KR101850100B1 - Video surveillance based safety system - Google Patents

Abstract

A surveillance image-based crime prevention system is disclosed. The system includes a crime prevention guide plate and a controller. The crime prevention guide plate notifies surveillance to the outside according to a surveillance notification command. And, the controller generates a heat map composed of thermal distribution graphics by accumulating a trajectory of a dynamic object in the surveillance image of a surveillance camera, and transmits the surveillance notification command to the crime prevention guide plate based on the change of the generated heat map. Accordingly, the present invention can notify an abnormal situation or an emergency situation through the crime prevention guide plate.

Description

{Video surveillance based safety system}

The present invention relates to a crime prevention system.

Crime prevention systems are well known by displaying information that a CCTV camera is in operation by monitoring CCTV cameras and LED warning signs for crime prevention. Related to this, Korean Patent Registration No. 10-0926578 discloses an all-night sign for crime prevention and a method of operating the same. According to this publication, the warning signs for crime prevention can transmit the photographed objects using the CCTV at night or emergency to the control center to prevent the danger.

Korean Patent Registration No. 10-0926578 (published on November 12, 2009)

An object of the present invention is to provide a surveillance image-based security system for guiding crime prevention based on a surveillance image.

According to one aspect, a surveillance image-based security system includes a security guide board and a controller. The security notice board can notify the outside that it is being monitored by the monitoring notification command. Then, the controller accumulates the trajectory of the dynamic object in the surveillance image of the surveillance camera to generate a heat map composed of graphics in a thermal distribution form, and can transmit the surveillance alert command to the security signboard based on the change of the generated heat map.

The controller can transmit the monitoring notification command to the security guide board when the color of the corresponding area of the heat map is changed to the predetermined color as the dynamic movement of the dynamic object lasts for a certain period of time.

The security sign board detects the movement with the motion detection sensor and can display that the motion detection is being monitored.

The security guide board may include a monitoring notification unit, a diffusion light emitting unit, a motion sensing unit, and a control unit. The surveillance notification unit may notify the outside that the surveillance unit is being monitored, and the diffused light emitting unit may include a plurality of adjacent light emitting regions, and the motion sensing unit may include one or more motion sensing sensors. The control unit may include a monitoring notification control unit and a light emission control unit. The surveillance alert control unit may activate and control the surveillance alert unit in response to the surveillance alert command received from the controller, and the light emission control unit may control the plurality of light emitting areas to sequentially emit light based on the detection result of the motion sensing unit.

The control unit may further include a detection control unit. The detection control unit activates and controls some of the motion detection sensors and can sequentially activate and control the remaining motion detection sensors one or more at a time only when motion is detected by the activated motion detection sensor.

According to the disclosed method, it is possible to identify an abnormal situation (abnormal situation) or an emergency situation in a bad area based on the heat map, and notify it through a security guide board.

1 is a block diagram of a surveillance-based crime prevention system according to an exemplary embodiment of the present invention.
2 is a block diagram of a security guide board according to an embodiment.
3 and 4 are views showing a motion detection signboard according to an embodiment.
5 is a partially exploded perspective view of a motion detection guide according to an exemplary embodiment of the present invention.
6 is a view illustrating a concave reflection plate according to an embodiment.
7 is a cross-sectional view taken along the line AA in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a surveillance-based crime prevention system according to an exemplary embodiment of the present invention. The surveillance image-based security system may include a surveillance camera 100, a central server 200, and a security guide board 300. However, only a part of these configurations may be included. The surveillance camera 100 may be a CCTV camera installed in a remote area. The surveillance camera 100 captures the surveillance area and transmits the surveillance video image to the central server 200 of the control center. The controller 210 of the central server 200 processes the surveillance image received from the surveillance camera 100 and transmits a surveillance notification command to the surveillance signboard 300 according to the processing result. The crime prevention sign board 300 is installed together with the surveillance camera 100 in the crime prevention area, and serves to prevent crime by informing the passing passerby that the passerby is watching. The security guide board 300 according to an aspect of the present invention indicates that it is being monitored to the outside when receiving a monitoring notification command from the monitoring camera 100. [

The controller 210 will be described in detail. The controller 210 may be a configuration of the central server 200, but may be a configuration of another device or a configuration belonging to the surveillance camera 100. The controller 210 may include a heat map generating unit 211 and a monitoring notification command unit 212. The heat map generator 211 accumulates the trajectory of the dynamic object in the supervisory image to generate a heat map. As is well known, a heat map refers to a map consisting of graphics in the form of a thermal distribution. To generate the heat map, the heat map generation unit 211 estimates the background image from the supervised image. For example, the heat map generating unit 211 estimates an image of a region that is continuously moving for a predetermined time period as a background image. When the background image is estimated, the heat map generation unit 211 extracts the foreground image by excluding the background image from the supervised image. The extracted foreground image is a dynamic object. The heat map generating unit 211 generates heat map data with the extracted full-screen image. The heat map data is metadata used to generate the heat map. The heat map data may include information necessary for generating a heat map image such as a pixel coordinate value of the locus region of the dynamic object and an occurrence time or an elapsed time after the occurrence, and may also include a pixel-by-pixel color value. The initial color value may be any color value between red and blue.

The heat map generating unit 211 generates a heat map using the heat map data. In one embodiment, the heat map generation unit 211 generates a heat map by reflecting a predetermined color to pixels corresponding to pixel coordinate values included in the heat map data. The pixel-by-pixel initial color value may be any color between red and blue. A red color means a high temperature, a blue color means a low temperature, and an object may have an arbitrary color between red and blue when it first appears. The heat map generation unit 211 generates a heat map by reflecting an initial color value to pixels. In one embodiment, the heat map generator 211 gradually changes the blue color of the pixel at the position where the dynamic object has passed, and the red color slowly at the pixel where the dynamic object is staying, over time And updates the heat map.

The monitoring notification command unit 212 determines whether or not to transmit a monitoring notification command to the security warning board 300 based on the heat map generated by the heat map generation unit 211. [ In one embodiment, the surveillance alert command unit 212 may be configured to display a security alert message when the color of the corresponding area of the heat map changes to a predetermined color, for example, red color, 300). That is, if the dynamic object remains in one place in the surveillance area, the surveillance command is transmitted to the security guiding board 300 because it is suspicious.

On the other hand, when the security notification board 300 receives the monitoring notification command from the controller 210, it notifies the outside that the security notification board 300 is being monitored. Apart from this, the security guide board 300 can detect movement by one or more motion detection sensors provided therein, and can inform that it is being monitored when motion is detected. The monitoring notification method according to an instruction from the controller 210 may be different from the surveillance notification method according to motion detection. The former may be a monitoring notification in a more intense manner than the latter.

2 is a block diagram of a security guide board according to an embodiment. 2, the security guide plate may include a monitoring notification unit 310, a diffusion light emitting unit 320, a motion sensing unit 330, and a control unit 340. The monitoring notification unit 310 may include a visual notification means. As a visual notification means, a warning light provided at one side of the security guide board can be exemplified. The warning light is activated under the control of the control unit 340 to be described later. The diffused light emitting portion 320 includes a plurality of adjacent light emitting regions 321, 322, and 323. The light emitting source of each of the light emitting regions 321, 322, and 323 may be an LED. In one embodiment, the diffused light emitting portion 320 includes a first light emitting region 321, a second light emitting region 322, and a third light emitting region 323. One or more LED elements, a light guide plate, and the like may be provided in each light emitting area. The first light emitting region 321, the second light emitting region 322, and the third light emitting region 323 emit light independently, and may be sequentially (progressively) emitted under the control of a controller 340 described later.

The motion detection unit 330 includes a plurality of motion detection sensors 331, 332, and 333. The motion detection sensor may be an infrared sensor. In one embodiment, the motion detection sensors 331, 332, and 333 are disposed in at least one of the light emitting regions 321, 322, and 323 of the diffused light emitting unit 320. That is, the motion detection sensors 331, 332, and 333 are included in the diffused light emitting unit 320 and are disposed in the light emitting regions 321, 322, and 323, respectively. For example, one first motion sensing sensor 331 is disposed in the first light emitting region 321, two second motion sensing sensors 332 are disposed in the second light emitting region 322, three And the third movement detecting sensor 333 is disposed in the third light emitting region 323. [ The motion detection areas of the motion detection sensors 331, 332, and 333 may be different. For example, the first motion sensing sensor 331 senses a relatively long distance relative to the second motion sensing sensor 332, and the second motion sensing sensor 332 senses relative motion relative to the third motion sensing sensor 333 To detect the distance. That is, the first motion detection sensor 331, the second motion detection sensor 332, and the third motion detection sensor 333 can detect movement of an object approaching the security guide board in this order.

The control unit 340 may be a combination of hardware and software, and may include a microprocessor capable of controlling peripheral devices in hardware. The control unit 340 according to an aspect may include a monitoring notification control unit 341 and a light emission control unit 342. The surveillance alert control unit 341 activates and monitors the surveillance alert unit 310 according to the surveillance alert command received from the controller 210. [ For example, the surveillance alert control unit 341 activates the surveillance light of the surveillance alert unit 310. [ The light emission control unit 342 controls the plurality of light emission regions 321, 322, and 323 to sequentially emit light according to the motion of the motion sensing unit 330. In one embodiment, the light emission control section 342 controls the light emission regions to sequentially emit light in the order of the first light emission region 321, the second light emission region 322, and the third light emission region 323. As a result, the progressive light emission is achieved, which improves the attention of the surrounding passenger compared to the simple light emission.

Meanwhile, the control unit 340 may further include a detection control unit 343. The detection control unit 343 controls activation of the motion detection sensors 331, 332 and 333 of the motion detection unit 330 so that the motion detection units 331, 332 and 333 are sequentially activated Activate. In one embodiment, the sensing control unit 343 activates and controls the first motion sensing sensor 331 disposed in the first light emitting region 321. When motion is detected by the first motion sensing sensor 331, 2 motion detection sensors 332, and further activates and controls the third motion detection sensors 333 thereafter. At this time, the detection control unit 343 may further control activation of the third motion detection sensors 333 only when motion is detected by the activated second motion detection sensor 332.

The emission control unit 342 controls emission of the emission regions 321, 322 and 323 of the diffusion light emission unit 320 according to the sensing control of the sensing control unit 343. The first light emitting region 321 is controlled to emit light when motion is detected by the first movement detecting sensor 332 and the second light emitting region 322 is controlled when the motion is detected by the second motion detecting sensor 332, The third light emitting region 323 can be controlled to emit light. That is, the light emission areas 321, 322, and 323 are controlled to sequentially emit light in accordance with the motion detection. According to the actual situation detected precisely as described above, it becomes possible to control the light emission effect for improving the attention as an effect according to the detection.

According to the above, the light emission by the diffusive light emitting unit 320 is performed first, and a monitoring notification by the monitoring notification unit 310 is made later. The diffusion light emitting unit 320 is activated as soon as the motion is detected in the monitoring area by the motion sensing unit 330, but the monitoring notification unit 310 is activated based on the change of the heat map. Accordingly, when the above system is used, it is expressed to the outside that it is being monitored using the diffusion LEDs at the time of motion detection, and when it is determined that a more active notification is required based on the heat map, have.

5 is a partially exploded perspective view of a guide plate according to an embodiment of the present invention, FIG. 6 is a view showing a concave reflection plate according to an embodiment, and FIG. 7 Is a sectional view taken along the line AA in Fig. The security guide plate 300 may be formed of a thin plate-like structure and may be installed on one side of a separate structure 20 installed on the support. Here, the structure may be an electric distribution board. 3 and 4, a shape 301 representing a CCTV camera is formed on the front surface of the security guiding plate 300 and light emitting areas 321, 322, and 323 for informing that CCTV monitoring is being performed are formed . In FIG. 5, reference numerals 321-1, 322-1, and 323-1 may denote a light guide plate positioned in the first light emitting region 321, the second light emitting region 322, and the third light emitting region 323, respectively Although not shown in FIG. 5, one or more LED elements may be disposed on the side of each light guide plate. 5, the first motion detection sensor 331, the second motion detection sensors 331, 332, and 333, and the third motion detection sensors 331, 332, The second light emitting region 322, and the third light emitting region 323, and is provided so as to face the inside of the diffused light emitting portion 320.

In addition, concave reflection plates 410, 420, and 430 are disposed inside the diffusing light emitting unit 320. 6, the first concave reflection plate 410 may have one concave reflection area 411 corresponding to the first motion detection sensor 331, and the second concave reflection plate 420 may have two concave reflection areas 411, The third concave reflection plate 430 may have three concave reflection areas 421 corresponding to the second motion detection sensors 331 332 and 333 and the third concave reflection plate 430 may have the third movement detection sensors 331 332, It is possible to have three concave reflection areas 431 corresponding to the concave reflection area 431. [ As shown in FIG. 7, the concave reflection plates 410, 420, and 430 improve the motion detection rate of the motion detection sensor. The detection signal (infrared signal) of the motion detection sensor is reflected by the concave reflection plate, To the outside. By using the concave reflector, it is possible to improve the power efficiency by improving the signal collection rate in the infrared region.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: surveillance camera 200: central server
210: controller 211:
212: Monitoring alert command part 300: Security indicator board
310: monitoring notification unit 320: diffusion light emitting unit
321: first light emitting region 322: second light emitting region
323: Third light emitting area 330:
331: first motion detection sensor 332: second motion detection sensor
33: third motion detection sensor 340:
341: monitoring notification control unit 342:
343: detection control unit 410: first concave reflection plate
420: second concave reflector 430: third concave reflector

Claims (5)

delete delete A security guide board informing the outside that it is being watched according to the monitoring notification command; And
A heat map generator for accumulating trajectories of dynamic objects in the surveillance image of the surveillance camera to generate a heat map composed of graphics in a thermal distribution form, and a monitoring notification command is transmitted to the security guide board based on the generated change in the generated heat map And a controller including a monitoring notification command unit,
The heat map generation unit estimates an image of a region having no motion continuously for a predetermined time in the supervised image as a background image, extracts the foreground image by excluding the background image estimated from the supervised image, and has a dynamic object Generates heat map data that is metadata used to generate the heat map, generates a heat map by reflecting the initial color between red and blue colors for pixels corresponding to pixel coordinate values included in the heat map data , The pixels of the dynamic object are changed from the first color to the blue color according to the passage of time, and the pixels of the dynamic object are changed from the first color to the red color and the heat map is updated ,
The surveillance alert command part sends a surveillance alert command to the security guards when the dynamic movement of the dynamic object lasts for a certain time and the pixels in the area where the dynamic object is staying turn red.
The security guiding plate according to claim 3, wherein:
A surveillance notification unit for informing the outside that the surveillance is being performed;
A diffusion light emitting unit including a plurality of adjacent light emitting regions;
A motion detection unit including one or more motion detection sensors; And
A monitoring notification control unit for activating and monitoring the monitoring notification unit in response to a monitoring notification command received from the controller; and a light emission control unit for controlling the plurality of light emission areas to sequentially emit light based on the detection result of the motion detection unit.
Based video surveillance system.
5. The apparatus of claim 4, wherein the control unit comprises:
A detection control unit for activating and controlling some motion detection sensors and sequentially activating and controlling the remaining motion detection sensors one or more at a time only when motion is detected by an activated motion detection sensor;
Wherein the security system further comprises:

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