JP2007096671A - Vehicle-mounted monitor recorder and image data transfer method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle-mounted monitor recorder which requires no manual work such as exchange of recording media, and is capable of substantially recording a monitor image signal for a long time. <P>SOLUTION: A CPU 151 determines an operation state of the vehicle based on a signal input from a sensor I/F 141, selects image signals output from cameras 300a to 300c in a video I/F 110 after image compression, controls a recording reproduction control unit 121, and records in a recording medium 120. Moreover, when a radio LAN I/F 130 can be connected with a network through an antenna 200, image data recorded in the recording media 120 are transferred to an external recording device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle monitoring recorder for monitoring and recording the state of a vehicle, and in particular, for in-vehicle use capable of transferring an image recorded on a recording medium of an in-vehicle monitoring recorder to a recording device outside the vehicle. It relates to a surveillance recorder.

  In a conventional vehicle-mounted monitoring device, when the driver is not sitting in the driver's seat, the driver detection sensor detects that the driver is not sitting, and the imaging direction of the imaging camera is directed toward the vehicle interior, By connecting the output to the VTR, the recording of the VTR is turned on, the video signal (captured image signal) obtained by imaging the passenger compartment is recorded on the magnetic tape, the vehicle is stolen, and the vehicle is abandoned There is a thing which tries to be useful for investigation of a criminal (for example, patent documents 1).

JP-A-8-265611 (paragraphs 0029 to 0030, FIG. 2)

Conventional in-vehicle monitoring devices use a magnetic tape recording / reproducing device (hereinafter referred to as VTR) as a monitoring recorder, which requires manual work such as replacement of the magnetic tape. There was a risk of work mistakes such as loss of recorded images due to overwriting.
Also, after the vehicle was abandoned, it was impossible to find the criminal if the criminal took away the magnetic tape, even though he wanted to use it to find the criminal.

  In addition, when an in-vehicle monitoring recorder that employs a fixed recording medium such as a hard disk is used instead of a monitoring recorder that uses a removable recording medium such as a magnetic tape, the recording capacity of the fixed recording medium is limited. Therefore, a necessary recorded image may be lost due to overwriting.

  An object of the present invention is to provide a vehicle-mounted monitoring recorder that does not require manual work such as replacement of a recording medium and can record a monitoring image signal for a substantially long time.

  An in-vehicle monitoring recorder according to the present invention includes a monitoring image signal input processing means for digitally processing a monitoring image signal from an in-vehicle monitoring camera and outputting a digital image signal, the digital image signal and its image number for a recording medium, and Recording / reproduction control means for controlling recording and reproduction of auxiliary information, image management information storage means for storing image management information of the digital image signal recorded on the recording medium, the recording / reproduction control means via the network, and the outside of the vehicle Communication control means for controlling connection with the video storage device, control image signal input processing means, recording / playback control means, image management information storage means, and control means for controlling operations of the communication control means. And when the communication control means has successfully connected to the video storage device outside the vehicle via a network, The digital image signal and the image number and the additional information outputted from the means, characterized in that it has to forward the video storage device of the vehicle exterior.

The present invention is configured as described above, records a monitoring image signal from an in-vehicle monitoring camera on a recording medium, and transfers the recorded monitoring image signal to a video storage device outside the vehicle via a network. As a result, manual operation such as replacement of the recording medium is not necessary, and monitoring image signals can be recorded for a substantially long time.
In addition, since there is no need to replace the recording medium, there is no risk of the recorded image disappearing due to a work mistake during daily operation, or the recording medium being taken away by the criminal.

Embodiment 1 FIG.
FIG. 1 is a system configuration diagram illustrating an example of a usage pattern of the in-vehicle monitoring recorder according to the first embodiment of the present invention. In the figure, the monitoring recorder 100 is connected to an antenna 200 and a camera 300, and the monitoring recorder 100, the antenna 200, and the camera 300 are attached to a vehicle 400. The wireless LAN base station 500 is connected to the image storage server 600.

  If the vehicle 400 is within the effective range of the wireless LAN base station 500, the monitoring recorder 100 and the image storage server 600 can communicate with each other through the wireless LAN.

  FIG. 2 is a system configuration diagram showing an example of connection between an in-vehicle monitoring recorder and related equipment. In this example, three cameras, a front monitoring camera 300a, an in-vehicle monitoring camera 300b, and a rear monitoring camera 300c, are attached to the monitoring recorder 100 according to the purpose.

  A vehicle control microcomputer 401 and vehicle state detection sensors such as a side brake sensor 402, a door sensor 403, and a vibration sensor 404 for detecting the vehicle state are also connected to the monitoring recorder 100, and the monitoring recorder 100 detects the vehicle state. It can be detected. Note that the number and type of surveillance cameras and vehicle state detection sensors may differ depending on the scale and purpose of the vehicle.

  FIG. 3 is a block diagram illustrating a configuration example of the monitoring recorder. In the figure, a monitoring recorder 100 includes a video interface 110, a recording medium 120, a recording / playback control unit 121, a wireless LAN interface 130, a sensor input interface 141, a CAN (CAN: Car Area Network) interface 142, a timer 143, a CPU 151, a ROM 152, and a RAM 153. , EPROM 154 as a constituent element and connected to each other via a bus 155.

The video interface 110 is used to select a video signal output from the cameras 300a to 300c and obtain a digital image signal. The sensor input interface 141 is used to acquire signals from vehicle state detection sensors such as the side brake sensor 402 and the door sensor 403.
The CAN interface 142 is used to connect the monitoring recorder 100 to the in-vehicle network CAN, but is also used to connect the camera 300, the vehicle control microcomputer 401, the side brake sensor 402, the door sensor 403, the vibration sensor 404, and the like. Can do.

  The CPU 151 controls the monitoring recorder 100, operates according to the control program stored in the ROM 152, and uses the RAM 153 as a work area. It should be noted that setting of vehicle monitoring conditions defining the operation of the control program, identification information of the monitoring recorder 100, search information for searching connection destinations such as the host name and address of the image storage server 600, and mutual authentication with the connection partner Authentication information relating to the individual of the monitoring recorder 100 such as a certificate for doing so is stored in the EPROM 154. In many cases, flash memories are used as the ROM 152 and the EPROM 154.

  The video interface 110 includes a video switch 111 that selects any one of image signals output from the cameras 300a to 300c, an A / D converter 112 that converts the image signal selected by the video switch 111 into a digital image signal, The digital image signal is configured by an image compression unit 113 that performs data compression for efficiently performing data transmission or digital recording, and the video switch 111, the A / D converter 112, and the image compression unit 113 are respectively provided. It is controlled by the CPU 151 via the bus 155.

  The image signals output from the cameras 300a to 300c have been described as being captured by the monitoring recorder 100 via the video interface 110. However, video data digitally compressed by the cameras 300a to 300c is transmitted to the CAN interface 142. (Not shown) may be taken in.

  FIG. 4 is a system configuration diagram for explaining the operation of the in-vehicle monitoring recorder when handling a plurality of vehicles in a parking lot. In the figure, the parking lot 700 has a parking area where the vehicle 400 is parked, and the wireless LAN base station 500 is installed so that the parking area is within a communication area (not shown). An image storage server 600 is placed in the management room 800, and is connected to the wireless LAN base stations 500 a to 500 c installed in the parking lot 700 via the LAN 510. In addition, an operation terminal 610, a DVD recorder 620, and a mass storage device 630 are connected to the image storage server 600.

  The basic operations of the monitoring recorder 100 include standby, recording operation, and transfer operation, and these operations may be performed simultaneously. Hereinafter, each operation will be described.

  In the standby state, the monitoring recorder 100 is powered on, but neither recording operation nor transfer operation is performed. In this state, the CPU 151 monitors the state of the vehicle by monitoring the state of the timer 143, the sensor input interface 141, the video interface 110, the wireless LAN interface 130, etc. via the bus 155 in accordance with the setting contents of the monitoring program and the monitoring conditions. However, when there is a change in the state of the vehicle, a recording operation, a transfer operation, and the like are executed according to the setting.

  For example, when the side brake sensor 404 connected to the sensor input interface 141 detects that the side brake is released, the recording operation is executed, or the wireless LAN interface 130 causes the monitoring recorder 100 to operate the base station 500. For example, when it is detected that communication is possible, a transfer operation is performed.

  Next, the recording operation will be described. Based on the control program and the vehicle monitoring conditions set in advance, the monitoring recorder 100 selects the cameras 300a to 300c, sets data compression conditions, and sets continuous recording / intermittent recording, and records a monitoring image.

  An example of the recorded image management table of the monitoring recorder 100 is shown in FIG. FIG. 5A is an image table in which image number, incidental information such as date and time and sensor state, and image data are recorded. FIG. 5B is an image management information table. Image management information such as the last recording time, the last transfer time, the recorded image number, and the untransferred image number is recorded on the recording medium 120 in accordance with the recording of the image data. Updated.

  As described above, since the image data is recorded on the recording medium 120 together with the image number, the auxiliary information, and the image management information, the image data can be searched and retrieved based on these information.

  When the image data recorded on the recording medium 120 is transferred to the image storage server 600 and correctly recorded, an image data transfer success notification signal is displayed. The data is returned via the station 500 and the antenna 200, and the data transfer completion process or the retransmission process is performed by the wireless LAN interface 130 and the CPU 151.

When the image data transfer success notification signal is received, it is possible to determine an image number that has no problem even if the transfer to the image storage server 600 is completed and deleted. Therefore, the surveillance recorder 100 automatically determines whether the unnecessary image is erased or overwritten at the time of recording by checking the transferred image number information even in the area where the image is currently recorded, as shown in FIG. Image management information such as the final recording time, final transfer time, recorded image number, and untransferred image number can be recorded and updated in the recording medium 120 in accordance with the recording of the image data.
When an image data retransmission request signal is received, the image data, image number, and incidental information are retransmitted.

  In image recording by the monitoring recorder 100, it may be desired to start recording a little later than the time when the recording start condition is satisfied. For example, when the vibration sensor 404 detects strong vibration due to a collision or the like, the recording start condition is set. In general, in the case of a collision accident, an image several seconds before the collision is more important than an image after the collision. Therefore, even in the running state or the standby state, the image input to the video interface 110 is always recorded in the RAM 153 or a part of the recording medium 120, and in advance in this way when the recording start condition is satisfied. The recording start time can be traced back using the image information recorded in (1). The function of leaving a record retroactively before satisfying the recording start condition is called a pre-alarm recording function.

  Next, the transfer operation will be described. In FIG. 4, it is assumed that the vehicle 400a is about to return to the parking lot 700. When the vehicle 400a enters a communication area (not shown) with the wireless LAN base station 500, the wireless LAN interface 130 of the monitoring recorder 100 shown in FIG. The CPU 151 is notified that connection is possible. The CPU 151 issues a connection attempt instruction to the wireless LAN interface 130. In this way, the monitoring recorder 100 attempts to connect to the wireless LAN, and starts communication if the connection is successful.

  FIG. 6 is a diagram illustrating an example of a recorded image management table in the image storage server 600. FIG. 6A shows an image accumulation table. Table items include a management number, a recorder ID, an image number, an incidental number, and image data. The management number is for managing images in the image storage server 600, and is assigned so as not to overlap in the image storage table. The recorder ID is an identification number assigned to the individual of the monitoring recorder 100 that recorded the image. The image number, incidental information, and image data are information when an image is recorded by the monitoring recorder 100. Note that supplementary information may be added by the image storage server 600.

  FIG. 6B shows an example of a recorder management table. Table items include recorder ID, authentication information, recording range, previous transfer image range, vehicle information, and the like. The recorder ID is an identification number for identifying the individual monitoring recorder 100. In the authentication information, information used for verifying whether or not each individual of the monitoring recorder 100 is correctly registered at the time of connection is recorded. The recording range records up to which image number an image was recorded when the monitoring recorder 100 was connected last time. The previously transferred image range is transferred when the monitoring recorder 100 is connected last time, and the range of image numbers that have been successfully recorded is recorded. The vehicle information is information relating to the vehicle to which the individual monitoring recorder 100 is attached, and records information such as the vehicle type and license plate.

FIG. 7 is a flowchart for explaining image data transfer and recording operations between the monitoring recorder and the image storage server. Hereinafter, the transfer operation will be described with reference to FIG.
As shown in FIG. 4, when the vehicle 400a enters the parking lot 700 and the vehicle 400a enters the communicable area with the wireless LAN base station 500, the monitoring recorder 100 attached to the vehicle 400a (see FIG. 3) The wireless LAN interface 130 detects a radio wave transmitted from the base station 500 and notifies the CPU 151 that it can connect to the wireless LAN. The CPU 151 controls the wireless LAN interface 130 to perform a connection operation with respect to the nearest base station 500. If the connection condition is satisfied, the CPU 151 is connected to the network. At this point, the monitoring recorder 100 detects that it is connected to the network (S100). Next, the monitoring recorder 100 searches for the image storage server 600 which is a communication partner using the host name and network address stored as the search information (S101).

  When the image storage server 600 is found, the monitoring recorder 100 sends a communication start request to the image storage server 600 (S102), and when the image storage server 600 returns a communication start approval (S200), the monitoring recorder 100 and the image storage server Communication between 600 is started.

  When communication is started, authentication information such as a certificate is first exchanged (S103, S201), and it is confirmed whether or not the communication partner is correct (S104, S202).

  Next, the monitoring recorder 100 transmits the image management information (FIG. 5B) to the image storage server 600 (S105), and the image storage server 600 records it (S203). At this time, if there is a mismatch in management information such as a mismatch between the previous transfer image number (range) in FIG. 5B and the previous transfer range in FIG. 6B, the image is retransmitted from the image storage server 600 to the monitoring recorder 100. The requested image number is transmitted, and the previously transferred image number and the untransferred image number are corrected and recorded (S203, S105). Such inconsistencies in management information can also be used for countermeasures such as leaving a record or issuing an alarm by determining that there is a possibility of falsification.

Next, an image to be transferred is determined from the management information, and image data transfer is started. Normally, an untransferred image is transferred.
First, the monitoring recorder 100 selects untransferred data from the image table (FIG. 5A) and transmits image data (S106). The image storage server 600 that has received the data adds the information and records it in the image storage table (FIG. 6A) (S204). When the recording is successful, an image data transfer success notification is sent to the monitoring recorder 100, and when it is unsuccessful, an image data retransmission request is sent to the monitoring recorder 100 (S205).
The monitoring recorder 100 updates the image management information (FIG. 5B) such as the change of the previous transfer image number and the untransferred image number when receiving the transfer success notification and when receiving the retransmission request (S107). ), Untransferred data is selected from the image table (FIG. 5A), and image data is transmitted or retransmitted (S106). These image data transfer operations are repeated until there is no untransferred image or communication is cut off due to movement of the vehicle (S106, S107).

When confirming that there are no untransferred images, the monitoring recorder 100 notifies the image storage server 600 of the end of transfer (S108), and performs communication end processing such as disconnection of communication (S109).
Further, when the communication is disconnected due to movement of the vehicle or the like, communication end processing such as communication disconnection is performed (S109).
Note that the image storage server 600 determines that the transfer has ended when the transfer end is received or when the communication is disconnected (S206), and performs communication end processing such as communication disconnection (S207).

  Even if the communication is disconnected before the transfer of all untransferred images is completed due to movement of the vehicle or the like, the monitoring recorder 100 uses the image management information (FIG. 5B) and the image storage server 600 uses the recorder management. In the table (FIG. 6B), the range in which transfer completion can be confirmed is recorded as the previous transfer image number, so that image management information is checked and corrected when communication is started next (S203). , S105), the transfer of untransferred images without duplication or omission can be resumed.

As described above, since the image data recorded in the in-vehicle monitoring recorder can be transferred to the image storage server outside the vehicle via the network, the storage capacity of the image data can be substantially increased.
In addition, even when the connection between the in-vehicle monitoring recorder and the network is intermittent, such as when the vehicle is moving, the connection to the network and the transfer of image data can be automatically performed. It can be controlled not only from the vehicle internal information such as brake operation and engine switch on / off, but also from the storage server side via the network.
Therefore, the possibility of not only monitoring in the parking lot but also constant monitoring even when the vehicle is moving was obtained. In this monitoring mode, by setting the monitoring conditions of the monitoring recorder individually, the operation according to the operation status of the vehicle, the monitoring purpose, and the state of the vehicle becomes possible.

  The in-vehicle monitoring recorder according to the present invention and the system using the same include passenger business such as taxis, buses and trains, transportation business such as truck and courier services, sales department with vehicles for customers, police police cars, etc. It can also be applied to cases where constant monitoring of the vehicle operation status is required. Hereinafter, the operation will be described with examples of daily vehicle operations.

  As a typical example, let us consider an operation in which the vehicle leaves the parking lot in the morning, operates the vehicle during the day, returns to the parking lot in the evening, and parks in the parking lot at night. A case will be described in which recording is performed while the engine key is on, and when the door sensor and vibration sensor are operated even during standby, recording is set to be performed by the pre-alarm recording function.

  Before the driver gets into the vehicle 400 in the morning, the monitoring recorder 100 is in a standby state. For example, a captured image signal (image data) for the past 10 seconds from the in-house monitoring camera 300b is constantly recorded in the RAM 153. When the driver opens the door of the vehicle 400, based on the signal from the door sensor 403, the monitoring recorder 100 starts the recording operation by the pre-alarm recording function, and the image data recorded in the RAM 153 includes the image number and the incidental data. The information is recorded on the recording medium 120 through the recording / playback control unit 121 together with the information.

  The RAM 153 functions as a buffer for maintaining the continuity of the image data before and after the door is opened. If the image data from the camera 300b disappears in the RAM 153, the image data from the camera 300b is The video I / F 110 is recorded on the recording medium 120 via the bus 155 and the recording / playback control unit 121.

  Next, when the engine of the vehicle 400 is started, all of the cameras 300a to 300c operate and sequentially start intermittent recording. Further, the connection with the base station 500 and the image storage server 600 and the data transfer operation may be started.

When the vehicle 400 starts moving and goes out of the parking lot 700, the monitoring recorder 100 performs a monitoring recording operation during operation.
For example, if the video switch 111 selects the front monitoring camera 300a for 2 seconds, the in-vehicle monitoring camera 300b and the rear monitoring camera 300c select one frame, and each frame is recorded on the recording medium 120, the interval is 2 seconds. A monitoring image can be recorded.
Further, by always storing the 10-second image data from the front monitoring camera 300a in the RAM 153, the pre-alarm function can be operated when the vibration sensor 404 detects an abnormality such as an accident.

  Next, a case where the vehicle is parked in the parking lot and separated from the vehicle will be described. The wireless LAN interface 130 detects that the parking area 700 has entered the communication area, the side brake sensor 404 detects that the side brake has been pulled, and the driver goes out of the vehicle 400 and the door is closed. When this is detected by the human sensor 405 and the door sensor 403, monitoring in a standby state is performed based on a control signal from the CPU 151.

  In the evening, when the work is finished and the parking lot 700 is returned, the monitoring recorder 100 detects the connection to the network and starts the transfer operation to the image storage server 600. After parking, when the driver stops the engine and gets off the vehicle, the recording operation stops. Thereafter, when the transfer operation is completed, the monitoring recorder 100 enters a standby state.

  Even when the parking lot 700 is not parked, when the driver turns off the engine and gets off the vehicle, such as during a break, the monitoring recorder 100 enters a standby state.

  Even in the standby state as described above, the pre-alarm recording is activated by detecting the collision of another vehicle or the window glass being broken by the vibration sensor 404, and image recording or image data transfer is performed. Can be done.

  They may also park or pass through other people's parking lots that use the same recording and transfer system during operation. In this case, data transfer is not started because connection is normally impossible due to network settings or server search fails. Even if these settings are coincident and communication with the image storage server is started, authentication information is exchanged to authenticate each other so that the monitoring recorder 100 transfers the image to the wrong image storage server. Can be prevented.

  As described above, in this monitoring recorder, recording is started, stopped, transfer started, stopped, and the recorded image on the monitoring recorder is automatically deleted. Monitoring becomes possible.

  In addition, there is no need for the driver to manually attach and detach the recording media such as magnetic tape and removable hard disk. Forgetting to install the recording media, forgetting to submit, deliberate destruction or non-submission, alteration or replacement of data. Preventing work, reducing labor and management, and improving the reliability of operation records.

  In addition, since there is no need for a person to touch during daily operation, the degree of freedom of assembly in the vehicle can be increased. It can be installed in places where it is difficult to touch, preventing the criminals from snatching the recording media and surveillance recorder itself, and the destruction of recorded images by accidental drivers etc. It becomes possible.

  In the above description, an example using a wireless network has been described, but various variations are conceivable regarding connection methods such as a method using a wired network, optical communication, wireless communication, and a method using a mobile phone. Further, embodiments other than those shown in the example are possible for the operating conditions of the monitoring recorder, the type of sensor, the communication procedure, the data format, and the like.

It is a system block diagram explaining an example of the usage pattern of the monitoring recorder of this invention. It is a system configuration figure showing an example of connection of a surveillance recorder and related equipment of this invention. It is a block diagram which shows the structural example of the monitoring recorder of this invention. It is a system configuration figure explaining an example of operation using a surveillance recorder of this invention. It is an example of the recorded image management table of the surveillance recorder of this invention. It is an example of the recording image management table of the image storage server which collects and stores information of the monitoring recorder of the present invention. It is a flowchart explaining transfer and recording operation | movement of the image data between the monitoring recorder of this invention, and an image storage server.

Explanation of symbols

100 surveillance recorder, 110 video interface, 111 video switch, 112 A / D converter, 113 image compression unit, 120 recording medium, 130 wireless LAN interface, 141 sensor input interface, 142 CAN interface, 143 timer, 151 CPU, 152 ROM 153 RAM, 154 EPROM, 155 bus, 200 antenna, 300 camera, 400 vehicle, 401 vehicle control microcomputer, 402 side brake sensor, 403 door sensor, 404 vibration sensor, 500 wireless LAN base station, 600 image storage server, 610 operation terminal 620 DVD recorder, 700 parking lot, 800 management room.

Claims (8)

Monitoring image signal input processing means for digitally processing a monitoring image signal from an in-vehicle monitoring camera and outputting a digital image signal;
A recording / reproduction control means for controlling recording and reproduction of the digital image signal and its image number, auxiliary information and image management information with respect to a recording medium;
Communication control means for controlling connection between the recording / playback control means and the video storage device outside the vehicle via a network;
Control means for controlling operations of the monitoring image signal input processing means, the recording / reproducing control means, and the communication control means,
When the communication control means succeeds in connecting to the video storage apparatus outside the vehicle via a network, the video storage apparatus displays the digital image signal output from the recording / playback control means, its image number, and additional information. A vehicle-mounted monitoring recorder characterized by being transferred to the vehicle.   The control means controls operations of the monitoring image signal input processing means, the recording / reproducing control means, and the communication control means based on an output of a vehicle state detection sensor that detects a state of the vehicle. Item 2. A vehicle-mounted monitoring recorder according to item 1.   The control means controls transmission of a digital image signal recorded on the recording medium, its image number, and incidental information based on a connection detection signal output from the communication control means to the video storage device outside the vehicle. The in-vehicle monitoring recorder according to claim 1.   The control means receives an image data transfer success notification signal returned from the video storage device outside the vehicle, updates the transferred image number or the untransferred image number, and records it on the recording medium. The in-vehicle monitoring recorder according to any one of claims 1 to 3.   Search information storage means for storing search information for searching the video storage device outside the vehicle is provided, and the communication control means connects to the video storage device outside the vehicle based on the search information. The in-vehicle monitoring recorder according to any one of claims 1 to 4, wherein the monitoring monitor is mounted.   The authentication information storage means for storing authentication information for proving identity is provided, and the communication control means transmits the authentication information to the video storage device outside the vehicle. The vehicle-mounted monitoring recorder in any one.   Connection destination authentication information storage means for storing search information for searching the video storage device outside the vehicle and connection destination authentication information is provided, and the authentication information transmitted from the video storage device outside the vehicle and the connection destination authentication information are The in-vehicle monitoring recorder according to any one of claims 1 to 6, wherein, when they match, the communication control means outputs a connection detection signal with the video storage device outside the vehicle. In an in-vehicle monitoring recorder that records a digital image signal obtained by digital signal processing of a monitoring image signal from an in-vehicle monitoring camera and its image number and incidental information, and transfers it to a video storage device outside the vehicle via a network,
A connection detection step of detecting a radio wave transmitted from a base station of the network and performing a connection operation to detect that a connection condition with the base station is satisfied,
An image storage device search step for performing a search using a host name or a network address stored as search information of the image storage device when a connection with the base station is detected;
A communication start request step for sending a communication start request when the image storage device can be searched; and
A certificate transmission / reception step for exchanging authentication information such as a certificate when a communication permission notification is returned from the image storage device;
A communication partner confirmation step for confirming whether or not the communication partner is correct based on the authentication information;
An image management information transmission step of transmitting image management information to the image storage device when it is confirmed that the communication partner is correct;
An image data transmission step of selecting and transmitting untransferred image data to the image storage device from an image table in which an image number, image data, and incidental information are recorded;
An image management information update step for updating image management information including an untransferred image number when receiving a transfer success notification of the transmitted image data from the image storage device;
An in-vehicle monitoring recorder comprising: a communication end processing step for performing a communication end process when the image data transmission step and the image management information update step are repeated and there is no untransferred image or communication is disconnected. Image data transfer method.

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