KR101939202B1 - Method for monitoring illegal stopping and parking vehicle using CCTV - Google Patents

Abstract

Disclosed is a method for monitoring illegally stopped and parked vehicles using a CCTV which accurately senses illegally stopped and parked vehicles. The method for monitoring illegally stopped and parked vehicles using a CCTV comprises: a step of using a CCTV installed on a road to monitor an illegally stopped and parked vehicle, and setting a monitoring area on an image of the road photographed in a first zoom state of the CCTV; a step of determining whether the vehicle enters the monitoring area; a step of storing the image of the CCTV photographed in the first zoom state as a first stop image if the vehicle enters the monitoring area; a step of extracting a license plate area of the vehicle from the first stop image; a step of zooming the CCTV in to a second zoom state from the first zoom state to place the extracted license plate area on a center area of the image; a step of storing the image of the CCTV photographed in the second zoom state as a second stop image; a step of extracting image information of the license plate area of the vehicle from the image of the CCTV photographed in the second zoom state; a step of zooming the CCTV out to a third zoom state from the second zoom state to place an image corresponding to the extracted image information of the license plate area of the vehicle on the center area; and a step of storing the image of the CCTV photographed in the third zoom state as a third stop image.

Description

Technical Field [0001] The present invention relates to a method for monitoring illegal parking vehicles using CCTV,

The present invention relates to a method of monitoring an illegal parking vehicle using CCTV, and more particularly, to a method of monitoring a vehicle illegally parked on a road by using CCTV.

Illegal parking regulation system is defined as a system to control illegal parking vehicles by arranging police officers or installing cameras in illegal parking areas in order to eradicate illegal parking vehicles that interfere with the smooth flow of traffic.

In recent years, the spread of vehicles has increased exponentially in contrast to limited roads, and traffic congestion has become a social problem. Especially, illegally parked vehicles on roads with high traffic volume have not only impeded the flow of vehicles while they are running, And it is possible to cause traffic accidents. Therefore, thorough crackdown on illegal driving cars is required.

Accordingly, the government and related organizations are constantly controlling the illegal parking by arranging the registrants. However, this method has a structural limitation that the labor cost and the cost are large, and the difference in the enforcement rate is large depending on whether or not the regulators are deployed.

In order to solve these problems, illegal parking control system which implements a camera in a prohibited driving area to acquire images by performing shooting when an illegally parked car is detected and analyzes the acquired images to recognize the car number and imposes a fine And is widely used.

Korean Patent Publication No. 10-2017-0127960

The present invention provides a monitoring method of illegal parking vehicles using CCTV, which can precisely detect an illegally parked vehicle and prevent the occurrence of disputes due to interception.

A method of monitoring illegal parking vehicles using CCTV according to the present invention comprises the steps of: monitoring illegal parking vehicles using CCTV installed on the road; setting a monitoring zone in the image of the road photographed in the first zoom state of the CCTV; Determining whether the vehicle enters the monitoring area; Storing an image of the CCTV photographed in the first zoom state as a first still image when the vehicle enters the monitoring area; Extracting a license plate area of the vehicle from the first still image; Zooming the CCTV from the first zoom state to the second zoom state such that the extracted number plate region is located in a central region of the image; Storing an image of the CCTV photographed in the second zoom state as a second still image; Extracting image information of the license plate area of the vehicle from the image of the CCTV photographed in the second zoom state; Zooming out the CCTV from the second zoom state to the third zoom state such that an image corresponding to image information of the license plate area of the extracted vehicle is located in a central region; And storing an image of the CCTV photographed in the third zoom state as a third still image.

The step of extracting the image information of the license plate area of the vehicle may include extracting color and brightness information of each pixel of the license plate area image of the vehicle and extracting color and brightness information of the license plate area of the vehicle from the color and brightness information of the extracted pixel, And the step of zooming out the CCTV from the second zoom state to the third zoom state extracts color and brightness information of each pixel of the image photographed in the CCTV in the third zoom state, An area coinciding with the image pattern information of the license plate area of the vehicle captured in the CCTV in the zoom state may be located in the central area.

Storing an image of the CCTV photographed in the first zoom state as a fourth still image after a lapse of a predetermined reference time; Storing an image of the CCTV photographed in the second zoom state as a fifth still image; And storing the image of the CCTV photographed in the third zoom state as a sixth still image, wherein the license plate information of the vehicle in the second still image and the license plate information of the vehicle in the fifth still image, And if the license plate information of the vehicle does not match the license plate information of the vehicle in the second still image and the license plate information of the vehicle in the fifth still image, The first to sixth still images can be deleted.

The step of setting the surveillance zone on the image of the road photographed in the first zoom state of the CCTV may include extracting a mark of the road indicated in the image and setting the surveillance zone on the basis of the mark of the road , And the step of determining whether the vehicle enters the monitoring area may use a mark change of the road appearing in the image.

The step of determining whether or not the vehicle enters the monitoring area may include a step of displaying an image of the road displayed on the image captured in a state in which the vehicle is not parked in the monitoring area, The number of vehicles entering the monitoring area and the size of the vehicle can be estimated by comparing markings of the roads displayed on the photographed image.

In addition, information on the elapsed time from the time when the first still image is stored can be displayed by the laser in the vehicle or the monitoring area.

According to the present invention, it is possible to secure the peripheral information of the road on which the vehicle is parked and the license plate information of the vehicle through the still image photographed in the first zoom state, the second zoom state, and the third zoom state of the CCTV, The occurrence can be prevented in advance.

1 is a view schematically showing a monitoring system of illegal parking vehicles using CCTV according to an embodiment of the present invention.
FIG. 2 and FIG. 3 are flowcharts illustrating a method of monitoring illegal parking vehicles using CCTV according to an embodiment of the present invention.
4 to 6 show CCTV images sequentially photographed according to an embodiment of the present invention.
7 to 9 show CCTV images sequentially photographed according to another embodiment of the present invention.
FIGS. 10 and 11 are diagrams for explaining the setting of the monitoring zone and the step of determining whether or not the vehicle is entered according to another embodiment of the present invention.
12 is a diagram illustrating a method of monitoring an illegal parking vehicle using CCTV according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thicknesses of the films and regions are exaggerated for an effective explanation of the technical content.

Also, while the terms first, second, third, etc. in the various embodiments of the present disclosure are used to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. Thus, what is referred to as a first component in any one embodiment may be referred to as a second component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment. Also, in this specification, 'and / or' are used to include at least one of the front and rear components.

The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprises " or " having " are intended to specify the presence of stated features, integers, Should not be understood to exclude the presence or addition of one or more other elements, elements, or combinations thereof. Also, in this specification, the term " connection " is used to include both indirectly connecting and directly connecting a plurality of components.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The surveillance system of illegal parking vehicles using CCTV according to the present invention monitors illegal parking vehicles by using CCTV fixed on a pillar installed on the road.

1 is a view schematically showing a monitoring system of illegal parking vehicles using CCTV according to an embodiment of the present invention.

Referring to FIG. 1, an illegal parking vehicle monitoring system using CCTV includes a CCTV 100, a field unit 110, a center communication module 120, and a field controller 130.

The CCTV 100 is fixedly mounted on a pillar on the road, and photographs the sensed area. The CCTV 100 includes a camera having zoom, focusing, and pan and tilt functions.

The field unit 110 is installed in a site where the CCTV 100 is installed, and is connected to the CCTV 100 through a wired / wireless communication network. The field unit 110 includes a power supply for supplying power to the peripheral devices including the CCTV 100, an on-site communication module for connecting the communication network, and an enclosure provided for the protection of the on-site equipment, .

The center communication module 120 communicates with the field unit 110 via a wired / wireless communication network. The center communication module 120 receives image information from the field unit 110 and remotely controls the field unit 110. [

The field controller 130 controls the driving of the field unit 110 via the center communication module 120. Pan, tilt, zoom, and focusing of the CCTV 100 can be driven by the control of the field controller 130, and image capturing and photographed images can be transmitted and received.

The field controller 130 may analyze and process the received image. In addition, the field controller 130 may extract and store a still image from the received image. According to one example, the field controller 130 can set a surveillance zone on the image of the received road, and judges whether or not the vehicle enters the surveillance zone. Then, the license plate area of the vehicle can be extracted from the received image. In addition, the field controller 130 monitors the parking time of the parked vehicle in the monitoring area and can determine whether the parking time has exceeded the parking time reference time. Also, the field controller 130 can discriminate whether or not license plate information of the drive vehicle extracted from the image matches.

Hereinafter, a method of monitoring illegal parking vehicles using CCTV using the monitoring system of illegal parking vehicles using CCTV will be described in detail.

FIG. 2 and FIG. 3 are flowcharts illustrating a method of monitoring illegal parking vehicles using CCTV according to an embodiment of the present invention.

Referring to FIGS. 2 and 3, a method for monitoring illegal parking vehicles using CCTV includes: setting a monitoring area in an image of the road photographed in a first zoom state of the CCTV (S10) (S30) of storing, as a first still image, an image of the CCTV photographed in the first zooming state when the vehicle enters the monitoring area (S20) (S50) zooming in the CCTV from the first zoom state to the second zoom state such that the extracted license plate region is located in a central region of the image, extracting a license plate region of the vehicle from the still image, (S60) of storing the image of the CCTV photographed in the second zoom state as a second still image, extracting image information of the license plate area of the vehicle from the image of the CCTV photographed in the second zoom state (S70), the extracted Zooming out the CCTV from the second zoom state to the third zoom state so that the image information corresponding to the image information of the license plate area of the vehicle is located in the central region of the image (S80); and in the third zoom state And storing the photographed CCTV image as a third still image (S80).

In addition, the method of monitoring an illegal parking vehicle using CCTV may include determining whether a reference time of a pause has elapsed after storing the first still image (S100), determining whether the CCTV (S120) of extracting a license plate area of the vehicle from the fourth still image (S120), storing the image of the CCTV photographed in the second zoom state as a fifth stop (S140) of extracting license plate information of the vehicle from the fifth still image (S140), zooming out to the third zoom state so that license plate information of the vehicle is located at the center of the CCTV image (S160) of storing the image of the CCTV photographed in the third zoom state as a sixth still image (S160); comparing the vehicle license plate information in the second still image with the fifth still image vehicle (Step S170). If the license plate information of the vehicle in the second still image matches the license plate information of the vehicle in the fifth still image, the first to sixth still images are stored (S180) 1 to the sixth still image (S190).

Hereinafter, each of the above-described steps will be described in detail with reference to FIG. 3 to FIG.

4 to 6 show CCTV images sequentially photographed according to an embodiment of the present invention.

Referring to FIG. 4, the step of setting a surveillance zone SS on an image of a road R photographed in a first zoom state of the CCTV 100 includes: (SS) can be directly set.

When the monitoring area SS is set, it is determined whether or not the vehicle V enters the monitoring area SS. A motion map can be used for whether or not the vehicle V is entered. The motion map is a map that stochastically shows whether there is a motion for each pixel in the image. The motion map determines whether the motion is within the image through comparison of pixels between the frames of the image.

When the entry of the vehicle V into the monitoring area SS is confirmed, the monitoring area SS is photographed in the first zoom state of the CCTV 100 and is stored as the first still image F1. The photographing time is stored together with the first still image F1. According to the embodiment, the first zoom state of the CCTV 100 is the state in which the angle of view is the largest in the CCTV 100. When the first still image F1 is stored, the license plate area of the vehicle V is extracted from the first still image F1. The extraction of the license plate area of the vehicle V is performed by converting the first still image F1 into a gray image, filtering the gray image by Sobel filtering, Dog filtering, Laplacian filtering, filtering that masking areas irrelevant to the license plate It is possible to detect candidates of candidates with masks and license plates, to detect candidate plates, and to extract the numbers from the detected candidate plates.

The license plate area of the vehicle V extracted from the first still image F1 is mapped to the image of the CCTV 100 photographed in the first zoom state and the license plate area of the vehicle V is extracted from the image of the CCTV 100 . The CCTV 100 is zoomed in to the second zoom state as shown in FIG. 5 so that the license plate area of the vehicle V is located in the central area of the CCTV 100 image. In this process, the CCTV 100 can adjust the lens angle and zoom in accordance with the position of the license plate area of the vehicle in the photographed image.

The CCTV 100 photographs the vehicle V in the second zoom state and stores the photographed image as the second still image F2.

Then, the image information of the license plate area V1 is extracted from the second still image F2. The image information extraction of the license plate area (V1) extracts color and brightness information for each pixel of the license plate area (V1) image. And generates image pattern information of the license plate area V1 of the vehicle V from the extracted color and brightness information of each pixel. According to the embodiment, the image pattern information indicates the relative difference between the color and brightness information of each pixel and the color and brightness information with the adjacent pixels.

When the image information of the license plate area V1 is extracted, the CCTV 100 changes from the second zoom state to the third zoom state such that the image corresponding to the image information of the license plate area V1 is located in the central area Zoom out. The third zoom state has a lower depth than the first zoom state and has a higher depth than the second zoom state.

The image of the CCTV 100 photographed in the third zoom state is stored as the third still image F3.

When the first to third still images F1 to F3 are stored, the CCTV 100 waits for the reference time to elapse based on the photographing time of the first still image F1.

When the pseudo range reference time has elapsed, the monitoring area is photographed in the first zoom state of the CCTV 100 and is stored as the fourth still image F4. Then, the license plate area V1 of the vehicle V is extracted from the fourth still image F4. The extraction of the license plate area V1 of the vehicle V proceeds in the same manner as the extraction of the license plate area V1 of the vehicle V from the first still image F1.

When the license plate area V1 of the vehicle V is extracted, the CCTV 100 is zoomed in to the second zoom state such that the license plate area V1 of the vehicle V is located in the central area of the CCTV 100 image.

The CCTV 100 photographs the vehicle V in the second zoom state and stores the photographed image as the fifth still image F5.

The image information of the license plate area V1 is extracted from the fifth still image F5. The image information extraction of the license plate area V1 is performed by extracting the color and brightness information of each pixel of the license plate area V1 and extracting the image pattern information of the license plate area V1 of the vehicle V1 .

When the image information of the license plate area V1 is extracted, the CCTV 100 is zoomed out from the second zoom state to the third zoom state such that the image corresponding to the image information of the license plate area V1 is placed in the central area, The image of the CCTV 100 photographed in the zoom state is stored as the sixth still image F6.

When the first to sixth still images F1 to F6 are stored, the license plate information of the vehicle V in the second still image F2 and the license plate information V1 of the vehicle V1 in the fifth still image F5 ) Are coincident with each other. When the license plate information of the vehicle V in the second still image F2 matches the license plate information V1 of the vehicle V in the fifth still image F5, F6). On the other hand, when the license plate information V1 of the vehicle V in the second still image F2 does not match the license plate information V5 of the vehicle V in the fifth still image F5, The sixth still images F1 to F6 are deleted.

The monitoring method of illegal parking vehicles using CCTV according to the present invention acquires the first to sixth still images F1 to F6 according to the above-described procedure. The first and fourth still images F1 and F4 of the images F1 to F6 are images of the road R taken at the first zoom state and have a wide angle of view at a deep depth. This helps to understand the overall situation around the road.

The second and fifth still images F2 and F5 are images taken at the second zoom state and have a low depth of field and a narrow angle of view. The second and fifth still images F2 and F5 can accurately know the license plate information V1 of the vehicle V that has been placed in the monitoring zone SS.

If it is determined that the vehicle V is illegally parked by only the first and fourth still images F1 and F4 and the second and fifth still images F2 and F5, . This means that the license plate number information V1 of the vehicle V can not be correctly confirmed in the first and fourth still images F1 and F4 and that the vehicle is not monitored in the second and fifth still images F2 and F5 ).

The third and sixth still images F3 and F6 include license plate information V1 of the vehicle V and information on the surveillance zone together to an identifiable extent. Therefore, the first to sixth still images F1 to F6 can accurately determine whether or not the vehicle V is parked in the monitoring area SS and information on the vehicle.

As shown in FIGS. 7 to 9, the first to sixth still images F1 to F6 indicate whether or not the vehicle has been parked in the monitoring area SS even in the case where the vehicles are arranged in a line in the monitoring area SS, Information about the vehicle can be obtained accurately.

On the other hand, the present invention stores images photographed in the CCTV as still images (F1 to F6) instead of moving images, so that the data storage amount can be remarkably reduced.

FIGS. 10 and 11 are diagrams for explaining the setting of the monitoring zone and the step of determining whether or not the vehicle is entered according to another embodiment of the present invention.

Referring to FIG. 10, the step of setting the monitoring area SS in the image of the road R includes extracting the marks R 1 to R 3 of the road R shown in the image, R3 can be set as the monitoring area SS. Since the markers R1 to R3 on the road are always photographed by the CCTV 100 with image information such as a certain color and brightness, they are suitable as the setting reference of the monitoring area SS. 9, the center lane R1 and the outer lane R2 of the area where the vehicle can be parked are displayed in yellow, and the vehicle driving area R and the parking space area SS are separated by the white dotted line R3 . In the parking lot area (SS), the phrase "no parking" is displayed twice in a row.

The area R can be defined as a monitoring area SS by dividing the yellow outer lane R2 and the white dotted line R3 indicated by the captured image of the CCTV 100 into corresponding lines.

The determination as to whether or not the vehicle V has entered the monitoring area can be made by comparing images before and after the vehicle V enters the monitoring area SS. Specifically, when the vehicle V enters the monitoring area SS, an area of the CCTV 100 image is covered by the vehicle V and an area where road markings R1 to R3 do not appear occurs. 9, part of the white dotted line R3 and part of the parking prohibited phrase do not appear on the CCTV 100 image. It is possible to determine that the vehicle V is parked at the corresponding point if the marking areas R1 to R3 of the road that were previously extracted from the CCTV 100 image are not extracted thereafter.

It is also possible to estimate the number of vehicles entering the monitoring area SS and the size of the vehicle based on the location and range of the road markers R1 to R3 not extracted from the CCTV 100 image. 11, when a plurality of vehicles V are parked in the monitoring area SS, the CCTV image is covered by the vehicles V depending on the position where the vehicles V are parked and the size of the vehicle V Lie marker areas appear differently. Therefore, the number of vehicles V arranged due to the relative positional relationship between the position of the CCTV, the position of the vehicle V, and the position and the range of the markers R2, R3 covered by the vehicle V, It is possible to estimate the magnitude of the voltage (V).

The above-described method of determining the monitoring zone and determining whether the vehicle is entering the vehicle only confirms whether or not the image information of the road markers R2 and R3 among the images photographed by the CCTV 100 is changed. Therefore, The entry position, and the number of entry vehicles (V).

On the other hand, if the car owner intentionally illegally parks the vehicle, the license plate can be hidden. In this case, it is difficult to accurately extract the car number by the extraction method of the license plate area of the vehicle V described above. As a supplement to this, the license plate area can be extracted through the brightness change in the image. Specifically, when the vehicle enters the monitoring zone and stops, the vehicle stop light may be turned on, or the emergency light or the turn signal lamp may be operated during driving. In the extraction method of the license plate area of the vehicle V, the brightness information change due to the operation of the vehicle or the like is extracted from the image, the position information and the brightness information about the image pixel where the brightness change occurs, To cluster the image pixels. The image pixels are clustered into a pair, and the clustered image pixels correspond to the light position in the vehicle. The interval between the clustered image pixels can be extracted as a license plate area of the vehicle. The license plate area of the extracted vehicle may be difficult to check because the vehicle number is obscured, but the license plate area of the vehicle can be utilized as a judgment data on the illegal parking discrimination through the photographed image. This can be utilized in the case where the vehicle license plate is recognized only by extracting the vehicle number, and the vehicle license plate is not extracted so that it is difficult to recognize the license plate.

12 is a diagram illustrating a method of monitoring an illegal parking vehicle using CCTV according to another embodiment of the present invention.

Referring to FIG. 12, it is possible to display the guided vehicle time information (TS) on the vehicle V that has been parked in the surveillance area and guide the vehicle. Specifically, the laser generator (200) connected to the CCTV (100) irradiates the vehicle (V) with a laser mark (L1) indicating the elapsed time (TS) after the stop of the first still image. The laser generating unit 200 may be installed on the support 10 together with the CCTV 100 and may irradiate the laser display L1 toward the monitoring area SS. The laser generating unit 200 has a pan and tilt function so that the laser mark L1 can be irradiated to the entire area of the monitoring area SS. The laser mark L1 can be irradiated to the body of the vehicle.

Alternatively, the laser mark L2 may be displayed at the bottom TC of the zone in which the vehicle V is located in the monitoring zone SS. The laser mark TC can be displayed as time information indicating elapsed time. In addition, the laser marking TC can be inspected with different colors according to the elapsed time of the standard deviation time. According to one example, a green laser mark (TC) is displayed before the elapsed time of the drive train reference time, a yellow laser mark (TC) is displayed when the drive mark is close to the reference time of the drive train, . The laser display TC can expect the effect of encouraging the car V to move quickly to another place by recognizing the parking time information of the driver of the parking lot V. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

100: CCTV
SS: Surveillance Area
V: vehicle
V1: License plate information
F1 to F6: still image
R: Road
R1 to R3:

Claims (6)

A method for monitoring an illegal parking vehicle using CCTV installed on a road,
Setting a monitoring zone in the image of the road taken by the field controller in the first zoom state of the CCTV;
The field controller determining whether the vehicle enters the monitoring area;
When the vehicle enters the monitoring area, the field controller stores an image of the CCTV photographed in the first zoom state as a first still image;
Extracting a license plate area of the vehicle from the first still image;
Zooming the CCTV from the first zoom state to the second zoom state such that the license plate area from which the field controller is extracted lies in a central region of the image;
Storing the CCTV image captured in the second zoom state as a second still image by the field controller;
Extracting image information of the license plate area of the vehicle from the image of the CCTV photographed in the second zoom state;
Zooming out the CCTV from the second zoom state to the third zoom state such that an image corresponding to the image information of the license plate area of the vehicle from which the field controller is extracted is placed in the central region; And
And the field controller stores an image of the CCTV photographed in the third zoom state as a third still image, wherein the CCTV can be panned, tilted, zoomed and focused by the control of the field controller ,
The step of setting a surveillance zone in the image of the road photographed in the first zoom state of the CCTV includes extracting a mark of the road represented by the image and setting an area delimited by the mark of the road as the surveillance zone In addition,
The step of determining whether or not the vehicle enters the monitoring area is based on a point where the mark of the road is not extracted from the image of the road to be monitored in the first zoom state, And estimating the number of vehicles entering the monitoring area and the size of the vehicle on the basis of the position and the range of the landmark of the road. The method according to claim 1,
The step of extracting the image information of the license plate area of the vehicle includes extracting color and brightness information of each pixel of the license plate area image of the vehicle and extracting image pattern information of the license plate area of the vehicle from the extracted color and brightness information of each pixel ≪ / RTI &
The step of zooming out the CCTV from the second zoom state to the third zoom state may include extracting color and brightness information of each pixel of the image photographed in the CCTV in the third zoom state, Wherein a region of the image photographed by the camera is located in the central region of the license plate region of the vehicle. The method according to claim 1,
Storing an image of the CCTV photographed in the first zoom state as a fourth still image after the pseudo-standard reference time elapses;
Storing an image of the CCTV photographed in the second zoom state as a fifth still image; And
Further comprising the step of storing the image of the CCTV photographed in the third zoom state as a sixth still image,
Storing the first to sixth still images when the license plate information of the vehicle in the second still image matches the license plate information of the vehicle in the fifth still image,
When the license plate information of the vehicle in the second still image does not match the license plate information of the vehicle in the fifth still image, monitoring of illegal parking vehicles using CCTV to delete the first to sixth still images Way. delete delete The method according to claim 1,
And displaying the information on the elapsed time from the time when the first still image is stored to the vehicle or the monitoring area with a laser.

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