JPH0865553A - Abnormality notifying device for monitor camera - Google Patents

Abstract

PURPOSE: To make it possible to notify abnormality to a monitor station even at night by comparing received data with reference image memory data, and if both data are mutually different, transmitting image data stored in a buffer memory to the monitor station. CONSTITUTION: Data photographed by a monitor camera 3 are stored in a work area of the buffer memory 4 by a control part 1 and reference image data are stored in a reference image memory 5. The control part 1 stores inputted image data in the buffer memory 4 and compares the data stored in the memory with data stored in the memory 5 by the use of a comparing part 6. When a discriminating part 11 discriminates that both data are different each other by a compared result, data in the memory 4 is converted into a facsimile (FAX) signal through a FAX signal conversion part 8, auto-dialing by a line control unit (NCU) 10 through a MODEM 9, and the FAX signal is transmitted to a monitor station through a telephone line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality notification device for a surveillance camera, which detects an abnormality in an image captured by a surveillance camera and notifies that an abnormality has occurred at a remote place.

[0002]

2. Description of the Related Art Conventionally, a method of monitoring an image captured by a surveillance camera to detect an abnormality is to transmit an image signal captured by the surveillance camera and converted into an electric signal to a surveillance station by a cable or the like to monitor it. I was observing the monitor screen at the place to check for abnormalities. However, when there are many monitoring stations and most of the monitoring stations are unattended at night, the image notifying the abnormality is, for example, V
Even if it was recorded in TR etc., the screen could not be observed until the next morning, so it was inconvenient because it was not possible to detect the presence or absence of abnormality.

[0003]

In the above-mentioned conventional technique, since the abnormality that occurs in the unmanned state at night is not detected at the monitoring station until the next morning, the response to the abnormality is delayed and there is a risk of causing a serious accident. Since the present invention has a problem that the abnormality is detected, the present invention transmits the fact that the abnormality is detected to the monitoring station even at night and notifies the monitoring station of the occurrence of the abnormality. An object of the present invention is to provide an abnormality notification device for a surveillance camera that enables it.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention converts a captured optical image into an electrical image signal and outputs it, and a monitoring camera A buffer memory for inputting and temporarily storing, a comparing unit for comparing the data in the buffer memory and the data stored in the reference image memory, a determining unit for determining a comparison result of the comparing unit, and a result for the determination Transmission means for transmitting the data in the buffer memory based on the above.

[0005]

With the above-mentioned structure, according to the abnormality notification device for a surveillance camera of the present invention, the control unit stores the image data received from the surveillance camera in the area different from the area normally used in the buffer memory. The data is stored as data, the control unit compares the received data with the reference image memory data in the comparison unit, and the determination unit determines that the comparison result is different, and if different, stores it in the buffer memory. The converted image data is converted into a FAX signal, modulated by a modem, and transmitted to a monitoring station via a telephone line by auto dialing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an abnormality notification device for a surveillance camera according to the present invention will be described below. In FIG. 1, reference numeral 1 denotes a control unit, which includes a program memory 2, a buffer memory 4 for storing image data of the camera 3, a reference image memory 5, and a comparison unit 6 for comparing image data. An automatic dial unit 7, a discriminating unit 11, a signal converting unit 8 for converting into a FAX signal, and a modem 9 are connected to an NCU (line control unit) 10 connected to an external telephone line.

Next, the operation of the abnormality notification device for the surveillance camera having the above configuration will be described. The image data captured by the monitoring camera 3 is stored in the work area of the buffer memory 4 that is normally used by the control unit 1, and the reference image data is stored in the reference image memory 5. When the image data is input, the control unit 1 stores the input data in the buffer memory 4 and compares it with the data stored in the reference image memory 5 by the comparison unit 6, and the comparison result is different. In order to notify the monitoring station of the data in the buffer memory 4, the determination unit 11 determines that the data is converted into a FAX signal via the signal conversion unit 8 and is automatically dialed from the modem 9 by the NCU unit 10 from the telephone line. Sent.

In FIG. 2, the data in the reference image memory 5 is treated as an update memory so that it can be gradually updated. For example, when the room becomes brighter in the morning, the data in the update memory also gradually increases. It is made brighter, and when the room suddenly becomes bright, for example, when the room lighting is turned on, it is determined that an abnormality has occurred. The image data is stored in the normally used work area of the buffer memory 4 by the control unit 1, the image data captured last time is stored in the update memory 5, and when the image data is input, the control unit 1 The input data is stored in the buffer memory 4 and is compared with the data stored in the reference image memory 5 by the comparison unit 6, and the result of this comparison Discriminating section 11 that are different
Determines. In this case, the determination unit 11 determines, for example, whether the brightness is 0 to 256 in order to determine whether or not there is a rapid change.
The gradation of the predetermined value is set by the threshold detection unit 12 as a threshold, and when a change exceeding the threshold occurs, it is determined that an abnormality has occurred. Changes that do not exceed are not considered abnormal and the update memory is updated.

[0009]

As described above, according to the abnormality notification device for a surveillance camera of the present invention, when the image data from the surveillance camera is updated, the updated image data is transmitted to the surveillance station through the FAX. FA at the monitoring station
When X is received, it is possible to know that an abnormality has occurred by the received sound, which is convenient because it is not necessary to constantly monitor the monitor screen.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an abnormality detection device according to the present invention.

FIG. 2 is a block diagram of another embodiment of the abnormality detection device according to the present invention.

[Explanation of symbols]

 1 Control Unit 2 Program Memory 3 Camera 4 Buffer 5 5 Reference Image Memory 6 Comparison Unit 7 D / A Converter 8 Signal Conversion Unit 9 Modem 10 NCU 11 Discrimination Unit

Claims (7)

[Claims] 1. A surveillance camera for converting a captured optical image into an electric image signal and outputting the electrical image signal, a buffer memory for inputting and temporarily storing the image signal of the surveillance camera, and data in the buffer memory. And a comparing unit that compares the data stored in the reference image memory, a determining unit that determines the comparison result of the comparing unit, and a transmitting unit that transmits the data in the buffer memory based on the determined result. An abnormality notification device for surveillance cameras. 2. A surveillance camera for converting a captured optical image into an electrical image signal and outputting the electrical image signal, a buffer memory for inputting and temporarily storing the image signal of the surveillance camera, and data in the buffer memory. A comparison unit that compares the data stored in the update memory, and is compared by the comparison unit,
A determination unit that determines the comparison result of the comparison unit, and a control that updates the data in the update memory to the data in the buffer memory at predetermined time intervals when the determination unit determines that there is no change within a threshold value. An abnormality notification device for a surveillance camera, comprising: 3. A threshold detection unit is provided in the discriminating unit, a minimum threshold is set in the threshold setting unit, and the discriminating unit discriminates a comparison result of the comparing unit and discriminates that the threshold is less than or equal to the minimum threshold. In this case, the abnormality notification device for a surveillance camera according to claim 2, wherein the data in the update memory is updated to the data in the buffer memory at predetermined time intervals. 4. A maximum threshold value is set in the threshold value detecting section,
The image data of the high-brightness object of the reference image is excluded by excluding the area of the image data of the monitoring camera that exceeds the maximum threshold value from the data of the reference image memory so that the image data of the high-brightness image portion is not detected. 3. The abnormality notification device for a surveillance camera according to claim 2, wherein the uneven brightness due to is removed. 5. The abnormality notification device for a surveillance camera according to claim 2, wherein the case where it is determined that the value is equal to or more than the minimum threshold value is repeated at least twice or more. 6. The transmission means includes a signal conversion unit that converts the image data read from the buffer memory into a FAX signal, a modem that modulates the FAX signal, and the FA.
The abnormality notification device for a surveillance camera according to claim 1 or 2, wherein the X signal is transmitted to a telephone line by automatic dialing. 7. A bell for notifying the arrival of a fax is used as the notifying means.
Abnormality notification device for the surveillance camera described.