JPH0384698A - Intruder monitoring device - Google Patents

Abstract

PURPOSE:To detect, search and trace an intruder with less television cameras by automatically obtaining the photograph picture of an intrusion section by means of the television cameras based on detection information from sensors, identifying the attribute of the intruder from the picture and controlling search and trace. CONSTITUTION:The television cameras 21-2k which set the detection ranges of the sensors 11-1n to be photograph ranges by the abnormality detection of the sensors 11-1n are automatically started, and the intruder is identified from the other animals from the photograph picture of the cameras 21-2k. The intruder is displayed in a display part 9, an alarm is given and the moving direction and moving amount of the intruder are obtained from the photograph picture. The directions of the cameras 21-2k are controlled and the intruder is automatically searched and traced. Thus, an intruder monitoring device which facilitates the detection and the search trace monistory of the intruder with less the installation number of the television cameras is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an intruder monitoring device for detecting and monitoring intruders into monitoring areas such as buildings and various other facilities.

B1 Overview of the Invention The present invention provides an intruder monitoring device that detects and monitors intruders using a television camera.Based on detection information from a sensor, the television camera automatically obtains a photographed image of an intrusion section, and this image is By identifying the intruder's attributes and performing search and tracking control, it is possible to easily detect, search, and track the intruder while reducing the number of television cameras.

C1 Conventional technology Conventional intruder monitoring devices for the purpose of crime prevention and disaster prevention use sensors to detect abnormalities within the monitored area, and use this detection signal to issue an alarm from a buzzer in the monitoring room, etc. There will be a system in which people will travel to their locations and check on surveillance television. In these systems, a large number of sensors are placed within a monitoring area, and the positions of the sensors are correlated with abnormal locations in a monitoring room, thereby recognizing abnormal locations in response to alarms. In addition, in the system using surveillance television, a large number of television cameras are distributed in order to monitor the entire area within the surveillance area, and each video signal can be switched and displayed on the monitor television in the surveillance room or displayed simultaneously on multiple monitor televisions to detect abnormalities. The location will be monitored.

D1 Problems to be Solved by the Invention In conventional monitoring systems, sensors cannot distinguish between humans and non-human animals or objects, so in the former method, the problem is detected only after a supervisor rushes to the scene in response to an abnormality detection signal from the sensor. There was a problem in that when the abnormal situation became known, confirmation of the cause of the abnormality was delayed, and even if there was a false alarm, the operator had to rush to the scene.

On the other hand, in the latter monitoring method, when an abnormality is detected by a sensor, the guard can learn the situation in the area on a monitor TV, but in order to capture intruders without blind spots, a large number of TV cameras must be installed. Along with this, the number of monitor TVs will also increase. Additionally, searching for and tracking an intruder is troublesome and difficult, as it involves operating a television camera toward the intruder.

SUMMARY OF THE INVENTION An object of the present invention is to provide an intruder monitoring device that facilitates detection, search, and tracking of intruders while reducing the number of television cameras installed in a surveillance system using television cameras.

Means and Effects for Solving E0 Problems In order to achieve the above object, the present invention includes a group of sensors that are arranged at the peripheral boundary of a monitoring area and each detects an abnormality, and a sensor group that swings the detection range of the plurality of sensors. A plurality of television cameras that can take pictures under control, a control information storage unit that stores data associating the sensor group with the photographing range of the television cameras, and a moving object identification unit that identifies a moving object from images taken by the television cameras. and when an abnormality is detected in one of the sensors in the sensor group, a television camera having a shooting range of the sensor starts to take a picture based on the data in the storage part, and the identification part uses the taken image to identify the intruder. A sensor comprising: a control unit that performs search and tracking control using the television camera; a display unit that displays images captured by the television camera; and an alarm generating unit that generates an alarm when the identification unit identifies an intruder. When an abnormality is detected, a TV camera that captures the detection range of the sensor is automatically activated, the intruder and other animals are identified from the images taken by the camera, the intruder is displayed on the display, and an alarm is issued. , determine the direction and amount of movement of the intruder from the captured images, control the direction of the television camera, and automatically search for and track the intruder.

F. Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention. Sensor 1. ．． 1. , In are provided at least one for each subdivision into which the peripheral area of the monitoring area is divided, and detect abnormalities within each subdivision. This sensor is, for example, an infrared sensor or an ultrasonic sensor to detect abnormalities within the assigned section. The television cameras 21 to 2 are configured to be able to photograph a plurality of small sections in which a plurality of sensors are installed, respectively, with a swing function, and are arranged to have photographing ranges that overlap with the adjacent television cameras.

FIG. 2 exemplifies the positional relationship between the sensors 11-In and the television cameras 2I-2. -18 are the detection sections (line L1) along the peripheral boundary (indicated by line) of the monitoring area.
~L8) is detected. On the other hand, TV camera 2. and 2. are divided by the angle ±θL and the swing of the ±θ machine from the reference axis X1X2, respectively, and 1 to L! , L, to L8. Such a positional relationship between the sensor and the television camera is stored as table data in a control information storage section, which will be described later. The table below shows the positional relationship.

Also, TV camera 2. 2, is stored in the control information storage unit along with the positional relationship with the adjacent television camera and the swing rotation angle information. The table below shows the positional relationship of the TV cameras.

Next, when the sensor correspondence section 3 takes in the abnormality detection signals from each of the sensors II to In, it gives the number data of the sensor concerned to the control section 4. The control unit 4 refers to the positional relationship table (above table) in the control information storage unit 5, obtains the TV camera number that can take pictures of the section corresponding to the number of the abnormality detection sensor, and
The TV camera number and rotation angle from the reference axis are stored. Then, the control section 4 sends the television camera number and rotation angle data to the television camera correspondence section 6, and also gives an identification processing command to the moving object identification section 7. The TV camera corresponding section 6 selects the TV camera 2. corresponding to the given TV camera number. ~
The 2K is given power-on, angle control (angle in the direction of the abnormality detection sensor), and imaging start control signals to the 2K.

The video distribution section 8 supplies the video signal from the television camera that has started photographing to the moving object identification section 7 and also to the display section 9. The display unit 9 is caused to display the photographed image.

The moving object identification unit 7 identifies a moving object and a moving method from the supplied video signal.

FIG. 3 shows a block diagram of the moving object identification section 7. As shown in FIG.

The video signal given from the video distribution section 8 is sent to the A/D conversion section 7.
1, it is converted into a dinotal signal and sent to the control unit 7 as an image
2 is stored in the image storage unit 73. At the same time, the video signal after the elapse of time Δ is also stored in the image storage unit 73 as an image ■. Upon completion of the accumulation of the image ■, the control unit 72 instructs the moving object detection unit 74 to detect a moving object from the two pieces of image information I and ■. The moving object detection section 74 is
A moving object is detected using a processing method similar to motion compensation processing in video band compression encoding.

For example, Television Society Journal Vol. 1.42 N.

111988.11 PP, 1206-1207 can be used. That is, after image ■ and time △ as shown in FIG. Detects moving objects by detecting blocks with high This process can be performed several times per second or more.

Next, the moving direction detection unit 75 determines the moving direction and amount of movement of the moving object using the correspondence between the rectangular blocks of the two images. In this detection process, the coordinates indicating the representative point of the corresponding rectangular blocks of images I and H are given (for example, the coordinates indicating the upper left pixel of the rectangular block), and the movement of the moving object is determined based on the position change of the corresponding one of this coordinate data. Find the direction and amount of movement.

For example, as shown in Figure 5, the coordinate numbers indicating representative points are associated with images I and It is determined that this is the amount of movement.

Next, the object attribute identification unit 76 performs a moving object attribute identification process using the coordinates indicating the representative point of the rectangular block. This attribute identification takes advantage of the fact that the outline of the representative point coordinate group is vertically long for humans, whereas that of animals such as dogs and cats is horizontally long, and the outline of the representative point coordinate group is Group X, Y
Maximum value in the axial direction Y7max, Ylmax, X tm
ax, Xzmax and minimum value YzminY1min, X
Find tmin, X1m1n, or if
If the attribute is below, the attribute is identified as an animal other than a human.

Note that if the identification is uncertain after one process, it can be handled by repeating the process multiple times.

Returning to FIG. 1, data on the moving direction, amount of movement, and attributes of the object determined by the moving object identification section 7 are provided to the control section 4. The control unit 4 uses the data to control the television camera 2. Along with the rotation operation in ~2, the alarm generation section IO and alarm response section II
The alarm generation control of the alarm devices 12 to 12J is performed through the alarm.

In the above-mentioned control, first, when the attribute data indicates a person, it is determined that the intruder is present, and an alarm is generated from the alarm generation unit 1o and the alarm devices 121 to 12J. This alarm may be generated from all the alarms 4, or only the corresponding alarm may be generated by associating the alarm 4 with the television camera. Further, the content of the alarm is not limited to the alarm buzzer, and the content of the alarm can also be generated by a synthesized sound using a voice synthesizer.

Next, using the moving direction and movement amount data of the object, the television camera number stored in the storage unit 5, and the rotation angle data from its reference axis, the control unit 4 controls the rotation angle θ of the television camera.
1 and the direction, it is determined whether the angle θ1 satisfies θ1o≦01≦01+, and when it is satisfied, the camera is controlled to swing through the television camera corresponding section 6. If not satisfied, search for the adjacent TV camera number from the data table mentioned above, store the TV camera number currently stored in the control unit 4 and its rotation angle from the reference axis in the history table, and then use the data just found (the rotation angle is The new television camera number is rewritten using the standard M), the new television camera number is sent to the television camera correspondence section 6, the television camera is switched, and the tracking operation is continued.

When terminating the pursuit of the intruder, the instruction section 13 instructs the control section 4 to perform initial settings. In response to the initial setting instructions, the control unit 4 uses the history table to return all television cameras to their initial positions, and also returns the moving object identification unit 7 to its initial state, thereby placing the system in a standby state. It should be noted that the display section 9, the instruction section 13, and the alarm generation section 10 can be installed in a remote center via a transmission line to achieve the same effect.

G1 Effects of the Invention As described above, according to the present invention, when an abnormality is detected by a sensor, a television camera is automatically operated in the detection area of the sensor to automatically take a photograph, and from this photographed image, it is possible to distinguish between an intruder and other animals. However, the intruder is tracked by detecting the direction and amount of movement from the image and controlling the direction of the camera, making it possible to automatically search and track the intruder while reducing the number of TV cameras installed. Search and search
This has the effect of facilitating tracking and monitoring.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a positional relationship diagram of a sensor and a television camera in the embodiment, Fig. 3 is a block diagram of a moving animal identification section in the embodiment, and Fig. 4 is a block diagram showing an embodiment of the present invention. FIG. 5 is a state diagram of a moving object search in the embodiment. FIG. 5 is a state diagram of image processing of representative point coordinates in the embodiment. 1+, In...sensor, 212k...TV camera,
4.Control unit, 5.Control information storage unit, 7.Moving object identification unit, 8.Video distribution unit, 9.Display unit, IO.
- Alarm generating section, 12. ．． 12J...alarm, 71...
A/D conversion section, 72...control section, 73...image storage section, 4. moving object detection section, 75.. moving direction detection section, 6. object attribute identification section. Figure 1: Block diagram of the embodiment Figure 2: Positional relationship diagram of the sensor and TV camera

Claims (1)

[Claims] (1) A group of sensors arranged at the peripheral boundary of the monitoring area to detect abnormalities, a plurality of television cameras capable of photographing the detection range of the plurality of sensors by swing control, and a photographing of the group of sensors and the television camera. a control information storage unit that stores data that associates a range with a moving object; a moving object identification unit that identifies a moving object from an image taken by the television camera; a control unit that starts photographing by a television camera having a photographing range of the sensor based on the data, causes the identification unit to identify an intruder using the photographed image, and controls search and tracking by the television camera; An intruder monitoring device comprising: a display section that displays a photographed image; and an alarm generating means that issues an alarm when the identification section identifies an intruder.