedestrian monitoring area A3 includes the edge area A33 of the road 1, a part of the moving vehicle can be captured by the pedestrian detection camera 23. Therefore, the pedestrian detection unit 33 is a vehicle for an object moving in a straight line along the road 1, that is, an object moving in the traveling direction of the road 1 and an object moving closer to the traveling direction of the road 1. It is preferable not to detect the moving object by judging.

On the other hand, the vehicle may illegally park at the edge area A33 of the road 1, and people may illegally bring the goods to the edge A31 of the sidewalk 2, so that the pedestrian detection unit 33 When the background image used is an image when there is no illegally parked vehicle or an illegally placed object, it takes a long time to detect a moving object in the pedestrian detection unit 33. Furthermore, illegally parked vehicles or illegally placed objects are generally in the pedestrian monitoring area A3 only within a certain time.

Therefore, in the embodiment of the present invention, the pedestrian detector 33 generates a temporary background image by including the stopped object in the background image when the object larger than the preset size is stopped within a preset range of time. The moving object is detected as a difference image comparing the generated temporary background image with the image captured by the pedestrian detection camera 23. Accordingly, the pedestrian detection unit 33 can detect the pedestrian more quickly to inform the pedestrian presence display panel 16 that there is a pedestrian.

In addition, the controller 30 may store the image of the illegally parked vehicle detected in the process of generating the temporary background image in the pedestrian detection unit 33 and use it as data for stopping the vehicle.

In FIGS. 3 and 7 illustrated to facilitate understanding of the present invention, only one lane road 1 is monitored by the present invention based on the central separation line 1 ', but the image of the other lane is shown. It may be provided with a vehicle speed detecting camera and a vehicle identification camera for obtaining the vehicle. That is, those skilled in the art to which the present invention pertains can easily apply the present invention to roads capable of only one-way traffic or roads partitioned into a plurality of lanes.

In addition, although not shown in Figures 1 to 7, the present invention may be provided with a speaker (not shown) to inform the pedestrian that the vehicle is entering the child protection area. These speakers are preferably installed one by one before and after the sidewalk 2. Because, in general, a person turns his head toward the direction of the warning sound.

Although illustrated and described in the specific embodiments to illustrate the technical spirit of the present invention, the present invention is not limited to the same configuration and operation as the specific embodiment as described above, within the limits that various modifications do not depart from the scope of the invention It can be carried out in. Therefore, such modifications should also be regarded as belonging to the scope of the present invention, and the scope of the present invention should be determined by the claims below.

A1: Vehicle monitoring area A2: Vehicle speed monitoring area A22: Virtual loop
A3: Pedestrian monitoring area
1: Road 2: India 3: Road boundary 4: Crosswalk
Reference Signs List 10 display board 11 speed limit display surface 12 safety sign display surface
13: vehicle number display panel 14: vehicle speed display panel
15: variable image display panel 16: pedestrian presence display panel
20: camera unit
21: vehicle speed detection camera 22: car identification camera 23: pedestrian detection camera
30 controller 31 speed detector 311 first speed detector
312: second speed detection unit 32: car number recognition unit 33: pedestrian detection unit
40: center system

Claims (7)

delete delete delete delete delete delete Pedestrian presence display panel that displays the vehicle number and vehicle speed, and consists of the left pedestrian presence display panel 16L installed on the left side and the right pedestrian presence display panel 16R installed on the right side to indicate the presence of pedestrians. An electric display plate 10 also provided with 16;
The vehicle speed monitoring area A2 is designated to be connected to the vehicle speed detection camera 21 for capturing a vehicle speed monitoring area A2 predetermined on the road 1 in a continuous frame and to a portion where the vehicle speed monitoring area A2 ends. A car identification camera 22 which captures the next monitoring area A1 closer than the following, and an area A31 designated in the sidewalk 2 and an edge area of the road 1 close to the road boundary 3 A camera unit 20 including a pedestrian detection camera 23 for photographing A33 as a pedestrian monitoring area A3;
Speed detection unit 31 for detecting the vehicle speed of the entry vehicle by the image captured by the vehicle speed detection camera 21, and vehicle identification recognition unit for recognizing the vehicle number in the image captured by the vehicle identification camera 22 ( 32) and a pedestrian detection unit 33 for detecting a moving object in the image captured by the pedestrian detection camera 23, and the vehicle speed detected by the speed detection unit 31 exceeds a preset vehicle speed. The vehicle number of the corresponding entry vehicle is acquired by the vehicle identification camera 22 and the vehicle identification unit 32, and the vehicle number and the vehicle speed are output to the electronic display board 10, and the movement detected by the pedestrian detection unit 33. If the object is smaller than the preset size, the pedestrian presence display panel 16 indicates that there is a pedestrian, but the moving object is detected by classifying the pedestrian monitoring areas A3 on both sides based on the road 1, and the moving object is positioned. On Selectively movable to the left to the controller 30 indicating that this is a pedestrian the pedestrian or without a display panel (16L) and a right pedestrian or without a display panel (16R);
Consists of including

The speed detector 31 of the controller 30,
A plurality of virtual loops A22 are set in the frame image of the vehicle speed monitoring area A2, and the distance map information in which the distance on the screen between the virtual loops A22 is matched with the distance information on the vehicle speed monitoring area A2 is previously displayed. By setting, the vehicle speed for each section divided into virtual loops A22 is detected based on the point of time passing through the virtual loop A22 and the distance map information, and the vehicle speed for each section is averaged. A first speed detection unit 311 averaging the speed value detected in a section after the section in which the speed value is less than the speed limit is set as the vehicle speed if the speed value is less than the speed limit;
In the image of each frame, the vehicle contour of the vehicle detected at the portion where the vehicle starts to enter the vehicle speed monitoring area A2 is extracted, and the license plate contour is extracted from the extracted vehicle contour, and satisfies a predetermined sharpness among the extracted license plate contours. The license plate contour is sequentially adopted as many as the preset number, and the vehicle speed is detected by the change of the size of the license plate contour, and the frame where the license plate contour first adopted in the extraction process of the license plate contour is placed on the vehicle contour as a candidate area, Extracting the license plate contour by identifying the candidate area when extracting the license plate contour from the image, and transferring the information of the candidate area to the vehicle identification unit 32 to extract the vehicle number by specifying the candidate area Speed detecting unit 312;
Consisting of,
If the vehicle speed detected by the second speed detection unit 312 is within a preset error range based on the vehicle speed detected by the first speed detection unit 311, the controller 30 determines the second speed detection unit ( The vehicle speed detected by 312 is output to the electronic display panel 10, and when the vehicle speed is out of a predetermined range, the vehicle speed detected by the first speed detection unit 311 is output to the electronic display panel 10,

The pedestrian detection unit 33,
A moving object is detected as a difference image obtained by subtracting an image captured by the pedestrian detection camera 23 from a background image, and when an object larger than the preset size is stopped within a preset range of time, the stationary object The explicit safety traffic guidance system in a child protection zone, characterized in that for detecting the moving object to the vehicle image obtained by subtracting the image taken by the pedestrian detection camera 23 from the temporary background image including the background image.

Images