JPH0950585A - Intruder monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intruder monitoring device capable of setting up an intrusion inhibition area, judging only a person standing in the area as an intruder and outputting respective alarms to the intruder, the other person and disturbance. SOLUTION: The intruder monitoring device is provided with a picture input part 101 for inputting a picture in each previously determined time interval, a monitoring area setting part 102 for setting up an area to be monitored, an object detection part 103 for detecting an object, and an object tracing part 104 for tracing the detected object. The device is also provided with a person judging part 105 for judging whether the object detected by the detection part 103 is a person or not, an intruder inhibition area setting part 106 for setting up an intrusion inhibition area into which intrusion is inhibited, an intruder judging part 107 for judging whether the person judged by the judging part 105 exists in the intrusion inhibition area or not, and an alarm output part 108 for outputting an alarm in accordance with the result of the person judging part 105 or the intruder judging part 107.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intruder monitoring device for monitoring an intruder who intrudes into an area where entry is prohibited, and more particularly to an intruder area where entry is prohibited. It is set and it is determined whether or not the person is an intruder based on the detected position of the person, and an alarm is output.

[0002]

2. Description of the Related Art The prior art is, for example, Proceedings of the 9th Industrial Image Sensing Technology Symposium in Industry 83-8.
As described in “Inspection method for steel tower premises using image processing” on page 8, unnecessary parts other than the monitoring area are removed by a mask image, and the invader is detected by the area of the detected object, circumscribed rectangle, etc. A method of determining is proposed.

[0003]

In the above-mentioned prior art, it is impossible to distinguish between a person in the area where entry is not prohibited and a person (intruder) in the area where entry is prohibited. Therefore, in particular, if there is an area where entry is not prohibited before the entry-prohibited area, a person standing in that area will also be judged as an intruder because part of their body will appear to overlap the entry-prohibition area. There was a problem that it would end up.

An object of the present invention is to set an intrusion prevention area,
It is to judge only a person standing in the area as an intruder.

Another object of the present invention is to output an alarm corresponding to an intruder and a person, and to output an alarm to that effect when there is a disturbance such as a change in vehicle or brightness.

[0006]

In order to achieve the above object, an intruder monitoring apparatus of the present invention is an image input section for inputting an image at a predetermined time interval and a monitoring for setting an area to be monitored. A region setting unit, an object detection unit that detects an object,
In an intruder monitoring device including: an intrusion-prohibited area setting unit that sets an intrusion-prohibited area in which intrusion is prohibited; and person determination that determines whether or not a person is an object detected by the object detection unit Section, an intruder determination section that determines whether or not a person determined to be a person by the person determination section exists in the intrusion prohibited area, and an alarm that outputs an alarm according to the result of the person determination section or the intruder determination section And an output unit.

[0007]

The intrusion prohibited area setting unit sets an area in which the intrusion is prohibited, and the person determination unit determines whether or not the person is a person based on the area, shape, and moving speed of the detected object. Determines whether an intruder is the lowest part of the person (a leg for a standing person) in the intrusion prohibited area, and the alarm output unit uses the person determination unit and the intruder determination unit to Based on the result of the determination that it is an intruder, a person, or a disturbance other than the person, an alarm corresponding to each is output.

As a result, the intruder monitoring device can determine only a person in the intrusion prohibited area as an intruder.
Furthermore, it becomes possible to output an appropriate alarm against an intruder, a person, or a disturbance.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, which is constructed as follows.

The image input unit 101 inputs an image by a video camera at predetermined time intervals and outputs it as an image signal. The monitoring area setting unit 102 sets a monitoring area to be monitored in the image input by the image input unit 101. For example, if the monitoring area is a polygon, the monitoring area can be set by designating its vertices.

The object detection unit 103 uses the image when there is no object such as an intruder or a person as a background image, and the image input unit 10
1 is input in advance, a difference image between the image input by the image input unit 101 and the background image is obtained, and the difference is obtained by a predetermined binarization threshold value or a binarization threshold value obtained by an appropriate means. The image is binarized, and the inside of the monitoring area set by the monitoring area setting unit 102 is divided into connected parts by labeling processing, and each connected part is detected as an object.

The object tracking unit 104 determines the correspondence relationship between the objects detected by the object detection unit 103 and the objects detected by the object detection unit 103 before a predetermined time interval, and the moving speed of each object. And the correspondence relationship between the objects is stored, and the movement history of each object is stored.

The person determining unit 105 determines whether the object detected by the object detecting unit 103 is a person, a vehicle, or a brightness based on the area or shape of each object or the moving amount or the like obtained by the object tracking unit 104. It is determined whether the disturbance is a fluctuation such as

The intrusion-prohibited area setting unit 106 sets an intrusion-prohibited area in which the intrusion is prohibited. For example, if the intrusion-prohibited area is a polygon, the intrusion-prohibited area can be set by designating its apex similarly to the monitoring area setting unit 102.

The intruder determination unit 107 is a person determination unit 105.
With respect to the object determined to be a person, it is determined whether or not the lowest part of the person is included in the intrusion prohibited area, and it is determined whether or not the intruder.

The alarm output unit 108 is an intruder determination unit 107.
When it is determined that the person is an intruder, the person determining unit 105 determines that the person is a person, and the intruder determining unit 107 does not determine the intruder, and when the person determining unit 105 determines that the person is a disturbance, An alarm is output by a predetermined means. The alarm is output by at least one means such as buzzer sounding, lamp blinking, and display display.

FIG. 2 is a diagram showing the system configuration of the intruder monitoring apparatus of FIG.

The intruder monitoring apparatus of this embodiment includes a camera 151 for capturing an image, a monitor 152 for displaying the image and various information, and an image processing section 1 for processing the captured image.
53 and a CPU 154 that controls the execution of the entire apparatus and processes the result of the image processing unit 153.

The image processing unit 153 converts the image input by the camera 151 into digital data by the A / D converter 155 based on the instruction of the CPU 154, and the image memory 1
Store in 56.

Further, by using the data in the image memory 156, the inter-image arithmetic processing, the binarization processing, the labeling processing, the feature extraction processing, etc. are performed by the inter-image arithmetic operation circuit 157, the binarization circuit 158, the labeling circuit 159, the characteristics. This is executed by the extraction circuit 160 or the like, and the processing result or the like is converted into analog data by the D / A converter 161, if necessary, and displayed on the monitor 152.

FIG. 3 is a diagram showing a processing flow of the intruder monitoring apparatus of FIG.

In the image processor 153, the input image 20
The difference image 20 by the difference processing 203 between 1 and the background image 202
4 is obtained, and this is binarized with a predetermined threshold value to obtain a binary image.
205 is created, and the object detection process 206 is executed. Subsequently, the CPU 154 executes the determination process 207 to obtain a necessary result such as the presence or absence of an intruder.

FIG. 4 is a flow chart showing an embodiment of the person judging section 105.

According to the flow chart of FIG. 4, each object is determined to be a person or a disturbance. Step 2
Step 51 is a step of determining whether the area of the object is larger or smaller than a value designated in advance. In step 251, if the value is large, it is determined to be a disturbance because of a change in vehicle or brightness. If small, proceed to step 252.

Step 252 is a step of examining the shape of the object. The shape of the object is obtained as a ratio of the height and the width of the object, and determines whether the object is vertically long or horizontally long.

In step 252, if the screen is horizontally long,
Determined as a disturbance. If it is vertically long, the process proceeds to step 253. Step 253 is a step of examining the moving speed of the object obtained by the object tracking unit 104. In step 253, if the moving speed of the object is higher than a predetermined value, it is determined to be a disturbance, and if it is low, it is determined to be a person.

FIG. 5 is a flow chart showing an embodiment of the intruder judging section 107.

According to the flowchart of FIG. 5, each person is determined to be an intruder or a person. Step 301 is a step of obtaining a circumscribed rectangle of a person.

Step 302 is a step of obtaining the bottom of a person. In the present embodiment, the midpoint of the bottom of the circumscribed rectangle is set, but it may be set to either the left or right point. Step 303 is a step of determining whether the lowest part of the person is included in the intrusion prohibited area. If the determination result of step 303 is yes, it is determined to be an intruder, and if no, it is determined to be a person.

FIG. 6 shows an intruder determination unit 10 according to this embodiment.
It is a figure which shows an example of the determination result of 7.

In FIG. 6, circumscribed rectangles 401, 402, 403 are obtained for the persons 1, 2, 3 inside the monitoring area 12 in step 301. Step 302
In, the midpoints of the bottom sides of the circumscribed rectangles 401, 402, 403 are obtained and set as the lowest parts 411, 412, 413 of the person. In step 303, since only the lowermost part 412 of the person is included in the intrusion prohibited area 15, only the person 2 is determined to be the intruder.

According to the present embodiment, only the person whose bottom part is included in the intrusion prohibited area can be determined as the intruder.
This has the effect of distinguishing an intruder standing in the intrusion prohibited area from a person in another area. In addition, intruders, people,
There is an effect that a different alarm can be output for each disturbance.

FIG. 7 is an example of setting an intrusion prohibited area in the intrusion prohibited area setting unit 106 according to another embodiment.
By inputting polygonal lines corresponding to the front side boundary line 13 and the front side boundary line 14 inside the monitor area 12 set by the monitor area setting unit 102 in the image input range 11, the front side boundary line 13 and the front side boundary line 13 are input. Only the area surrounded by 14 is set as the intrusion prohibition area 15.

According to this embodiment, there is an effect that the intrusion prohibition area 15 can be set only by inputting a polygonal line, and the monitoring area 12 is located on the side opposite to the intrusion prohibition area 15 and the area 16 on the front side thereof. Can be divided into three areas, namely, the area 17 of FIG.
There is an effect that it can be found separately in the area 17 on the opposite side.

FIG. 8 shows the monitoring area 12 as shown in FIG.
It is the flowchart which showed the other Example of the intruder determination part 107 which can be applied when it divides into three area | regions of the intrusion prohibition area | region 15 and the area | region 16 of this side, and the area | region 17 of the other side, and is determined about each person. It Step 601
Is a step of determining whether or not there is a common part with the intrusion prohibition area 15. If the determination in step 601 is absent, it is determined to be a person, and if yes, the process proceeds to step 602. Step 60
Step 2 is a step of determining whether or not there is a common portion with the front side region 16. If the determination result of step 602 is present, it is determined to be a person.

FIG. 9 shows an intruder determination unit 10 according to this embodiment.
It is a figure which shows an example of the determination result of 7.

In FIG. 9, with respect to the persons 4, 5 and 6 inside the monitoring area 12, the person 4 having no common part with the intrusion prohibition area 15 is determined as a person in step 601.

In step 602, only the person 5 who does not have a common part with the front side area 16 of the persons 5 and 6 is determined to be an intruder.

According to this embodiment, it is possible to more accurately determine whether or not the lowermost part of the person is included in the intrusion prohibited area, as compared with the determination method using the circumscribing rectangle, and to distinguish the intruder from the person. The effect is that it can be done strictly.

As another embodiment, in the intruder determination unit 107, even if the person who has been determined to be an intruder before the predetermined time interval is tracked by the object tracking unit 104, even if it is outside the intrusion prohibited area. Continue to determine that the intruder.

According to this embodiment, a person who has once entered the intrusion-prohibited area and is determined to be an intruder is continuously determined to be an intruder,
It has the effect of being able to continue tracking as an intruder.

Another embodiment of the alarm output unit outputs at least one of an alarm indicating the presence of an intruder, an alarm indicating the presence of a person, and an alarm indicating the presence of disturbance, and then outputs the alarm for a predetermined time. It is to continue to output the alarm.

According to the present embodiment, since the alarm is continuously output for the designated time, there is an advantage that the alarm is less missed. Further, when an intruder or a person is detected, the image at that time is recorded in the image memory 156, so that the surveillance staff can verify this image later.

[0045]

According to the present invention, only a person whose bottom part is included in the intrusion prohibited area can be determined as an intruder.
This has the effect of distinguishing an intruder standing in the intrusion prohibited area from a person in another area.

For each of the intruder, the person, and the disturbance,
There is an effect that different alarms can be output.

Further, the intrusion prohibited area can be set only by inputting a polygonal line, and the monitoring area can be divided into three areas, an intrusion prohibited area and an area on the front side and an area on the side opposite to the intrusion prohibited area. There is an effect that it is possible to determine in which area, the area on the front side or the area on the other side, the person has been detected. Further, by dividing into three areas, it is possible to more accurately determine whether the lowermost part of the person is included in the intrusion prohibited area, and there is also an effect that the intruder and the person can be more strictly distinguished.

[Brief description of drawings]

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

FIG. 2 is a system diagram showing a system configuration of an intruder monitoring device according to an embodiment of the present invention.

FIG. 3 is a diagram showing a flow of processing of the intruder monitoring device of FIG.

FIG. 4 is a flowchart showing a processing method of an embodiment of a person determination unit of the present invention.

FIG. 5 is a flowchart showing a processing method of an embodiment of an intruder determination unit of the present invention.

FIG. 6 is a diagram showing an example of a processing result of an intruder determination unit of the present invention.

FIG. 7 is a diagram showing an example of a setting method in an intrusion prohibited area setting unit of the present invention.

FIG. 8 is a flowchart showing a processing method of another embodiment of the intruder determination unit of the present invention.

FIG. 9 is a diagram showing an example of a processing result of an intruder determination unit according to another embodiment of the present invention.

[Explanation of symbols]

101 ... Image input unit, 102 ... Monitoring area setting unit, 103
... object detection unit, 104 ... object tracking unit, 105 ... person determination unit, 106 ... intrusion prohibited area setting unit, 107 ... intruder determination unit, 108 ... alarm output unit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiki Kobayashi 7-1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi Research Laboratory

Claims (8)

[Claims] 1. An intruder monitor comprising an image input section for inputting an image at predetermined time intervals, a monitor area setting section for setting a monitor area to be monitored, and an object detecting section for detecting an object. In the device, an intrusion-prohibited area setting unit that sets an intrusion-prohibited area in which the intrusion is prohibited in the monitoring area, and a person determination unit that determines whether or not the object detected by the object detection unit is a person. And an intruder determination unit that determines whether or not a person is present in the intrusion prohibited area, and an alarm output unit that outputs an alarm according to the result of the person determination unit or the intruder determination unit. Intruder monitoring device. 2. The intrusion-prohibited area is set by inputting at least one of a front side and a side opposite to the intrusion-prohibited area in the monitoring area as a boundary line in the intrusion-prohibited area setting unit. The intruder monitoring device according to item 1. 3. The intruder monitoring device according to claim 1, wherein the person determination section determines whether or not the object is a person based on the feature amount of the object detected by the object detection section. 4. The intruder monitoring device according to claim 1, wherein the intruder determination unit determines the intruder only when the lowest part of the person is in the intrusion prohibited area. 5. The intruder monitoring device, wherein an object tracking unit for tracking an object is provided, and the intruder determination unit determines that a person outside the intrusion-prohibited area has a determination result up to the previous time. The intruder monitoring device according to claim 1, wherein the intruder monitoring device determines that the intruder is an intruder. 6. In the alarm output section, when the intruder determination section determines that the person is an intruder, the alarm person determination section that indicates the presence of the intruder determines that the person is a person, and the intruder determination section determines that the intruder is the intruder. If not, if it is determined that the person is not a warning by the warning person determination unit indicating the presence of a person,
The intruder monitoring device according to claim 1, wherein at least one alarm indicating the presence of a disturbance other than a person is output. 7. The alarm output unit outputs at least one of an alarm indicating the presence of an intruder, an alarm indicating the presence of a person, and an alarm indicating the presence of disturbance, and then outputs the alarm for a predetermined time. The intruder monitoring device according to claim 6, wherein the output is continued. 8. The intruder monitoring device further comprises an image recording unit for recording a video at that time when the presence of an intruder or the presence of a person is determined. Intruder monitoring device described.