JP5126473B2 - Image data recording system and integrated circuit device - Google Patents

Description

  The present invention relates to an image data recording system and an integrated circuit device.

  In order to acquire image data at the time of an accident of a moving body such as a car, a drive recorder mounted on the moving body is known.

  As a drive recorder technique, a technique is known in which the occurrence of an accident is detected by a vibration detection sensor that detects vibration and recording of image data is started.

Also, as a drive recorder technology, a plurality of image data acquired in time series by the imaging unit is sequentially stored in the primary storage unit, and is acquired during a predetermined period before the accident when an accident is detected. A technique for storing image data stored in a primary storage unit in a secondary storage unit is known. According to this, since the image data acquired in the predetermined period before the accident can be stored in the secondary storage unit, the progress of the accident can be clarified.
JP-A-6-331351

  When detecting that an accident has occurred due to vibration and then storing the image data stored in the primary storage unit in the secondary storage unit, if the drive recorder is destroyed due to the impact of the accident, There is a possibility that the image data stored in the primary storage unit cannot be stored in the secondary storage unit. In particular, the primary storage unit preferably uses a memory element having a short writing time (high writing speed) and a large number of rewrites due to its nature. In many cases, a volatile memory element is used as the primary storage unit. When a volatile memory element is used as the primary storage unit, the drive recorder is destroyed by the impact of an accident, and the image data stored in the primary storage unit cannot be stored in the secondary storage unit. If a situation occurs, the image data stored in the primary storage unit may disappear, and the image data at the time of the accident may not be saved.

  An object of the present invention is to provide an image data recording system and an integrated circuit device capable of reliably storing necessary image data.

(1) An image data recording system according to the present invention comprises:
An image data recording system mounted on a moving body,
Detecting that an image data recording event has occurred based on distance information between the moving object and an object existing in a predetermined area around the moving object and relative speed information between the moving object and the object An image data recording event occurrence detection unit;
An image data recording control unit that starts a process of storing image data acquired by an imaging unit provided in the moving body in a storage unit when the image data recording event occurs;
including.

  According to the image data recording system of the present invention, it is detected that an image data recording event has occurred based on the image data (first and second image data), and a process of recording the image data in the storage unit is started. . That is, according to the image data recording system of the present invention, it is possible to predict the occurrence of an accident and start the process of recording image data before the accident occurs.

  According to this, since the image data indicating the image taken before the accident occurs can be written in the storage unit in real time, even if a failure occurs in the image data recording system due to the impact of the accident, Image data immediately before the accident can be stored in the storage unit.

  If a non-volatile memory element is used as the storage unit, the stored image data can be saved even if a failure occurs in the image data recording system due to the impact of the accident. It becomes possible to securely store the image data acquired during the period.

  That is, according to the present invention, it is possible to provide an image data recording system capable of reliably storing image data acquired in a predetermined period before the occurrence of an accident.

  According to the present invention, even when an accident does not actually occur, image data is recorded when the risk of the accident increases. Therefore, it is possible to give the user an opportunity to check his / her driving situation.

(2) In this image data recording system,
An image data recording event end detection unit for detecting that the image data recording event has ended,
The image data recording control unit
When the image data recording event ends, the processing for storing the image data in the storage unit may be stopped.

  According to this, when the risk of occurrence of an accident is avoided, the process of storing the image data in the storage unit can be terminated. Therefore, image data can be stored in the storage unit without pressing the storage capacity of the storage unit.

(3) In this image data recording system,
The image data recording event occurrence detection unit,
The distance information and the relative velocity information are acquired based on first and second image data obtained by imaging an area including the object by first and second imaging units that capture an image having parallax. May be.

  Thereby, the distance information between the moving body and the object and the relative speed information between the moving body and the object can be accurately acquired. In the present invention, processing for detecting that an image data recording event has occurred may be performed based on image data acquired by three or more imaging units.

  In the present invention, for example, the image data recording event occurrence detection unit may include a distance information generation unit that generates distance information and a relative speed information generation unit that generates relative speed information. The distance information generation unit and the relative speed information generation unit may generate distance information and relative speed information based on the first and second image data.

  Note that the first and second imaging units may be imaging units that acquire image data stored in the storage unit. That is, in the present invention, image data acquired by the first and second imaging units (imaging units used for detecting occurrence of an image data recording event) may be stored in the storage unit. However, as a modification, the image data recording system may include an imaging unit for acquiring image data to be stored in the storage unit, in addition to the imaging unit for detecting occurrence of an image data recording event.

(4) In this image data recording system,
The first and second image data is image data indicating an image of a target region of an image data recording event occurrence detection process that is a part of a region captured by the first and second imaging units,
The image processing apparatus may further include a target area determination unit that determines a target area for the image data recording event occurrence detection process.

  As a result, image data suitable for the image data recording event occurrence detection process can be acquired.

(5) In this image data recording system,
The target area determination unit
A target area for the image data recording event occurrence detection process may be determined based on the speed information of the moving body.

(6) In this image data recording system,
The target area determination unit
A target area for the image data recording event occurrence detection process may be determined based on the width information of the moving body.

(7) In this image data recording system,
The target area determination unit
The target area for the image data recording event occurrence detection process may be determined based on road width information during movement of the moving body.

(8) In this image data recording system,
An imaging range control unit that controls imaging ranges of the first and second imaging units may be further included.

  As a result, image data suitable for the image data recording event occurrence detection process can be acquired.

(9) In this image data recording system,
The imaging range controller is
The imaging range may be controlled based on speed information of the moving body.

(10) In this image data recording system,
The imaging range controller is
The imaging range may be controlled based on the width information of the moving body.

(11) In this image data recording system,
The imaging range controller is
The imaging range may be controlled based on road width information during movement of the moving body.

(12) In this image data recording system,
An imaging direction control unit that controls the orientations of the first and second imaging units based on traveling direction information indicating the traveling direction of the moving body may be further included.

  As a result, image data suitable for the image data recording event occurrence detection process can be acquired.

(13) In this image data recording system,
The image data recording event occurrence detection unit,
The distance information and the relative velocity information may be acquired based on a signal from an objective distance sensor provided in the moving body.

  In the present invention, for example, distance information between the moving body and the object and relative speed information between the moving body and the object may be acquired using an objective distance sensor. Then, it may be detected that an image data recording event has occurred based on the distance information and the relative speed information.

(14) In this image data recording system,
A sensing range control unit that controls a sensing range of the objective objective distance sensor may be further included.

  As a result, image data suitable for the image data recording event occurrence detection process can be acquired.

(15) In this image data recording system,
The sensing range control unit
The sensing range may be controlled based on speed information of the moving body.

(16) In this image data recording system,
The sensing range control unit
The sensing range may be controlled based on the width information of the moving body.

(17) In this image data recording system,
The sensing range control unit
The sensing range may be controlled based on road width information during movement of the moving body.

(18) In this image data recording system,
An orientation control unit that controls the orientation of the objective distance sensor based on traveling direction information indicating the traveling direction of the moving body may be further included.

  As a result, image data suitable for the image data recording event occurrence detection process can be acquired.

(19) In this image data recording system,
You may further include the notification process part which notifies a user that the said image data was memorize | stored in the said memory | storage part.

  According to this, the user can perceive that the image data recording system has detected a danger, and the user can be given an opportunity to reflect on his / her driving. In addition, it is possible to prompt the user to organize the storage unit.

(20) An integrated circuit device according to the present invention includes:
An integrated circuit device for an image data recording device mounted on a moving body,
Detecting that an image data recording event has occurred based on distance information between the moving object and an object existing in a predetermined area around the moving object and relative speed information between the moving object and the object An image data recording event occurrence detection unit;
An image data recording control unit that starts a process of storing image data acquired by an imaging unit provided in the moving body in a storage unit when the image data recording event occurs;
including.

  According to the integrated circuit device of the present invention, it is detected that an image data recording event has occurred based on the image data (first and second image data), and processing for recording the image data in the storage unit is started. That is, according to the integrated circuit device of the present invention, it is possible to predict the occurrence of an accident and start the process of recording image data before the accident occurs.

  According to this, since the image data indicating the image taken before the accident occurs can be written in the storage unit in real time, even if a failure occurs in the image data recording system due to the impact of the accident, Image data immediately before the accident can be stored in the storage unit.

  If a non-volatile memory element is used as the storage unit, the stored image data can be saved even if a failure occurs in the image data recording system due to the impact of the accident. It becomes possible to securely store the image data acquired during the period.

  That is, according to the present invention, it is possible to provide an integrated circuit device capable of reliably storing image data acquired in a predetermined period before the occurrence of an accident.

  Embodiments to which the present invention is applied will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments. The present invention includes any combination of the following embodiments and modifications.

(First embodiment)
Hereinafter, an image data recording system 1 according to a first embodiment to which the present invention is applied will be described. 1 to 5 are diagrams for explaining the image data recording system 1. FIG. 1 is a diagram for explaining the outline of the image data recording system 1 according to the present embodiment. As shown in FIG. 1, the image data recording system 1 is a system mounted on a moving body 2 such as a car. The image data recording system 1 may be configured as a drive recorder system mounted on an automobile.

  The image data recording system 1 according to the present embodiment includes an image data recording event occurrence detection unit 10 shown in FIGS. The image data recording event occurrence detection unit 10 detects that an image data recording event has occurred based on the first and second image data acquired via the first and second camera interfaces 12 and 14. Process. The first and second camera interfaces 12 and 14 are interfaces for receiving the first and second image data acquired by the first and second imaging units 16 and 18, respectively.

  In the present embodiment, the first and second imaging units 16 and 18 are set (arranged) so as to capture an image having parallax. For example, the first and second imaging units 16 and 18 may be arranged adjacent to each other so that the optical axes of the optical systems face the same direction (in parallel). As a result, the images captured by the first and second imaging units 16 and 18 are images having parallax, and the first and second image data are image data indicating images having parallax. Note that the first and second imaging units 16 and 18 may be provided in the moving body 2.

  The first and second imaging units 16 and 18 include, for example, a light receiving element that converts incident light into an electrical signal and an optical system that makes light incident on the light receiving element (for example, an optical element such as a lens or a mirror). An optical system) and a processing unit that performs predetermined processing on the electrical signal output from the light receiving element.

  The first and second imaging units 16 and 18 may be configured to acquire a plurality of image data along a time series. For example, the first and second imaging units 16 and 18 may be configured to acquire image data at a rate of 30 frames per second.

  The image data recording event occurrence detection unit 10 includes a distance information acquisition unit 20 as shown in FIG. The distance information acquisition unit 20 acquires distance information indicating the distance between the moving body 2 and the object 3 existing in a predetermined area around the moving body 2 (in the target area of the image data recording event occurrence detection process).

  In the present embodiment, the distance information acquisition unit 20 acquires distance information indicating the distance between the moving body 2 and the object 3 based on the first and second image data. As described above, the first and second image data is image data indicating an image with parallax. From this, it becomes possible to generate distance information indicating the distance between the moving body 2 and the object 3 based on the first and second image data. The method for generating the distance information based on the first and second image data is not particularly limited, and any known method (image processing method) may be applied.

  As shown in FIG. 1, the object 3 is an article existing in a predetermined area around the moving body 2 (in an area subject to image data recording event occurrence detection processing). , Motorcycles, motorcycles, etc. that are premised on movement, and those that are not premised on movement, such as walls, guardrails, and obstacles on the road. The object 3 may be a person or other animal.

  The image data recording event occurrence detection unit 10 includes a relative speed information acquisition unit 30. The relative speed information acquisition unit 30 acquires relative speed information indicating the relative speed between the moving body 2 and the object 3. The relative speed information acquisition unit 30 acquires the relative speed information as information (vector information) including size information and direction information. That is, the relative speed information may include relative speed magnitude information and relative speed direction information.

  In the present embodiment, the relative speed information acquisition unit 30 performs a process of generating relative speed information based on the first and second image data acquired by the first and second imaging units 16 and 18. May be. For example, the relative speed information acquisition unit 30 includes the position information of the object 3 at a predetermined time T1 (relative position information based on the position of the moving body 2) and the object 3 at a time T2 when a predetermined time has elapsed from the time T1. The relative velocity information between the moving body 2 and the object 3 may be generated based on the position information (relative position information with respect to the position of the moving body 2). For example, it is possible to generate relative velocity information between the moving body 2 and the object 3 by comparing the position information of the object 3 before and after a predetermined time elapses (by extracting the difference value of the image data). become. Note that the method of acquiring the position information of the object 3 based on the image data is not particularly limited, and any known method may be applied. By acquiring image data indicating an image having parallax as the first and second image data, the position information of the object 3 can be acquired from the first and second image data.

  The image data recording event occurrence detection unit 10 detects that a predetermined image data recording event has occurred. In the present embodiment, the image data recording event occurrence detection unit 10 generates an image data recording event based on distance information between the moving body 2 and the object 3 and relative speed information between the moving body 2 and the object 3. Detect that

  The image data recording event occurrence detection unit 10 determines that the relative speed of the object 3 faces the moving body 2 (there is a danger of a collision) and the time required for the collision between the moving body 2 and the object 3 is a predetermined time. It may be detected that an image data recording event has occurred when the time is below. As described above, the relative speed information acquisition unit 30 acquires the relative speed information between the moving body 2 and the object 3 as information including orientation information and size information. Therefore, it is possible to determine whether or not the object 3 is moving toward the moving body 2 based on the relative speed information (relative speed direction information), and there is a risk of collision between the moving body 2 and the object 3. Can be determined. Further, based on the relative speed information (relative speed magnitude information) and the distance information between the moving body 2 and the object 3, the time required for the collision can be derived. When the relative speed of the object 3 is directed toward the moving body 2 and the time required for the collision between the moving body 2 and the object 3 is equal to or shorter than a predetermined time, the moving body 2 is in a dangerous state ( It may be determined that an image data recording event has occurred as a risk of collision with the object 3).

  Note that the image data recording event occurrence detection unit 10 may detect that an image data recording event has occurred based on information other than the distance information and the relative speed information. For example, the image data recording event occurrence detection unit 10 may detect that an image data recording event has occurred based on a signal from a vibration detection sensor (such as a speed sensor or an acceleration sensor) provided in the moving body 2. . That is, it may be determined that an image data recording event has occurred by detecting that a predetermined event (collision accident or sudden braking) has occurred in the moving body 2 based on a signal from the vibration detection sensor.

  In the present embodiment, the image data recording event occurrence detection unit 10 may be configured by dedicated hardware. However, as a modification, the image data recording event occurrence detection unit 10 may be realized by causing a microcomputer or the like including a CPU or MPU to execute a predetermined program.

  The image data recording system 1 according to the present embodiment includes an image data recording control unit 40. When an image data recording event occurs, the image data recording control unit 40 starts processing to store the image data acquired by the imaging unit in the storage unit 42 illustrated in FIG. The image data recording control unit 40 may receive a detection signal from the image data recording event occurrence detection unit 10 and start processing for storing the image data in the storage unit 42. Note that the image data recording control unit 40 may be realized by causing the CPU 45 shown in FIG. 3 to execute a predetermined program.

  In the image data recording system 1 according to the present embodiment, the image data to be stored in the storage unit 42 is the first image data acquired by the first imaging unit 16 and the first image data acquired by the second imaging unit 18. Either one of the two image data or both of them may be used. That is, in the present embodiment, image data used for determining whether or not an event has occurred may be stored in the storage unit 42. However, as a modified example, image data acquired by an imaging unit different from the first and second imaging units 16 and 18, that is, image data that is not used for determining whether or not an event has occurred is stored in the storage unit 42. You may let them.

  Note that the storage unit 42 applicable to the image data recording system 1 according to the present embodiment is not particularly limited, and any known storage device can be applied. In the present embodiment, a nonvolatile memory (nonvolatile semiconductor memory) may be applied as the storage unit 42.

  The image data recording system 1 according to the present embodiment may further include a storage unit 44 as shown in FIG. A plurality of image data acquired (captured) in time series are sequentially written and stored in the storage unit 44. The storage unit 44 may be configured as a so-called ring buffer. As a result, a fixed amount of image data can always be stored in the storage unit 44.

  When no image data recording event occurs, the image data recording control unit 40 may perform a process of sequentially writing a plurality of image data acquired (captured) in time series in the storage unit 44.

  When the image data recording event occurrence detection unit 10 detects the occurrence of the image data recording event, the image data recording control unit 40 is acquired in a predetermined period before the event occurs and stored in the storage unit 44. The image data may be stored in the storage unit 42. According to this, when an event such as an accident occurs, image data acquired before the occurrence of the event can be stored in the storage unit 42. In the present embodiment, the storage unit 44 may be referred to as a primary storage unit, and the storage unit 42 may be referred to as a secondary storage unit.

  The image data recording system 1 according to the present embodiment may include an image data recording event end detection unit. The image data recording event end detection unit detects that the image data recording event has ended. The image data recording event end detection unit may be realized by the image data recording event occurrence detection unit 10.

  The image data recording event end detection unit may detect that the image data recording event has ended based on the relative speed information between the moving body 2 and the object 3. For example, the image data recording event end detection unit may determine that the image data recording event has ended when the direction of the relative speed of the object 3 deviates from the moving body 2. Alternatively, the image data recording event end detection unit may determine that the image data recording event has ended when the magnitude of the relative speed of the object 3 becomes smaller than a predetermined size.

  Then, the image data recording control unit 40 stops the process of storing the image data in the storage unit 42 when the image data recording event end detection unit detects the end of the image data recording event. The image data recording control unit 40 may start processing for storing the image data in the storage unit 44 when the image data recording event end detection unit detects the end of the image data recording event.

  The image data recording system 1 according to the present embodiment includes an imaging direction control unit 60 as shown in FIG. The imaging direction control unit 60 controls the orientation of the first and second imaging units 16 and 18. The imaging direction control unit 60 may control the orientations of the first and second imaging units 16 and 18 based on the traveling direction information of the moving body 2. The traveling direction information of the moving body 2 may be acquired based on, for example, rotation angle information of the handle of the moving body 2. The first and second imaging units 16 and 18 can be directed in the traveling direction of the moving body 2 by the imaging direction control unit 60. Therefore, the occurrence of an image data recording event can be detected efficiently, and the detection rate of the occurrence of an image data recording event can be increased.

  As shown in FIGS. 2 and 3, the image data recording system 1 according to the present embodiment further includes a notification processing unit 70 that performs processing for notifying the user that image data has been stored in the storage unit 42. May be. The notification processing unit 70 may perform processing for displaying a notification image on a display unit (not shown). Alternatively, the notification processing unit 70 may perform processing for causing a light emitting device such as a light emitting diode to emit light. Or the notification process part 70 may perform the process for making a speaker utter a predetermined audio | voice. The notification processing unit 70 allows the user to perceive that image data is recorded in the storage unit 42. As a modification, the notification processing unit is configured to perform processing for notifying the user that the amount of image data stored in the storage unit 42 has exceeded a predetermined value. Also good. The notification processing unit 70 may be realized by dedicated hardware or may be realized by causing a CPU to execute a predetermined program.

  In the present embodiment, the image data recording event occurrence detection unit 10, the storage unit 44, the CPU 45, the interface 46 (first and second camera interfaces 12, 14), and the notification processing unit 70 are provided as one integrated circuit device. 4 may be configured. The storage unit 42 may be a storage device provided outside the integrated circuit device 4. The storage unit 42 may be a storage device configured to be detachable.

  The image data recording system 1 according to the present embodiment may be configured as described above. Next, the operation of the image data recording system 1 will be described with reference to FIGS.

  The image data recording system 1 first determines whether or not an image data recording event has occurred (step S10), and stores the image data when the image data recording event has occurred (in the case of Yes in step S10). The process of storing in the unit 42 is started. Specifically, the image data for recording is acquired (step S12), and the acquired image data is stored in the storage unit 42 (step S14). Note that the process of storing the image data in the storage unit 42 is repeated until the image data recording event ends (Yes in step S16).

  If no image data recording event has occurred (No in step S10), the image data is stored in the storage unit 44. Specifically, the image data is acquired (step S18), and the acquired image data is stored in the storage unit 44 (step S20). The process of storing the image data in the storage unit 44 is repeated until an image data recording event occurs (Yes in step S10). However, as a modification, when the image data recording event has not occurred, the process of storing the image data in the storage unit 44 may not be performed.

  Next, a specific procedure for determining whether or not an image data recording event has occurred (step S10) will be described with reference to FIG.

  First, the image data recording system 1 acquires image data (first and second image data) (step S30).

  And based on the 1st and 2nd image data, the process which produces | generates the distance information of the mobile body 2 and the object 3, and the process which produces | generates the relative velocity information of the mobile body 2 and the object 3 are performed (step). S32).

  Then, based on the generated distance information and relative speed information, it is determined whether or not an image data recording event has occurred (step S34).

  If the distance information and the relative speed information satisfy the predetermined condition (Yes in step S34), it is determined that an image data recording event has occurred (step S36).

  Conversely, if the distance information and the relative speed information do not satisfy the predetermined condition (No in step S34), it is determined that no image data recording event has occurred (the image data recording event has ended). (Step S38).

  Next, functions and effects achieved by the image data recording system 1 according to the present embodiment will be described.

  According to this image data recording system 1, as described above, it is detected that an image data recording event has occurred based on the image data (first and second image data), and the image data is stored in the storage unit 42. Start the recording process. That is, according to the image data recording system 1, it is possible to predict the occurrence of an accident and start the process of recording image data before the accident occurs. According to this, since the image data indicating the image taken before the accident occurs can be written in the storage unit 42 in real time, even if a failure occurs in the image data recording system 1 due to the impact of the accident, the accident The previous image data (immediately before the accident) can be stored in the storage unit 42. If a non-volatile memory is used as the storage unit 42, the image data acquired in a predetermined period before the accident can be stored even when the supply of power to the storage unit 42 is stopped. That is, according to the image data recording system 1, when an accident occurs in the moving body 2, the image data acquired in a predetermined period before the accident can be reliably stored.

  Further, in the image data recording system 1, if the moving body 2 and the object 3 satisfy a predetermined relationship, recording of image data is started even if an accident does not occur. That is, according to the image data recording system 1, even when an accident does not occur, it is possible to detect the risk of collision between the moving body 2 and the object 3 and store the image data. Therefore, the risk of driving by the user can be determined based on the image data stored in the storage unit 42. That is, the image data recording system 1 can be used as a driving skill determination system that determines a user's driving skill.

  When the image data recording system 1 includes an image data recording event end detection unit, when the image data recording event ends, the process of storing the image data in the storage unit 42 ends. Therefore, only the image acquired when the danger is detected can be stored in the storage unit 42.

  Further, when the image data recording system 1 includes the notification processing unit 70, it can be notified that the image data is stored in the storage unit 42. Therefore, it is possible to provide the image data recording system 1 that can easily detect that an accident has occurred.

(Second Embodiment)
Hereinafter, an image data recording system 5 according to a second embodiment to which the present invention is applied will be described. 6 to 9 are diagrams for explaining the image data recording system 5 according to the present embodiment.

  In the image data recording system 5 according to the present embodiment, images of a part of the imaging area (target area 100 for the image data recording event occurrence detection process) captured by the first and second imaging units 16 and 18 are captured. Based on the indicated image data, processing for detecting the occurrence of an image data recording event is performed. In other words, in the present embodiment, the first and second image data to be subjected to the image data recording event occurrence detection process are a part of the area captured by the first and second imaging units 16 and 18. It is the image data shown. According to this, since the amount of data processed by the image data recording system 1 can be reduced, the image data recording event occurrence detection processing can be performed efficiently.

  The image data recording system 5 according to the present embodiment includes a target area determining unit 80 as shown in FIG. The target area determination unit 80 determines a target area 100 (area indicated by the first and second image data) of the image data recording event occurrence detection process from the imaging areas of the first and second imaging units 16 and 18. To do.

  In the present embodiment, the target area determination unit 80 may determine the target area 100 of the image data recording event occurrence detection process based on the speed information of the moving body 2. The speed information of the moving body 2 can be acquired, for example, by receiving a vehicle speed pulse by the speed information acquisition unit 82.

  When the speed of the moving body 2 changes, the existence range of the object 3 that is at risk of collision for the moving body 2 changes. Specifically, the higher the speed of the moving body 2, the more the object 3 that is located far from the moving body 2 in the traveling direction of the moving body 2 can cause an accident. That is, as the speed of the moving body 2 increases, the existence range of the object 3 that can cause an accident becomes wider in the traveling direction of the moving body 2. On the other hand, the higher the speed of the moving body 2, the lower the probability that the object 3 present at a position far from the moving body 2 will cause an accident based on the width direction of the moving body 2. That is, as the speed of the moving body 2 increases, the existence range of the object 3 that can cause an accident becomes narrower in the width direction of the moving body 2. That is, the optimum range to be subjected to the image data recording event occurrence detection process changes according to the speed of the moving body 2.

  Therefore, image data suitable for the image data recording event occurrence detection process can be acquired by determining the target area 100 for the image data recording event occurrence detection process based on the speed information of the moving body 2. Specifically, as shown in FIGS. 7A and 7B, an image data recording event is set by setting a target area for image data recording event occurrence detection processing in accordance with the moving speed of the moving body 2. The occurrence detection process can be performed accurately and efficiently. FIG. 7A is a diagram showing the target area 101 of the image data recording event occurrence detection process when the moving body 2 is moving at the first speed, and FIG. It is a figure which shows the object area | region 102 of an image data recording event generation | occurrence | production detection process when 2 is moving at 2nd speed slower than 1st speed. The target area 101 illustrated in FIG. 7A is narrower in the width direction and wider in the height direction than the target area 102 illustrated in FIG. Thereby, an image data recording event occurrence detection process suitable for the moving speed of the moving body 2 can be performed.

(First modification)
As a modification of the present embodiment, the target area determination unit 80 may determine the target area 100 for the image data recording event occurrence detection process based on road information on which the moving body 2 is moving. For example, the target area determination unit 80 may determine the target area 100 of the image data recording event occurrence detection process based on the road width information of the road on which the moving body 2 is moving.

  The target area determination unit 80 may acquire road width information based on image data acquired by the first and second imaging units 16 and 18.

  For example, as shown in FIG. 8 (A), when the moving body 2 is moving on a narrow road, as shown in FIGS. 8 (B) and 8 (C), the first and second imaging units 16, The image captured at 18 may include partitions such as 塀 (塀 103 to 塀 106). At this time, since the width of the road on which the moving body 2 is moving is understood to be an area surrounded by the ridges 103 to 106, the first and second imaging units 16 and 18 acquired by the first and second imaging units 16 and 18 are used. Based on the second image data, it is possible to acquire road width information while the moving body 2 is moving. Then, by determining the target area 100 of the image data recording event occurrence detection process based on the road width information of the road on which the moving body 2 is moving, the image data recording event occurrence detection process suitable for the moving body 2 becomes possible. .

  Alternatively, as illustrated in FIG. 9, when the moving body 2 is moving on a road with a line defining a lane, the image captured by the first and second imaging units 16 and 18 includes the line. It is. Since the width of the road on which the moving body 2 is moving is an area sandwiched between lines drawn on the road, the road is moved based on the image data acquired by the first and second imaging units 16 and 18. The road width information while the body 2 is moving can be acquired.

  However, the target area determination unit 80 may acquire road width information without using image data. For example, the target area determination unit 80 may acquire road width information based on the position information of the mobile body 2 and road information. That is, the target area determination unit 80 may acquire the width information of the road on which the moving body 2 is moving based on the road information including the road width of the road and the position information indicating the current position of the moving body 2. . In addition, the positional information on the mobile body 2 can be acquired using, for example, GPS. Moreover, you may acquire road information using the map information mounted in the car navigation system.

(Second modification)
As a second modification of the present embodiment, the target area determination unit 80 sets the target area 100 for the image data recording event occurrence detection process based on the width information (vehicle width information) of the moving body 2. Good. By determining the target area 100 of the image data recording event occurrence detection process based on the width information indicating the width of the moving object 2, the image data recording event occurrence detection process suitable for the moving object 2 can be performed.

(Third embodiment)
Hereinafter, an image data recording system 6 according to a third embodiment to which the present invention is applied will be described. 10 and 11 are diagrams for explaining the image data recording system 6 according to the present embodiment.

  The image data recording system 6 according to the present embodiment includes an imaging range control unit 90 as shown in FIG. As shown in FIG. 11, the imaging range control unit 90 controls the imaging ranges (processing ranges) of the first and second imaging units 16 and 18. That is, in the present embodiment, the first and second imaging units 16 and 18 capture only a part of the imageable area and acquire image data. In this embodiment, the image data recording event occurrence detection process is performed based on the first and second image data acquired by the first and second imaging units 16 and 18 whose imaging range is controlled. . That is, in the present embodiment, the first and second imaging units 16 and 18 are configured so that the first and second imaging units 16 and 18 capture only the target area 100 of the image data recording event occurrence detection process. Control the imaging range.

  As described above, the area to be subjected to the image data recording event occurrence detection process changes according to the state of the moving body 2. Therefore, the target area 100 of the image data recording event occurrence detection process suitable for the situation of the moving body 2 is shown by controlling the imaging ranges of the first and second imaging units 16 and 18 according to the situation of the moving body 2. If the image data is acquired, it is possible to efficiently perform the image data recording event occurrence detection process suitable for the situation of the moving body 2.

  The imaging range control unit 90 may control the imaging range based on the speed information of the moving body 2. Alternatively, the imaging range control unit 90 may control the imaging range based on road width information of a road on which the moving body 2 is moving. Alternatively, the imaging range control unit 90 may control the imaging range based on the width information of the moving body 2 and the height information where the first and second imaging units 16 and 18 are installed.

(Fourth embodiment)
Hereinafter, an image data recording system 7 according to a fourth embodiment to which the present invention is applied will be described. FIG. 12 is a diagram for explaining the image data recording system 7 according to the present embodiment.

  The image data recording system 7 according to the present embodiment includes an objective distance sensor 200. As the objective distance sensor 200, any known sensor such as a sensor using a so-called millimeter wave may be applied.

  The image data recording system 7 according to the present embodiment includes an image data recording event occurrence detection unit 210 that detects that an image data recording event has occurred based on a signal from the objective distance sensor 200.

  The image data recording event occurrence detection unit 210 obtains distance information indicating the distance between the moving body 2 and the object 3 based on a signal from the objective distance sensor 200, and the moving body 2 and the object 3. A relative speed information acquisition unit 230 for acquiring the relative speed information. For example, the relative speed information acquisition unit 230 detects the moving speed of the object 3 based on a signal from the objective distance sensor 200, and based on the speed information of the moving body 2 acquired based on the vehicle speed pulse, the relative speed information. May be obtained.

  Even when the objective distance sensor 200 is used, distance information indicating the distance between the moving body 2 and the object 3 and relative speed information between the moving body 2 and the object 3 can be acquired. It is possible to detect that a recording event has occurred.

  Note that the image data recording system 7 according to the present embodiment may further include a control unit 240 that controls the operation of the objective distance sensor 200. The control unit 240 controls the objective distance sensor 200 so as to sense only the target area 100 of the image data recording event occurrence detection process, thereby efficiently detecting the occurrence of the image data recording event.

  The control unit 240 may include a sensing range control unit 242. The sensing range control unit 242 controls the sensing range of the objective distance sensor 200. The sensing range control unit 242 sets, for example, the width and height of the region sensed by the objective distance sensor 200 or the distance from the moving body 2. The sensing range control unit 242 may control the sensing range of the objective distance sensor 200 based on, for example, speed information of the moving body 2. Alternatively, the sensing range control unit 242 may control the sensing range of the objective distance sensor 200 based on the width information of the moving body 2. Alternatively, the sensing range control unit 242 may control the sensing range of the objective distance sensor 200 based on road information (road width information) on which the moving body 2 is moving.

  The control unit 240 may also include a sensing direction control unit 244. The sensing direction control unit 244 controls the sensing direction of the objective distance sensor 200. The sensing direction control unit 244 may control the sensing direction of the objective distance sensor 200 so as to face the traveling direction of the moving body 2. According to this, since the traveling direction of the moving body 2 can be preferentially sensed, an image data recording event can be detected efficiently, and the detection rate of the image data recording event can be increased.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. Further, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

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Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image data recording system, 2 ... Moving body, 3 ... Object, 4 ... Integrated circuit device, 5 ... Image data recording system, 6 ... Image data recording system, 7 ... Image data recording system, 10 ... Image data recording event generation | occurrence | production Detection unit, 12 ... first camera interface, 14 ... second camera interface, 16 ... first imaging unit, 18 ... second imaging unit, 20 ... distance information acquisition unit, 30 ... relative velocity information acquisition unit, DESCRIPTION OF SYMBOLS 40 ... Image data recording control part, 42 ... Memory | storage part, 44 ... Memory | storage part, 45 ... CPU, 46 ... Interface, 60 ... Imaging direction control part, 70 ... Notification processing part, 80 ... Target area | region determination part, 82 ... Speed information Acquisition unit 90 ... Imaging range control unit 100 ... Target area of image data recording event occurrence detection processing 101 ... Target area, DESCRIPTION OF SYMBOLS 102 ... Object area | region 200 ... Objective distance sensor 210 ... Image data recording event generation | occurrence | production detection part 220 ... Distance information acquisition part 230 ... Relative speed information acquisition part 240 ... Control part 242 ... Sensing range control part 244 ... Sensing direction controller

Claims (12)

An image data recording system mounted on a moving body,
Detecting that an image data recording event has occurred based on distance information between the moving object and an object existing in a predetermined area around the moving object and relative speed information between the moving object and the object An image data recording event occurrence detection unit;
An image data recording control unit that starts a process of storing image data acquired by an imaging unit provided in the moving body in a storage unit when the image data recording event occurs;
Target area determination for determining a part of an area captured by the first and second imaging units that capture an image having parallax as first and second image data that are target areas of the image data recording event occurrence detection processing And
The image data recording event occurrence detection unit,
An image data recording system that acquires the distance information and the relative velocity information based on the first and second image data. The image data recording system according to claim 1, wherein
An image data recording event end detection unit for detecting that the image data recording event has ended,
The image data recording control unit
An image data recording system that stops processing for storing the image data in the storage unit when the image data recording event ends. In the image data recording system according to claim 1 or 2 ,
The target area determination unit
An image data recording system that determines a target area for the image data recording event occurrence detection process based on speed information of the moving body. In the image data recording system according to claim 1 or 2 ,
The target area determination unit
An image data recording system that determines a target area of the image data recording event occurrence detection process based on width information of the moving body. In the image data recording system according to claim 1 or 2 ,
The target area determination unit
An image data recording system that determines a target area of the image data recording event occurrence detection process based on road width information during movement of the moving body. In the image data recording system according to any one of claims 1 to 5 ,
An image data recording system further comprising an imaging range control unit that controls imaging ranges of the first and second imaging units. The image data recording system according to claim 6 , wherein
The imaging range controller is
An image data recording system for controlling the imaging range based on speed information of the moving body. The image data recording system according to claim 6 , wherein
The imaging range controller is
An image data recording system for controlling the imaging range based on width information of the moving body. The image data recording system according to claim 6 , wherein
The imaging range controller is
The image data recording system which controls the said imaging range based on the road width information in which the said mobile body is moving. In the image data recording system according to any one of claims 1 to 9 ,
An image data recording system that acquires the distance information and the relative velocity information based on traveling direction information indicating a traveling direction of the moving body. The image data recording system according to any one of claims 1 to 10 ,
An image data recording system further comprising a notification processing unit for notifying a user that the image data is stored in the storage unit. An integrated circuit device for an image data recording device mounted on a moving body,
Detecting that an image data recording event has occurred based on distance information between the moving object and an object existing in a predetermined area around the moving object and relative speed information between the moving object and the object An image data recording event occurrence detection unit;
An image data recording control unit that starts a process of storing image data acquired by an imaging unit provided in the moving body in a storage unit when the image data recording event occurs;
Target area determination for determining a part of an area captured by the first and second imaging units that capture an image having parallax as first and second image data that are target areas of the image data recording event occurrence detection processing And
The image data recording event occurrence detection unit,
An integrated circuit device that acquires the distance information and the relative velocity information based on the first and second image data .

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