KR101381171B1 - Graffiti surveilance system by chemical ingredient detection and image analysis - Google Patents

Abstract

Disclosed is a graffiti monitoring system through chemical component detection and image analysis. The graffiti monitoring system according to the present invention monitors the act of painting or graffiti by spraying lacquer spray or paint spray on a wall (hereinafter referred to as 'doodle') to prevent such graffiti. Detects chemical components, especially volatile organic compounds, contained in lacquer sprays or paint sprays by detection sensors, and determines whether graffiti is occurring quickly and accurately by photographing the wall and its surroundings with a camera. It is also possible to eliminate graffiti by automatically notifying the remote monitoring system and the police reception system when such graffiti occurs.

Description

Graffiti Surveilance System By Chemical Ingredient Detection And Image Analysis}

The present invention relates to a graffiti monitoring system through chemical component detection and image analysis, and more particularly, to paint or graffiti by spraying lacquer spray or paint spray on the wall (hereinafter, referred to as 'graffiti'). In order to prevent such graffiti, the chemical detection sensor detects chemical components, especially volatile organic compounds, contained in lacquer sprays or paint sprays, and photographs walls and surroundings with cameras. By detecting whether graffiti is occurring, it is possible to quickly and accurately determine whether graffiti has occurred, and when such graffiti occurs, the chemical component detection can be eradicated by automatically notifying the remote monitoring system and the police report receiving system. And it relates to a graffiti surveillance system through image analysis.

Street graffiti and cultural property graffiti are emerging as social issues in the United States, Europe and Australia. Such graffiti is not just a graffiti but there are all kinds of criminal activities behind it. Graffiti is often performed by gangs to mark their territory. The presence of two or more different graffiti is an indication that another gang has entered the territory of the existing gang, which also foretells future gang violence.

In the area where such graffiti is made, various problems occur such as not only real estate prices drop due to widespread crime, but also people's departure, which leads to a decrease in revenues of local governments, worsening public services and deepening youth problems. The vicious cycle of problems devastates the whole city.

In the U.S. alone, the annual spending budget is growing exponentially to combat street graffiti. Specifically, the US government spending $ 12 billion in 2002 increased to $ 17 billion in 2008. This is twice the amount of theft, more than twice the amount of theft, and three times the amount of theft.

The US government's efforts to prevent such street graffiti have been made, but until now, it has not been sufficiently effective, and no effective system for preventing street graffiti has been proposed.

Korean Patent Application Publication No. 10-2011-0025886 (published on March 14, 2011) discloses a method and system in which audio and video surveillance are combined. The system has an audio module with audio inputs connected to an acoustic transducer receiving ambient sound signals in the monitored area and a video module with video inputs connected with an image sensor receiving visual events in the monitored area. If a specific event is detected at the same time in the audio module and the video module, the central processor generates an alarm signal. At this time, the specific event includes street graffiti.

When the above-described prior art system is used to monitor and prevent street graffiti, it may be appropriate to determine whether street graffiti is occurring by image analysis. However, if a specific event to be detected is a vehicle crash, firearm, assault, robbery, etc., since a specific sound is generated during such an action, it is possible to assume that the specific event has occurred by detecting such a sound, but in a monitored area Judging whether graffiti is taking place by sound analysis of the environment seems somewhat inappropriate. Because the sound that occurs during street graffiti may be the sound of spraying the lacquer spray, which can be confused with other sounds, making it difficult to say that it is unusual or characteristic.

Accordingly, the present inventors have studied the elements that can specify the occurrence of the street graffiti behavior, and as a result, the present invention has been reached.

Accordingly, an object of the present invention is to determine whether the graffiti has occurred accurately and quickly, and also to eliminate the graffiti by automatically notifying the remote monitoring system and the police report receiving system when such graffiti occurs. It is to provide a graffiti monitoring system through component detection and image analysis.

Graffiti monitoring system through the chemical component detection and image analysis according to the present invention for achieving the above object is a chemical to detect the chemical component contained in the lacquer spray or paint spray sprayed on the wall to draw or graffiti Component detection sensor; A chemical component analysis module configured to receive a signal from the chemical component detection sensor and analyze a detection degree of the chemical component; A camera for photographing the wall to be monitored and its surroundings; An image analysis module configured to receive a signal from the camera and determine whether an act of painting or graffiti is applied to the wall by lacquer spray or paint spray; A central processing unit which receives a result analyzed by the chemical component analysis module and the image analysis module and performs processing according to the received analysis result; A memory unit for storing result data by processing of the central processing unit and data used for processing of the central processing unit; And a communication unit which transmits the processing result of the central processing unit to the outside via the Internet, an Internet, or a telephone network.

When the central processor detects that the chemical component is detected by the chemical component detection module or more than the reference value or the act of painting or graffiti on the wall by lacquer spray or paint spray by the image analysis module, At least one of storing a video photographed by the camera in the memory unit and notifying the outside that graffiti is occurring on the wall with or without the photographed video through the communication unit; To do.

Only when the chemical component is detected above the reference value by the chemical component detection module or when the act of painting or graffitiing the wall with lacquer spray or paint spray by the image analysis module is occurring. When the occurrence occurs, the central processing unit performs only an operation of storing the moving picture photographed by the camera in the memory unit, and when the chemical component is detected by the chemical component detection module above the reference value and by the image analysis module. When it is judged that painting or graffiti is performed by lacquer spray or paint spray on the wall, when all of the occurrence occurs, the central processing unit stores the video photographed by the camera in the memory unit and through the communication unit. remind That is happening in the act of graffiti wall with youngdoen without a video or a movie clip is preferable to perform both actions to inform the outside.

The outside where the central processing unit notifies that graffiti is occurring is preferably one or both of a remote monitoring system and a report reception system of a police station.

The chemical component detection sensor preferably detects volatile organic compounds contained in lacquer sprays or paint sprays.

The image analysis module compares the images photographed by the camera with a lacquer spray or a paint spray on a wall with reference images stored in the memory unit when the similarity is higher than a predetermined level. It is desirable to determine that the act of painting or graffitiing the wall with lacquer spray or paint spray is taking place.

The graffiti monitoring system may further include a high magnification camera that photographs the wall from the opposite side of the wall, and the central processing unit determines that the graffiti action is occurring by both the chemical component detection module and the image analysis module. The high magnification camera may transmit a signal so that the high magnification camera photographs the corresponding wall surface.

The graffiti monitoring system through chemical component detection and image analysis according to the present invention detects chemical components, particularly volatile organic compounds, contained in lacquer sprays or paint sprays by chemical detection sensors, and also the wall and its It is possible to quickly and accurately determine whether graffiti is occurring by taking a picture of the surrounding area, and also to exterminate graffiti by automatically notifying the remote monitoring system and the police report receiving system when such graffiti occurs. .

1 is a block diagram showing a schematic configuration of a graffiti monitoring system through the chemical component detection and image analysis according to the present invention.
2 is a diagram illustrating an example in which a camera and a chemical component detection sensor applied to the system of the present invention are installed on a wall.
3 is a flowchart showing an example of the operation of the chemical component analysis module in the system of the present invention.
4 is a flowchart showing an example of the operation of the image analysis module in the system of the present invention.
5 is a flowchart showing an example of the operation of the central processing unit in the system of the present invention.
6 is a diagram showing a configuration of a specific example of the graffiti monitoring system of the present invention.
7 is a state diagram in which the graffiti monitoring system of FIG. 6 is installed on a corresponding wall surface.
FIG. 8 is a state diagram in which the graffiti perception system of FIG. 6 is installed on various walls, respectively, and a high magnification camera is installed on the opposite side of the wall.
9 is an example in which the graffiti perception system of FIG. 6 is installed on a plurality of walls, respectively, and a high magnification camera installed opposite to a wall where graffiti is occurring in a state where a high magnification camera is installed opposite the wall. Figure is a diagram.

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

As shown in FIG. 1, the graffiti monitoring system 10 through chemical component detection and image analysis according to the present invention includes a chemical component detection sensor 100 and a camera 200.

The chemical component detection sensor 100 detects chemical components, particularly volatile organic compounds contained in a lacquer spray or a paint spray, which are sprayed on a wall and painted or scribble (hereinafter, referred to as 'doodle'). The chemical component detection sensor 100 is basically the same function as the gas detection sensor used in the gas leak alarm device. The camera 200 photographs a wall to be monitored and its surroundings.

FIG. 2 shows an example in which a camera and a chemical component detection sensor applied to the system of the present invention are installed on a wall, and two cameras 200 are installed on an upper part of a wall to be monitored. The camera 200 is not necessarily installed on the wall to be monitored. If the camera 200 can contribute to detecting graffiti by photographing the monitored wall and its surroundings, the camera 200 may be installed on the neighboring wall or the wall of the opposite building. One Taiwan may be installed, but two or more cameras may be installed to detect graffiti.

2 shows an example in which a chemical component detection sensor 100 is installed on a plurality of monitored walls, but the chemical component detection sensor 100 may be installed by only one, but volatile contained in a lacquer spray or a paint spray. In order to effectively detect an organic compound, it is preferable to provide in multiple numbers. More preferably, it is evenly arranged on the wall to be monitored.

The doodle monitoring system 10 of the present invention includes a main body 300 for receiving and processing a signal from the chemical component detection sensor 100 and the camera 200. The main body 300 includes a chemical component analysis module 310, an image analysis module 320, a central processing unit 330, a memory unit 340, a LAN port 350, and an I / O port 360. Here, although the chemical component analysis module 310 and the image analysis module 320 has been described as being installed in the main body 300, in some cases, they are each a sensor box and a camera in which the chemical component detection sensor 100 is installed It is also possible to be installed in the camera box 200 is installed.

The chemical component analysis module 310 receives a signal from the chemical component detection sensor 100 and analyzes the degree of detection of the chemical component. The chemical component analysis module 310 compares the detection level of the chemical component received from the chemical component detection sensor 100 with reference to the reference value stored in the memory unit 340, that is, when the concentration is higher than the reference value, the graffiti behavior occurs. And the result is transmitted to the CPU 330.

The image analysis module 320 receives a signal from the camera and determines whether graffiti is occurring on the wall for monitoring. To this end, the memory unit 340 stores reference images about graffiti. Here, the reference images related to the graffiti acts refer to the images recognized as performing the graffiti act. For example, an image of a person spraying lacquer spray or paint spray may be such a reference image. The image analysis module 320 compares the images taken by the camera with the reference images and determines that graffiti is occurring when the similarity is higher than a predetermined level.

The central processing unit 330 receives the results analyzed by the chemical component analysis module 310 and the image analysis module 320 and performs processing according to the analysis results. When the chemical component is detected by the chemical component detection module 310 or more than the reference value, or when the graffiti action is determined by the image analysis module, the central processing unit 330 displays the video photographed by the camera 100. At least one of storing in the memory unit 340 and informing the outside that graffiti is occurring with or without the recorded video through the LAN port 350 or the I / O port 360. Perform

The memory unit 340 stores the results processed by the chemical component analysis module 310, the image analysis module 320, and the central processing unit 330, and also stores data used for such processing. Of course, the memory unit 340 also stores a program that defines the processing of the chemical component analysis module 310, the image analysis module 320 and the central processing unit 330 according to the present invention.

The LAN port 350 allows the main body 300 to communicate with the outside through the Internet network 400 or the Internet network. At this time, the outside may be a remote monitoring system. The remote monitoring system may be a central control system that receives and controls the image and graffiti behavior occurrence notification signal transmitted from the main body 300. This central control system is to display the image received from the graffiti monitoring system according to the present invention installed in various areas on one monitor or multiple monitors so that the monitoring personnel can take appropriate action. The central control system may store the received image in an external memory such as a hard disk and use it as evidence for later use, and transmit such image to a person in real time or in real time at the same time. In addition, the central control system when the speaker is installed in or separate from the graffiti feeling system of the present invention can operate the speaker of the region where the graffiti act occurred, can perform a warning broadcast about stopping the graffiti act. Of course, such warning broadcasts will be carried out by surveillance personnel managing the central control system.

In addition, when the police station has built an automatic report reception system with a computer system that communicates with the outside, such an outside may be an automatic report reception system of the police station.

The I / O port 360 connects the main body 300 to an external device. In particular, the main body 300 calls the report reception system of the police station through the telephone network 500 to report that graffiti is occurring. To be able. Such an I / O port 360 is a computer system in the police station, even if the automatic report reception system is not built, the body automatically calls the police station through the I / O port 360 to the memory unit 340 in advance It may be to report to the police station that the graffiti is occurring by voice outputting the stored contents.

3 to 5, an operation example of the doodle monitoring system of the present invention will be described in detail.

First, an operation example of the chemical component analysis module 310 will be described with reference to FIG. 3. The chemical component analysis module 310 receives a signal regarding the chemical component detection concentration from the chemical component detection sensor 100 (step S100). Then, the chemical component analysis module 310 compares the chemical component detection concentration with the reference value with reference to the reference value stored in the memory unit 340 (step S110). If the chemical component detection concentration is greater than or equal to the reference value, the chemical component analysis module 310 determines that graffiti has occurred and transmits the result to the central processing unit 330 (step S120). Then return to step S100 to repeat the same procedure. On the other hand, if the chemical component concentration is less than the reference value, the chemical component analysis module 310 determines that graffiti has not occurred and transmits the result to the central processing unit 330 (step S 120). After that, the process returns to step S100 and the repeated procedure is repeated.

Next, an operation example of the image analysis module 320 will be described with reference to FIG. 4. The image analysis module 320 receives a captured image from the camera 200 (step S200). Thereafter, the image analysis module 320 determines whether the captured image is similar to the reference images by referring to the reference images stored in the memory unit 340 (step S210). In this case, even if the captured image does not completely match the reference images, the captured image may be set to be similar to the reference images if the reference images have a predetermined value or more, for example, 80% or more. If the captured image is similar to the reference image, the image analysis module 320 determines that graffiti has occurred and transmits the result to the central processing unit 330 (step S220). Then return to step S100 to repeat the same procedure. On the other hand, if the captured images are not similar to the reference images, the image analysis module 320 determines that graffiti has not occurred and transmits the result to the central processing unit 330 (step S 120). After that, the process returns to step S100 and the repeated procedure is repeated.

Next, referring to FIG. 5, an operation example of the central processing unit 330 is received. The central processing unit 330 receives the analysis result from the chemical component analysis module 310 and the image analysis module 320 (step S300). . Then, the central processing unit 330 returns to step S300 without performing any processing in the case where both the chemical component analysis module 310 and the image analysis module 320 determine that the graffiti act does not occur (step S310). Continue. On the other hand, the central processing unit 330 determines that only one of the chemical component analysis module 310 and the image analysis module 320 has graffiti occurred, and the other determines that the graffiti has not occurred (step S320 and step S320). In operation S330, only an operation of storing the captured image in the memory unit 340 is performed (step S350). Then return to step S300 to continue the procedure. On the other hand, when the central processing unit determines that both the chemical component analysis module 310 and the image analysis module 320 have graffiti action occurred (step S340), the graffiti action occurred while storing the captured image in the memory unit 340. The act of notifying the outside is performed (step S360). Then return to step S300 to continue the procedure. In FIG. 5, X means that the chemical component analysis module and the image analysis module have determined that no graffiti has occurred, and o means that the graffiti has occurred.

The graffiti monitoring system 10 according to the present invention has high reliability because it notifies the graffiti occurrence to the outside only when the chemical component analysis module and the image analysis module determine that the graffiti behavior is occurring at the same time. Such high reliability makes it possible to effectively prevent graffiti.

As a more specific example, FIG. 6 shows a configuration diagram of a specific example of the graffiti monitoring system of the present invention, and FIG. 7 shows a state where the graffiti monitoring system of FIG. 6 is installed on the wall.

The camera is installed in the main body, and the chemical detection sensor is installed in the sensor box. The sensor box is connected to the main body by a cable. The sensor box is installed at the bottom of the sensor without protruding to the outside, and the sensor box has a threaded hole at the left and right sides and the upper part, so that the steel pipes commonly sold in US building materials departments such as Home Depot remain intact. Can be installed on the wall by connecting. In particular, the shape of the sensor box is designed to be similar to the wire metal box commonly available at Home Depot so that it can be hidden from passers-by. By installing a set of graffiti monitoring system shown in Figure 7 can cover a wall about 10 meters, the camera of the main body monitors whether roaming occurs in the designated area. The central processing unit of the main body notifies the occurrence of the graffiti behavior when the graffiti behavior occurrence signal by the chemical component detection sensor and the camera is detected.

FIG. 8 shows the state of the graffiti sensing system of FIG. 6 installed on each of several walls, and a high magnification camera is installed on the opposite side of the wall, FIG. 9 shows the state of graffiti sensing system of FIG. It is a figure which shows the example which the high magnification camera installed on the opposite side with respect to the wall surface where graffiti activity takes place in the state which installed the high magnification camera on the opposite side of the said wall surface.

As shown in Figure 8 and 9, the graffiti monitoring system of the present invention may further include a high magnification camera for photographing the wall on the opposite side of the wall. Here, the high magnification camera means a camera that can shoot at a higher magnification than a camera installed in a main body or installed in a basic configuration. The high magnification camera used may be a high magnification PTZ camera. Then, the central processing unit of the graffiti monitoring system according to the present invention, if both the chemical component detection module and the image analysis module determines that the graffiti action is occurring, the high magnification camera is a signal that the graffiti action occurs by sending a signal to the high magnification camera. It may be to photograph the wall. This high magnification camera makes it possible to capture graffiti more clearly and use it as evidence later. One high magnification camera is not only applied to one set of graffiti surveillance systems, but may be applied to several sets of graffiti surveillance systems, as shown in FIG. The number of graffiti surveillance systems to which high magnification cameras are applied depends on the terrain structure, such as the performance of the high magnification cameras and the layout of the walls.

10: Graffiti Surveillance System 20: Wall
100: chemical component detection sensor 200: camera
300: main body 310: chemical composition analysis module
320: image analysis module 330: central processing unit
340: memory unit 350: LAN port
360: I / O port 400: Internet network
500: telephone network

Claims (6)

A chemical component sensor for detecting chemical substances contained in lacquer sprays or paint sprays sprayed on walls and drawing or graffitiing;
A chemical component analysis module configured to receive a signal from the chemical component detection sensor and analyze a detection degree of the chemical component;
A camera for photographing the wall to be monitored and its surroundings;
An image analysis module configured to receive a signal from the camera and determine whether an act of painting or graffiti is applied to the wall by lacquer spray or paint spray;
A central processing unit which receives a result analyzed by the chemical component analysis module and the image analysis module and performs processing according to the received analysis result;
A memory unit for storing result data by processing of the central processing unit and data used for processing of the central processing unit; And
It includes a communication unit for transmitting the processing result of the central processing unit to the outside via the Internet, Internet or telephone network,
When the central processor detects that the chemical component is detected by the chemical component detection module or more than the reference value or the act of painting or graffiti on the wall by lacquer spray or paint spray by the image analysis module, At least one of storing a video photographed by the camera in the memory unit and notifying the outside that graffiti is occurring on the wall with or without the photographed video through the communication unit; Doodle monitoring system through the chemical component detection and image analysis, characterized in that to carry out. The method of claim 1,
Only when the chemical component is detected above the reference value by the chemical component detection module or when the act of painting or graffitiing the wall with lacquer spray or paint spray by the image analysis module is occurring. When the occurrence occurs, the central processing unit performs only an operation of storing the moving picture photographed by the camera in the memory unit, and when the chemical component is detected by the chemical component detection module above the reference value and by the image analysis module. When it is judged that painting or graffiti is performed by lacquer spray or paint spray on the wall, when all of the occurrence occurs, the central processing unit stores the video photographed by the camera in the memory unit and through the communication unit. remind The happening that graffiti surveillance system with video detection and analysis of chemical composition of that feature to perform all actions in informing the external graffiti acts youngdoen the wall with no video or the video shoot. 3. The method of claim 2,
The outside of the central processing unit to inform that the graffiti action is occurring, the graffiti monitoring system through the chemical component detection and image analysis, characterized in that any one or both of the remote monitoring system and the police report receiving system. 4. The method according to any one of claims 1 to 3,
The chemical component detection sensor is a graffiti monitoring system through the chemical component detection and image analysis, characterized in that for detecting volatile organic compounds contained in lacquer spray or paint spray. 4. The method according to any one of claims 1 to 3,
The image analysis module compares the images photographed by the camera with a lacquer spray or a paint spray on a wall with reference images stored in the memory unit when the similarity is higher than a predetermined level. Graffiti monitoring system through the chemical component detection and image analysis, characterized in that it is determined that the act of painting or graffiti by lacquer spray or paint spray on the wall. 3. The method of claim 2,
The graffiti monitoring system further includes a high magnification camera that photographs the wall from the opposite side of the wall, and the central processing unit determines that the graffiti action is occurring when both the chemical component detection module and the image analysis module determine that the graffiti is occurring. The graffiti monitoring system through chemical component detection and image analysis, characterized in that the high magnification camera to shoot the wall by transmitting a signal to the camera.

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