JPH056420A - Intrusion supervisory unit - Google Patents

Abstract

PURPOSE:To obtain a highly reliable supervisory unit causing no burden of a monitor by checking whether the change of an image is caused by an intruder or not and then deciding to just threaten the intruder or to give an alarm to the supervisory. CONSTITUTION:The analog video signal photographed by a camera 1 undergo various types of processing, and a binary image is obtained through a binarization processing part 5. Then the area and the moving speed of a changed image are obtained to binary image data at a feature value extracting part 6. A deciding processing part 9 decide whether only a threat signal output part 3 or an alarm output part also should be actuated 10 based on the feature value outputted from the part 6. Then each device is actuated. The part 10 produces an alarm to inform a supervisor of the presence of an intruder. Then a threat signal output part 30 threatens the intruder. In such a constitution, a highly reliable intrusion supervisory unit is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intrusion monitoring device which detects the presence or absence of an unauthorized intruder or an inadvertent intruder by using digital image processing and issues an alarm.

[0002]

2. Description of the Related Art FIG. 4 shows, for example, the 32nd IPSJ National Convention Proceedings (P. 2043-2, the first half of 1986).
FIG. 24 is a block diagram showing the configuration of the conventional intrusion monitoring device shown in 044). In the figure, 1 is a camera, and 2 is an A / D that converts an analog video signal sent from the camera 1 into digital image data (hereinafter referred to as image data).
A converter, 3 is a background memory that stores image data as a background image, 4 is a difference processing unit that calculates a difference between the background image and newly input image data, and 5 is a threshold value for the output of the difference processing unit 4. The binarization processing unit 9 which binarizes the image data, the judgment processing unit 9 which processes the binary image data output from the binarization processing unit 5 and judges whether there is an intruder, and the judgment processing unit 10 which is the result of the judgment It is an alarm output unit that issues an alarm when it is recognized that there is.

Next, the operation will be described. The image captured by the camera 1 is input to the A / D converter 2 as an analog video signal, and the A / D converter 2 digitizes the video signal and converts it into image data. The background memory 3 stores the image data as background image data. The difference processing unit 4 performs difference processing between the background image data and the image data sequentially input for each pixel. Binarization processing unit 5
Is the output of the difference processing unit 4 with a preset threshold value of 2
Quantify. The determination processing unit 9 obtains, for example, the area of the change region in the binary image data sent from the binarization processing unit 5 (counts the number of pixels), and determines the presence or absence of an intruder based on the size. . The alarm output unit 10 issues an alarm when the determination processing unit 9 determines that there is an intruder.

[0004]

Since the conventional intrusion monitoring system is constructed as described above, even if a tree branch sways in the image due to wind or a mere passerby is detected, it is detected as an image change. However, there was a problem in that it was mistakenly judged that there was an intruder and a false alarm was issued.

The present invention has been made in order to solve the above-mentioned problems. In the case of a false alarm, only the threatening signal output section is operated without notifying the surveillance staff of an alarm. If this is a false alarm, An object of the present invention is to provide a highly reliable intrusion monitoring device in which a threatening signal output unit gives up the intrusion operation of an intruder even when there is a true intruder without imposing a burden on the observer.

[0006]

An intrusion monitoring apparatus according to the present invention includes a feature amount extraction processing unit for obtaining a feature amount of a change area of an image, an alarm output unit for notifying a guard to an alarm, and an intruder. A threatening signal output unit for issuing an alarm to the user and a determination processing unit for issuing an alarm by determining whether to operate only the threatening signal output unit or the alarm output unit according to the feature amount of the image change It is a thing.

Further, when the threatening signal output unit is a spotlight, the intrusion position calculating unit for obtaining the position of the image change by the intruder and the posture control for changing the direction of the threatening signal output unit so as to face the position Section.

Further, not only a threatening signal output section for intimidating an intruder but also a color camera and an image recording device such as a VTR are provided to leave evidence that the intruder has invaded.

[0009]

The feature amount extraction processing unit according to the present invention checks whether the image change is like an intruder. The determination processing unit determines whether to operate only the threatening signal output unit that threatens the intruder or the alarm output unit that notifies the alarm to the surveillance staff based on the result, and operates each device. The intimidating signal output unit intimidates a true intruder and gives up the intrusion.

Further, the intrusion position calculation unit calculates the position where the image has changed, and the posture control unit changes the direction of the threatening signal output unit so that the threatening signal output unit faces the position where the intrusion occurs. Further, even if the intruder moves, the threatening signal output unit is made to follow the movement of the intruder.

A color camera also provides more information about who an intruder is, and an image recording device leaves evidence that an intruder has entered.

[0012]

【Example】

Example 1. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and 1 to 5 and 9 and 10 are exactly the same as the conventional device. Reference numeral 6 denotes a feature amount extraction processing unit that extracts feature amounts such as area and moving speed of the binary image data sent from the binarization processing unit 5, and 30 applies a spotlight to an intruder. Sound the siren,
It is a threatening signal output unit that gives an alert that calls attention and threatens you, giving up intrusion.

Next, the operation will be described. The analog image signal photographed by the camera 1 is subjected to various processes, and the binarization processing unit 5 obtains binary image data as in the conventional device. With respect to the binary image data, the feature amount extraction unit 6 obtains the area of the changed image and the moving speed. The determination processing unit 9 determines whether to operate only the threatening signal output unit 30 or the alarm output unit 10 based on the feature amount output from the feature amount extraction unit 6, and then operates each device. The alarm output unit 10 issues an alarm to notify the surveillance personnel that there is an intrusion, and the threatening signal output unit 30 threatens the intruder and stops the intruding operation.

For example, of the feature quantities obtained by the feature quantity extraction processing unit 6, when the determination processing unit 9 determines that the area seems to be an intruder but the moving speed is not likely to be an intruder, the alarm output unit 10 operates. Instead, only the threatening signal output unit 30 is operated. When it is determined that the moving speed also seems to be an intruder, both the alarm output unit 10 and the threatening signal output unit 30 are operated.

Example 2. FIG. 2 shows a threatening signal output unit 30.
In the case of a spotlight, for example, the intrusion position calculation unit 31 at this time finds an abnormal place, and the attitude control unit 32 directs the direction of the threatening signal output unit 30 toward the abnormal place. .

Embodiment 3. In FIG. 3, a color camera 33 and an image recording device 34 such as a VTR are provided in addition to the intimidation signal output unit, and a more detailed image of an intruder is displayed by the color camera 3.
3 is an example in which the image is captured by the image recording device 3 and the image is stored by the image recording device 34.

[0017]

As described above, according to the present invention, depending on the level of whether or not the cause of the image change is likely to be an intruder, an alarm is sent to the surveillance staff to notify the intruder or the intruder is intimidated. Since it gives or does not give up, there is an effect that a highly reliable intrusion monitoring device can be obtained. Further, since a true intruder tries to invade confusingly, it is difficult to detect a change, but even if there is a slight change, a threatening signal is issued, so that a high-performance intrusion monitoring device can be obtained.

In addition, in the nighttime monitoring, there are cases where it is desired to monitor without knowing the intruder. In this case, an infrared camera or the like is used, and the operation is performed without forcibly illuminating. Similarly, at this time, if a change in the image is detected and a threatening signal is issued, it is not necessary to wake up a guard against a false alarm, and the effect of giving up threatening intrusion to a true intruder is effective. is there. At this time, the threatening signal uses a light beam rather than a sound such as a siren, which has the effect of not causing annoyance to the surroundings. It's good to use spot-like rays as much as possible. Also,
The intimidating effect is increased by irradiating the position of the intruder with this, and when the intruder moves, the intimidating effect is further increased by moving the spotlight and irradiating the intruder.

Further, by catching an intruder with a black and white camera alone, the color of clothes worn can be known by capturing with a color camera, and by recording this with a VTR, evidence of intrusion can be left.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a conventional intrusion monitoring device.

[Explanation of symbols]

6 Feature extraction processing unit 9 Judgment processing unit 30 Threatening signal output section 31 Intrusion position calculator 32 Attitude control unit 33 TV camera 34 Image recording device

Claims (3)

[Claims] 1. A difference between background image data of an intrusion monitoring area stored in a memory in advance and image data of an intrusion monitoring area, which is sequentially input, is calculated, and an intrusion occurrence is determined based on whether there is a change between both images. In the intrusion monitoring device that makes a judgment and issues an alarm to the surveillance staff when it is judged that there is an intrusion,
Feature amount extraction processing unit that obtains the feature amount (area and movement speed) of image change, threat signal output unit such as a siren that threatens intruders, and only the threat signal output unit is activated or an alarm is output depending on the extracted feature amount. An intrusion monitoring device, comprising: a determination processing unit that determines whether the unit also operates. 2. An intrusion monitoring device using an infrared camera or the like especially at night, when a spotlight is used as an intimidating signal output unit for intimidating an intruder, a threatening signal output unit,
The intruder position calculation unit for obtaining the intruder position on the screen of the intruder, and the posture control unit of the intimidation signal output unit for changing the direction of the intimidation signal output unit to the intrusion position. Intrusion monitoring device. 3. The intrusion monitoring device according to claim 2, further comprising an ordinary TV camera such as a color camera and an image recording device such as a VTR, in addition to the infrared camera.