Recording control device, recording control method, and program

Abstract

To appropriately monitor parking.SOLUTION: A recording control device includes: a photographic data acquisition section for acquiring photographic data photographed by cameras arranged in a vehicle; a parking detection section for detecting that a vehicle is parking; a parking condition detection section for detecting a parking condition of a vehicle; an event detection section for detecting an event with respect to a vehicle; and a recording control section for changing a time length of photographic data to be stored when the event detection section detects an event based on a parking condition detected by the parking condition detection section, and storing photographic data with the changed time length.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a recording control device, a recording control method, and a program. [Background technology]

[0002] There are drive recorders equipped with a parking monitoring function. For example, Patent Document 1 discloses a technique for determining whether or not parking monitoring is to be performed based on preregistered position information. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-195755 A Summary of the Invention [Problem to be solved by the invention]

[0004] Events that are recorded by the parking monitoring function of the drive recorder include contact and collision with other vehicles, as well as car break-ins. For this reason, the parking monitoring function detects events by motion detection in addition to event detection by an acceleration sensor. In this case, video footage of the vicinity of the time of occurrence of events such as car break-ins, as well as contact and collision with other vehicles, can be recorded. However, car break-ins may involve preliminary inspections, and recording video footage of a period when preliminary inspections may be conducted before the event occurs can be useful in understanding the situation of the event.

[0005] The present invention provides a recording control device, a recording control method, and a program that enable appropriate parking monitoring. [Means for solving the problem]

[0006] A recording control device according to one embodiment of the present invention includes a shooting data acquisition unit that acquires shooting data captured by a camera installed in a vehicle, a parking detection unit that detects that the vehicle is parked, a parking condition detection unit that detects the parking conditions of the vehicle, an event detection unit that detects an event for the vehicle, and a recording control unit that changes the length of time of the shooting data to be saved when the event detection unit detects an event based on the parking conditions detected by the parking condition detection unit, and saves the shooting data with the changed length.

[0007] A recording control method according to one aspect of the present invention includes a recording control device which executes the following steps: a shooting data acquisition step of acquiring shooting data captured by a camera installed in a vehicle; a parking detection step of detecting that the vehicle is parked; a parking condition detection step of detecting the parking conditions of the vehicle; an event detection step of detecting an event for the vehicle; and a recording control step of changing the length of time of the shooting data to be saved when an event is detected in the event detection step based on the parking conditions detected in the parking condition detection step, and saving the shooting data with the changed length.

[0008] A program according to one aspect of the present invention causes a computer operating as a recording control device to execute a photography data acquisition step of acquiring photography data captured by a camera installed in a vehicle, a parking detection step of detecting that the vehicle is parked, a parking condition detection step of detecting the parking conditions of the vehicle, an event detection step of detecting an event for the vehicle, and a recording control step of changing the length of time of the photography data to be saved when an event is detected in the event detection step based on the parking conditions detected in the parking condition detection step, and saving the photography data with the changed length. Effect of the Invention

[0009] According to the present invention, parking monitoring can be performed appropriately. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a recording device according to each embodiment. [Diagram 2] FIG. 2 is a flowchart showing an example of the process flow of the recording control device according to the first embodiment. [Diagram 3] FIG. 3 is a diagram illustrating an example of a method for storing event record data for a normal period according to the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of a method for storing event record data for a normal period according to the first embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of a method for storing event record data for a period longer than a normal period according to the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of a method for storing event record data for a period longer than a normal period according to the first embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of a method for storing event record data for a period longer than a normal period according to the first embodiment. [Figure 8] FIG. 8 is a diagram for explaining a method for storing event record data for a period longer than a normal period according to the first embodiment. [Figure 9] FIG. 9 is a flowchart showing an example of the flow of processing performed by the recording control device according to the second embodiment. [Figure 10] FIG. 10 is a flowchart showing an example of the flow of processing performed by the recording control device according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to this embodiment, and when there are multiple embodiments, the present invention also includes a configuration in which each embodiment is combined. In the following embodiments, the same parts are given the same reference numerals, and duplicated explanations will be omitted.

[0012] The configuration of a recording device according to each embodiment will be described with reference to Fig. 1. Fig. 1 is a block diagram showing an example of the configuration of a recording device according to each embodiment.

[0013] As shown in Fig. 1, the recording device 1 includes an imaging unit 10, a recording unit 20, an operation unit 30, a display unit 40, a sensor 50, a Global Navigation Satellite System (GNSS) signal receiving unit 60, a Controller Area Network (CAN) interface unit 70, and a control unit (recording control device) 100. The recording device 1 is mounted on a vehicle. The recording device 1 detects an impact based on contact and collision with another vehicle as an event, and stores the captured data including the time of occurrence of the event as event recording data. The recording device 1 detects an event such as a car break-in based on a moving object detection result while the vehicle is stopped, and stores the captured data including the time of occurrence of the event as event recording data.

[0014] The imaging unit 10 captures images of the surroundings of the vehicle. The imaging unit 10 captures images of the surroundings of the vehicle, for example. The imaging unit 10 may be composed of, for example, a front camera arranged facing forward in the vehicle cabin and a rear camera arranged facing rearward. The imaging unit 10 may be composed of, for example, a 360° camera arranged in the vehicle cabin. The imaging unit 10 may be composed of cameras for bird's-eye view arranged on the front, rear, left and right sides outside the vehicle cabin. The imaging unit 10 may be composed of a combination of a front camera, a rear camera, a 360° camera, and a bird's-eye view camera. The imaging unit 10 outputs imaging data of the surroundings of the vehicle to the imaging data acquisition unit 120 of the control unit 100.

[0015] The recording unit 20 records various data. For example, the recording unit 20 records loop recording data in which shooting data is converted into a file. For example, the recording unit 20 records event recording data recorded when an event is detected. For example, the recording unit 20 records loop recording data before and after the event detection as overwrite-prohibited recording data. For example, the recording unit 20 stores dictionary data for determining a person. For example, the recording unit 20 can be realized by a semiconductor memory element such as a RAM (Random Access Memory) or a flash memory, or a storage device such as a hard disk or a solid state drive. The recording unit 20 may be composed of a plurality of different memories.

[0016] The operation unit 30 accepts various operations for the recording device 1. The various operations include operations such as starting playback of the event record data and starting saving of the event record data. The operation unit 30 outputs an operation signal corresponding to the accepted operation to the operation control unit 125. The operation unit 30 can be realized by, for example, a physical switch or a touch panel provided on the display unit 40.

[0017] The display unit 40 displays various images. For example, the display unit 40 displays event record data recorded by the recording unit 20. The display unit 40 is a display including, for example, a liquid crystal display (LCD) or an organic electro-luminescence (EL) display.

[0018] The sensor 50 is, for example, an acceleration sensor that detects acceleration. The sensor 50 detects, for example, acceleration applied to the vehicle while it is parked. The sensor 50 can be realized by, for example, a three-axis acceleration sensor. The sensor 50 outputs acceleration information related to the detected acceleration to the event detection unit 127.

[0019] The GNSS signal receiving unit 60 is configured with a GNSS receiver that receives GNSS signals from GNSS satellites, etc. The GNSS signal receiving unit 60 outputs the received GNSS signals to the position information acquisition unit 128.

[0020] The CAN interface unit 70 is an interface for acquiring various vehicle information via the CAN. The vehicle information includes, for example, information on whether the vehicle is parked or not. The CAN interface unit 70 outputs the acquired vehicle information to the parking detection unit 129.

[0021] The control unit 100 is realized, for example, by a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) executing a program (for example, a program according to the present invention) stored in a storage unit (not shown) using a RAM or the like as a working area. The control unit 100 is a controller, and may be realized, for example, by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

[0022] The control unit 100 includes an image capture data acquisition unit 120, a buffer memory 121, an image capture data processing unit 122, a recording control unit 123, a playback control unit 124, an operation control unit 125, a display control unit 126, an event detection unit 127, a position information acquisition unit 128, and a parking detection unit 129. In Fig. 1, the units realized by the control unit 100 are illustrated as if they are connected to each other via a bus 110 for ease of understanding.

[0023] The image capturing data acquisition unit 120 acquires various types of image capturing data from the outside. For example, the image capturing data acquires image capturing data of the periphery of the vehicle from the image capturing unit 10. The image capturing data acquisition unit 120 outputs the acquired image capturing data to the buffer memory 121 and the display control unit 126. The image capturing data acquisition unit 120 may acquire image capturing data including audio data acquired by a microphone (not shown) arranged in the image capturing unit 10 or in another position in addition to the image capturing data.

[0024] The buffer memory 121 is an internal memory that temporarily stores the shooting data acquired by the shooting data acquisition unit 120. Specifically, the buffer memory 121 temporarily stores the shooting data for a certain period of time acquired by the shooting data acquisition unit 120 while updating the data.

[0025] The shooting data processing unit 122 executes various processes on the shooting data temporarily stored in the buffer memory 121. The shooting data processing unit 122 converts the shooting data temporarily stored in the buffer memory 121 into an arbitrary file format, such as MP4 format. The shooting data processing unit 122 generates shooting data as a data file for a certain period of time, for example, from the shooting data temporarily stored in the buffer memory 121. Specifically, the shooting data processing unit 122 generates shooting data for 60 seconds as a data file from the shooting data temporarily stored in the buffer memory 121. The shooting data processing unit 122 outputs the generated shooting data to the recording control unit 123. The shooting data processing unit 122 also outputs the generated shooting data to the display control unit 126. The period of the shooting data generated as a data file is set to 60 seconds as an example, but is not limited to this.

[0026] The recording control unit 123 stores various data in the recording unit 20. For example, the recording control unit 123 controls the recording unit 20 to record the shooting data filed by the shooting data processing unit 122 as loop recording data. For example, when the event detection unit 127 detects an event, the recording control unit 123 stores the shooting data including the time point when the event was detected as event recording data in the recording unit 20. The recording control unit 123 changes the time length of the shooting data to be stored when the event detection unit 127 detects an event based on the parking conditions, and stores the changed time length.

[0027] The playback control unit 124 plays various data recorded in the recording unit 20. The playback control unit 124 plays, for example, shooting data recorded as a data file in the recording unit 20. The playback control unit 124 plays, for example, event recording data stored in the recording unit 20. The playback control unit 124 plays any shooting data in accordance with a control signal output from the operation control unit 125 in response to an operation of the operation unit 30.

[0028] The operation control unit 125 receives an operation signal related to an operation received from a user or the like via the operation unit 30. The operation control unit 125 receives an operation signal related to an operation such as starting playback of shooting data and event recording data, starting recording of shooting data, etc. The operation control unit 125 outputs a control signal corresponding to the received operation signal to the recording control unit 123 or the playback control unit 124. In this case, the recording control unit 123 and the playback control unit 124 execute operations according to the control signal.

[0029] The display control unit 126 displays various images on the display unit 40. For example, the display control unit 126 displays the shooting data and event recording data played back by the playback control unit 124 on the display unit 40. Specifically, the display control unit 126 displays images on the display unit 40 by outputting a video signal to the display unit 40. For example, the display control unit 126 displays the shooting data on the display unit 40 by outputting a video signal related to the shooting data and event recording data recorded in the recording unit 20 to the display unit 40.

[0030] The event detection unit 127 detects an event that occurs in the vehicle. The event detection unit 127 detects an event that occurs in the vehicle based on the acceleration detected by the sensor 50. Specifically, when the sensor 50 detects acceleration equal to or greater than a predetermined value, the event detection unit 127 detects the detected acceleration as an event.

[0031] The event detection unit 127 may detect a moving object from the shooting data acquired by the shooting data acquisition unit 120, and detect an event based on the detection result of the moving object. In this case, the event detection unit 127 detects the presence or absence of a moving object from the shooting data acquired by the shooting data acquisition unit 120. The event detection unit 127 detects an area in which luminance or color information changes from frame to frame, for example, in pixel units or in block units of several pixels square in the shooting data. In this case, the event detection unit 127 determines that a moving object has been detected when a temporal change is detected in an area of ​​a predetermined size or more. When the event detection unit 127 determines that a moving object has been detected, it detects the detection result of the moving object as an event. Note that the method by which the event detection unit 127 detects a moving object is not limited to this, and a moving object may be detected using a well-known method. In addition, the moving object to be detected may be, for example, a moving object having an area of ​​30% or more in an image based on the shooting data.

[0032] The event detection unit 127 may detect a person from the shooting data acquired by the shooting data acquisition unit 120, and detect an event based on the person detection result. In this case, the event detection unit 127 detects the presence or absence of a person from the shooting data acquired by the shooting data acquisition unit 120. For example, the event detection unit 127 scans the shooting data for each frame, and determines that a person has been detected when a person of a predetermined size or larger is detected while referring to a person detection dictionary. When it is determined that a person has been detected, the event detection unit 127 detects the person detection result as an event. Note that the method by which the event detection unit 127 detects a person is not limited to this, and a person may be detected using a well-known method.

[0033] The position information acquisition unit 128 receives the GNSS signal from the GNSS signal receiving unit 60. The position information acquisition unit 128 calculates current position information based on the GNSS signal.

[0034] The parking detection unit 129 detects that the vehicle has been parked. The parking detection unit 129 acquires vehicle information from, for example, the CAN interface unit 70. The parking detection unit 129 detects conditions from the vehicle information, such as that the power of the vehicle's engine or the like has been turned off, that the accessory power source has been turned off, that the parking gear has been selected, that the handbrake has been operated, and that the current position of the vehicle indicates a parking lot. The parking detection unit 129 may detect a combination of various conditions. The parking detection unit 129 detects that the vehicle has been parked based on the detected conditions.

[0035] When the parking detection unit 129 detects that the vehicle has been parked, the parking condition detection unit 130 detects the parking conditions of the vehicle. The parking condition detection unit 130 detects whether the parking conditions of the vehicle are conditions in which an unexpected event is likely to occur or conditions in which a planned event is likely to occur. An unexpected event includes, for example, an event such as contact or collision between vehicles. A planned event includes, for example, an event such as vehicle break-in.

[0036] The parking condition detection unit 130 detects the parking conditions of the vehicle based on, for example, the parking position. The parking condition detection unit 130 detects that the conditions are such that an unexpected event is likely to occur when the parking position of the vehicle is a position where the vehicle is parked for a relatively short time (for example, several minutes to several tens of minutes). Examples of positions where the vehicle is parked for a relatively short time include parking lots of stores used for shopping, parking lots of public facilities, and hourly parking lots. The parking condition detection unit 130 detects that the conditions are such that an intentional event is likely to occur when the parking position of the vehicle is a position where the vehicle is parked for a relatively long time (for example, several hours). Examples of positions where the vehicle is parked for a relatively long time include parking lots at home and monthly rental parking lots.

[0037] The parking condition detection unit 130 detects the parking conditions of the vehicle based on, for example, the time period during which the vehicle is parked. The parking condition detection unit 130 detects that the conditions are such that an unexpected event is likely to occur when the time period during which the vehicle is parked is daytime. The parking condition detection unit 130 detects that the conditions are such that a planned event is likely to occur when the time period during which the vehicle is parked is nighttime.

[0038] The parking condition detection unit 130 detects the parking conditions of the vehicle based on, for example, the brightness of the surroundings of the position where the vehicle is parked. The parking condition detection unit 130 detects that the conditions are such that an unexpected event is likely to occur when the brightness of the surroundings of the position where the vehicle is parked is equal to or higher than a predetermined value. The parking condition detection unit 130 detects that the conditions are such that an intentional event is likely to occur when the brightness of the surroundings of the position where the vehicle is parked is less than a predetermined value.

[0039] The parking condition detection unit 130 may detect the parking conditions based on a combination of the time period during which the vehicle is parked and the brightness of the surroundings of the parking position.

[0040] [Processing of Recording Control Device] The processing of the recording control device according to the first embodiment will be described with reference to Fig. 2. Fig. 2 is a flow chart showing an example of the flow of processing of the recording control device according to the first embodiment.

[0041] When parking monitoring is started, the control unit 100 judges whether the parking position of the vehicle is a position where an unexpected event is likely to occur. As an example of whether the parking position is a position where an unexpected event is likely to occur, it judges whether the parking position is a position where the vehicle is parked for a short time (step S10). Specifically, the parking condition detection unit 130 judges whether the parking position of the vehicle is a position where the vehicle is parked for a short time based on the position information of the parking position. If it is judged that the parking position is a position where the vehicle is parked for a short time (step S10; Yes), the process proceeds to step S11. On the other hand, if it is judged that the parking position of the vehicle is not a position where the vehicle is parked for a short time (step S10; No), the process proceeds to step S14.

[0042] If it is determined as Yes in step S10, the control unit 100 determines whether or not an event has been detected (step S11). Specifically, the event detection unit 127 determines that an event has been detected when a predetermined acceleration or more is applied to the vehicle or when a moving object is detected around the vehicle. If it is determined that an event has been detected (step S11; Yes), the process proceeds to step S12. On the other hand, if it is determined that an event has not been detected (step S11; No), the process proceeds to step S13.

[0043] If the result of the determination in step S11 is Yes, the control unit 100 stores the photographed data during the normal period as event record data (step S12). Specifically, the recording control unit 123 stores the photographed data during the normal period in the recording unit 20 as event record data. A method for storing photographed data during a normal period as event record data will be described with reference to FIG. 3 and FIG.

[0044] In FIG. 3, the recording control unit 123 records the shooting data that has been filed, such as shooting data D1 to shooting data D7, in the recording unit 20 as loop recording data. When the event detection unit 127 detects an event at timing t0, the recording control unit 123 stores the loop recording data of the period from (t0-t1) to (t0+t1) before and after the event as a normal period in the recording unit 20 as event recording data. There is no particular limit to the time t1, but it is, for example, 30 seconds. In this case, the recording control unit 123 stores the shooting data of the 30 seconds before and after the timing t0 when the event detection unit 127 detects the event as event recording data ID1 in the recording unit 20. In this case, the event recording data is stored, for example, in an event recording folder in the recording unit 20.

[0045] 4, the recording control unit 123 sets an overwrite prohibition flag F, which indicates prohibition of overwriting, to the filed photographic data, thereby saving the photographic data as event recording data. For example, when the event detection unit 127 detects an event at timing t0, the recording control unit 123 sets an overwrite prohibition flag F to photographic data D4 including timing t0, thereby saving the photographic data D4 as event recording data.

[0046] Referring again to Fig. 2, the control unit 100 judges whether or not parking monitoring has ended (step S13). Specifically, when the operation control unit 125 receives a signal from the operation unit 30 to end parking monitoring, if the parking detection unit 129 detects the operation of the vehicle's engine, it is judged that parking monitoring has ended. If it is judged that parking monitoring has ended (step S13; Yes), the process of Fig. 2 ends. On the other hand, if it is judged that parking monitoring has not ended (step S13; No), the process proceeds to step S11.

[0047] If it is determined that the result of step S10 is No, the control unit 100 determines whether or not an event has been detected (step S14). The process of step S14 is the same as the process of step S11, and therefore a description thereof will be omitted. If it is determined that an event has been detected (step S14; Yes), the process proceeds to step S15. On the other hand, if it is determined that an event has not been detected (step S14; No), the process proceeds to step S16.

[0048] If it is determined as Yes in step S14, the control unit 100 stores the photographed data for a period longer than the normal period as event record data (step S15). Specifically, the recording control unit 123 stores the photographed data for a period longer than the normal period as event record data in the recording unit 20. A method for storing photographed data for a period longer than the normal period will be described with reference to Figs. 5, 6, 7, and 8.

[0049] 5, when the event detection unit 127 detects an event at timing t0, the recording control unit 123 stores the loop recorded data for the period from (t0-t2) to (t0+t2) before and after the event as event recorded data in the recording unit 20. The time t2 is longer than the time t1 when saving the event recorded data for a normal period, and is, for example, 120 seconds. In this case, the recording control unit 123 stores the captured data for 120 seconds before and after the timing t0 when the event detection unit 127 detects the event as event recorded data ID2 in the recording unit 20.

[0050] As shown in FIG. 6, in the event record data, the times before and after the timing t0 at which the event is detected may be different. For example, when the recording control unit 123 detects a car break-in as an event, the recording control unit 123 may store the event record data in the recording unit 20 so that the time before the event detection, which is a period during which a pre-event inspection may be performed if the detected event is a car break-in, is longer than the time after the event detection. When the event detection unit 127 detects an event at timing t0, the recording control unit 123 stores the loop record data of the period from (t0-t3) to (t0+t4) before and after the event as event record data in the recording unit 20. The time t3 is, for example, 120 seconds. The time t4 is, for example, 30 seconds. In this case, the recording control unit 123 stores the captured data of the 120 seconds before and the 30 seconds after the timing t0 at which the event detection unit 127 detects the event as event record data ID3 in the recording unit 20.

[0051] 7, the recording control unit 123 sets an overwrite prohibition flag F, which indicates prohibition of overwriting, to the filed photographed data, thereby saving the photographed data as event recording data. For example, when the event detection unit 127 detects an event at timing t0, the recording control unit 123 sets an overwrite prohibition flag F to four data files, photographed data D2, photographed data D3, and photographed data D5, in addition to photographed data D4 including timing t0, thereby saving photographed data D2 to D5 as event recording data. The overwrite prohibition flag F may also be set so that the time before the event is detected is longer than the time after the event is detected.

[0052] In FIG. 8, when the event detection unit 127 detects an event at timing t0, the recording control unit 123 stores the loop recording data of the period from (t0-t5) to (t0+t5) before and after the event in the recording unit 20 as event recording data. There is no particular limitation on the time t5, but it may be the same time as the time t1 when saving the event recording data of the normal period. That is, the time t5 may be, for example, 30 seconds. In this case, the recording control unit 123 stores the shooting data of 30 seconds before and after the timing t0 when the event detection unit 127 detects the event in the recording unit 20 as the event recording data ID4. In the case of the example shown in FIG. 8, the recording control unit 123 sets the overwrite prohibition flag F for the shooting data D2 and the shooting data D3 immediately before the event recording data ID4, thereby saving the shooting data D2 and the shooting data D3 as event recording data in addition to the event recording data ID4. As a result, the overwrite prohibition flag F is set so that the time before the event is detected is longer than the time after the event is detected, so that photographed data from a long period before an event such as a car break-in is detected can be saved as event recording data.

[0053] Referring again to FIG. 2, the control unit 100 determines whether or not parking monitoring has ended (step S16). The process of step S16 is the same as the process of step S13, and therefore a description thereof will be omitted. If it is determined that parking monitoring has ended (step S16; Yes), the process of FIG. 2 ends. On the other hand, if it is determined that parking monitoring has not ended (step S16; No), the process proceeds to step S14.

[0054] As described above, the first embodiment changes the time for recording the photographed data depending on whether the parking position of the vehicle is a position where an unexpected event is likely to occur, specifically, whether the parking position is a position where the vehicle is parked for a short time. In the first embodiment, when an event is detected at a position where the vehicle is parked for a short time, the photographed data for a normal period is stored as event record data. In the first embodiment, when an event is detected at a position where the vehicle is parked for a long time, the photographed data for a period longer than the normal period is stored as event record data. In this way, in the first embodiment, when the detected event is a car break-in that is not an unexpected event, the photographed data including a period when a reconnaissance inspection may have been performed can be stored as event record data, so that parking monitoring can be performed appropriately.

[0055] [Processing of the second embodiment] The processing of the recording control device according to the second embodiment will be described with reference to Fig. 9. Fig. 9 is a flow chart showing an example of the processing flow of the recording control device according to the second embodiment. The configuration of the recording control device according to the second embodiment is the same as that of the recording control device according to the first embodiment, so a description thereof will be omitted.

[0056] The processes from step S21 to step S26 are the same as the processes from step S11 to step S16 shown in Fig. 2, respectively, and therefore will not be described. The process shown in Fig. 9 differs from the process shown in Fig. 2 in the process of determining the parking conditions of the vehicle.

[0057] When parking monitoring is started, the control unit 100 judges whether the parking time of the vehicle is a time period in which an unexpected event is likely to occur. As an example of whether the parking time is a time period in which an unexpected event is likely to occur, it judges whether it is nighttime or not (step S20). Specifically, the parking condition detection unit 130 judges whether the parking time is nighttime or not based on the current time. The parking condition detection unit 130 may have a function to measure the current time, or may obtain the current time from an external source. If it is judged that the parking position is not nighttime (step S20; No), the process proceeds to step S21. On the other hand, if it is judged that the parking time is nighttime (step S20; Yes), the process proceeds to step S24.

[0058] As described above, the second embodiment changes the time for saving the photographed data as event record data depending on whether the parking time is at night or not. In the second embodiment, when an event is detected while the vehicle is parked during the day, the photographed data for the normal period is saved as event record data. In the second embodiment, when an event is detected while the vehicle is parked at night, the photographed data for a period longer than the normal period is saved as event record data. In this way, in the second embodiment, when the detected event is a car break-in that is not a sudden event, the photographed data including the period during which a reconnaissance inspection may have been conducted can be saved as event record data, and parking monitoring can be performed appropriately.

[0059] [Processing of the third embodiment] The processing of the recording control device according to the third embodiment will be described with reference to Fig. 10. Fig. 10 is a flow chart showing an example of the processing flow of the recording control device according to the third embodiment. The configuration of the recording control device according to the third embodiment is the same as that of the recording control device according to the first embodiment, so a description thereof will be omitted.

[0060] The processes from step S31 to step S36 are the same as the processes from step S11 to step S16 shown in Fig. 2, respectively, and therefore will not be described. The process shown in Fig. 10 differs from the process shown in Fig. 2 in the process of determining the parking conditions of the vehicle.

[0061] When parking monitoring is started, the control unit 100 judges whether or not the luminance around the parking position of the vehicle is such that an unexpected event is likely to occur. As an example of whether or not the luminance is such that an unexpected event is likely to occur, it judges whether or not the luminance is a predetermined value or more (step S30). Specifically, the parking condition detection unit 130 detects whether or not the luminance around the parking position is a predetermined value or more based on the detection result of the luminance by a luminance sensor that detects the surrounding brightness provided in the vehicle. If it is judged that the luminance of the surroundings is a predetermined value or more (step S30; Yes), the process proceeds to step S31. On the other hand, if it is judged that the luminance of the surroundings is not a predetermined value or more (step S30; No), the process proceeds to step S34.

[0062] As described above, the third embodiment changes the time for recording the photographed data depending on whether the brightness around the parking position of the vehicle is a brightness at which an unexpected event is likely to occur, specifically, whether the brightness around the parking position of the vehicle is a predetermined brightness or more. In the third embodiment, when an event is detected when the vehicle is parked in a position with a predetermined brightness or more, photographed data for a normal period is stored as event recording data. In the third embodiment, when an event is detected when the vehicle is parked in a position with a brightness less than a predetermined brightness, photographed data for a period longer than the normal period is stored as event recording data. In this way, in the third embodiment, when the detected event is a car break-in that is not an unexpected event, photographed data including a period during which a reconnaissance inspection may have been performed can be stored as event recording data, so that parking monitoring can be performed appropriately.

[0063] Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited by the contents of these embodiments. Furthermore, the above-mentioned components include those that a person skilled in the art can easily imagine, those that are substantially the same, and those that are within the so-called equivalent range. Furthermore, the above-mentioned components can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the gist of the above-mentioned embodiments. [Explanation of symbols]

[0064] 1 Recording device 10. Imaging unit 20 Recording Section 30 Control section 40 Display section 50 Sensors 60 GNSS signal receiver 70 CAN interface section 100 Control unit (recording control device) 110 Bus 120 Shooting data acquisition unit 121 Buffer Memory 122 Shooting data processing section 123 Recording control section 124 Playback control section 125 Operation control section 126 Display control section 127 Event detection unit 128 Location information acquisition unit 129 Parking detection unit 130 Parking condition detection unit

Claims

1. an image capturing data acquiring unit that acquires image capturing data captured by a camera installed in the vehicle; a parking detection unit that detects that the vehicle is parked; A parking condition detection unit that detects parking conditions of the vehicle; an event detection unit that detects an event for the vehicle; A recording control unit that changes a time length of the photographed data to be stored when the event detection unit detects an event based on the parking conditions detected by the parking condition detection unit, and stores the photographed data with the changed time length; A recording control device comprising:

2. The parking condition detection unit detects whether the parking conditions of the vehicle are conditions in which an unexpected event is likely to occur or conditions in which a planned event is likely to occur, The recording control unit extends the time length of the photographed data to be stored when the parking conditions of the vehicle are conditions in which a planned event is likely to occur, compared with a case in which the parking conditions are conditions in which an unexpected event is likely to occur. The recording control device according to claim 1 .

3. The parking condition detection unit detects that a parking position, which is a parking condition of the vehicle, is a parking position where the vehicle is parked for a short period of time as a condition where an unexpected event is likely to occur, and detects that a parking position, which is a parking condition of the vehicle, is a parking position where the vehicle is parked for a long period of time as a condition where a planned event is likely to occur. The recording control device according to claim 2 .

4. The parking condition detection unit detects that a parking time, which is a parking condition of the vehicle, is daytime as a condition under which an unexpected event is likely to occur, and detects that a parking time, which is a parking condition of the vehicle, is nighttime as a condition under which a planned event is likely to occur.

4. The recording control device according to claim 2 or 3.

5. the recording control unit changes the length of the period before the event detection time point to a longer period; The recording control device according to claim 1 .

6. A photographing data acquisition step of acquiring photographing data photographed by a camera installed in the vehicle; a parking detection step of detecting that the vehicle is parked; a parking condition detection step of detecting a parking condition of the vehicle; an event detection step of detecting an event for the vehicle; a recording control step of changing a time length of the photographed data to be stored when an event is detected in the event detection step based on the parking condition detected in the parking condition detection step, and storing the photographed data with the changed time length; The recording control method is executed by a recording control device.

7. A computer operating as a recording control device A photographing data acquisition step of acquiring photographing data photographed by a camera installed in the vehicle; a parking detection step of detecting that the vehicle is parked; a parking condition detection step of detecting a parking condition of the vehicle; an event detection step of detecting an event for the vehicle; a recording control step of changing a time length of the photographed data to be stored when an event is detected in the event detection step based on the parking condition detected in the parking condition detection step, and storing the photographed data with the changed time length; A program that executes the following.

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