JP5323508B2 - Surveillance camera device - Google Patents

Description

  The present invention relates to a monitoring device that records a continuously captured monitoring image within a predetermined data capacity using a first-in first-out (FIFO) method and uses the monitoring image after detection of an event to be monitored.

  2. Description of the Related Art Conventionally, a monitoring system for detecting a suspicious person's entry into a store or house has been provided. Among the monitoring systems, there is a monitoring camera system that uses a monitoring camera and can check the status of the monitoring area when an abnormality occurs with an image. Furthermore, the surveillance camera system records an image of the surveillance area, stops the recording of the image when a monitored event such as an intrusion into the building is detected, and the supervisor records the event that occurred before the suspension. Some of them can be played and confirmed. When the monitoring camera system reports that a sensor or the like has detected a monitoring target event, the monitoring camera system stops image recording after a predetermined time.

  Here, in order to reduce the cost of a memory or the like for recording an image, there is generally a limit on the data capacity that can be recorded by the surveillance camera system. Therefore, the recorded image is updated by the FIFO method. In addition, since the timing at which a monitored event is detected is highly important for image storage, after a monitored event is detected, an image can be recorded at a relatively high frame rate so that a high-quality video can be played. Before detection, an image is recorded at a relatively low frame rate to ensure an image recording period.

JP 2002-112246 A

  However, depending on the type of monitoring target event and the detection method, there may be a difference in the recording time and image quality of an image required for confirmation with a reproduced image. For example, when an intrusion action is detected by a sensor, the time from the occurrence of an abnormal condition to the detection of an abnormality detection of the sensor is generally short, in which case the situation at the site immediately before the notification is clear. It is highly necessary to check with a simple image. On the other hand, for example, when a user who has confirmed the presence of a suspicious person is notified of abnormality detection by operating an emergency button, it may take a long time for the user to operate the emergency button. Therefore, it is highly necessary to confirm the situation at the site from a point in time that precedes a certain period of time.

  For this reason, the conventional surveillance camera device that fixes the recording time and the image quality to be recorded, regardless of the type of the monitoring target event and the detection method, may sometimes make it difficult to confirm the occurrence event based on the recorded image. was there.

  The present invention has been made to solve the above-mentioned problems, and a surveillance camera capable of recording an image with an image recording time and image quality required for confirmation by a reproduced image in accordance with the type and detection method of an event to be monitored. An object is to provide an apparatus.

  The monitoring camera device according to the present invention includes an image acquisition unit that acquires an image obtained by capturing a monitoring area at a predetermined period, and at least two types that generate occurrences of monitoring target events detected by different methods in the monitoring area A first monitoring mode for enabling the reporting by the first type of reporting unit and a second monitoring mode for enabling the reporting by the second type of reporting unit. A mode setting unit, a storage unit for storing the image within a predetermined data capacity, and an update process for sequentially overwriting and recording the old image stored in the storage unit with a new acquired image are performed. A control unit that receives the notification and stops the update process, and the control unit varies a recording period of an image to be recorded in the storage unit according to the set monitoring mode.

  In the monitoring camera device, the recording period corresponding to the monitoring mode can be set so as to include a scheduled response period from when the monitoring target event occurs until the notification unit issues a report.

  In a preferred aspect of the present invention, the first type of reporting unit is an automatic reporting unit having a sensor that automatically detects and reports the monitored event, and the second type of reporting unit includes: A manual notification unit having an operation device that is operated by a person who has recognized the monitoring target event, and the control unit is configured to have the second monitoring mode in which the notification by the manual notification unit is valid. In the monitoring camera device, the recording period when set is longer than the recording period when the first monitoring mode in which the notification by the automatic notification unit is valid is set.

  In another preferred aspect of the present invention, the controller monitors the data amount per unit time of an image to be recorded in the storage unit when the second monitoring mode is set. It is a monitoring camera device that makes it smaller than the data amount per unit time of the image to be recorded in the storage unit when is set. The control unit may change a data amount per unit time of the image by adjusting a frame rate or an image quality of the image recorded in the storage unit.

  Another monitoring camera device according to the present invention includes an image acquisition unit that acquires an image obtained by capturing a monitoring region at a predetermined period, a notification unit that reports the occurrence of a monitoring target event in the monitoring region, and the monitoring region A mode setting unit that sets an unattended monitoring mode that is set when the monitoring area is in an unmanned state and a manned monitoring mode that is set when the monitoring area is in a manned state; and a storage unit that stores the image within a predetermined data capacity; An update process for sequentially overwriting and recording old images stored in the storage unit with new acquired images, and a control unit that receives the notification from the notification unit and stops the update process. The control unit sets the image recording period when the manned monitoring mode is set to be longer than the recording period when the unattended monitoring mode is set.

  According to the present invention, an appropriate captured image corresponding to the monitoring mode is recorded in a storage unit having a predetermined data capacity. This facilitates confirmation of the monitoring target event in a reproduction image having an appropriate recording period and image quality according to the type of event to be monitored and its detection method.

1 is a schematic diagram illustrating a schematic configuration of a monitoring system according to an embodiment of the present invention. It is a general | schematic flowchart explaining operation | movement of the monitoring main apparatus in the alerting set mode. It is a schematic diagram explaining the method of recording to the memory | storage part in vigilance set mode. It is a general | schematic flowchart explaining operation | movement of the monitoring main apparatus in alert release mode. It is a schematic diagram explaining the method of recording to the memory | storage part in alert release mode.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating a schematic configuration of a monitoring system according to an embodiment. The monitoring system includes a monitoring camera device 2 disposed in a building where a monitoring area is provided, and a monitoring center 6 that can communicate with the monitoring camera device 2 via a public communication network 4. The monitoring camera device 2 includes a monitoring camera 10, an intrusion sensor 12, an emergency controller 14, and a monitoring main device 16.

  The monitoring system captures a monitoring area with the monitoring camera 10 and monitors the occurrence of an abnormality such as a person entering the monitoring area or a danger. An image captured by the monitoring camera 10 is transmitted to the monitoring center 6 via the public communication network 4. The transmitted image is used by the monitoring center 6 for the monitoring person to confirm the occurrence of the abnormality. The captured image can be transmitted to the monitoring center 6 in real time, or can be recorded by the monitoring main device 16 and a recorded image can be transmitted in response to a request from the monitoring center 6.

  The surveillance camera 10 is installed at a position where the surveillance area can be photographed, and photographs the surveillance area at a predetermined cycle to obtain an image. For example, the monitoring camera 10 captures an image of 5 frames (5 fps) per second.

  The intrusion sensor 12 automatically detects the intrusion of a person into the monitoring area. For example, the intrusion sensor 12 is an open / close sensor that detects that a building window or door has been opened and issues a detection signal, or a space that detects infrared rays emitted by a human body in a monitoring area and issues a detection signal. Such as a sensor.

  The emergency controller 14 is a manual alerting means used when there is a user in the building, for example, an emergency button that is pressed when the user recognizes an intruder or a danger.

  The monitoring main device 16 includes a control unit 20, a storage unit 22, an image signal input unit 24, a detection signal input unit 26, a mode setting unit 28, and a notification unit 30.

  The control unit 20 is configured using a microprocessor (MPU) or the like, and controls the operation of each unit of the monitoring camera device 2 according to a program to be executed. For example, the control unit 20 performs an update process for updating the image stored in the storage unit 22 by the FIFO method, and stops the update process in response to a notification from the intrusion sensor 12 or the emergency controller 14.

  The storage unit 22 includes a memory and stores an image captured by the monitoring camera 10. Since the recording to the storage unit 22 is continued by the control unit 20 in the FIFO manner during the monitoring operation, the recording medium used for the storage unit 22 can withstand long-time use and frequent access. Desired. In this respect, the memory has higher durability and reliability than, for example, a hard disk and satisfies the requirement. On the other hand, since the memory is more expensive than the hard disk, the capacity of the memory mounted as the storage unit 22 in the monitoring camera device 2 is generally not set so large. For example, the storage unit 22 is designed to store 100 frames of images taken by the monitoring camera 10.

  The image signal input unit 24 is an interface circuit that takes an image signal of a captured image from the monitoring camera 10 into the monitoring main device 16 and is connected to the monitoring camera 10 by wire or wirelessly. For example, the image signal input unit 24 includes a frame memory, and can hold an image signal input from the monitoring camera 10 until processing by the control unit 20 is performed. The image acquisition unit of the present invention corresponds to the image signal input unit 24. In addition, it is good also as an image acquisition part of this invention including the monitoring camera 10. FIG.

  The detection signal input unit 26 is an interface circuit that takes in detection signals output from the intrusion sensor 12 and the emergency controller 14 into the monitoring main device 16 and is connected to them by wire or wirelessly.

  The mode setting unit 28 is a unit that sets two monitoring modes to be described later in the control unit 20, and includes an operation unit by which a user selects the monitoring mode. For example, the mode setting unit 28 outputs a signal indicating the selected monitoring mode to the control unit 20 in response to an operation by a user such as a switch or button, an operation using a key or an IC card, or an input of a personal identification number.

  The reporting unit 30 is a communication interface with the monitoring center 6.

  Next, the operation of the monitoring camera device 2 will be described. The monitoring camera device 2 includes a warning set mode and a warning release mode as the monitoring mode. The vigilance set mode is selected and set when the user leaves the room or building where the monitoring area is set and is unattended. In the warning set mode, an intruder is automatically detected based on the output of the intrusion sensor 12. That is, the alert set mode is an unattended monitoring mode in which a monitoring target event is detected in a state where the monitoring area is unattended.

  On the other hand, the warning cancellation mode is selected and set in a state where a user can exist in the monitoring area. In the alert release mode, the intrusion sensor 12 is stopped or the intrusion detection signal is invalidated, and an abnormal state is detected based on the notification from the emergency controller 14. That is, the alert release mode is a manned monitoring mode in which a monitoring target event is detected in a state where the monitoring area is manned.

  FIG. 2 is a schematic flowchart for explaining the operation of the monitoring main apparatus 16 in the alert set mode. While the intruder is not detected in the monitoring area, the control unit 20 monitors the output of the intrusion sensor 12 via the detection signal input unit 26 (S5), and from the monitoring camera 10 via the image signal input unit 24. The process (S10) for monitoring the presence or absence of the input image signal is continued. For example, if the intrusion detection signal issued by the intrusion sensor 12 is not received (in the case of “No” in S5), the control unit 20 determines whether an image of the next frame is input from the monitoring camera 10 (S10). ). When the image signal of the next frame has not been obtained from the monitoring camera 10 (in the case of “No” in S10), the process returns to S5. In this manner, the control unit 20 repeats the loop including the processes S5 and S10 and waits for the reception of the intrusion detection signal (in the case of “Yes” in S5) and the input of the next image (in the case of “Yes” in S10). .

  When the image signal of the next frame is obtained from the monitoring camera 10 (in the case of “Yes” in S10), the image signal is stored in the storage unit 22 (S15). After the image is stored, the process returns to step S5.

  The storage unit 22 has an area for storing an image of 100 frames as described above. FIG. 3 is a schematic diagram for explaining how to record in the storage unit 22 in the warning set mode. This figure shows the correspondence between the storage frame number “n” (n is a natural number from 1 to 100) for identifying the area and the shooting time T of the image stored in the area. An example of a state in which image recording is stopped due to intrusion detection is shown. The control unit 20 assigns storage areas to the new image in the order of the storage frame numbers. After the storage frame number has gone through, the image stored in the storage unit 22 is updated by the FIFO method. That is, using the storage frame number n, the storage area of 100 frames is used in the ring buffer method, and the storage area in which the image with the oldest shooting time is stored is sequentially overwritten and stored with the latest image, and the latest 100 frames are always stored. Accumulate minutes of images. For example, when the immediately preceding image is stored in the area of the storage frame number n = k, the area to be stored next is assigned the area of n = k + 1, and the latest image is stored in the area of n = 100. The area assigned to the next image returns to the area of n = 1.

  In FIG. 3, the time T is represented by the number of frames of the image captured by the monitoring camera 10, and indicates that a storage area is allocated every time the time T increases by one. That is, in the alert set mode, each frame taken by the surveillance camera 10 is sequentially stored in the storage unit 22.

  When the intrusion detection signal is received (in the case of “Yes” in S5), the control unit 20 reports the intrusion abnormality to the monitoring center 6 via the reporting unit 30 (S20). Also, a predetermined number of images are recorded after receiving the intrusion detection signal (S25 to S35). For example, the control unit 20 records an image of 20 frames in the storage unit 22 after reporting the abnormality. Specifically, the control unit 20 monitors whether an image of the next frame is input from the monitoring camera 10 (S25), and if input, records the image in the storage unit 22 (S30). This image input monitoring (S25) and image recording (S30) are repeated until an image of 20 frames is recorded after the intrusion is detected ("No" in S35). When 20 frames are recorded, the image is recorded in the storage unit 22. The operation is stopped (S40), and images before and after the abnormality detection are held in the storage unit 22. Incidentally, FIG. 3 shows a state in which the intrusion is detected and the image recording is stopped after the image is recorded at time T = t. As shown in the figure, in the alert set mode, 80 frames of images from T = t-79 to T = t are recorded in the storage unit 22 as images before intrusion detection, and T = Each image of 20 frames from t + 1 to T = t + 20 is recorded in the storage unit 22. That is, the recording period in the storage unit 22 in the warning set mode is 20 seconds in total of 16 seconds before detection and 4 seconds after detection, and an image photographed in this 20 seconds is recorded in the storage unit 22 at 5 fps.

  Upon receiving the abnormality report (S20) from the monitoring camera device 2, the monitoring person in the monitoring center 6 requests the monitoring camera device 2 to transmit the image held in the storage unit 22, and transmits the transmitted monitoring. It is possible to grasp and deal with the situation immediately before and immediately after the intrusion is detected from the recorded image of the area.

  Next, another alert release mode, which is a monitoring mode, will be described. FIG. 4 is a schematic flowchart for explaining the operation of the monitoring main apparatus 16 in the alert cancellation mode. In FIG. 4, the same processes as those in the alert set mode shown in FIG. 2 are denoted by the same reference numerals, and hereinafter, differences from the alert set mode will be mainly described. In the alert release mode, the control unit 20 monitors the reception of the emergency detection signal issued from the emergency controller 14 instead of the process of monitoring the reception of the intrusion detection signal from the intrusion sensor 12 (S5) (S50). ). While the notification from the emergency controller 14 is not received, image input monitoring (S10) and image recording (S15) are performed. Here, in the warning cancellation mode, the images taken by the monitoring camera 10 are thinned out (the frame rate is lowered) and recorded in the storage unit 22. For example, the control unit 20 records one frame image in the storage unit 22 every five frames. Specifically, every time an image of the next frame is input to the image signal input unit 24 (in the case of “Yes” in S10), the control unit 20 counts up the number of frames of the input image after the previous recording. Then, it is determined whether or not the current input image is an image of the fifth frame after the previous recording (S55). If it is less than 5 frames (in the case of “No” in S55), the control unit 20 returns to the processing S50 without recording the image in the storage unit 22. On the other hand, if it is the fifth frame (“No” in S55), the image is stored in the storage unit 22 (S15).

  When the emergency detection signal is received (in the case of “Yes” in S50), the control unit 20 issues an emergency report to the monitoring center 6 via the communication unit 30 (S60). The same thinning-out process (S65) is performed in a predetermined number of image recording processes (S25 to S35) after receiving the emergency detection signal. Specifically, every time an image of the next frame is input (in the case of “Yes” in S25), the control unit 20 counts up the number of frames of the input image after the previous recording, and the current input image It is determined whether or not the image is the fifth frame after the previous recording (S65). If it is less than 5 frames (in the case of “No” in S65), the control unit 20 returns to the processing S25 without recording the image in the storage unit 22. On the other hand, if it is the fifth frame (“Yes” in S65), the image is stored in the storage unit 22 (S30). After receiving the emergency detection signal, when the 20-frame image is recorded, the control unit 20 stops recording the image in the storage unit 22 (S40), and causes the storage unit 22 to hold the images before and after the abnormality detection.

  FIG. 5 is a schematic diagram for explaining a method of recording in the storage unit 22 in the alert release mode. In the alert release mode, as in the alert set mode, a storage area for 100 frames provided in the storage unit 22 is used in a ring buffer method. FIG. 5 shows a correspondence relationship between the storage frame number “n” (n is a natural number of 1 to 100) and the photographing time T of the image stored in the area, and an emergency is detected at a certain time. Accordingly, an example of a state in which image recording is stopped is shown. As described above, in the warning release mode, a thinning process is performed to record one frame every five frames. Therefore, if the shooting time of the recorded image immediately before the emergency detection is t, T = t as the image before the emergency detection. An image of 80 frames selected every 5 frames from a captured image of −395 to T = t is recorded in the storage unit 22, and an image after emergency detection is selected every 5 frames from T = t + 5 to T = t + 100. An image of 20 frames is recorded in the storage unit 22. That is, the recording period in the storage unit 22 in the alert release mode is 100 seconds in total of 80 seconds before the detection and 20 seconds after the detection, and an image photographed in the 100 seconds is recorded in the storage unit 22 at 1 fps.

  Upon receiving an abnormality report (S60) from the monitoring camera device 2, the monitoring staff at the monitoring center 6 requests the monitoring camera device 2 to transmit the image held in the storage unit 22, and transmits the monitored information. It is possible to grasp and deal with the situation where the user has made an emergency operation from the recorded image of the area.

  The operation of the control unit 20 in the alert set mode and the alert release mode has been described above. Since the alert set mode is an automatic monitoring mode in which an intruder is automatically detected and notified by the intrusion sensor 12, a response period from the occurrence of the monitoring target event to the notification is scheduled to be short. . That is, the event that caused the detection of the intrusion sensor 12 is reflected in an image immediately before the abnormality detection, so the recording period in the storage unit 22 may be short. Since the recording period is short, the data amount per unit time of the image recorded in the storage unit 22 can be increased. In the present embodiment, an image recording method for recording an image of each frame captured by the monitoring camera 10 in a recording period including a reaction time (scheduled response period) of the intrusion sensor 12 in the alert set mode is employed. That is, a high frame rate moving image is recorded in the storage unit 22, and the intruder's actions and the like are recorded in detail.

  On the other hand, the alert release mode is a manual monitoring mode in which the user recognizes the abnormal state and operates the emergency controller 14, and thus basically has a longer response period than the alert set mode. That is, the time until the user recognizes the abnormal state and the time after the recognition until the emergency operation device 14 is operated become longer, and the emergency operation device 14 becomes the monitoring main device 16 after the monitoring target event occurs. It is assumed that it may take some time to issue a report. Therefore, if an image is started to be recorded immediately before the detection signal is issued as in the warning set mode, the abnormal state cannot be sufficiently recorded, and the monitor can grasp the situation based on the recorded image. Can be difficult. Thus, in the alert release mode, it is necessary to schedule a relatively long period as the response period, and the image recording period is set so as to include the scheduled response period. Therefore, an image recording method is adopted in which the data amount per unit time of the image recorded in the storage unit 22 is reduced to extend the recording period. In the present embodiment, in the warning release mode, the recording period is extended to five times that of the warning set mode by the above-described thinning process, and images from 80 seconds before the emergency detection signal is issued are stored in the storage unit 22. By extending the recording period, it is possible to observe the abnormal state from the beginning by reproducing the recorded image, and the supervisor can easily grasp the situation.

  Note that the change control of the data amount per unit time of the image recorded in the storage unit 22 is performed by the color depth (bpp: bit per pixel) according to the resolution (dpi: dot per inch) of the image and the number of bits per pixel. ) Etc. to adjust the data amount of the image per frame. In this case, as the resolution and color depth are lowered, the image storage area per frame is reduced and the number thereof is increased. For example, when the recording period is increased five times as in the warning cancellation mode of the above-described embodiment, the control unit 20 performs processing such as resolution conversion on the image obtained from the monitoring camera 10 to 1 While the data capacity of the frame is reduced to 1/5, one storage area in the alert set mode is divided into five storage areas to set a total of 500 storage areas.

  As described above, the method of adjusting the data capacity of one frame to lengthen the recording period can maintain the frame rate of the image recorded in the storage unit 22 in the same manner as when the recording period is short. It is suitable for monitoring an abnormal state that changes quickly.

  Note that it is also possible to adjust the recording interval and the image quality of an image in accordance with the monitored event by using a change in frame rate and resolution / color depth together.

  In the above-described embodiment, the intrusion sensor 12 and the emergency operation device 14 are shown as the reporting means. However, the present invention can be applied to devices other than these. For example, even in the case of automatic detection using a sensor, the response period from event occurrence to detection / reporting may differ depending on the type of monitoring target event and the detection method. Even for such a difference in the response period of automatic monitoring, it is possible to change the image recording method and obtain the image recording time and image quality necessary for confirming the monitored event by the reproduced image.

  In the above-described embodiment, the surveillance camera system having two surveillance modes of the alert set mode and the alert release mode has been described. However, when the surveillance area is in a manned state, only the emergency controller 14 and some intrusion sensors 12 are emitted. A partial warning set mode in which the information is valid may be provided. In this case, since there is a possibility that an emergency operation by the user is performed in the partial alert set mode, the recording period may be the same as that in the alert release mode.

  In addition, in the alert set mode set when there is no driver, the emergency controller 14 is not generally operated, but the alert (emergency detection signal) generated by the emergency controller 14 may not be invalidated.

  In the above-described embodiment, the monitoring camera 10 captures an image every 0.2 seconds and transmits an image signal to the monitoring main device 16. However, the monitoring camera 10 receives a video signal (for example, an NTSC signal). ), And the monitoring main device 16 may cut out and record the image at a desired timing. In this case, the control unit 20 of the monitoring main device 16 generates an image from the video signal every 0.2 seconds during the warning set mode, records an image of 5 frames per second in the storage unit 22, and during the warning release mode. An image is generated every second and an image of one frame per second is recorded. That is, in steps S10 and S25 in the flow of FIG. 2, it is determined whether or not it is the next image recording timing (whether or not 0.2 seconds after the previous recording). In FIG. 4, in steps S55 and S65, it is determined whether or not it is the next image recording timing (whether it is one second after the previous recording).

  2 Surveillance camera device, 4 Public communication network, 6 Surveillance center, 10 Surveillance camera, 12 Intrusion sensor, 14 Emergency operation device, 16 Surveillance main device, 20 Control unit, 22 Storage unit, 24 Image signal input unit, 26 Detection signal input Section, 28 mode setting section, 30 reporting section.

Claims (6)

An image acquisition unit that acquires an image of the monitoring area captured at a predetermined period;
At least two types of reporting units for reporting the occurrence of monitored events detected by different methods in the monitoring area;
One of the first monitoring mode for enabling the reporting by the first type of reporting unit and the second monitoring mode for enabling the reporting by the second type of reporting unit are selectively set. A mode setting section;
A storage unit for storing the images in a predetermined data capacity,
Adjusted in accordance with the data amount per unit time of the acquired image on the set monitoring mode, performs the updating process the old image stored in the storage unit in the image after the adjusting to sequential overwrite recording A control unit that receives the notification from the notification unit and stops the update process and holds an image in a predetermined recording period including before the notification in the storage unit ;
Have
The controller is
Before Stories second while setting the monitor mode shall be the long term the recording period the data amount smaller adjusted to per unit time than in the configuration of the first monitoring mode,
A surveillance camera device characterized by the above. The surveillance camera device according to claim 1,
It said monitor mode said recording period corresponding to encompass scheduled response period from when the monitored events each of which occurs until the alarm unit of the first type of alarm unit or the second type is alarm A surveillance camera device characterized by that. In the surveillance camera device according to claim 1 or 2,
The first type of reporting unit is an automatic reporting unit having a sensor that automatically detects and reports the monitored event,
The second type of reporting unit is a manual reporting unit that has an operating device that is operated by a person who has recognized the monitoring target event and reports.
The control unit sets the recording period when the second monitoring mode for enabling notification by the manual notification unit is set, and the first for enabling notification by the automatic notification unit. Longer than the recording period when the monitoring mode is set,
A surveillance camera device characterized by the above. The surveillance camera device according to claim 3,
The control unit stores the data amount per unit time of an image to be recorded in the storage unit when the second monitoring mode is set, and the storage unit when the first monitoring mode is set. A surveillance camera device characterized in that the amount of data recorded per unit time is smaller than the amount of data per unit time. The surveillance camera device according to claim 4,
The monitoring camera device, wherein the control unit changes a data amount per unit time of the image by adjusting a frame rate or image quality of the image recorded in the storage unit. An image acquisition unit that acquires an image of the monitoring area captured at a predetermined period;
A reporting unit that reports the occurrence of a monitored event in the monitoring area;
A mode setting unit that selectively sets either an unattended monitoring mode set when the monitoring area is unmanned or a manned monitoring mode set when the monitoring area is in a manned state;
A storage unit for storing the image within a predetermined data capacity;
Adjusted in accordance with the data amount per unit time of the acquired image on the set monitoring mode, performs the updating process the old image stored in the storage unit in the image after the adjusting to sequential overwrite recording A control unit that receives the notification from the notification unit and stops the update process and holds an image in a predetermined recording period including before the notification in the storage unit ;
Have
The controller is
Wherein during configuration manned monitoring mode, be a long period of time adjusting the recording period is small the amount of data per unit time than in the configuration of the unmanned monitoring mode,
A surveillance camera device characterized by the above.

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