JP2005123796A - Surveillance image recording apparatus, surveillance image recording method, and program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitor image recording apparatus that can simply be installed and protect privacy of a photographed person. <P>SOLUTION: The monitor image recording apparatus 100 includes: a monitor camera 10; a hard disk pack 400 for recording an image imaged by the monitor camera 10; a housing 300 having a freely openable/closable cover 302 for accommodating the monitor camera 10 and the hard disk pack 400; and a lock part 310 for locking the cover 302 when the cover 302 is closed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a monitoring image recording apparatus, a monitoring image recording method, and a program thereof. In particular, the present invention relates to a monitoring image recording apparatus incorporating a hard disk unit for recording a monitoring image, a monitoring image recording method, and a program thereof.

  Conventionally, in order to ensure security, a surveillance camera system that captures and records an image of a surveillance area is used. The surveillance camera system includes a surveillance camera that captures an image, a monitor that displays an image captured by the surveillance camera, and a recording medium such as a tape that records an image captured by the surveillance camera. The monitor and the recording medium are generally installed at a place different from the normal monitoring camera. Then, the administrator of the monitoring camera system determines whether an abnormality has occurred by reproducing the monitoring image shown on the monitor or the image stored on the recording medium. In addition, since the document number etc. which show the said prior art are not grasped | ascertained at the time of application, the description is abbreviate | omitted.

  However, the conventional surveillance camera system has a problem that it may infringe on the privacy of people entering and exiting the surveillance area. For example, a monitoring image by a surveillance camera installed for the purpose of preventing theft in the changing room may be displayed on a monitor installed in a different place from the monitoring camera, contrary to the intention of the person using the changing room, There has been a problem of recording on a recording medium.

  Furthermore, the conventional surveillance camera system is not suitable for temporary use such as monitoring of a construction site because it takes time to install a surveillance camera, a monitor, and a recording medium and to connect them. was there.

  Therefore, an object of the present invention is to provide a monitoring image recording apparatus, a monitoring image recording method, and a program for solving the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  According to the first aspect of the present invention, a surveillance camera, a hard disk unit that records an image captured by the surveillance camera, a housing having an openable and closable opening that houses the surveillance camera and the hard disk unit, and an open / close There is provided a monitoring image recording apparatus including a lock unit that locks the opening / closing unit in a state where the unit is closed.

  You may further provide the holding | maintenance part which hold | maintains the direction with respect to the housing | casing of a surveillance camera so that change is possible. A battery that is fixed to the housing and drives the surveillance camera and the hard disk unit may be further provided.

  You may further provide a non-volatile memory and the system control part which stores regularly the recording area information which shows the area | region where the image was stored in a hard-disk unit in a non-volatile memory.

  The hard disk unit further includes a hard disk controller that writes an image to the hard disk unit and periodically outputs the recording area information to the system controller. The system controller sequentially stores the recording area information received from the hard disk controller in the nonvolatile memory. May be.

  The system control unit further includes a recording stop button for instructing to stop recording to the hard disk unit, and the system control unit stops recording an image to the hard disk unit when the recording stop button is operated, and is stored in the nonvolatile memory. Existing recording area information may be written to the hard disk unit.

  The order to be recorded in each sector of the hard disk unit is determined in advance, and the system control unit may periodically store the last sector in which the image is written in the nonvolatile memory as the recording area information.

  The predetermined recording order may follow the order of physically continuous tracks in the hard disk unit.

  The system control unit may read the last sector stored in the hard disk unit when starting the apparatus, and start recording an image from the sector next to the read last sector.

  When the system control unit determines that the last sector that has not yet been written to the hard disk unit is stored in the non-volatile memory when the device is started, the system control unit writes the last sector to the hard disk unit, and then Image recording may be started from the next sector.

  According to the second aspect of the present invention, a monitoring image recording method using a device including a monitoring camera, a hard disk unit that records an image captured by the monitoring camera, and a nonvolatile memory stores the image in the hard disk unit. The recording area information indicating the recorded area is periodically stored in the nonvolatile memory.

  A program for a surveillance image recording apparatus comprising a surveillance camera, a hard disk unit for recording an image captured by the surveillance camera, and a non-volatile memory, periodically records recording area information indicating an area where an image is stored in the hard disk unit. A control function for storing in a non-volatile memory is provided.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  According to the present invention, the surveillance camera and the hard disk unit for recording the surveillance image are built in the lockable casing, thereby protecting the privacy of the person entering and exiting the surveillance area and easily installing the surveillance image. A recording apparatus can be provided. Also, by periodically managing the recording area of the monitoring image in the hard disk unit, the monitoring image can be recorded seamlessly.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  1 and 2 show the appearance of a monitoring image recording apparatus 100 according to an embodiment of the present invention. FIG. 1 shows a state where the housing of the monitoring image recording apparatus 100 is closed, and FIG. 2 shows a state where the housing is opened. The monitoring image recording apparatus 100 includes a monitoring camera 10 that captures an image of a monitoring area, a hard disk pack 400 that records an image captured by the monitoring camera 10, and a built-in microphone 22 that acquires ambient sound by converting it into an audio signal. And an openable / closable housing 300 for housing the monitoring camera 10 and the hard disk pack 400, and a lock portion 310 for locking the housing 300 in a state in which the housing 300 is closed. In the housing 300, a microphone hole 316 is provided at a position facing the built-in microphone 22. Here, the hard disk pack 400 is an example of the hard disk unit of the present invention.

  The housing 300 includes a case 304 and a cover 302 that are rotatably connected by a hinge 306, and the lock unit 310 locks the cover 302 in a state where the cover 302 is closed with respect to the case 304. The lock unit 310 is unlocked and locked using the key 600. When the monitoring image recording apparatus 100 records the monitoring image on the hard disk pack 400 in a state where the lock unit 310 is locked, the hard disk pack 400 on which the monitoring image is recorded may be illegally taken out by a third party. Is prevented. The cover 302 is an example of the opening / closing part of the present invention.

  The monitoring image recording apparatus 100 further includes a base plate 314 for fixing the casing 300 to the installation surface, and a magnet 318 (FIG. 1) that is provided on the installation surface side of the base plate 314 and fixes the base plate 314 to the ground surface by magnetic force. Is provided. If the installation surface is a ferromagnetic material such as iron, the monitoring image recording apparatus 100 can be easily installed by the magnetic force of the magnet 318.

  Furthermore, the surveillance image recording apparatus 100 includes a ball joint 308 that can freely adjust the orientation of the surveillance camera 10 with respect to the housing 300 after the surveillance camera 10 is fixed to the housing 300. Thereby, after installing the monitoring image recording apparatus 100 on the installation surface, the direction of the monitoring camera 10 can be easily adjusted. The ball joint 308 is an example of the holding portion of the present invention.

  Further, the monitoring image recording apparatus 100 converts the audio signal acquired by the built-in microphone 22 into a digital signal of IEEE 1394 (DV), and the audio signal output from the microphone amplifier 24 and the video signal output from the monitoring camera 10 as digital signals. A media converter 40 for conversion and a hard disk recorder 200 for recording a digital signal output from the media converter 40 on the hard disk pack 400 are provided. The hard disk recorder 200 and the hard disk pack 400 are connected by a detachable connector suitable for exchanging bit strings for hard disk writing.

  The hard disk recorder 200 includes an operation unit 206 that performs an operation of starting or stopping recording of a monitoring image on the hard disk pack 400. The operation unit 206 can be operated only when the lock unit 310 is unlocked and the cover 302 is opened. Thereby, it is possible to prevent a person other than the administrator who has the key 600 from starting or stopping the recording of the monitoring image recording apparatus 100.

  The monitoring image recording apparatus 100 further includes an RTC & OSD 18 that combines and displays a real-time clock indicating the current time on the monitoring image. The surveillance camera 10, the RTC & OSD 18, the media converter 40, the built-in microphone 22, the microphone amplifier 24, the media converter 40, and the media converter 40 and the hard disk recorder 200 are connected by a cable 320 having specifications suitable for the type of data to be exchanged.

  The monitoring camera 10 can be replaced according to the purpose of monitoring. For example, night monitoring can be performed by using an infrared camera. Further, by using an infrared remote controller or a dome camera capable of remotely controlling the angle and angle of view by wireless, the monitoring range can be freely changed after installation. Alternatively, the monitoring camera 10 may be detached from the housing 300 with the cable 320 connected and installed at a position away from the housing 300. In this case, the administrator can easily start and stop recording the monitoring image by operating the operation unit 206 at a position away from the monitoring camera 10. Further, by placing the hard disk pack 400 on the administrator's hand, the security of the recorded monitoring image is improved.

  The monitoring image recording apparatus 100 further includes a power supply unit 50 that supplies power obtained from an external power source such as a commercial power source to each unit of the monitoring image recording apparatus 100, and each unit of the monitoring image recording apparatus 100 when no external power is supplied. A battery to be driven. For example, the battery is fixed between the case 304 and the base plate 314 using a fixing means such as a screw. When external power is supplied, the monitoring image recording apparatus 100 operates even when the battery is removed. The capacity of the battery is desirably a capacity for operating the monitoring image recording apparatus 100 for a time equal to or longer than the recordable time of the hard disk pack 400, for example. By providing a battery, the monitoring image recording apparatus 100 can record a monitoring image even in a situation where external power is not supplied, such as during a power failure or when used outdoors.

  The monitoring image recording apparatus 100 further includes an output terminal (not shown) that outputs a monitoring image. By connecting an external monitor to the output terminal, an image currently captured by the monitoring camera 10 can be confirmed on the external monitor. In addition, the hard disk recorder 200 reads out the monitoring image recorded in the hard disk pack 400 and outputs it to an image processing device such as a notebook personal computer via the output terminal, thereby editing the recorded image with the image processing device, Can be taken out.

  With the configuration described above, the monitoring image recording apparatus 100 can easily record a monitoring image without performing troublesome installation and connection work unlike the conventional monitoring system. In addition, since the monitoring image is recorded in the hard disk pack 400 housed in the lockable casing 300, the privacy of the person shown in the image is protected.

  FIG. 3 is a block diagram illustrating an example of a hardware configuration of the monitoring image recording apparatus 100. The monitoring camera 10 and the built-in microphone unit 20 are connected to the hard disk recorder 200 via the media converter 40, and the hard disk recorder 200 is detachably connected to the hard disk pack 400. The media converter 40 acquires a video signal and an audio signal from the monitoring camera 10 and the built-in microphone unit 20, respectively, converts them into IEEE 1394 (DV) digital signals, and outputs them to the hard disk recorder 200. The hard disk recorder 200 writes the digital data acquired from the media converter 40 into the hard disk pack 400 according to a control method described later.

  The hard disk pack 400 includes a disk that is a recording medium, a head that reads / writes data from / to the disk, and an actuator that moves the head on the disk. The disk is divided into concentric tracks, and each track is divided into sectors. A sector is a minimum unit that can be addressed on a disk drive, and is a place where data is stored.

  The hard disk recorder 200 includes an IEEE 1394 interface 202 that converts an IEEE 1394 serial signal acquired from the media converter 40 into a bit string for writing to the hard disk, and a hard disk control that acquires a bit string for writing to the hard disk from the IEEE 1394 interface 202 and writes the bit string to the hard disk pack 400. Circuit 204. The hard disk control circuit 204 controls the actuator of the hard disk pack 400 to move the head to a target track on the disk and write data in the target sector.

  The hard disk recorder 200 further includes a CPU 208 that performs overall control of the operation of each unit of the hard disk recorder 200, an EEPROM 210 connected to the CPU 208, and an operation unit 206 that accepts user operations and notifies the CPU 208. The CPU 208 is an example of a system control unit of the present invention. The EEPROM 210 is an example of a nonvolatile memory according to the present invention, and uses, for example, a flash memory. The operation unit 206 is an example of a recording stop operation unit of the present invention.

  The interface of each part is an IEEE 1394 interface between the media converter 40 and the IEEE 1394 interface 202, a connection of the IEEE 1394 interface 202 and the hard disk control circuit 204 to the CPU 208 is a CPU bus, an operation panel interface between the operation unit 206 and the CPU 208, and an interface between the CPU 208 and the EEPROM 210. The space between them is the EEPROM interface. The IEEE 1394 interface 202 and the hard disk control circuit 204 are further connected by a control line, and the hard disk pack 400 is connected to the hard disk control circuit 204 by an HD pack interface.

  The order in which data is to be recorded in each sector of the hard disk pack 400 is determined in advance. For example, it follows the order of physically consecutive tracks on the disc. The hard disk control circuit 204 writes image and audio digital data to the hard disk pack 400 according to a predetermined order, and periodically outputs the last sector in which the image has been written to the CPU 208. The CPU 208 sequentially writes the acquired last sector in the EEPROM 210. The cycle in which the CPU 208 writes the last sector to the EEPROM 210 is, for example, once per frame of the monitoring image, that is, 30 to 50 msec. Degree.

  Thereby, even if the hard disk recorder 200 is unexpectedly powered off, the CPU 208 can know the position where the recording should be resumed by reading the last sector from the EEPROM 210. As a result, when the recording is resumed after an unexpected power interruption, the monitoring image recording apparatus 100 is prevented from overwriting the monitoring image recorded immediately before the power interruption. That is, even when an unexpected power failure occurs, the monitoring image recorded in the hard disk pack 400 is properly maintained.

  Once the monitoring image recording apparatus 100 starts recording an image, the monitoring image recording apparatus 100 continues to record the monitoring image continuously until the recording stop button is pressed or power is not supplied to the power supply unit 50. When an image is recorded in accordance with a predetermined recording order and the image is recorded up to the last recordable sector, the monitoring image recording apparatus 100 returns to the first sector and overwrites the past image with the current image. Record. Therefore, after the monitoring image is recorded exceeding the maximum recording time of the hard disk pack 400, if the recording stop button is pressed, the monitoring images for the maximum recording time of the hard disk pack 400 are confirmed retroactively from the position where the recording was stopped. be able to.

  The operation unit 206 has at least a recording start button and a recording stop button. When the recording stop button of the operation unit 206 is operated, the CPU 208 stops recording of an image on the hard disk pack 400 by the hard disk control circuit 204 and writes the last sector stored in the EEPROM 210 to the hard disk pack 400. When the recording start button is operated, the last sector stored in the hard disk pack 400 is read, and image recording is started from the sector next to the read last sector.

  As described above, the CPU 208 records the last sector on the hard disk pack 400 itself when the recording is stopped. Therefore, even when the hard disk pack 400 is replaced, image recording can be resumed from an appropriate sector. When the CPU 208 starts recording the monitoring image on the hard disk pack 400, the CPU 208 writes the start sector that has started recording to the hard disk pack 400. Therefore, the CPU 208 can determine the area where the image is stored by reading the start sector and the last sector of the hard disk pack 400. The start sector and the last sector are an example of the recording area information of the present invention.

  The recording medium 500 stores a program that causes the hard disk recorder 200 to realize the functions of the hard disk control circuit 204 and the CPU 208. As the recording medium 500, a CD-ROM, an optical recording medium such as a flexible disk, a DVD and a PD, a magneto-optical recording medium such as an MD, a tape medium, a semiconductor memory such as an IC card, and the like can be used. Further, a storage device such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium, and the program may be provided to the hard disk recorder 200 via the network.

  According to the above configuration, the monitoring image recording device 100 records the monitoring image data in the hard disk pack 400 periodically, thereby seamlessly recording the monitoring image data, and when the hard disk pack 400 is replaced. In addition, recording can be resumed from an appropriate position.

FIG. 4 is a flowchart showing an example of the operation of the hard disk recorder 200. In this flow, the hard disk recorder 200 records a new monitoring image on the hard disk pack 400 after the power is turned on. In the description, the block diagram of FIG. 3 is also referred to.
First, when the power of the hard disk recorder 200 is turned on (S100), the CPU 208 reads the “write flag” from the EEPROM 210 (S102). The “write flag” is a flag indicating whether or not the CPU 208 has written the latest last sector stored in the EEPROM 210 into the hard disk pack 400. When the “write flag” is 1, it indicates that writing has been completed, and when it is 0, it indicates that writing has not been completed. The fact that the writing of the “write flag” has not been completed at the time of turning on the power indicates that the hard disk recorder 200 has ended abnormally due to a power failure or battery exhaustion during the previous recording.

  The CPU 208 determines whether or not the read write flag is 1 (S104). When the write flag read from the EEPROM 210 is 0 (S104: No), the CPU 208 reads the last sector stored in the EEPROM 210 (S106), and writes the last sector to the hard disk pack 400 via the hard disk control circuit 204 (S108). ). At this stage, the last sector where the image is actually written in the hard disk pack 400 matches the last sector written as the recording area information. Thereby, the last part of the monitoring image recorded on the hard disk pack 400 is appropriately maintained. On the other hand, if it is determined in step 104 that the write flag is 1, the process proceeds to step 110.

  In step 110, the CPU 208 reads the last sector from the hard disk pack 400, and sets the next sector as a new recording start position (S110). When the recording start button of the operation unit 206 is pressed (S112: Yes), the hard disk control circuit 204 starts recording a new monitoring image (S114). The hard disk control circuit 204 outputs the last sector to the CPU 208 every time recording of a monitoring image for one frame is completed. The CPU 208 stores the last sector in the EEPROM 210 every time it acquires the last sector. That is, the CPU 208 is 30 to 50 msec. The last sector is written in the hard disk pack 400 at a cycle of about (S116).

  In parallel with the recording of the image on the hard disk pack 400, the CPU 208 determines whether or not the recording stop button has been pressed on the operation unit 206 (S118). If the recording stop button has not been pressed (S118: No), the process returns to step 116 to continue recording the image and writing the last sector. On the other hand, if it is determined that the recording stop button has been pressed (S118: Yes), the last sector stored in the EEPROM 210 is written into the hard disk pack 400 (S120). Thus, this flow ends.

  According to the above flow, the hard disk recorder 200 can appropriately manage the recording area of the monitoring image recorded in the hard disk pack 400 using the EEPROM 210 and the hard disk pack 400. As a result, even when an abnormal end occurs due to intermittent recording or power interruption, the monitoring image immediately before the end can be reliably maintained and the monitoring image can be recorded seamlessly.

  FIG. 5 is a block diagram illustrating another example of the hardware configuration of the monitoring image recording apparatus 100. In addition to the configuration described in FIG. 3, the monitoring image recording apparatus 100 according to the present embodiment includes a human body sensor 14, a recording control circuit 16, an RTC & OSD 18, an external microphone unit 30, a power supply unit 50, a battery 56, a DC jack 52, and an AC. An adapter 54 is further provided. The other configurations are the same as those described with reference to FIG.

  The human body sensor 14 detects the presence or absence of a human body in the monitoring range of the monitoring image recording apparatus 100. The recording control circuit 16 writes an index indicating the detection of the human body in the hard disk pack 400 when the human body sensor 14 detects the human body. Alternatively, the recording control circuit 16 causes the hard disk recorder 200 to record a monitoring image only while the human body sensor 14 is detecting a human body. The human body sensor 14 may be a door sensor that detects opening and closing of a door. In this case, the recording control circuit 16 may write an index on the image when the door is opened and closed. Alternatively, the monitoring image may be recorded for a certain period of time after the door is opened and closed, or the monitoring image may be recorded after the door is opened and closed until the door is opened and closed again. Thereby, when confirming the recorded image, it is possible to efficiently confirm the image by paying attention to the entrance and exit of the person.

  An interchangeable lens 12 is attached to the monitoring camera 10. The monitoring image recording apparatus 100 can obtain an appropriate monitoring image by exchanging a plurality of lenses 12 having different optical characteristics such as angle of view and magnification according to the application. The human body sensor 14, the recording control circuit 16, and the monitoring camera 10 can be replaced as an optional unit 60 according to usage conditions such as a monitoring place, a monitoring target, and a monitoring time. By using the option unit 60 having specifications suitable for the usage situation, it is possible to record a captured image and a monitoring image with the optimal shooting timing.

  The RTC & OSD 18 realizes an on-screen display function that generates a real-time clock indicating the shooting date and time and combines and displays the real-time clock on the monitoring image captured by the monitoring camera 10. With the function of the RTC & OSD 18, when the monitoring image recorded on the hard disk pack 400 is confirmed later, the shooting date and time of the monitoring image can be easily visually confirmed.

  The external microphone unit 30 receives an audio signal input from an external microphone installed in the monitoring area and outputs it to the media converter 40. The external microphone unit 30 includes an external microphone input unit 32 that inputs an audio signal of the external microphone, and a microphone amplifier 24 that amplifies the audio signal from the external microphone input unit 32.

  The AC adapter 54 converts AC power such as a commercial power source into DC power and supplies it to the monitoring image recording apparatus 100. The DC jack 52 obtains DC power from the AC adapter 54 by inserting the AC adapter 54 and supplies it to the power supply unit 50. The power supply unit 50 converts the supplied power into a voltage and a current that match the specifications of each unit of the monitoring image recording apparatus 100 and supplies the converted voltage and current. The monitoring image recording apparatus 100 further includes a recess 53 that surrounds the plug portion of the AC adapter 54 with a certain clearance in a state where the AC adapter 54 is inserted into the DC jack 52. Accordingly, when an external force is applied to the AC adapter 54, the depression 53 suppresses the deformation of the AC adapter 54 within a certain range. Therefore, mechanical damage to the AC adapter 54 and the DC jack 52 can be reduced.

  The battery 56 is detachably attached to the monitoring image recording apparatus 100. When the battery 56 is attached and external power is supplied from the AC adapter 54, the power supply unit 50 charges the battery 56. On the other hand, when the battery 56 is attached and no external power is supplied, the battery 56 supplies DC power to the power supply unit 50, thereby starting with the monitoring camera 10, the hard disk recorder 200, and the hard disk pack 400. Drive each part.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

1 is an external view of a monitoring image recording apparatus 100 according to an embodiment of the present invention. 2 is an external view showing an internal structure of a monitoring image recording apparatus 100. FIG. 3 is a block diagram illustrating an example of a hardware configuration of a monitoring image recording apparatus 100. FIG. 5 is a flowchart showing an example of the operation of the hard disk recorder 200. 3 is a block diagram illustrating another example of the hardware configuration of the monitoring image recording apparatus 100. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Surveillance camera 12 Lens 14 Human body sensor 16 Recording control circuit 18 RTC & OSD
20 Built-in microphone unit 22 Built-in microphones 24 and 34 Microphone amplifier 30 External microphone unit 32 External microphone input unit 40 Media converter 50 Power supply unit 52 DC jack 54 AC adapter 56 Battery 60 Optional unit 100 Monitoring image recording device 200 Hard disk recorder 202 IEEE 1394 interface 204 Hard disk control circuit 206 Operation unit 208 CPU
210 EEPROM
300 Housing 302 Cover 304 Case 306 Hinge 308 Ball joint 310 Lock portion 314 Base plate 316 Microphone hole 318 Magnet 320 Cable 400 Hard disk pack 500 Recording medium 600 Key

Claims (12)

A surveillance camera,
A hard disk unit for recording an image captured by the surveillance camera;
A housing having an openable and closable opening and closing portion for housing the surveillance camera and the hard disk unit;
A monitoring image recording apparatus comprising: a lock unit that locks the open / close unit in a state where the open / close unit is closed.   The monitoring image recording apparatus according to claim 1, further comprising a holding unit that holds a direction of the monitoring camera relative to the housing in a freely changeable manner.   The monitoring image recording apparatus according to claim 1, further comprising a battery that is fixed to the housing and drives the monitoring camera and the hard disk unit. Non-volatile memory;
The monitoring image recording apparatus according to claim 1, further comprising: a system control unit that periodically stores recording area information indicating an area where an image is stored in the hard disk unit in the nonvolatile memory. A hard disk control unit that writes an image to the hard disk unit and periodically outputs the recording area information to the system control unit;
The monitoring image recording apparatus according to claim 4, wherein the system control unit sequentially stores the recording area information received from the hard disk control unit in the nonvolatile memory. A recording stop button for instructing to stop recording to the hard disk unit;
The system control unit, when the recording stop button is operated, stops recording an image on the hard disk unit and writes the recording area information stored in the nonvolatile memory to the hard disk unit. The monitoring image recording apparatus according to claim 4.   The order to be recorded in each sector of the hard disk unit is predetermined, and the system control unit periodically stores the last sector in which an image is written as the recording area information in the nonvolatile memory. Item 5. The monitoring image recording apparatus according to Item 4.   The monitoring image recording apparatus according to claim 7, wherein the predetermined recording order is in accordance with an order of physically continuous tracks in the hard disk unit.   The monitoring image recording according to claim 7, wherein the system control unit reads the last sector stored in the hard disk unit when starting the apparatus, and starts recording an image from a sector next to the read last sector. apparatus.   When the system control unit determines that the last sector that has not yet been written to the hard disk unit is stored in the nonvolatile memory at the time of startup of the device, after writing the last sector to the hard disk unit, The monitoring image recording apparatus according to claim 9, wherein image recording is started from a sector next to the last sector. A monitoring image recording method using a monitoring camera, a hard disk unit that records an image captured by the monitoring camera, and a nonvolatile memory,
A monitoring image recording method for periodically storing recording area information indicating an area where an image is stored in the hard disk unit in the nonvolatile memory. A program for a surveillance image recording device comprising a surveillance camera, a hard disk unit for recording an image captured by the surveillance camera, and a nonvolatile memory,
A program having a control function for periodically storing, in the nonvolatile memory, recording area information indicating an area where an image is stored in the hard disk unit.

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