JP2000057449A - Abnormality notification system provided with monitor camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect whether the visual field of a monitor camera is interrupted or not. SOLUTION: An object detection part 2 detects an object based on image data outputted from a monitor camera 1. When a reset state is set up by a state setting part 4 and a detection signal is not received at all from the object detection part 2 for checking time set in a timer 6, a control part 3 judges that the visual field of the camera 1 is interrupted and a notifiation part 5 notifies abnormality to a center device in a monitor center installed in a security company.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality notification system provided with a monitoring camera, and more particularly to a technique for preventing an image at the time of occurrence of an abnormality from being caught by mischief or the like.

[0002]

2. Description of the Related Art Conventionally, an abnormality notification system using an image sensor has been known. FIG. 3 shows a schematic configuration example.
3, reference numeral 1 denotes a monitoring camera, 2 denotes an object detection unit, 3 denotes a control unit, 4 denotes a state setting unit, and 5 denotes a notification unit.

The image data from the surveillance camera 1 is transmitted to a control unit 3
And input to the object detection unit 2. The object detection unit 2 determines the presence or absence of a moving object based on image data from the monitoring camera 1, and when it is determined that there is a moving object, sends a detection signal indicating that the moving object has been detected to the control unit 3. The surveillance camera 1 and the object detection unit 2 constitute an image sensor. Various methods are known as a method of detecting an object by the object detection unit 2, such as a method of detecting an object based on an inter-frame difference, and any method may be used.

[0004] The object detection unit 2 may be integrated with the monitoring camera 1 or may be integrated with the control unit 3. This is the same in the following.

[0005] The state setting section 4 sets a security state of a warning state / release state for the control section 3. There are various known methods for setting the security state such as the alert state / release state in the state setting unit 4, but any method may be used.

When the release state is set in the state setting section 4, the control section 3 ignores the detection signal output from the object detection section 2 and does not perform any processing. Because it is natural that there is a movement of a person during the period of the release state, even if the detection signal is output from the object detection unit 2, it is assumed that the detection of the movement of the normal person is performed. Is appropriate.

[0007] However, when the alarm state is set in the state setting unit 4, when the detection signal is output from the object detection unit 2, the control unit 3 determines that an abnormality has occurred, and determines that an abnormality has occurred. The image data obtained from the image processing apparatus 1 is subjected to predetermined processing such as data compression, and the notifying unit 5 sends the image data subjected to the predetermined processing and the data indicating the occurrence of an abnormality to a security center or the like of a security company. Send to the installed center device. This is an abnormal notification.

[0008]

However, in the abnormality notification system using the image sensor as described above, the surveillance camera 1 is blindfolded by a shield, or strong light is applied to the surveillance camera 1, Alternatively, there is a case where a mischief such as spraying is sprayed on a lens of the surveillance camera 1 and the field of view of the surveillance camera 1 is blocked. And as a result of such mischief,
If the visual field of the surveillance camera 1 is obstructed, the moving object cannot be detected by the object detection unit 2, and an abnormality is detected even when the alert state is set by the state setting unit 4. There is a problem that can not be done. Such a problem is not limited to the abnormality notification system using the image sensor as described above, and is generally a problem in a security system using a monitoring camera.

Accordingly, an object of the present invention is to provide an abnormality notification system including a monitoring camera which detects whether or not the visual field of a monitoring camera is obstructed and issues an abnormality report when the visual field is obstructed. Is what you do.

[0010]

According to a first aspect of the present invention, there is provided an abnormality notification system including a surveillance camera for detecting the presence or absence of an object based on image data from the surveillance camera. Object detection unit, a state setting unit for setting a security state, and when the release state is set by the state setting unit, it is detected that an object is detected from the object detection unit for a predetermined period of time. And a control unit for issuing an abnormality report when the detected detection signal is not received.

According to a second aspect of the present invention, there is provided an abnormality notification system including a surveillance camera, a surveillance camera, an object detection unit for detecting the presence or absence of an object based on image data from the surveillance camera, and a state setting unit for setting a security state. And, in an abnormality notification system including a monitoring camera including a control unit that notifies the object detection unit of the security state set by the state setting unit,
If the object detection unit does not detect an object for a predetermined period of time when the release state is set, the object detection unit notifies the control unit that the object detection has not been performed, and the control unit transmits When receiving a signal indicating that no object has been detected for the predetermined time, an abnormality notification is performed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment in which an abnormality notification system provided with a monitoring camera according to the present invention is applied to an abnormality notification system using an image sensor. In the figure, reference numeral 6 denotes a timer. Note that the same components as those shown in FIG. 3 are denoted by the same reference numerals, and redundant description will be minimized.

The operation will be described below. The operation when the alert state is set by the state setting device 4 is as follows.
This is the same as described with reference to FIG.

Next, the operation when the release state is set by the state setting device 4 is as follows.
In the release state, since a person moves within the field of view of the surveillance camera 1, it is natural that a detection signal is output from the object detection unit 2, and the object detection unit 2 is output for a long time.
If no detection signal is output from the monitoring camera 1, it can be determined that the visual field of the monitoring camera 1 is blocked.

Therefore, when the control unit 3 is in the release state, if it does not receive any detection signal from the object detection unit 2 during the check time set by the timer 6, the control unit 3 causes the control unit 3 to operate for some reason. It is determined that the visual field of the monitoring camera 1 is blocked.

More specifically, when the check time of the timer 6 elapses without receiving a detection signal from the object detection unit 2 after the release state is set by the state setting unit 4,
The control unit 3 determines that the visual field of the monitoring camera 1 is obstructed, and informs the center device of the information indicating the obstruction to the center device by using the notification unit 5.

In the release state, the control unit 3 receives the detection signal from the object detection unit 2 at a certain time, but when the check time of the timer 6 has elapsed without receiving the detection signal thereafter, the control unit 3 It is determined that the field of view of the user is obstructed, and information indicating the fact is notified to the center device by the notification unit 5.

The check time set in the timer 6 may be arbitrarily set depending on where the surveillance camera 1 is installed. For example, surveillance camera 1
If the field of view is directed to a place where it is considered that human movement is relatively large in the released state, the check time may be set short within a range of about ten minutes to one hour. If the field of view is directed to a place where the movement of the person is considered to be relatively small in the released state, the check time may be set to be as long as several hours.

The control unit 3 does not judge that an abnormality has occurred even if it receives a detection signal from the object detection unit 2 in the release state, and does not report an abnormality.

As described above, according to this system, it is possible to diagnose whether or not the visual field of the monitoring camera 1 is blocked.

The first embodiment according to the present invention has been described above. Next, with reference to FIG. 2, a second embodiment of the abnormality notification system including the monitoring camera according to the present invention will be described. Note that, in FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals.

In the first embodiment, the surveillance camera 1
The control unit 3 determines whether or not the field of view of the surveillance camera 1 is blocked in the second embodiment. I do. Therefore, the object detection unit 2 and the control unit 3 can communicate with each other.

In this embodiment, the timer 6 in which the check time is set is provided in the object detection unit 2. The check time set in the timer 6 may be arbitrarily set according to the location of the monitoring camera 1 as in the first embodiment described above.

The operation will be described below. Control unit 3
Receives a signal indicating that the alert state has been set from the state setting unit 4 while in the release state, enters the alert state, and notifies the object detection unit 2 of the alert state signal.
As a result, the object detection unit 2 recognizes that the alert state has been entered.

When the moving object is detected in the alert state, the object detecting section 2 outputs a detection signal to the control section 3. When receiving the detection signal from the object detection unit 2, the control unit 3 determines that an abnormality has occurred, captures an image from the monitoring camera 1, performs predetermined processing such as data compression on the image, and The image data subjected to the predetermined processing and the data indicating the occurrence of an abnormality are transmitted to a center device installed in a security center or the like of a security company to perform an abnormality notification.

When the control unit 3 receives a signal indicating that the release state has been set from the state setting unit 4 while in the alert state, the control unit 3 enters the release state and notifies the object detection unit 2 of the release state signal. . As a result, the object detection unit 2 recognizes that it has entered the release state.

When the moving object is detected based on the image data from the surveillance camera 1 in the release state, the object detecting unit 2 does not output a detection signal. If no moving object is detected during the time, it is determined that the visual field of the surveillance camera 1 is obstructed by some cause, and the surveillance camera 1
Output to the control unit 3 a signal indicating that is abnormal.

Specifically, after receiving the release state signal from the control unit 3, the check time set in the timer 6 elapses without detecting the moving object based on the image data of the monitoring camera 1. Sometimes, the object detection unit 2 determines that the field of view of the surveillance camera
Output to the control unit 3 a signal indicating that is abnormal. When the control unit 3 receives the signal, the notification unit 5 notifies the center device of information indicating that the visual field of the monitoring camera 1 is blocked.

The object detection unit 2 detects a moving object at a certain time when the object is in the release state, but when the check time set in the timer 6 elapses without detecting the moving object thereafter, the object detection unit 2 detects the moving object. The detection unit 2 is a monitoring camera 1
Is determined to be obstructed, and a signal indicating that the monitoring camera 1 is in an abnormal state is output to the control unit 3. When the control unit 3 receives the signal, the notification unit 5 notifies the center device of information indicating that the visual field of the monitoring camera 1 is blocked.

As described above, according to this system, it is possible to diagnose whether or not the visual field of the monitoring camera 1 is blocked.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
Various modifications are possible. For example, in the above-described embodiment, the object detection unit 2 is shown as being independent, but this object detection unit 2 may be integrated with the monitoring camera 1 or may be integrated with the control unit 3. Is also good. In the above-described embodiment, the abnormality notification system using the image sensor has been described. However, the present invention is not limited to the abnormality notification system using the image sensor, and is generally applied to a security system using a monitoring camera. You can do it.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of an abnormality notification system including a monitoring camera according to the present invention.

FIG. 2 is a diagram showing a second embodiment of the abnormality notification system including the monitoring camera according to the present invention.

FIG. 3 is a diagram showing an example of a conventional configuration of an abnormality notification system using an image sensor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Monitoring camera, 2 ... Object detection part, 3 ... Control part, 4 ... State setting part, 5 ... Notification part, 6 ... Timer.

Claims (2)

[Claims] A surveillance camera, an object detection unit for detecting the presence or absence of an object based on image data from the surveillance camera, a state setting unit for setting a security state, and a release state set by the state setting unit A surveillance camera, comprising: a control unit for notifying an abnormality when a detection signal indicating that an object is detected from the object detection unit is not received from the object detection unit for a predetermined period of time. Error reporting system. 2. A surveillance camera, an object detection unit for detecting the presence or absence of an object based on image data from the surveillance camera, a state setting unit for setting a security state, and a security state set by the state setting unit. An abnormality notification system including a surveillance camera having a control unit that notifies the object detection unit, wherein the object detection unit does not detect an object for a predetermined time when the release state is set. In addition, when the control unit receives a signal indicating that no object has been detected for the predetermined time from the object detection unit, the control unit notifies the control unit of the abnormality. Abnormality notification system with camera.