KR20080030304A - Imaging system of security camera by event detection - Google Patents

Abstract

A system and detecting and photographing an event of a monitoring camera is provided to establish a good security and monitoring system by overcoming degradation of picture quality generated when a captured image is magnified so as to be analyzed. A monitoring camera(10) is installed at a monitoring target area and captures of an image of a certain monitoring region. An event detecting unit(20) searches image information captured by the monitoring camera and detects at least one event among a plurality of events including a movement. A zoom-in camera(30) captures still images at certain time intervals of the event occurred region. An image processing unit(40) receives the captured image information from the monitoring camera, receives the captured still image from the zoom-in camera, and re-arranges and combines them by frames. A zoom-in camera controller(50) operates the zoom-in camera if an event occurs.

Description

Imaging System of Security Camera by Event Detection

1 is a block diagram schematically showing the configuration of a conventional surveillance system.

2 is a block diagram of an event detection photographing system according to the present invention;

<Description of the symbols for the main parts of the drawings>

10: surveillance camera 20: event detection unit

21: motion detection unit 22: sensor unit

30: zoom in camera 40: image processing unit

50: zoom in camera controller 60: video output unit

70: video recording unit 80: A / D converter

81: D / A converter 90: control unit

The present invention relates to an event detection photographing system of a surveillance camera, and more particularly, to detect change information generated in a surveillance region and to capture a corresponding region with a zoom-in camera to obtain an optimized still image of a moving object or change information. By outputting the recombined image by unit, it is possible to provide clear image of moving object or change information together with the existing area surveillance image without additional change of existing video storage device (VCR, DVR) and equipment. The present invention relates to an event detection photographing system of a surveillance camera that can store full information and detailed information about a surveillance region without a space.

Closed-circuit TV (CCTV) surveillance system installs a camera with at least one CCD (Charge Coupled Device) imaging element in a surveillance area and monitors the video signal from the installed camera. It is a system for monitoring a situation that occurs in the area to be monitored as a surveillance system that records the recorded image signal and then reproduces the recorded video signal through a display device.

1 is a block diagram schematically showing the configuration of a conventional surveillance system.

Referring to FIG. 1, the surveillance system includes a surveillance camera 111, a controller 120, a monitor 130, and an image recording / reproducing apparatus 140.

The surveillance camera 111 outputs an image signal captured for the surveillance region to the controller 20. The surveillance camera 111 has an adapter 111a for receiving power required for driving.

The monitor 130 is controlled by the controller 120 and displays an image signal output from the controller 120.

The image recording / reproducing apparatus 140 is controlled by the control unit 120, and controls the recording unit 120 to record the image signal output from the control unit 120 on a recording medium such as magnetic tape and the image recorded on the recording medium. And a reproducing unit for outputting. The video recording / reproducing apparatus 140 is generally a video cassette recorder (VCR).

The controller 120 controls overall operations of the surveillance camera 111, the monitor 130, and the image recording / reproducing apparatus 140 according to a control program stored in a memory unit (not shown).

In the case of a surveillance system using such a conventional surveillance camera, it is possible to acquire only comprehensive information of a corresponding area, and in case of zoom-in for a specific event with the same camera, the time gap of monitoring of the corresponding area is lost. Since it causes, it is difficult to obtain accurate information.

In addition, in the case of analyzing a specific event, if only a corresponding portion of the recorded area information is enlarged, a recognition rate may be very low due to a mosaic phenomenon or a deterioration in image quality.

In order to solve the above problems, the present invention detects change information generated in a surveillance area, photographs the area with a zoom-in camera, obtains an optimized still image of a moving object or change information, and recombines the frame unit. By outputting the video, it is possible to provide a clear image of moving object or change information along with the existing surveillance video without additional change of the existing video storage devices (VCR, DVR) and facilities, and to the surveillance zone without time gap. An object of the present invention is to provide an event detection photographing system of a surveillance camera capable of storing together the entire information and detailed information.

In order to achieve the above object of the present invention has the following features.

The present invention includes at least one surveillance camera installed in at least one surveillance target area to photograph a predetermined surveillance area; An event detection unit searching for image information captured by the surveillance camera and detecting whether at least one event occurs among a plurality of events including a motion; A zoom-in camera for capturing a still image having a predetermined time interval of the event occurrence region in the surveillance region detected by the event detector; An image processor for receiving the image information captured by the surveillance camera and receiving a still image of the event occurrence region captured by the zoom-in camera and rearranging the image by frame unit; And a zoom-in camera controller configured to receive the event from the event detector and to operate the zoom-in camera when an event occurs.

Here, at least one of an image output unit for receiving rearranged image information from the image processor and outputting the image information and an image recording unit storing the rearranged image information is further installed, and the event detection unit is configured to output the image signal output from the frame memory. And a sensor unit for detecting the movement based on the difference between the current frame and the previous frame, and at least one sensor unit for detecting a fire or an external invader.

In addition, the image information transmitted from the surveillance camera to the image processing unit and the event detection unit is converted in units of frames by an A / D converter, and further includes a D / A converter between the image processing unit and the control unit.

Hereinafter, the event detection photographing system according to the present invention will be described in detail with the accompanying drawings.

2 is a block diagram of an event detection photographing system according to the present invention.

Referring to the drawings, the imaging system according to the present invention is installed in at least one surveillance target area at least one or more surveillance cameras 10 to shoot a predetermined surveillance region, and at least one event of a plurality of events including a movement An event detection unit 20 for detecting whether or not an occurrence is detected, a zoom-in camera 30 for capturing a still image having a predetermined time interval of an event generation area in the surveillance region detected by the event detection unit 20, and the surveillance camera 10 The image processing unit 40 receiving the image information captured by the camera and receiving a still image of the event generating region captured by the zoom-in camera 30 and rearranging and recombining it by the frame unit, and generating the event from the event detecting unit 20. A zoom-in camera controller 50 for operating the zoom-in camera 30 when an event is received and whether the event occurs; and the image processor 4 A control unit 90 which receives rearranged image information from 0), an image output unit 60 controlled by the control unit 90 and outputting image information transmitted from the control unit 90, and an image recording unit storing the same. And an A / D converter 80 for converting surveillance camera image information transmitted to the event detector 20 and the image processor 40 in units of frames, and rearranged of the image processor 40. A D / A converter 81 for converting digital image information into analog image information is further included.

Here, the plurality of surveillance cameras 10 may be installed in a plurality of surveillance target areas. When a plurality of surveillance cameras are installed, the control unit 90 may receive the inputs and separately output them to the image output unit 60. Of course, only image information of the camera 10 may be output.

The image output unit 60 receives the image information of the surveillance camera 10 or the image information rearranged by the image processing unit 40 from the control unit 90 and displays it on the screen, and in general, monitors Is commonly used.

In addition, the video recording unit 70 is a medium for receiving and storing the video information of the surveillance camera 10 or the video information rearranged by the image processing unit 40 from the control unit 90 may be representatively VCR, DVR. .

Meanwhile, the event detector 20 is provided to detect whether at least one event occurs among a plurality of events including a movement. Such an event may be a movement of a shooting area, a fire, an intruder, and the like.

Therefore, when an event occurs by searching the image information received from the surveillance camera 10, the event detector 20 notifies the zoom in camera controller 50, the zoom in camera controller 50 is configured to operate the zoom in camera 30 do.

Of course, the zoom-in camera controller 50 receives the position information on the event occurrence area from the event detector 20 to control the shooting of the zoom-in camera 30 through this.

The event detector 20 detects a fire or an external intruder, and a motion detector 21 that detects the movement based on a difference between a current frame and a previous frame with respect to the video signal output from the surveillance camera 10. It consists of a sensor unit 22 having at least one sensor for.

The motion detector 21 continuously compares the current frame of the video signal output from the surveillance camera 10 with the previous frame repeatedly, and if the comparison value exceeds a predetermined condition, the motion detection unit 21 sends it to the zoom-in camera controller 50. Inform.

That is, for example, the motion detector 21 compares the motion vector of the current frame with the motion vector of the previous frame, calculates a comparison value, and detects that there is motion when the calculated comparison value is greater than or equal to a predetermined threshold value. When it is determined that there is motion, the motion detection result signal is output to the zoom in camera controller 50.

The sensor unit 22 is for checking an abnormal state of a set monitoring target area, and includes a sensor for detecting a fire occurrence and a sensor for detecting an external invader. The sensor unit 22 is installed at a predetermined position around the surveillance camera 10, and outputs the detection result signal detected by each sensor to the zoom in camera controller 50.

Meanwhile, the zoom-in camera 30 is provided to capture a still image having a predetermined time interval of the event generation area in the surveillance area detected by the event detector 20, and whether or not the zoom-in camera is captured by the zoom-in camera controller 50. in) degree, time interval between frames, shooting position and the like are controlled.

The zoom-in camera 30 captures an event occurrence area in detail, outputs a still image having a predetermined time interval, and transmits the still image to the image processor 40.

Accordingly, the image processor 40 transmits the captured image information of the surveillance camera 10 converted into digital image information through the A / D converter 80 and the zoom-in camera 30, and generates an event which is partially enlarged. It collects the still image of the part and outputs a still image obtained by recombining the two images in the frame unit, and converts the image into analog image information through the D / A converter 81 and then outputs the image output unit 60 through the control unit 90 or It is transmitted to the video recording unit 70.

Since the output image of the zoom-in camera 30 which is image information optimized for the image information of the existing surveillance camera 10 by the event detection unit 20, the zoom-in camera 30 and the image processing unit 40 of the present invention is recombined Therefore, the entire information and detailed information about the surveillance area are stored together without time gap.

Meanwhile, as described above, the zoom-in camera controller 50 controls to operate the zoom-in camera 30 when it is determined that an event has occurred by receiving the event detection signal of the event detector 20.

The zoom-in camera controller 50 may be provided with a separate key input unit so that the zoom-in camera controller 50 may be set in relation to the operation or manipulation of the zoom-in camera 30.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. .

Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The existing video storage device (VCR) is configured by detecting change information generated in the surveillance area and capturing the area with a zoom-in camera to obtain an optimized still image of a moving object or change information and outputting the recombined image by frame unit. It can provide clear image of moving object or change information with existing area monitoring image without additional change of DVR and equipment, and can store full information and detailed information about monitoring area without time gap.

In addition, it is possible to overcome the deterioration of the image quality generated when the image taken from the existing single camera is enlarged for analysis purposes, to build a better security and surveillance system, and to improve the arrest rate in the event of a crime and promote the excellence of security equipment. You can expect crime prevention effects.

Claims (5)

At least one surveillance camera installed in at least one surveillance target region to photograph a predetermined surveillance region; An event detection unit searching for image information captured by the surveillance camera and detecting whether at least one event occurs among a plurality of events including a motion; A zoom-in camera for capturing a still image having a predetermined time interval of the event occurrence region in the surveillance region detected by the event detector; An image processor for receiving the image information captured by the surveillance camera and receiving a still image of the event occurrence region captured by the zoom-in camera and rearranging the image by frame unit; And a zoom-in camera controller configured to operate the zoom-in camera when an event occurs by receiving an event occurrence from the event detection unit. The method of claim 1, A control unit for receiving the rearranged image information from the image processing unit is further installed and controlled by the control unit, an image output unit for receiving and outputting the image information from the control unit, and further comprising an image recording unit for storing the monitoring Camera's event detection system. The method of claim 1, The event detector, A motion detector for detecting the motion based on a difference between a current frame and a previous frame with respect to the video signal output from the frame memory; Event detection system of the surveillance camera comprising a sensor unit having at least one sensor for detecting a fire or an external intruder. The method of claim 1, And the image information transmitted from the surveillance camera to the image processor and the event detector is converted in units of frames by the A / D converter. The method of claim 2, And a D / A converter is further included between the image processor and the controller.

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