JP2009290542A - Remote monitoring system for monitor camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote monitoring system for a monitor camera in which a fault or an abnormality occurrence situation in the monitor camera is appropriately and speedily recovered. <P>SOLUTION: A remote monitoring system includes: a client image abnormality notifying means 51 of a client owned terminal device 5 provided at a client side where a monitor camera 1 is installed; and a maintenance base image abnormality notification means 61 for a maintenance base terminal device 6 provided at a maintenance base where repair or maintenance is performed. In accordance with an image abnormality occurrence situation discriminated by an image abnormality discriminating means 22 of a remote monitoring apparatus 2, an image abnormality notification means 23 of a monitoring center 3 includes, at the monitoring center 3, an image abnormality classifying means 32 for selecting either the client image abnormality notification means 51 or the maintenance base image abnormality notification means 61 as a destination to be notified about occurrence of image abnormality. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a remote monitoring system for a monitoring camera that detects an abnormality in an image of a monitoring camera used for crime prevention or monitoring purposes and issues a recovery work instruction.

  Conventionally, in the work of crime prevention and security at entrances and exits of buildings, various facilities, equipment, etc., a surveillance camera has been installed to take pictures of areas that need to be monitored, and monitoring is performed by displaying and recording the images of this surveillance camera. The device is widely used.

  Here, when a failure occurs in the surveillance camera or the signal transmission path from the surveillance camera and the video signal is interrupted, a synchronization signal (horizontal synchronization signal, vertical synchronization signal) included in the video signal of the surveillance device is detected in the surveillance device. The function of determining an event (synchronization signal lost) that is no longer performed and notifying a maintenance site or the like is used in many monitoring apparatuses and image recording apparatuses (see, for example, Patent Document 1).

In addition, in the situation where this sync signal is detected normally, a method has been proposed for detecting an abnormality and generating a warning or warning when an abnormality occurs in the image state that interferes with the monitoring operation. In this type of apparatus and method, a plurality of image statistics are calculated from images of a surveillance camera, and fluctuations in these image statistics are detected, thereby detecting the occurrence of an abnormality in the image and determining the state of occurrence of the abnormality. An image abnormality detection apparatus (see, for example, Patent Document 2) that performs the above has been proposed.
JP 2004-59209 A JP 2006-352644 A

  In the monitoring devices exemplified in Patent Document 1 and Patent Document 2, when a monitoring camera failure or image abnormality occurs, a remote monitoring device that monitors the failure of the monitoring camera detects the failure or image abnormality, and remote monitoring is performed. The apparatus notifies the monitoring center of the failure status of the monitoring camera and the occurrence of image abnormality. The monitoring center notifies the maintenance site in charge of the monitoring camera of the occurrence of a monitoring camera failure, and the maintenance site receives notification of the failure of the monitoring camera or the occurrence of an image abnormality. Procedures are in place to check the status of the surveillance camera, and if necessary, adjust or replace parts / equipment to restore the surveillance camera function.

  However, in a failure state of the surveillance camera, for example, the surveillance camera is out of focus and the screen is blurred, or the surveillance camera lens or lens protection cover is contaminated with water drops, insects, etc. This does not correspond to a device failure such as a difference in the image, and there are cases where the image of the monitoring camera can be restored to normal by performing physical operations (focus adjustment, cleaning, camera position correction), etc. related to the monitoring camera.

  On the other hand, due to a failure in the power supply or image signal circuit of the surveillance camera or a failure in a cable for transmitting an image signal from the surveillance camera to the remote monitoring device, the remote monitoring device does not produce an image although there is a synchronization lost or synchronization signal ( When a situation occurs, it is impossible to recover the physical operation of the customer, so the maintenance staff is dispatched to the customer's equipment by the image abnormality notification to the maintenance base and confirms the function of the surveillance camera. If necessary, replacement of surveillance camera devices and cables was performed to restore the surveillance camera functions.

  However, in the procedure for restoring the surveillance camera function according to the conventional method, even if the customer can restore the surveillance camera function, the maintenance site is notified of the image abnormality, and the maintenance staff As a result, the functions of the surveillance camera were checked and the failure was dealt with, causing problems such as the time it takes for the maintenance staff to arrive at the customer's facility and the personnel costs of the maintenance staff to be dispatched. there were.

  An object of the present invention is to provide a remote monitoring system for a monitoring camera that can appropriately and quickly recover from a failure or abnormality occurrence of the monitoring camera.

In order to solve the above problems, the present invention mainly adopts the following configuration.
A monitoring camera, an image capturing unit that captures an image from the monitoring camera, an image abnormality determining unit that determines an abnormality occurrence state of an image with respect to an image captured by the image capturing unit, and an image abnormality determining unit A remote monitoring device having an image abnormality transmission means for reporting an abnormality occurrence state of an image via a communication means, an image abnormality reception means for receiving an abnormality occurrence state of an image transmitted from the image abnormality transmission means, A monitoring camera remote monitoring system comprising a monitoring center having an image abnormality notification means for notifying the occurrence of an abnormality, and a customer image for notifying the occurrence of an abnormality in an image provided on a customer side where the monitoring camera is installed A customer-owned terminal device having an abnormality notification means and a maintenance base image abnormality notification hand for notifying the occurrence of an abnormality in an image provided on the maintenance base side for repair or maintenance A maintenance base terminal device, and the customer image abnormality notification as a notification destination of the abnormality of the image corresponding to the abnormality occurrence state of the image determined by the image abnormality determination means of the remote monitoring device The monitoring center is provided with an image abnormality classification means for selecting either one of the means and the maintenance site image abnormality notification means. With this configuration, it is possible to appropriately and quickly recover from a monitoring camera failure or abnormality occurrence.

  In the remote monitoring system for the monitoring camera, the image abnormality notifying unit of the monitoring center transmits a display image of a recovery method assumed by the customer when notifying the customer image abnormality notifying unit. . Further, the customer-owned terminal device having the customer image abnormality notification means is provided with customer-side recovery notification means for notifying the monitoring center of the availability of image recovery work and completion of image recovery, and image recovery from the customer-side recovery notification means. When the monitoring center does not receive a no signal or a signal indicating completion of image restoration within a predetermined time, the image abnormality notifying means of the monitoring center detects the occurrence of an image abnormality and the maintenance base image of the maintenance base terminal device. The abnormality notification unit is notified.

  According to the present invention, in the case of an image abnormality that can be recovered by the customer, the monitoring center that has received the image abnormality sends the abnormality occurrence information to the customer image abnormality notification unit installed on the customer side along with the image abnormality recovery method. If the customer is unable to recover or does not receive a recovery signal even after a predetermined time has passed after notification to the customer side, to the maintenance base image abnormality notification means side provided in the maintenance base that maintains the building equipment, Since the image abnormality is notified, appropriate and quick recovery can be performed, and unnecessary dispatch of maintenance workers can be reduced.

  A remote monitoring system for a monitoring camera according to an embodiment of the present invention will be described in detail below with reference to FIGS.

  FIG. 1 is a block diagram showing the overall configuration of a remote monitoring system for a monitoring camera (eg, security camera) according to an embodiment of the present invention. FIG. 2 is a flowchart showing an initial setting procedure for discrimination used by the image abnormality discrimination means in the remote monitoring apparatus according to the present embodiment. FIG. 3 is a diagram showing pixel coordinates and calculation formulas on the screen when calculating the pixel correlation value C used by the image abnormality determination unit in the remote monitoring apparatus according to the present embodiment. FIG. 4 is a flowchart showing the determination procedure used by the image abnormality determination means in the remote monitoring apparatus according to this embodiment. FIG. 5 is a diagram showing a table in which the image statistical values of the images used in the image abnormality determination unit in the remote monitoring apparatus according to the present embodiment, the state of the image abnormality, and the factor notification destination are associated with each other. FIG. 6 is a flowchart showing a monitoring procedure at the monitoring center and a notification procedure when an image abnormality occurs according to the embodiment of the present invention.

  In FIG. 1, a remote monitoring system for a monitoring camera according to an embodiment of the present invention has, as a basic configuration, a monitoring camera 1, a remote monitoring device 2, a monitoring center 3, communication means 41, 42, 43, and a customer. It comprises an owned terminal device 5 and a maintenance base terminal device 6. 1 is a surveillance camera that is installed in a monitored area and has a function of acquiring a surveillance image and outputting it as a video signal. 2 is a remote monitoring device installed in a customer side facility. The image capturing means 21 for capturing image data from the image signal from the camera 1, the image abnormality determining means 22 for detecting the occurrence state of the image abnormality from the image captured by the image capturing means 21, and the image abnormality determining means 22 detect the image abnormality. The image abnormality transmission means 23 having a function of transmitting the fact that an image abnormality has occurred in the monitoring center 3 and the image abnormality occurrence status to the monitoring center 3 via a communication means 41 such as a public telephone line when detected. ing. The remote monitoring device 2 may include image recording means 24 having a function of storing an image from the monitoring camera 1 in a storage medium such as a hard disk.

  Reference numeral 3 denotes a monitoring center. The monitoring center 3 is electrically connected to an image abnormality receiving means 31 having a function of receiving an image abnormality occurrence from the remote monitoring device 2 and an image abnormality caused by a mechanical factor depending on an image abnormality occurrence state. Image abnormality classifying means 32 having a function of classifying according to factors, and the customer image abnormality notifying means 51 or the maintenance base image abnormality notifying means 61 based on the classification result by the image abnormality classifying means 32 to the public telephone line, public network, closed network Image abnormality notifying means 33 having a function of notifying that an image abnormality has occurred via the communication means 42, 43.

  Reference numeral 5 denotes a customer-owned terminal device such as a personal computer, PDA, or mobile phone. The customer-owned terminal device 5 includes a customer image abnormality notifying unit 51 and a customer-side recovery notifying unit 52. As the customer image abnormality notification means 51, a personal computer installed at a customer base and equipped with mail receiving software, an Internet browser, a messenger, etc., or a mobile phone or PDA carried by the customer can be cited. Examples of the customer side recovery notifying means 52 include means for clicking a URL (Universal Resource Locator) or a button displayed in the mail text or on the browser screen, and means for pressing an operation button.

  Reference numeral 6 denotes a maintenance base terminal device, which has a maintenance base image abnormality notification means 61. As specific notification means possessed by the maintenance base image abnormality notification means 61, it is installed at the maintenance base, and includes mail receiving software and an Internet browser. A personal computer equipped with a messenger or the like, or a mobile phone or PDA carried by a maintenance staff.

  Next, the image abnormality determination unit 22 in the remote monitoring apparatus according to this embodiment will be described in detail below. In the image abnormality determination means 22, an image statistical value calculation function for calculating a plurality of image statistical values from the image captured by the image capturing means 21, and a normal image statistical value related to an image in a normal state such as after inspection of the monitoring camera 1 The image statistic storage function is stored.

  Here, the image statistical values in the present embodiment are the following image statistical values. The pixel average value A is an average value of the luminance values of the image. The pixel variance value V is a variance value of the luminance value of the image. The differential pixel average value D is an average value of the luminance values of the pixels of the image obtained by first differentiating the image in the scanning line direction (horizontal). As shown in the equation of FIG. 3, the image correlation value C is a difference value between a normal pixel sample group (for example, a 16 × 16 coordinate group on the image) and a pixel sample group of the current same coordinate group. Squared and integrated. The hue average value S is an average value of an S (Saturation) image when the image is converted into an HSV color space actor.

  In the image statistical value storage function of the image abnormality determination means 22, the above-described normal values Ai, Vi, Di, Ci, Si of the image statistical values A, V, D, C, S are stored.

  Next, the operation of the surveillance camera remote monitoring system according to the embodiment of the present invention will be described with reference to the flowcharts of FIGS. First, the remote monitoring device 2 performs a procedure (initial setting procedure) for setting a reference for detecting an image abnormality prior to the detection of the image abnormality of the monitoring camera 1.

  The initial setting procedure of the remote monitoring device 2 shown in FIG. 2 is performed after confirming that the image of the monitoring camera 1 is normal at the time of installation or inspection of the monitoring camera 1. In the initial setting procedure, the remote monitoring device 2 captures a normal image from the surveillance camera 1 by the image capturing means 21 (procedure S1).

  Subsequently, the image abnormality determination unit 22 uses the image statistical value calculation function to calculate the pixel average value Ai, the pixel variance value Vi, the differential pixel average value Dl, and the saturation average value Si from the normal image captured in step S1. Is calculated. Further, the image abnormality determination means 22 obtains a pixel sample Pi (x, y) for calculating the image correlation value C from the normal image (procedure S2).

  Next, the image abnormality determination unit 22 stores the image statistical value and the pixel sample calculated in step S2 by the image statistical value storage function (step S3). Thereafter, when detecting the occurrence of an abnormality in the image, the image statistical values Ai, Vi, Di, Si and the pixel sample Pi are referred to.

  Next, a procedure for detecting an image abnormality in the remote monitoring system according to the present embodiment will be described with reference to FIG. After completing the initial setting described above, the remote monitoring device 2 performs a procedure (FIG. 4) for detecting an image abnormality of the monitoring camera 1. First, the remote monitoring device 2 captures the current image of the monitoring camera 1 from the monitoring camera 1 by the image capturing means 21 (step S4).

  Subsequently, the image abnormality determination unit 22 calculates the pixel average value A, the pixel variance value V, the differential pixel average value D, and the saturation average value S from the current image captured in step S4 by the image statistical value calculation function. calculate. Further, the image abnormality determination means 22 obtains a pixel sample P (x, y) for calculating the image correlation value C from the current image (procedure S5).

  Next, the image abnormality determination means 22 refers to the image statistical value calculated in step S5 and the image statistical value and pixel sample at the normal image stored by the image statistical value storage function in step S3 shown in FIG. The table shown in FIG. 1 is sequentially referred to, and the occurrence state and the cause of occurrence of the image abnormality are estimated using the image statistical value and pixel sample in the normal image, and the image statistical value and pixel sample of the current image (step S6).

  Here, in step S6, with reference to the table of FIG. 5, occurrence of image abnormality is detected according to the following criteria. A detailed determination method of this image abnormality will be described below.

  No. When there is no synchronization signal represented as 1, the synchronization signal (vertical synchronization signal and horizontal synchronization signal) from the monitoring camera 1 cannot be detected by the image capturing means 21. In this case, it is assumed that an abnormality has occurred in the monitoring camera 1, the cable connecting the monitoring camera 1 and the remote monitoring device 2, and the failure is determined to be due to an electrical factor.

  No. When the image represented by 2 is pure white, the image from the monitoring camera 1 indicates a situation where the image is pure white. In this case, since the pixel value of the entire screen is high, if the pixel average value A of the image exceeds a predetermined maximum pixel average Ahigh, it is determined that the image is abnormal and a failure due to an electrical factor is determined.

  No. When the image represented as 3 is completely black, the image from the monitoring camera 1 indicates a situation where the image is completely black. In this case, since the pixel value of the entire screen is low, if the pixel average value A of the image falls below a predetermined minimum pixel average Allow, it is determined that the image is abnormal and a failure due to an electrical factor is determined.

  No. When there is no image information represented as 4, the image from the monitoring camera 1 indicates a situation in which no significant information is included in the image (for example, the image is gray). In this case, when the pixel dispersion value V of the entire screen falls below a predetermined pixel dispersion value lower limit Vlow, it is determined that the image is abnormal and a failure due to an electrical factor is determined.

  No. In the case of no color represented as 5, in the image from the monitoring camera 1, color information is missing from the image, and a black and white image is obtained. In this case, when the saturation S of the current image is lower than the value in consideration of the tolerance Sm from the saturation Si at the normal time, it is determined that the image is abnormal and a failure due to an electrical factor is determined.

  No. In the case of the occurrence of blurring represented as 6, the image from the monitoring camera 1 indicates a situation where the image is blurred due to a poor focus adjustment of the lens. In this case, since the differential pixel average value D of the current image decreases, if the differential pixel average value D falls below the value considering the tolerance Dm2 from the normal differential pixel average value Di, it is determined that the image is abnormal. Judged as a failure due to mechanical factors.

  No. In the case of occurrence of cloudiness / white turbidity represented by 7, the image from the monitoring camera 1 is in a state where the image is blurred due to a poor focus adjustment or the like of the lens or the glass of the housing housing the monitoring camera. In this case, since the differential pixel average value D of the current image decreases, if the differential pixel average value D falls below the value considering the tolerance Dm2 from the normal differential pixel average value Di, it is determined that the image is abnormal. Judged as a failure due to mechanical factors.

  No. In the case of the occurrence of stains represented as 8, in the image from the surveillance camera 1, stationary noise is generated in the image due to the attachment of the lens or the glass of the housing that houses the surveillance camera to dirt or other contaminants. Shows the situation. In this case, since the differential pixel average value D of the current image increases, if the differential pixel average value D exceeds a value considering the tolerance Dml from the normal differential pixel average value Di, it is determined that the image is abnormal. Judged as a failure due to mechanical factors.

  No. In the case of changing the shooting angle of view represented as 9, in the image from the monitoring camera 1, the monitoring camera has a shooting angle of view due to a failure of the fixing means of the monitoring camera or an intentional change of the shooting direction of the monitoring camera. Indicates changed status. In this case, since the image correlation value C between the pixel sample Pi (x, y) of the normal image calculated by the procedure shown in FIG. 3 and the current pixel sample P (x · y) increases, the image correlation value C Exceeds the predetermined image correlation value upper limit High, it is determined that the image is abnormal and a failure due to a mechanical factor is determined.

  Next, the image abnormality determination means 22 determines whether or not an abnormality has occurred in the image from the monitoring camera 1 in step S6 shown in FIG. 4 (step S7). If an abnormality has occurred, step S6 is performed. Is transmitted to the image abnormality receiving means 31 of the monitoring center 3 through the communication means 41 together with the image abnormality occurrence factor determined in (see “Factor” shown in FIG. 5) (step S9). If no abnormality has occurred, the process returns to step S4.

  Next, the operation of the monitoring center 3 in the remote monitoring system according to the present embodiment will be described with reference to FIG. In the monitoring center 3, the image abnormality receiving means 31 waits for reception of a monitoring camera image abnormality report from the remote monitoring device 2 (step S10). Here, when the image abnormality receiving unit 31 receives the monitoring camera image abnormality report from the remote monitoring device 2, the image abnormality classification unit 32 estimates the failure factor of the monitoring camera 1 from the content of the received report. (Procedure S11).

  Here, when it is determined that the failure factor of the surveillance camera 1 is a mechanical factor, and it is possible to perform operations such as determination of the situation by the customer, adjustment and cleaning of the lens of the surveillance camera, and correction of the installation state of the camera, an image abnormality notification Means 33 includes information indicating that the monitoring camera 1 has failed in the customer-owned terminal device 5 such as a personal computer owned by the customer, a PDA carried by the customer, or a mobile phone, and the image abnormality determined by the image abnormality determining means 22. And the work content necessary to restore the image abnormality situation are notified to the customer image abnormality notifying means 51 via the communication means 42 (step S13). Here, the communication means 42 is a public network such as a public telephone line or the Internet, or a closed network, and examples of notifications include mail, message transmission, and pop-up screen display of a network browser.

  Next, in step S13, the customer who has been notified of the information indicating that the surveillance camera 1 has failed, the status of the image abnormality, and the work content necessary to recover the situation of the image abnormality, displays the image and status of the surveillance camera 1. If it is confirmed and recovery is possible, the customer-side recovery notification means 52 in the customer-owned terminal device 5 is used to notify the monitoring center 3 of the completion of the recovery of the monitoring camera 1, and based on this, the maintenance base terminal The apparatus is notified (step S15). Therefore, since the customer was able to deal with it, there is no need for maintenance, etc., and there is no labor cost due to recovery.

  On the other hand, in step S12, when the failure factor of the surveillance camera 1 is an electrical factor and it is necessary to check the state of the equipment such as the surveillance camera 1 or wiring, or to repair the equipment by replacing the equipment, an image abnormality notification is made. The means 33 includes information indicating that the surveillance camera 1 has failed in the maintenance base terminal device 6 such as a personal computer installed at the maintenance base, a PDA carried by a maintenance staff, a mobile phone, etc., and an image abnormality determination means 22. The determined image abnormality status and the work content necessary to recover the image abnormality status are notified via the communication means 43 (step S16), and a maintenance person in charge of the customer is dispatched to check the status of the device. Or repair is performed (step S17).

  In addition, in step S13, the customer who has been notified of the information indicating that the monitoring camera 1 has failed, the status of the image abnormality, and the work content necessary to recover the state of the image abnormality is within a predetermined time. When notifying the restoration completion or notifying that the customer has not been able to recover from the failure (step S14), the image abnormality notifying means 33 is carried by a personal computer or maintenance personnel installed at the maintenance base. Information necessary for the maintenance base terminal device 6 such as a PDA or a mobile phone to indicate that the surveillance camera has failed, the status of the image abnormality determined by the image abnormality determination means 22, and the work necessary to restore the image abnormality status The contents and the results of the investigation by the customer are notified via the communication means 43 (step S16), and the maintenance staff in charge of the customer is dispatched to check the status of the equipment and perform repairs. (Step S17).

  As described above, in the remote monitoring system of the monitoring camera, when an image abnormality occurs in the monitoring camera, it is possible to determine the state and the cause of the image abnormality and provide a failure repair means that is shorter in time and cost. As a result, it is possible to reduce the operating cost of the system including the monitoring camera and the remote monitoring system and to shorten the non-operation time of the monitoring camera.

It is a block diagram which shows the whole structure of the remote monitoring system of the monitoring camera (for example, security camera) which concerns on embodiment of this invention. It is a flowchart which shows the procedure of the initial setting for the discrimination | determination used by the image abnormality discrimination | determination means in the remote monitoring apparatus regarding this embodiment. It is a figure showing the coordinate and calculation formula of the pixel on a screen at the time of calculating the pixel correlation value C used by the image abnormality discrimination | determination means in the remote monitoring apparatus regarding this embodiment. It is a flowchart which shows the discrimination | determination procedure used by the image abnormality discrimination | determination means in the remote monitoring apparatus regarding this embodiment. It is a figure which shows the table which linked | related each image statistical value of the image used by the image abnormality determination means in the remote monitoring apparatus regarding this embodiment, the condition of image abnormality, and a factor alerting | reporting destination. It is a flowchart which shows the alerting | reporting procedure at the time of the monitoring in the monitoring center and image abnormality generation regarding embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surveillance camera 2 Remote monitoring device 21 Image capture means 22 Image abnormality determination means 23 Image abnormality transmission means 24 Image recording means 3 Monitoring center 31 Image abnormality reception means 32 Image abnormality classification means 33 Image abnormality notification means 41, 42, 43 Communication means DESCRIPTION OF SYMBOLS 5 Customer-owned terminal apparatus 51 Customer image abnormality notification means 52 Customer side recovery notification means 6 Maintenance base terminal apparatus 61 Maintenance base image abnormality notification means

Claims (3)

A surveillance camera,
Image capturing means for capturing an image from the surveillance camera, image abnormality determining means for determining an abnormality occurrence state of an image with respect to an image captured by the image capturing means, and occurrence of an image abnormality determined by the image abnormality determining means A remote monitoring device having an abnormal image transmission means for reporting the situation via communication means;
Surveillance camera remote monitoring system comprising: an image abnormality receiving means for receiving an abnormality occurrence state of an image transmitted from the image abnormality transmitting means; and a monitoring center having an image abnormality notifying means for notifying the occurrence of an abnormality of the image. Because
A customer-owned terminal device having customer image abnormality notifying means for notifying the occurrence of an image abnormality provided on the customer side where the monitoring camera is installed, and the image abnormality occurrence provided on the maintenance base side performing repair or maintenance are notified. A maintenance base terminal device having maintenance base image abnormality notification means,
Corresponding to the abnormality occurrence state of the image determined by the image abnormality determination unit of the remote monitoring device, either the customer image abnormality notification unit or the maintenance site image abnormality notification unit is used as a notification destination of the abnormality of the image. A remote monitoring system for a monitoring camera, characterized in that image abnormality classification means for selecting one is provided in the monitoring center. In claim 1,
The remote monitoring system for a monitoring camera, wherein the image abnormality notification unit of the monitoring center transmits a display image of a recovery method assumed by a customer when notifying the customer image abnormality notification unit. In claim 1 or 2,
The customer-owned terminal device having the customer image abnormality notification means is provided with customer-side recovery notification means for notifying the monitoring center of the availability of image recovery work and completion of image recovery, and the customer-side recovery notification means When the monitoring center does not receive a signal or a signal indicating completion of image restoration within a predetermined time, the image abnormality notifying means of the monitoring center notifies the occurrence of an image abnormality to the maintenance base image abnormality notification of the maintenance base terminal device. A remote monitoring system for a monitoring camera, characterized by notifying a means.

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