In-vehicle device and imaging information management method

Abstract

To provide an in-vehicle device that records imaging information obtained by taking from inside a vehicle the surroundings of the vehicle in a state where the information is easy to identify during playback.SOLUTION: An in-vehicle device 30A is communicatively connected to an imaging device 10 and a sound collection device 20 installed in a vehicle X1, which take pictures of the surroundings of the vehicle X1, and is provided with a feature information acquisition unit 313, a subject information acquisition unit 314, a file generation unit 317, and a storage unit 32. The feature information acquisition unit 313 recognizes the contents of speech by a person that is collected by the sound collection device 20, and acquires feature information indicating features of the vehicle's appearance from the recognized content. The subject information acquisition unit 314 analyzes the imaging information captured by the imaging device 10 to identify a vehicle, which is a subject corresponding to the feature information, and acquires vehicle type information of the identified vehicle. The file generation unit 317 generates an electronic file of the imaging information with a file name that includes the vehicle type information obtained by the subject information acquisition unit 314. The storage unit stores the electronic file generated by the file generation unit 317.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to in-vehicle devices and imaging information management methods.

Background Art

[0002] In recent years, widely popular drive recorders are equipped with a function of photographing the surroundings of a vehicle from within the installed vehicle and recording imaging information at the time of events such as impacts or sudden accelerations / decelerations as electronic files. By playing back the electronic files recorded in this way, it is possible to check the situation of the vehicle and its surroundings at the time of the event later.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when a large number of electronic files are recorded in a drive recorder, there is a problem that it takes a great deal of time and effort to identify a desired electronic file at the time of playback.

[0005] An object of the present invention is to provide an in-vehicle device and an imaging information management method for recording imaging information obtained by photographing the surroundings of a vehicle from within the vehicle in a state where it is easy to identify at the time of playback.

Means for Solving the Problems

[0006] One aspect of one or more embodiments for achieving the above object is an in-vehicle device including an imaging device installed in a vehicle for photographing the surroundings of the vehicle, and a sound collection device communicably connected thereto. The in-vehicle device includes a feature information acquisition unit configured to recognize the content of speech by a person collected by the sound collection device and acquire feature information indicating features of the exterior of the vehicle from the recognized content, a subject information acquisition unit configured to analyze the imaging information photographed by the imaging device to identify the vehicle that is the subject corresponding to the feature information and acquire vehicle type information of the identified vehicle, a file generation unit configured to generate an electronic file of the imaging information with a file name including the vehicle type information acquired by the subject information acquisition unit, and a storage unit configured to store the electronic file generated by the file generation unit.

[0007] In addition, one aspect of one or more embodiments is an imaging information management method. An in-vehicle device installed in a vehicle for photographing the surroundings of the vehicle and communicably connected to a sound collection device recognizes the content of speech by a person collected by the sound collection device, acquires feature information indicating features of the exterior of the vehicle from the recognized content, analyzes the imaging information photographed by the imaging device to identify the vehicle that is the subject corresponding to the feature information, acquires vehicle type information of the identified vehicle, and generates and stores an electronic file of the imaging information with a file name including the acquired vehicle type information.

Advantages of the Invention

[0008] According to the in-vehicle device and the imaging information management method according to one aspect of one or more embodiments, imaging information obtained by photographing the surroundings of the vehicle from inside the vehicle can be recorded in a state that is easy to identify during playback.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3A

Figure 3B

Figure 4

Embodiments for Carrying Out the Invention

[0010] Hereinafter, a drive recorder using an in-vehicle device according to an embodiment of the present invention and an imaging information management method using this in-vehicle device will be described.

[0011] 《First Embodiment》 〈Configuration of a Drive Recorder Using an In-Vehicle Device According to the First Embodiment〉 FIG. 1 is a block diagram showing the configuration of a drive recorder according to the first embodiment. In this embodiment, the drive recorder 1A is installed inside a vehicle and includes an imaging device 10, a sound collection device 20, and an in-vehicle device 30A. The imaging device 10 captures images around the installed vehicle, specifically, at least one of the front, rear, or side directions of the vehicle. In this embodiment, the imaging device 10 captures images with a horizontal angle of view of 360 degrees, including the front, rear, and sides of the installed vehicle. The sound collection device 20 captures ambient sound by taking in the surrounding sound as information.

[0012] The in-vehicle device 30A has a CPU 31A and a storage unit 32. The CPU 31A is, for example, a CPU (Central Processing Unit) provided in a general-purpose microcomputer, and by installing and executing a predetermined imaging information management program, it constitutes one or more of the following information processing units.

[0013] The CPU 31A includes an imaging information acquisition unit 311, an audio information acquisition unit 312, a feature information acquisition unit 313, a subject information acquisition unit 314, a first driving type identification unit 315, a first folder generation unit 316, a file generation unit 317, and an output control unit 318.

[0014] The imaging information acquisition unit 311 acquires imaging information captured by the imaging device 10. The audio information acquisition unit 312 acquires sound information picked up by the sound collection device 20.

[0015] The feature information acquisition unit 313 recognizes the speech content by a person from the sound information acquired by the audio information acquisition unit 312, and acquires feature information indicating the features of the vehicle's exterior from the recognized speech content. The feature information acquired by the feature information acquisition unit 313 is information indicating the general exterior features of the vehicle.

[0016] The subject information acquisition unit 314 analyzes the imaging information acquired by the imaging information acquisition unit 311, identifies the vehicle of the subject corresponding to the feature information acquired by the feature information acquisition unit 313, and acquires the vehicle type information of the identified vehicle. The vehicle type information of the vehicle acquired by the subject information acquisition unit 314 is information about the vehicle that is more detailed than the above-described feature information.

[0017] The first driving type identification unit 315 analyzes the imaging information acquired by the imaging information acquisition unit 311, and identifies the type of dangerous driving that the vehicle of the subject identified by the subject information acquisition unit 314 is performing.

[0018] The first folder generation unit 316 generates an electronic folder for storing electronic files in the storage unit 32 with a folder name including information on the type of dangerous driving identified by the first driving type identification unit 315. The file generation unit 317 generates an electronic file of the imaging information acquired by the imaging information acquisition unit 311 including the vehicle type information acquired by the subject information acquisition unit 314 in the file name, and stores it in the electronic folder generated in the storage unit 32.

[0019] The output control unit 318 reads out the files stored in the storage unit 32 and outputs them to an external output device (not shown).

[0020] The storage unit 32 stores a plurality of electronic folders 321 to 324 generated by the first folder generation unit 316 and video files stored in each electronic folder.

[0021] <Operation of the Drive Recorder According to the First Embodiment> An example of the operation of the drive recorder 1A according to this embodiment will be described with reference to FIGS. 2, 3A, and 3B. FIG. 2 is a diagram showing a vehicle X1 on which the drive recorder 1A is installed and traveling, and a light vehicle Y1 traveling behind this vehicle X1. FIGS. 3A and 3B are flowcharts showing the operations executed by the in-vehicle device 30A during the operation of the drive recorder 1A.

[0022] When the operation of the drive recorder 1A starts (''YES'' in S1), the imaging device 10 starts photographing the surroundings of the vehicle X1, and the sound collection device 20 starts collecting the sound around this sound collection device 20. The imaging information acquisition unit 311 of the in-vehicle device 30A starts the process of sequentially acquiring the imaging information photographed by the imaging device 10. Also, the audio information acquisition unit 312 starts the process of sequentially acquiring the information of the sound collected by the sound collection device 20 (S2).

[0023] The feature information acquisition unit 313 recognizes the speech content by a person from the sound information acquired by the audio information acquisition unit 312, and determines whether the recognized speech content includes feature information indicating the features of the appearance of the vehicle.

[0024] For example, when it is considered that the user P1 riding in the vehicle X1 may be making a provoking driving gesture that the white light vehicle Y1 traveling behind the vehicle X1 is dangerous driving, the user P1 utters the feature information ''white light vehicle'' indicating the features of the appearance of this light vehicle Y1. When the user P1 makes this utterance, the sound collection device 20 collects the sound of this utterance and transmits the collected sound information to the in-vehicle device 30A.

[0025] In in-vehicle device 30A, voice information acquisition unit 312 acquires the sound information transmitted from sound collection device 20, and feature information acquisition unit 313 detects that feature information indicating the features of the exterior of the vehicle, namely, "white light vehicle", is included in this sound information, and acquires this feature information ( "YES" in S3).

[0026] When feature information acquisition unit 313 acquires the feature information "white light vehicle", subject information acquisition unit 314 analyzes the imaging information acquired by imaging information acquisition unit 311 to identify light vehicle Y1, which is the vehicle of the subject corresponding to this feature information "white light vehicle". By performing processing in this way, even when there are a plurality of vehicles around vehicle X1, subject information acquisition unit 314 can identify the vehicle performing dangerous driving from within the imaging information.

[0027] Also, subject information acquisition unit 314 acquires the vehicle type information of the identified light vehicle Y1 by analyzing the imaging information (S4). This vehicle type information is more detailed information about the vehicle than the above-described feature information, and is, for example, the vehicle type, model year, or vehicle number of the vehicle. Here, feature information acquisition unit 313 acquires the vehicle number "Shinagawa aaa sa aa-aa" as the vehicle type information of light vehicle Y1.

[0028] Here, when there are a plurality of vehicles around vehicle X1 that are similar in color and shape to light vehicle Y1, user P1 may speak vehicle type information such as the vehicle type, model year, or vehicle number of the vehicle, and feature information acquisition unit 313 may acquire this vehicle type information and send it to subject information acquisition unit 314. Thereby, even when there are a plurality of vehicles with similar colors and shapes around vehicle X1, subject information acquisition unit 314 can identify the vehicle performing dangerous driving from within the imaging information.

[0029] Also, first driving type identification unit 315 analyzes the imaging information acquired by imaging information acquisition unit 311 to identify the type of dangerous driving being performed by light vehicle Y1 identified by subject information acquisition unit 314 (S5). Here, first driving type identification unit 315 identifies the type of dangerous driving "provoking driving" being performed by light vehicle Y1.

[0030] When the first driving type specifying unit 315 specifies the type of dangerous driving "tailgating" that the light vehicle Y1 is performing, the first folder generation unit 316 determines whether an electronic folder with a folder name including information indicating this type of dangerous driving "tailgating" exists in the storage unit 32 (S6).

[0031] When the first folder generation unit 316 determines that there is no corresponding electronic folder in the storage unit 32 ( "NO" in S7), it generates a "tailgating" folder 321, which is an electronic folder with a folder name including information indicating "tailgating", in the storage unit 32 (S7). The creation location of this "tailgating" folder 321 is at the same level as the creation location of the folder for storing video information during normal driving and video information at the time of other event occurrences in the storage unit 32. If the "tailgating" folder 321 is created in a folder for storing video information during normal driving or video information at the time of other event occurrences, the hierarchy will become deep and it will be difficult to search for later, so it is not created in such a location.

[0032] When the first folder generation unit 316 determines that there is a corresponding electronic folder in the storage unit 32 ( "YES" in S6), it proceeds to step S8.

[0033] The file generation unit 317 generates an electronic file "Shinagawa aaa sa aa - aa" file 321a for storing video information that includes the vehicle number "Shinagawa aaa sa aa - aa" acquired by the subject information acquisition unit 314 in the file name, and stores it in the "tailgating" folder 321 generated in the storage unit 32 (S8). The file generation unit 317 may further add the feature information "white light vehicle" to this file name to generate an electronic file. The file generation unit 317 starts a process of sequentially adding the imaging information acquired by the imaging information acquisition unit 311 later to this "Shinagawa aaa sa aa - aa" file 321a for storage (S9).

[0034] The object information acquisition unit 314 analyzes the imaging information sequentially acquired by the imaging information acquisition unit 311 to determine whether or not the light motor vehicle Y1 is included as an object in each piece of imaging information. After generating the "Shinagawa aaa sa aa-aa" file 321a, the file generation unit 317 sequentially adds and stores the imaging information acquired by the imaging information acquisition unit 311 in the generated "Shinagawa aaa sa aa-aa" file 321a until the light motor vehicle Y1 is no longer included as an object in the acquired imaging information and a predetermined time (for example, 3 minutes) has elapsed ("NO" in S10).

[0035] When the light motor vehicle Y1 is no longer included in the imaging information sequentially acquired by the imaging information acquisition unit 311 and a predetermined time has elapsed ("YES" in S10), the file generation unit 317 ends the process of storing the imaging information in this "Shinagawa aaa sa aa-aa" file 321a (S11).

[0036] The processes of steps S3 to S11 described above are repeated while the drive recorder 1A is operating ("NO" in S12). As a result, electronic folders for each type of dangerous driving are appropriately generated in the storage unit 32, and electronic files of video information corresponding to each type are stored in each electronic folder.

[0037] For example, as shown in FIG. 1, a "Tailgating" folder 321, a "Weaving" folder 322, a "Hard Acceleration" folder 323, and a "Speeding" folder 324 are generated in the storage unit 32. Then, the "Shinagawa aaa sa aa-aa" file 321a and the "Kawasaki bbb ta bb-bb" file 321b are stored in the "Tailgating" folder 321. Also, the "Tama ccc na cc-cc" file 322a is stored in the "Weaving" folder 322. Further, the "Shinagawa ddd ha dd-dd" file 323a is stored in the "Hard Acceleration" folder 323. Also, the "Setagaya eee ma ee-ee" file 324a is stored in the "Speeding" folder 324.

[0038] When the drive recorder 1A stops (the answer to S12 is "YES"), the process ends. When playing back the recorded desired electronic file, the user inputs at least one of the type of dangerous driving or vehicle type information to a device equipped with a browsing application for browsing the drive recorder 1A or the files stored in the drive recorder 1A. Then, the output control unit 318 reads out the file corresponding to the input information from the storage unit 32 and outputs it to an external output device. Note that the drive recorder 1A itself may have a browsing function. At this time, since each file is classified and stored in a folder for each type of dangerous driving, the output control unit 318 can easily search for the file to be read out.

[0039] When the user inputs at least one of the type of dangerous driving or vehicle type information, voice recognition processing based on the user's speech may be used.

[0040] According to the above first embodiment, the in-vehicle device is communicably connected to an imaging device that is installed in the vehicle and captures the surroundings of the vehicle, and a sound collection device, and includes a feature information acquisition unit, a subject information acquisition unit, a file generation unit, and a storage unit. The feature information acquisition unit recognizes the content of the speech by a person collected by the sound collection device, and acquires feature information indicating the features of the appearance of the vehicle from the recognized content. The subject information acquisition unit analyzes the imaging information captured by the imaging device, identifies the vehicle of the subject corresponding to the acquired feature information, and acquires the vehicle type information of the identified vehicle. The file generation unit generates an electronic file of the imaging information acquired by the imaging information acquisition unit, including the vehicle type information acquired by the subject information acquisition unit in the file name. The storage unit stores the electronic file generated by the file generation unit.

[0041] Thereby, the imaging information captured by the drive recorder of the surroundings of this vehicle from inside the vehicle can be recorded as an electronic file in a state where it is easy to identify during playback.

[0042] Also, according to the present embodiment, the in-vehicle device further includes a first driving type specifying unit that analyzes imaging information captured by an imaging device and specifies the type of dangerous driving being performed by the subject vehicle, and a first folder generation unit that generates an electronic folder for storing electronic files with a folder name including information indicating the type of dangerous driving specified by the first driving type specifying unit in the storage unit. Further, the file generation unit stores the generated electronic file in the electronic folder generated by the first folder generation unit.

[0043] In this way, by automatically generating a folder for classifying electronic files according to the type of dangerous driving based on the imaging information and storing the corresponding electronic files for each folder, when reproducing the electronic files in the drive recorder, it becomes possible to more easily search for the desired electronic files.

[0044] 《Second Embodiment》 〈Configuration of Drive Recorder Using In-Vehicle Device According to Second Embodiment〉 The drive recorder 1B using the in-vehicle device 30B according to the second embodiment has a second driving type specifying unit 319 in the CPU 31B instead of the first driving type specifying unit 315, and a second folder generation unit 320 instead of the first folder generation unit 316. Otherwise, it is the same as the configuration of the drive recorder 1A described in the first embodiment, so the detailed description of the parts having the same functions is omitted.

[0045] The second driving type specifying unit 319 recognizes the content of the speech by a person picked up by the sound collecting device 20 and specifies the type of dangerous driving from the recognized content. The second folder generation unit 320 generates an electronic folder for storing electronic files with a folder name including information on the type of dangerous driving specified by the second driving type specifying unit 319 in the storage unit 32.

[0046] 〈Operation of Drive Recorder According to Second Embodiment〉 An example of the operation of the drive recorder 1B according to the present embodiment will be described with reference to FIGS. 2, 3A, and 3B.

[0047] When the operation of the drive recorder 1B starts ( "YES" in S1), the imaging device 10 starts photographing the surroundings of the vehicle X2, and the sound collecting device 20 starts collecting the sound around this sound collecting device 20. The imaging information acquisition unit 311 of the in-vehicle device 30B starts the process of sequentially acquiring the imaging information photographed by the imaging device 10. Also, the audio information acquisition unit 312 starts the process of sequentially acquiring the information of the sound collected by the sound collecting device 20 (S2).

[0048] The feature information acquisition unit 313 recognizes the speech content by a person from the sound information acquired by the audio information acquisition unit 312, and determines whether the recognized speech content includes feature information indicating the features of the appearance of the vehicle.

[0049] For example, when the user P2 riding in the vehicle X2 shown in FIG. 2 determines that the white compact car Y2 traveling behind the vehicle X2 is performing a dangerous driving slalom operation, the user P2 speaks the feature information "The white compact car is performing a slalom operation" indicating the features of the appearance of this compact car Y2. When the user P2 makes this speech, the sound collecting device 20 collects the sound of this speech and transmits the collected sound information to the in-vehicle device 30B.

[0050] In the in-vehicle device 30B, the audio information acquisition unit 312 acquires the sound information transmitted from the sound collecting device 20, and the feature information acquisition unit 313 detects that the sound information includes "white compact car", which is feature information indicating the features of the appearance of the vehicle, and acquires this feature information ( "YES" in S3).

[0051] When the feature information acquisition unit 313 acquires the feature information "white compact car", the subject information acquisition unit 314 analyzes the imaging information acquired by the imaging information acquisition unit 311 to identify the compact car Y2, which is the vehicle of the subject corresponding to this feature information "white compact car", and acquires the vehicle type information of the identified compact car Y2 (S4). Here, the feature information acquisition unit 313 acquires the vehicle number "Tama ccc cc-cc" as the vehicle type information of the compact car Y2.

[0052] Further, the second driving type specifying unit 319 recognizes the content of the speech by a person from the sound information acquired by the voice information acquisition unit 312, and specifies the type of dangerous driving from the recognized content (S5). Here, the second driving type specifying unit 319 specifies the type of dangerous driving, "weaving driving", from the recognized content of the speech.

[0053] When the second driving type specifying unit 319 specifies the type of dangerous driving, "weaving driving", the second folder generation unit 320 determines whether an electronic folder with a folder name including information indicating this type of dangerous driving, "weaving driving", exists in the storage unit 32 (S6).

[0054] When the second folder generation unit 320 determines that there is no corresponding electronic folder in the storage unit 32 ( "NO" in S7), it generates a "weaving driving" folder 322, which is an electronic folder with a folder name including information indicating "weaving driving", in the storage unit 32 (S7). When the second folder generation unit 320 determines that there is a corresponding electronic folder in the storage unit 32 ( "YES" in S6), it proceeds to step S8.

[0055] The file generation unit 317 generates an electronic file, the "Tama ccc na cc - cc" file 322a, which is for storing video information and includes the vehicle number "Tama ccc na cc - cc" acquired by the subject information acquisition unit 314 in the file name, and stores it in the "weaving driving" folder 322 generated in the storage unit 32 (S8). The file generation unit 317 may further add the feature information, "white compact car", to this file name to generate an electronic file. The file generation unit 317 starts a process of sequentially adding the imaging information acquired by the imaging information acquisition unit 311 later to this "Tama ccc na cc - cc" file 322a for storage (S9).

[0056] The subject information acquisition unit 314 analyzes the imaging information sequentially acquired by the imaging information acquisition unit 311 to determine whether or not the light motor vehicle Y2 is included as a subject in each piece of imaging information. After generating the "Tama ccc na cc-cc" file 322a, the file generation unit 317 sequentially adds and stores the imaging information acquired by the imaging information acquisition unit 311 in the generated "Tama ccc na cc-cc" file 322a until the light motor vehicle Y2 is no longer included as a subject in the acquired imaging information and a predetermined time (for example, 3 minutes) has elapsed ( "NO" in S10).

[0057] When the light motor vehicle Y2 is no longer included in the imaging information sequentially acquired by the imaging information acquisition unit 311 and a predetermined time has elapsed ( "YES" in S10), the file generation unit 317 ends the process of storing the imaging information in this "Tama ccc na cc-cc" file 322a (S11).

[0058] The processes of steps S3 to S11 described above are repeated while the drive recorder 1B is operating ( "NO" in S12). As a result, electronic folders for each type of dangerous driving are appropriately generated in the storage unit 32, and electronic files of video information corresponding to each type are stored in each electronic folder.

[0059] According to the above second embodiment, the in-vehicle device further includes a second driving type specifying unit that recognizes the content of the speech by a person collected by the sound collecting device and specifies the type of dangerous driving from the recognized content, and in the storage unit, a second folder generation unit that generates an electronic folder for storing electronic files with a folder name including information indicating the type of dangerous driving specified by the second driving type specifying unit. Further, the file generation unit stores the generated electronic file in the electronic folder generated by the second folder generation unit.

[0060] In this way, by automatically generating a folder for classifying electronic files according to the type of dangerous driving based on the information of the sound spoken by a person, it becomes possible to more easily search for a desired electronic file when playing back the electronic files in the drive recorder.

[0061] Incidentally, the above-described drive recorder 1A or 1B may record a video of an object other than a vehicle performing dangerous driving based on the content of a person's speech. For example, when a person says "I can see a mountain", if the voice information acquisition unit 312 acquires information on this speech content and the feature information acquisition unit 313 acquires "mountain", which is the object type information, from this information, the first folder generation unit 316 or the second folder generation unit 320 generates a "mountain" folder, which is an electronic folder with a folder name containing the information on "mountain", in the storage unit 32. Then, when the subject information acquisition unit 314 analyzes the imaging information obtained by the imaging device 10 to identify the subject corresponding to "mountain", the file generation unit 317 generates a "mountain" file, which is an electronic file containing "mountain" in the file name, and stores it in the "mountain" folder. The file generation unit 317 sequentially stores the imaging information acquired thereafter in the "mountain" file, and when the subject corresponding to "mountain" is no longer included in the imaging information and a predetermined time has elapsed, the storage process of the imaging information is terminated.

[0062] In this way, by performing the storage process of the imaging information related to the content of a person's speech, the user can store the video information related to a desired object in a situation where it is easy to search for playback later.

Explanation of Reference Numerals

[0063] 1A, 1B Drive Recorder 10 Imaging Device 20 Sound Collection Device 30A, 30B Vehicle-mounted Devices 31A, 31B CPU 32 Storage Unit 311 Imaging Information Acquisition Unit 312 Voice Information Acquisition Unit 313 Feature Information Acquisition Unit 314 Subject Information Acquisition Unit 315 First Driving Type Identification Unit 316 First Folder Generation Unit 317 File Generation Unit 318 Output Control Unit 319 Second Driving Type Identification Unit 320 Second Folder Generation Unit 321 "Taunting Driving" Folder 322 "Serpentine Driving" Folder 323 "Sudden Acceleration" Folder 324 "Speed Exceedance" Folder

Claims

1. An imaging device installed in a vehicle for photographing the surroundings of the vehicle, and communicably connected to a sound collection device, a feature information acquisition unit that recognizes the content of speech by a person collected by the sound collection device, and acquires feature information indicating features of the appearance of the vehicle from among the recognized content; a subject information acquisition unit that analyzes the imaging information photographed by the imaging device to identify the vehicle that is the subject corresponding to the feature information, and acquires vehicle type information of the identified vehicle; a file generation unit that generates an electronic file of the imaging information with a file name including the vehicle type information acquired by the subject information acquisition unit; an in-vehicle device comprising a storage unit that stores the electronic file generated by the file generation unit.

2. a first driving type identification unit that analyzes the imaging information to identify the type of dangerous driving being performed by the vehicle that is the subject; a first folder generation unit that generates an electronic folder for storing electronic files in the storage unit, with a folder name including information indicating the type of dangerous driving identified by the first driving type identification unit; and the file generation unit stores the generated electronic file in the electronic folder generated by the first folder generation unit. The in-vehicle device according to claim 1.

3. a second driving type identification unit that recognizes the content of speech by a person collected by the sound collection device, and identifies the type of dangerous driving from among the recognized content; a second folder generation unit that generates an electronic folder for storing electronic files in the storage unit, with a folder name including information indicating the type of dangerous driving identified by the second driving type identification unit; and the file generation unit stores the generated electronic file in the electronic folder generated by the second folder generation unit. The in-vehicle device according to claim 1.

4. The subject information acquisition unit sequentially acquires the imaging information photographed by the imaging device at predetermined time intervals, and determines whether a vehicle corresponding to the feature information is included as a subject in each acquired imaging information. After generating the electronic file, the file generation unit sequentially adds and stores the imaging information acquired from the imaging device in the generated electronic file until a predetermined time has elapsed after the vehicle corresponding to the feature information is no longer included as a subject in the acquired imaging information. The in-vehicle device according to claim 1.

5. An in-vehicle device installed in a vehicle, communicably connected to an imaging device for photographing the surroundings of the vehicle and a sound collection device, Recognize the content of the speech by a person recorded by the sound collection device, and from the recognized content, obtain feature information indicating the features of the appearance of the vehicle. Analyze the imaging information captured by the imaging device to identify the vehicle that is the subject corresponding to the feature information, and obtain the vehicle type information of the identified vehicle. An imaging information management method for generating and storing an electronic file of the imaging information with a file name including the obtained vehicle type information.

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