JPH11213271A - Picture monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm the presence of an abnormal state by indicating an abnormality direction area in a picture in a picture monitoring system at the time of the occurrence of an abnormality. SOLUTION: A picture circuit system is constituted of a picture sensor 2 for judging the presence or absence of the occurrence of an abnormality from a picture obtained by photographing a monitor area, and for outputting, at the time of detecting the abnormality, picture data indicating a picture at the time of the occurrence of the abnormality as well as area data indicating the abnormality detection area in the picture, and of a security center device 7 for preparing a picture and a picture indicating the abnormality detection area in the picture at the time of the occurrence of the abnormality from the inputted picture data and area data, and for allowing a display part to display it. The controller of a security center can view the abnormality detection area displayed in the picture at the time of the occurrence of the abnormality, and confirm the abnormal state. Thus, a load on the control staff can be reduced. Also, only the picture at the time of occurrence of the abnormality can be displayed by canceling the display of the abnormality detection area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image monitoring system for detecting the occurrence of an abnormality such as intrusion in a monitoring area by an image sensor, and confirming an abnormal state at a remote security center by viewing an image when the abnormality has occurred. About.

[0002]

2. Description of the Related Art In a conventional image monitoring system, a monitoring area is continuously photographed by an image sensor, and it is determined whether an abnormality has occurred based on the photographed image. When an abnormality is detected, the image at the time of occurrence of the abnormality and the latest image are transmitted to the security center. At the security center, the traffic controller checks the transmitted image at the time of occurrence of the abnormality and the latest image to confirm whether or not the abnormality has occurred and the type of the abnormality.

[0003]

However, even when, for example, the curtain shown in the image slightly shakes, the image sensor may detect a moving object and give a false report that an abnormality has occurred. In the case of such a false report, the intruder or its traces are not shown in the image, so just looking at the image, the security center controller could tell the cause of the false report or the abnormal situation. It is not possible to immediately confirm that an outbreak has occurred.

SUMMARY OF THE INVENTION It is an object of the present invention to make it easy to confirm an abnormal state by indicating an area where an abnormality is detected in an image when an abnormality occurs in an image monitoring system. Further, the present invention provides an image monitoring system,
An object of the present invention is to make it easier to see an image by selectively displaying an abnormality detection area in an image when an abnormality occurs.

Another object of the present invention is to provide an image sensor which can be suitably used for the above-mentioned image monitoring system. Still another object of the present invention is to provide a security center device that can be suitably used for the image monitoring system.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. The image monitoring system according to the present invention captures a monitoring area, determines whether or not an abnormality has occurred from the obtained image, and when an abnormality is detected, image data representing an image at the time of occurrence of the abnormality and abnormality detection in the image An image sensor that outputs region data indicating a region, and an image when an abnormality occurs and an image that indicates an abnormality detection region in the image when the abnormality occurs are created from the input image data and the region data,
And a security center device that can be displayed on the display unit.

[0007] According to the image monitoring system, when an abnormality is detected by the image sensor, the security center displays an image at the time of occurrence of the abnormality sent from the image sensor on the display unit of the security center device, so that the traffic control center can display the image. Check the abnormal status. At this time, the security center device displays the created abnormality detection area on the image at the time of occurrence of the abnormality. As described above, the abnormality detection area is displayed on the image at the time of the occurrence of the abnormality, so that the controller can check whether or not the abnormality has occurred, the details of the abnormality, and the like by looking only at the area. Therefore, the burden on the controller is reduced, and the cause of the abnormality detection can be easily specified.

Further, according to the present invention, the image data at the time of occurrence of the abnormality and the data indicating the abnormality detection area are separately sent to the security center device. Therefore, when the display of the abnormality detection area hinders the confirmation of the image, the controller can stop displaying the abnormality detection area and display only the image at the time of occurrence of the abnormality on the display unit. That is, a part of the image at the time of occurrence of the abnormality does not disappear, and the controller can more reliably confirm the abnormal state.

The present invention provides, as an image sensor used in the above-mentioned image monitoring system, an image pickup means, a means for judging the presence or absence of an abnormality from an image taken by the image pickup means, And a means for outputting area data indicating an abnormality detection area in an image when an abnormality has occurred.

This image sensor separately outputs an image at the time of occurrence of an abnormality and area data of the abnormality detection area. Therefore, the security center device selectively selects an image at the time of occurrence of an abnormality and an image indicating the abnormality detection area. Can be obtained. The present invention provides, as a security center device used in the image monitoring system, an image at the time of occurrence of an abnormality and an abnormality detection area within the image based on the input image data at the time of the occurrence of the abnormality and the area data indicating the abnormality detection area. A security center comprising: a means for creating an image indicating an error; a display means; and a control means for selecting an image when an abnormality has occurred and an image indicating an abnormality detection area in the image and displaying the image on the display means. Provide equipment.

This security center device can display an abnormality detection area on an image when an abnormality occurs, so that it is possible to easily confirm an abnormal state. Further, when the abnormality detection area hinders the confirmation, only the image at the time of occurrence of the abnormality can be displayed, so that the confirmation can be reliably performed without losing a part of the image.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an overall configuration of a monitoring system to which the image monitoring system of the present invention is applied. A controller 1 is installed in a building to be monitored, and an image sensor 2, a fire sensor 3, an emergency button 4, and a mode setting device 5 are connected to the controller 1. The controller 1 is connected via a telephone line 6 as a communication line to a security center device 7 provided at a remote security center.

The connection between the image sensor 2 and the controller 1 is made by an analog signal line 8 and a digital signal line 9. The analog signal line 8 is formed of a coaxial cable, transmits a video signal (NTSC system), and receives a digital signal line 9.
Is composed of a twisted pair line and transmits a control signal based on a digital signal. Here, the operation of the entire monitoring system of FIG. 1 will be briefly described.

The mode setting unit 5 sets the monitoring system to the alert release mode or the alert set mode. When the sensor detects an abnormality in the alert set mode, the controller 1
Transmits an abnormal signal indicating that an abnormality has occurred in the security center device 7 via the telephone line 6. Fire sensor 3,
When the emergency signal is output from the emergency button 4, the controller 1 transmits data indicating the type of the abnormality and the location where the abnormality has occurred to the security center device 7 through the telephone line 6. The method for detecting and transmitting these abnormal signals is well known in the art, and thus further description is omitted.

A plurality of image sensors 2 are installed in a building,
A monitoring area including a monitoring target such as a window or a door is photographed, and the presence or absence of an abnormality such as intrusion is determined from the obtained image. Various methods have been proposed as a method for determining the presence or absence of the abnormality, and an arbitrary method can be adopted. An example of a method for detecting an abnormality from an image will be described with reference to FIG.

FIG. 2A is a reference image, FIG. 2B is a current image,
(C) is a difference between the reference image and the current image, (D) is a diagram showing an abnormality detection area, and (E) is an image in which an abnormality detection area is displayed on the image when an abnormality has occurred. The current image in (B) is the latest image obtained by the image sensor 2 and is compared with the reference image in (A) to extract the difference (C) between the two images. If the difference between the two images exceeds a predetermined reference value, it is determined that an abnormality has occurred in the monitoring area. The reference image of (A) includes (a) an image obtained when the image sensor 2 is installed,
(B) Image obtained when shifting to the alert set mode,
(C) Images taken out at predetermined time intervals (eg, every 10 frames), (d) one or more previous images of the current image, and the like are used.

Further, as shown in (D), the image sensor 2 creates a circumscribed rectangle surrounding this area with the area where the difference occurs as an abnormality detection area, and coordinates a and b of two points representing the rectangle. Is the abnormality detection area coordinates. (E) shows an image in which an abnormality detection area is displayed on the current image (image at the time of occurrence of abnormality) in (B). This image is displayed on the security center device 7. According to the image of (E), the abnormality detection area is displayed surrounded by a frame.
It is only necessary to look at this range, and the checking operation can be performed easily and quickly.

The operation of the entire image monitoring system when the image sensor 2 detects an abnormality will be described with reference to the time chart of FIG. When the mode shifts according to the setting of the mode setting device 5, the controller 1 transmits a mode shift signal to all the image sensors 2. Further, the controller 1 sequentially sends a status calling signal to each of the monitoring sensors 2A, 2B... (Polling).

Each of the monitoring sensors 2A, 2B... Sends a status signal, that is, a normal signal or an abnormal signal, to the controller 1 in response to the status call signal. When a certain image sensor 2A transmits an abnormal signal in response to the state calling signal after shifting to the alert set mode, the controller 1 dials and connects to the security center device 7 via the telephone line 6. Also, the image sensor 2A that has sent the abnormal signal
Then, an abnormal image transmission request signal is transmitted.

The image sensor 2A transmits an abnormal image to the controller 1 in response to an abnormal image transmission request signal. At this time, the image data at the time of occurrence of the abnormality is converted into an analog video signal, and the analog signal line 8 controls the controller 1.
Sent to. The abnormality detection area coordinates are transmitted as area data by the digital signal line 9. Although it takes a relatively long time to transmit and receive a video signal, in this example, the video signal is transmitted and received through a dedicated analog signal line 8. For this reason, even during that time, communication between the controller 1 and each sensor 2 is possible by the digital signal line 9.

When receiving a response from the security center device 7, the controller 1 sends the abnormal signal sent from the image sensor 2A, the image at the time of occurrence of the abnormality, and the coordinates of the abnormality detection area to the security center device 7 via the telephone line 6. Send. When this transmission ends, an abnormal image erasure signal is output to the image sensor 2A, and the image sensor 2A erases the stored abnormal image and continues the monitoring operation.

The security center device 7 displays an abnormal image on the display unit in response to the reception of the abnormal signal, and the controller checks the abnormal state by looking at the image. When an abnormal state is confirmed, a reception end signal to the controller 1 is output. When receiving the reception end signal, the controller 1 releases the telephone line 6 connected to the security center device 7, and outputs a status call signal to the next image sensor 2B. Thereafter, the same operation as described above is repeated.

Here, a method of checking the state of the security center device 7 will be described. The security center device 7 creates an image at the time of occurrence of an abnormality from the video signal sent from the controller 1. This image corresponds to FIG.
The result is as shown in FIG. At the same time, a circumscribed rectangular frame indicating the abnormality detection area is created based on the abnormality detection coordinates. This image is the frame shown in FIG. Then, a frame is superimposed on the image at the time of occurrence of the abnormality and displayed on the display unit. This image is as shown in FIG.

Therefore, when the controller looks at the image at the time of the occurrence of the abnormality and checks whether or not the abnormality has actually occurred, or when the abnormality has occurred, the controller pays attention to only the region surrounded by the frame. Therefore, the checking operation can be performed quickly with a small burden. If the frame overlaps the part that the controller wants to see, the security center device 7 displays an abnormal image (FIG. 2).
Since (B)) has been sent, the display of the frame can be stopped and only the abnormal image can be displayed. That is, it is possible to prevent the occurrence of a lost portion in the image, and to surely confirm the image.

The image sent from the image sensor 2 to the security center device 7 may include images of several frames before and after the abnormality in addition to the image at the time of occurrence of an abnormality. In this case, by comparing the image at the time of occurrence of the abnormality with the images before and after the abnormality, the controller can improve the accuracy of checking the abnormal state. Next, specific configurations of the controller 1, the image sensor 2, and the security center device 7 used in the image monitoring system will be described.

FIG. 4 shows the structure of the image sensor 2 and FIG.
Indicates the contents of the storage means in the image sensor 2. The image sensor 2 includes a control unit 201 including a CPU and a power supply 202. Each part in the sensor is controlled by the control unit 201 and receives power from a power supply 202. The power supply 202 includes a conversion device that converts an AC voltage supplied from the outside into a DC voltage. Note that instead of providing the power supply 202 in the image sensor 2, power may be supplied from the controller 1.

The control means 201 has a storage means 220
Is connected. The contents of the storage means 220 will be described with reference to FIG. The storage means 220 has a program area 221 storing a program for causing the image sensor 2 to execute a predetermined operation, a parameter area 222 storing parameters, a work area 223, and a monitoring area. A status storage area 224 for storing the distinction between normal and normal and a mode storage area 225 for storing whether the monitoring area is in the alert set mode or the alert release mode are provided.

The storage means 220 further includes an image pickup means 203
The reference image storage area 226, the current image storage area 227, the abnormal image storage area 2
28, an abnormality detection area data storage area 229. The current image storage area 227 stores the latest image captured by the imaging unit 203 and images up to two frames before the latest image.
The reference image storage area 226 stores the image described with reference to FIG.

When an abnormality is detected in the current image, the current image at that time is stored in the abnormal image storage area 228 as the image at the time of occurrence of the abnormality, and the image of the previous two frames and the image of the subsequent seven frames are further stored. Images of a total of 10 frames are stored.
The abnormality detection area data storage area 229 stores the abnormality detection area coordinates. Returning to FIG. 4, the imaging unit 203 that captures an image of the monitoring area is configured by a CCD camera, and has sensitivity from the visible region to the infrared region. An infrared light projecting unit 204 is provided, and emits infrared light to the monitoring area when it becomes dark such as at night.

The image processing means 205 compares the current image stored in the storage means 220 with the reference image to determine whether an abnormality has occurred. One example of this determination logic has already been described with reference to FIG. Display means 20
Reference numeral 6 denotes an LED, which is turned on when an abnormality is detected, turned off when no abnormality is detected, and displays the presence or absence of the abnormality detection outside the image sensor 2.

The communication means 207 is an interface for transmitting and receiving signals to and from the controller 1, and is connected to the controller 1 via the digital line 9. Image output means 208
Is an interface for outputting an image when an abnormality has occurred, and is connected to the analog signal line 8 via the switching means 209. The analog signal line 8 connects the controller 1 and each image sensor 2 in series as shown in FIG. The switching unit 209 of the image sensor 2 connects the input side and the output side of the analog signal line 8 in a normal state, disconnects the input side analog signal line in an abnormal state, and connects the image output unit to the output side analog signal line 8. To be connected. In FIG. 4, the input side is “from another image sensor” and the output side is “to the controller”.
Is displayed.

The address setting section 210 is constituted by a dip switch, and an address for the controller 1 to specify the image sensor 2 is set. Operation means 211
Is a means for turning on and off the power. Further, when the operation unit 211 is turned off, the switching unit 209 connects the input side and the output side of the analog signal line 8 to bypass the image sensor 2 from the analog signal line 8.

FIG. 6 shows the configuration of the controller 1. The controller 1 includes a control unit 101 including an MPU and the like, and a power supply circuit 102. Controller 1
Each part in the inside is controlled by the control unit 101 and receives supply of power from the power supply circuit 102. The power supply circuit 102 includes a conversion circuit for converting an external AC voltage to a DC voltage and a battery. Also, a mode setting device 5 is connected.

The controller 1 is further provided with the following parts. The sensor monitoring circuit 103 includes the fire sensor 3,
This is the interface with the emergency button 4. Modem 10
4 is provided between the telephone line 6. The image sensor communication control unit 105 is connected to the image sensor 2 via the digital signal line 9. The video input / output control unit 106 is connected to the image sensor 2 via the analog signal line 8. The video input / output control unit 106 converts the video signal sent from the image sensor 2 into
It is distributed to the modem 104 and the monitor device 10 connected to the outside.

The display unit 107 normally displays the monitoring state of the monitoring area on the screen, and when an abnormality is detected, sounds a buzzer and displays the type of abnormality, the location where the abnormality has occurred, and the like on the screen. . The display unit 107 is also used when setting the image sensor 2. The setting unit 108 is used at the time of initial setting or setting change of the image sensor 2. The general operation of the controller 1 will be described.

At the time of initial setting or setting change of the image sensor 2, the operator operates the monitor device 10 by using the image input / output control unit 1.
06, setting of the image sensor 2 (eg, height, angle, Sensitivity etc.). As described above, the controller 1 enables the setting of each image sensor 2 so that all the image sensors 2
Can be set. After the setting is completed, the monitor device 10 is removed from the controller 1.

The mode setting unit 5 sets the alert set mode or the alert release mode, and when the mode shift occurs, the image sensor communication control unit 105 and the digital signal line 9
A mode transition signal is transmitted to all the image sensors 2 via the. Fire sensor 3, emergency button 4 to sensor monitoring circuit 1
When an abnormal signal is input via the controller 03, the controller 1
Transmits data such as the type of abnormality, the location where the abnormality has occurred, and the time of occurrence to the security center device 7 via the modem 104 and the telephone line 6.

The controller 1 communicates with the image sensor communication control unit 105 via the digital signal line 9 a status calling signal,
A mode transition signal, an abnormal image transmission request signal, an abnormal image erasing signal, and the like are transmitted to the image sensor 2, and
Receives normal signal, abnormal signal, abnormal detection area coordinates, etc. The analog signal line 8 and the video input / output control unit 106
, A video signal from the image sensor 2 is received.

When the image sensor 2 detects an abnormality, the controller 1 transmits the abnormality signal, the video signal, and the area data received from the image sensor 2 to the security center device 7. In addition, regarding transmission and reception of signals between the controller 1 and the image sensor 2 and between the controller 1 and the security center device 7,
Since this has been described with reference to FIG. 3, refer to this description.

In this embodiment, an analog telephone line is used as a communication line, but a digital telephone line such as ISDN can be used. In this case, means for converting a video signal from an analog signal to a digital signal is required. FIG. 7 shows a configuration of a part relating to the image monitoring system in the security center device 7.

The security center unit 7 is provided with a control unit 701 composed of an MPU or the like, and each unit in the security center unit 7 is controlled by the control unit 701.
A communication interface 702 for communicating with the controller 1 through the telephone line 6 is provided. The video signal and its related signal sent from the controller 1 are stored in the image information storage unit 703. Note that the video signal is stored after being converted into digital data. The video signal includes an image at the time of occurrence of an abnormality, two frames before the image, and 7
Contains the image of the frame. The image information storage unit 70
The data stored in 3 includes the address of the image sensor 2 that detected the abnormality, the time of occurrence of the abnormality, the frame number of the image, the area coordinates of the abnormality detection area, and the image data.

When the control unit 701 receives the abnormal signal,
The display unit 704 displays the occurrence of the abnormality, the name of the property in which the abnormality has occurred, the location of the abnormality, and the like, and displays an image when the abnormality has occurred on the monitor 704. The monitor 704 is connected to the control unit 701 via the image output unit 706. When displaying an image, the control unit 701 creates a frame indicating an abnormality detection area from the area coordinates stored in the image information storage unit 703,
An image obtained by superimposing this frame on the image at the time of occurrence of the abnormality (see FIG.
(E)) is displayed on the monitor 704. The controller checks the image on the monitor 704 to confirm the abnormal state. In addition, when the abnormality detection area is in the way, the controller can operate the operation unit 705 to display an image not showing the abnormality detection area (FIG. 2B described above). If the state cannot be sufficiently confirmed only by the image at the time of the occurrence of the abnormality, the frames subsequent to the image at the time of the occurrence of the abnormality can be sequentially or intermittently displayed. Note that the abnormality detection area can be selectively displayed also on the image after the occurrence of the abnormality.

Next, the detailed operation of the image sensor 2 will be described with reference to the flowcharts of FIGS. 8 and 9 show the abnormality detection logic of the image sensor 2. FIG.
The illustrated operation is started when the power of the image sensor 2 is turned on. In step S11, the image sensor 2 captures an image. This image is stored in the current image storage area 227.
Note that the current image storage area 227 sequentially stores and rewrites an image of a total of three frames including this image and the two frames preceding it.

In step S12, the mode storage area 225
It is determined whether or not the alert set mode is set in the. If the mode is not the alert set mode (it is the alert release mode), the process returns to step S11. In the alert release mode, there is a legitimate user in the monitoring area, and there is no need to determine the presence or absence of a subsequent intruder. If the mode is the alert set mode, the process proceeds to step S13.

In step S13, it is determined whether a moving object has been detected. One example of this procedure has already been described with reference to FIG. When a moving object is detected, it is determined that an abnormality has occurred, and the process proceeds to step S14. At this time, the coordinates of the abnormality detection area are calculated, and the abnormality detection area data storage area 2 is calculated.
29. If no moving object is detected, it is determined that no abnormality has occurred, and the process returns to step S11.

In step S14, it is determined whether or not there is a free space in the abnormal image storage area 228 (FIG. 5) of the storage means 220. If there is no free space in the abnormal image storage area 228,
Since the occurrence of an abnormality has already been detected, the abnormal state is stored in the state storage area 224 in step S24, and the process returns to step S11. If there is a vacancy, the process proceeds to step S15.

In step S15, the coordinates of the abnormality detection area calculated in step S13 are stored in the abnormality detection area data storage area 229. In step S16, the current image and the image of the previous two frames are stored in the abnormality image storage area 228. Is stored. In step S17, the abnormal state is stored in the state storage area 224. In step S18, the image captured from the imaging unit 203 is stored in the current image storage area 227.

In step S19, the aforementioned step S13
In the same manner as described above, it is determined whether a moving object has been detected, that is, whether an abnormality has occurred, and the coordinates of the abnormality detection area are calculated. Here, when an abnormality is detected, the coordinates of the abnormality detection area are stored in the abnormality detection area data storage area 229 in step S20,
Proceed to step S21. If no moving object is detected in step S19, the process proceeds directly to step S21.

In step S21, the current image is stored in the abnormal image storage area 227. At this time, the image is stored after the already stored image. In step S22, it is determined whether or not the number of frames of the image stored in the abnormal image storage area 227 has reached 7, and if not, step S24.
Until 1 is added to n and the image of 7 frames is stored.
The operation of steps S17 to S21 is repeated. When the images of the seven frames are stored, the process proceeds to step S22, where n is reset to 0, and the process returns to step S11.

By the above-described abnormality detection logic, the image at the time of occurrence of the abnormality and the previous two images are stored in the abnormal image storage area 227.
A total of 10 frames of the image of the frame and the following 7 frames are stored. Also, abnormal image storage area 2
If an abnormality detection area exists in each of the eight frames of images stored in 27, the abnormality detection area coordinates are stored corresponding to the image.

FIG. 10 is a flowchart showing the operation of the image sensor 2. This operation is started when the power of the image sensor 2 is turned on. In step S31, an initial setting of the image sensor 2 is performed. This initial setting is performed in the controller 1 as described above, and the image sensor 2
Data is received from the controller 1, the data is stored in the parameter area 222, and the height, angle, and the like of the imaging unit 203 are set based on the stored data. When the initialization is completed, the process proceeds to step S32.

In step S32, it is determined whether or not a status call signal has been received from controller 1. Upon reception, the current state stored in the state storage area 224, that is, a normal signal or an abnormal signal is transmitted in step S33. After transmitting the abnormal signal, the state storage area 224 is returned to the normal state. If the status call signal has not been received, step S33 is skipped.

In step S34, it is determined whether an abnormal image request signal has been received from the controller 1. Upon reception, in step S35, the abnormal image stored in the abnormal image storage area 228 and the abnormality detection area data storage area 229
And transmits the detection area coordinates stored in. If the abnormal image request signal has not been received, step S35 is skipped.

In step S36, it is determined whether or not an abnormal image erasure signal has been received from controller 1. Upon reception, in step S37, the abnormal image and the detection area coordinates are deleted from the abnormal image storage area 228. If the abnormal image erasure signal has not been received, step S37 is skipped. In step S38, it is determined whether or not a mode transition signal has been received from controller 1. When receiving,
In step S39, the set alert set mode or alert release mode is stored in the mode storage area 225, and the process returns to step S31. If an abnormal image erasure signal has not been received, step S39 is skipped and the process returns to step S31.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a monitoring system to which an image monitoring system according to the present invention is applied.

FIG. 2 is a method 1 for detecting an abnormality from an image of an image sensor.
The figure explaining an example.

FIG. 3 is a time chart for explaining the operation of the image monitoring system in FIG. 1;

FIG. 4 is a diagram showing a configuration of the image sensor of FIG. 1;

FIG. 5 is a diagram showing contents of a storage unit in the image sensor of FIG. 4;

FIG. 6 is a diagram showing a configuration of a controller in FIG. 1;

FIG. 7 is a diagram showing a configuration of a security center device of FIG. 1;

FIG. 8 is a flowchart (part 1) illustrating an abnormality detection logic of the image sensor of FIG. 4;

FIG. 9 is a flowchart (part 2) illustrating abnormality detection logic of the image sensor of FIG. 4;

FIG. 10 is a flowchart showing the operation of the image sensor of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Controller 101 ... Control part 102 ... Power supply circuit 103 ... Sensor monitoring circuit 104 ... Modem 105 ... Image sensor communication control part 106 ... Video input / output control part 107 ... Display part 108 ... Setting means 2 ... Image sensor 201 ... Control means 202 ... Power supply 203 ... Imaging means 204 ... Infrared light projecting means 205 ... Image processing means 206 ... Display means 207 ... Communication means 208 ... Image output means 209 ... Switching means 210 ... Address setting unit 211 ... Operation means 220 ... Storage means 221 ... Program Area 222 Parameter area 223 Work area 224 State storage area 225 Mode storage area 226 Reference image storage area 227 Current image storage area 228 Abnormal image storage area 229 Abnormal detection area data storage area 3 Fire sensor 4 ... emergency button 5 ... mode setting device 6 ... Telephone line 7 Security center device 701 Control unit 702 Communication interface 703 Image information storage unit 704 Monitor 705 Operation unit 706 Image output unit 8 Analog signal line 9 Digital signal line 10 Monitor device

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 3, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 7

FIG. 5

FIG. 6

FIG. 8

FIG. 9

FIG. 10

Claims (4)

[Claims] 1. An image of a monitoring area is photographed, the presence or absence of an abnormality is determined from the obtained image, and when an abnormality is detected, image data representing an image at the time of occurrence of the abnormality and abnormality detection in the image An image sensor that outputs region data indicating a region; an image when the abnormality has occurred; and an image that indicates the abnormality detection region in the image when the abnormality has occurred, based on the input image data and the region data. An image monitoring system, comprising: a security center device that can be created and displayed on a display unit. 2. The image sensor is connected to the security center via a communication line, and when the image sensor detects an abnormal signal, communication with the security center is started, and the image sensor outputs The image monitoring system according to claim 1, further comprising a controller that outputs the image data and the area data to the security center via a communication line. 3. An imaging unit; a unit for determining whether an abnormality has occurred from an image captured by the imaging unit; a unit for outputting image data of an image when the determination unit detects an abnormality; Means for outputting area data indicating an abnormality detection area in the image at the time of occurrence. 4. A means for creating an image at the time of occurrence of an abnormality and an image showing an abnormality detection area in the image from the input image data at the time of the occurrence of the abnormality and the area data indicating the abnormality detection area, A security center device comprising: a display unit; and a control unit that selects an image at the time of occurrence of the abnormality and an image indicating the abnormality detection area in the image and displays the image on the display unit.