JP2016157455A - Drive recorder and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive recorder that strictly prevents alteration of recorded image data.SOLUTION: A drive recorder includes: acceleration obtaining means (16) for obtaining acceleration of a vehicle of a predetermined value or more; image pick-up means (18 and 19) for picking up an image in front of the vehicle; and storage means (34) for storing image data picked up by the image pick-up means 18 and 19 during time periods before and after the time when the acceleration obtaining means (16) has detected the acceleration of the predetermined value or more. The image pick-up means 18 and 19 include a plurality of cameras (18 and 19) that pick up an image of a single object at least in front of the vehicle at different angles.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a drive recorder and a program for storing vehicle status information before and after the occurrence of a vehicle accident such as an automobile.

  Conventionally, this type of drive recorder is attached to the inner surface of a windshield of a general vehicle, a vehicle for transportation such as a truck, a business vehicle such as a taxi or a bus, and a driver for a predetermined time before and after the accident occurs. The front video in the field of view and the video inside the car are recorded, and useful information is provided for verification in the event of a traffic accident.

  That is, the drive recorder is provided with a forward monitoring camera such as a CCD camera to capture the front of the vehicle, while an in-vehicle monitoring camera such as a CCD camera is provided to detect an in-vehicle image and detect the occurrence of a vehicle accident. Therefore, an acceleration sensor for detecting the acceleration is provided.

  The front monitoring camera always images the host vehicle and the surrounding situation from the driver's field of view, and the in-vehicle monitoring camera images in-vehicle images, and the captured image data is stored in a temporary storage memory. The image data stored in the temporary storage memory is sequentially updated to the latest one, and the past image data is held for the set time.

  When the output of the acceleration sensor exceeds a threshold due to sudden braking or sudden steering in the event of a vehicle accident, image data of a predetermined time before that point is read from the temporary storage memory, and a nonvolatile memory such as an SD memory card Stored in

  In addition, after the time when the threshold value is exceeded, image data captured after that is stored in the nonvolatile memory, so that image data for a predetermined time before and after the occurrence of the accident is saved. And it is known that the cause of an accident will be verified based on image information of the vehicle at the time of the accident (see, for example, Patent Document 1).

JP 2006-193057 A

  However, in the drive recorder described in Patent Document 1, the image data stored in the nonvolatile memory is recorded as electronic data, so that it can be rewritten and easily tampered with. For this reason, when image data is used for investigating the cause of a traffic accident or the like, there is a lack of credibility and low evidence ability.

  Accordingly, the present invention has been made to solve such a situation, and an object thereof is to provide a drive recorder in which recorded image data cannot be easily altered.

  In a first aspect, the present invention is a drive recorder including an imaging unit that images at least the front of a vehicle, and a storage unit (34) that stores image data captured by the imaging unit. A drive recorder having a plurality of imaging cameras (18, 19) for imaging the same subject at least in front of the vehicle at different angles is provided.

  In the drive recorder according to the first aspect, at least the same subject in front of the vehicle is simultaneously imaged at different angles (parallaxes of the plurality of imaging cameras) by the plurality of imaging cameras. The subject image data obtained in this way is difficult to be tampered with while matching its shadow and background.

  In a second aspect, the present invention provides the drive recorder according to the first aspect, wherein the storage means (34) detects an acceleration equal to or greater than a predetermined value by the acceleration acquisition means (16) for acquiring the acceleration of the vehicle. The image data picked up by the image pickup means is stored in the time zones before and after.

  In the drive recorder according to the second aspect, since the image data can be stored for the required time at the required timing, the required image data is efficiently provided and the capacity of the storage means (34) is saved. Is done.

In a third aspect, the present invention provides the drive recorder according to the first or second aspect, wherein the imaging regions of the plurality of imaging cameras (18, 19) each have an overlapping region and a non-overlapping region.
In the drive recorder according to the third aspect, it is difficult to tamper with an overlapping area of image data so as to have consistency.

  In a fourth aspect, the present invention provides the drive recorder according to the first or second aspect, wherein the imaging areas of the plurality of imaging cameras (18, 19) each have an overlapping area and no overlapping area. Take the state.

  In the drive recorder according to the fourth aspect, when it is necessary to perform image capturing that is difficult to falsify image data, the image capturing areas of the plurality of image capturing cameras have overlapping areas, and image data that is difficult to falsify is captured. When there is no need to perform the imaging, the imaging areas of the plurality of imaging cameras can be made to have no overlapping area, and the imaging area can be selected as necessary.

  In a fifth aspect, the present invention provides the drive recorder according to any one of the first to fourth aspects, wherein the imaging camera includes a first imaging camera (19) and a second imaging camera (18). The first imaging camera (19) images at least the front of the vehicle, and the second imaging camera (18) is provided rotatably on the first imaging camera (19). The front or the inside of the vehicle is imaged.

  In the drive recorder according to the fifth aspect, the second imaging camera (in-vehicle monitoring camera) (18) can be used as the front monitoring camera, and the same subject in front of the vehicle can be simultaneously imaged by the two imaging cameras.

In a sixth aspect, the present invention provides a drive recorder according to the fifth aspect, wherein a restricting means (20) for restricting a rotation range of the second imaging camera (18) to a predetermined range within 360 °. Have.
In the drive recorder according to the sixth aspect, the second imaging camera is held within a predetermined range within 360 °.

  In a seventh aspect, the present invention provides the drive recorder according to the sixth aspect, wherein the restricting means (20) is a sawtooth uneven portion (13a) formed on the first imaging camera (19) side. And an elastic nail portion (12a) formed on the second imaging camera (18) side and engaged with the uneven portion (13a), and engaged with the recessed portion of the uneven portion (13a). The claw portion (12a) is held in the recess when the second imaging camera (18) is not applied with a predetermined rotational torque, and the claw portion is provided with a predetermined rotational torque or more. (12a) is movable from the concave portion of the concave-convex portion (13a) to the concave portion adjacent to the convex portion.

  In the drive recorder according to the seventh aspect, a compact restricting means is obtained, and the second imaging camera is easily held at an arbitrary rotational position.

In an eighth aspect, the present invention provides the drive recorder according to the sixth aspect, wherein the regulating means (20) is a rotation stopper for fixing the second imaging camera (18) at a predetermined rotation angle position. (40).
In the drive recorder according to the eighth aspect, the second imaging camera can be reliably fixed at an arbitrary rotation position.

  In a ninth aspect, the present invention provides the drive recorder according to any one of the fifth to eighth aspects, wherein the second imaging camera (18) is configured such that when the acceleration of the vehicle is equal to or greater than a predetermined value, It has a camera rotation drive unit (35) that rotates to the position where the same subject as the first imaging camera (19) is imaged.

  In the drive recorder according to the ninth aspect, the occurrence of an accident event of the vehicle is detected by the acceleration acquisition means, and the same subject in front of the vehicle can be imaged by the first and second imaging cameras at the occurrence timing of the accident event. Become.

  In a tenth aspect, the present invention provides the drive recorder according to any one of the fifth to eighth aspects, wherein the second imaging camera (18) is based on a captured image of the first imaging camera (19). ) Has an in-vehicle monitoring controller (32a) for switching on / off.

  In the drive recorder according to the tenth aspect, after detecting the start of the movement of the vehicle based on the image of the first imaging camera (forward monitoring camera), the second imaging camera (in-vehicle monitoring camera) performs imaging. It is possible to start and detect a drowsy driving or the like.

In an eleventh aspect, the present invention is a falsification determination system that determines whether or not image data stored by a drive recorder according to any one of the first to tenth aspects is falsified, wherein the same subject is different. Provided is a tampering determination system including a tampering determination unit (37) that compares a plurality of image data captured at an angle and determines whether or not the image data has been tampered with.
In the falsification determination system according to the eleventh aspect, it is determined whether image data has been falsified.

In a twelfth aspect, the present invention relates to a collation information generating unit that generates collation information for determining whether the image data stored by the drive recorder according to any one of the first to tenth aspects has been tampered with ( 36) and a falsification determination unit (37) that compares the image data with the collation information to determine whether the image data has been falsified.
In the falsification determination system according to the twelfth aspect, it is determined whether image data has been falsified.

  In a thirteenth aspect, the present invention provides a program for causing a computer to function as a drive recorder according to any one of the first to tenth aspects.

  According to the drive recorder and the program of the present invention, since a plurality of imaging cameras simultaneously capture the same subject at different angles, the parameters of the image data become complicated and it becomes difficult to tamper with the image data. Further, since a falsification determination system is provided, it is determined whether or not the recorded image data has been falsified. Therefore, it is possible to improve the evidence ability of the image data.

1 is a partially cutaway perspective view of a drive recorder according to an embodiment as viewed from the inside of a vehicle. It is the external appearance perspective view which looked at the drive recorder of FIG. 1 from the vehicle outer side. It is the A section enlarged view of FIG. It is a figure explaining the control means of the drive recorder of FIG. 1, (a) is a fragmentary sectional view at the time of occlusion, (b) is a fragmentary sectional view at the time of movement. FIG. 3 is an external perspective view of the drive recorder of FIG. It is a functional block diagram of the drive recorder of FIG. 6A and 6B are diagrams illustrating captured images of the drive recorder in FIG. 5, in which FIG. 5A is a schematic diagram of image data captured by the front monitoring camera, and FIG. 5B is a schematic diagram of image data captured by the in-vehicle monitoring camera. It is a flowchart which shows the alteration determination method of image data. It is a flowchart which shows the other alteration determination method of image data. It is a figure explaining the rotation stopper which is the other control means of the drive recorder of FIG. 1, (a) is sectional drawing at the time of movement, (b) is sectional drawing at the time of latching.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

  FIG. 1 is an external perspective view of the drive recorder 1 according to the embodiment with a part cut away and viewed from the inside of the vehicle, FIG. 2 is an external perspective view of the drive recorder 1 when viewed from the outside of the vehicle, and FIG. The A section enlarged view is shown. 1 and 2, the drive recorder 1 is configured by abutting in series substantially cylindrical first to third case bodies 11 to 13 made of synthetic resin.

  A circular cap 14 is attached to one end of the first case body 11, and an uneven slip stopper 14 a is formed on the outer periphery of the cap 14. The cap 14 is a bracket for mounting the drive recorder 1. 15 are adjacent.

  The bracket 15 includes a ring portion 15a, a support leg portion 15b protruding outward from a part of the outer periphery of the ring portion 15a, and a mounting plate 15c formed at the upper end of the support leg portion 15b. 15a is wound around the outer periphery of the first case body 11 so as to be slidable.

  The attachment surface 15d on the upper surface of the attachment plate 15c is formed as an inclined surface in which a tangential direction in contact with the outer periphery of the ring portion 15a is used as a reference surface and the reference surface is inclined toward one side in the circumferential direction.

  Double-sided tape (not shown) and other adhesive members are attached to the attachment surface 15d, and the drive recorder 1 is adhered and fixed in an adjustable manner according to the angles of various windshields of the vehicle using the adhesive member. The

  That is, the mounting surface 15d is parallel to the angle of the windshield, but the relative angle of the first to third case bodies 11 to 13 with respect to the mounting surface 15d is adjusted, so that the first surface is independent of the angle of the mounting surface 15d. The first to third case bodies 11 to 13 can be held at a desired angle.

  The first case body 11 and the second case body 12 face each other in a rotatable manner, and the second case body 12 includes an acceleration acquisition means, for example, an acceleration sensor 16 for detecting the acceleration of the vehicle. On the outer periphery of the case body 12, a horizontal line 17 serving as an index that can indicate a horizontal position serving as a reference for the acceleration sensor 16 is recessed. When the horizontal line 17 is in the horizontal position, the reference position is set so that correct acceleration can be detected.

  In addition, it is good also as a structure which has the structure similar to the control means 20 mentioned later also between the 1st case body 11 and the 2nd case body 12. FIG. Further, the acceleration sensor 16 may be mounted on the vehicle side in addition to being provided in the drive recorder 1. In that case, the drive recorder 1 is provided with means for acquiring acceleration data via a connector or the like.

  The third case body 13 is provided with an in-vehicle monitoring camera 18 using a CCD or CMOS as a light receiving element, and the first case body 11 has a front side using a CCD or CMOS as a light receiving element as shown in FIG. A surveillance camera 19 is provided.

  The in-vehicle monitoring camera 18 and the front monitoring camera 19 include a light receiving element that converts incident light into an electric signal, an optical system that causes light to enter the light receiving element, and a processing unit that performs predetermined processing on the electric signal output from the light receiving element. A plurality of image data is acquired in time series. For example, the image data may be acquired at a rate of 30 frames per second.

  In a state where the drive recorder 1 is attached to the windshield of the vehicle, the in-vehicle monitoring camera 18 and the front monitoring camera 19 have a wide quasi-wide angle on the left and right sides, and a narrower vertical angle of view so that the light receiving elements It is difficult to be directly affected by sunlight.

  The 2nd case body 12 and the 3rd case body 13 are faced | butted so that rotation is possible, Between the 2nd case body 12 and the 3rd case body 13, the rotation range of the 3rd case body 13 is 360. A restricting means 20 for restricting to a predetermined range within 0 ° is provided.

  As shown in FIG. 3, the restricting means 20 includes a serrated uneven portion 13 a formed in an annular shape at the inner end portion of the third case body 13 and an elastic shape formed in an annular shape at one end portion of the second case body 12. It has a compact structure in which the claw portion 12a and the uneven portion 13a are engaged with each other.

  The nail | claw part 12a meshed | engaged with the recessed part of the uneven | corrugated | grooved part 13a is hold | maintained at the said recessed part, when the rotational torque more than predetermined is not provided to the 3rd case body 13. FIG. That is, the nail | claw part 12a meshes with the uneven | corrugated | grooved part 13a, and the 3rd case body 13 is positioned and hold | maintained at the 2nd case body 12 (refer Fig.4 (a)).

  In order to rotate the third case body 13, when a rotational torque of a predetermined level or more is applied, the claw portion 12a moves from the concave portion of the concave and convex portion 13a to the adjacent concave portion over the convex portion (FIG. 4). (See (b)), the claw portion 12a and the uneven portion 13a are engaged. Thereby, the third case body 13 is positioned and held on the second case body 12 at a desired rotational position.

  As described above, the third case body 13 is held within a predetermined range of 360 °, and the in-vehicle monitoring camera 18 can image the same subject imaged by the front monitoring camera 19 at different angles as shown in FIG. It is easily held at an arbitrary rotational position.

  FIG. 6 shows a functional block diagram of the drive recorder 1. In the drive recorder 1, captured images of the in-vehicle monitoring camera 18 and the front monitoring camera 19 are A / D converted by the A / D converter 31, and then subjected to predetermined image processing. Then, the processed image data is stored in the SDRAM 33 which is a primary storage unit.

  In the SDRAM 33, image data acquired in time series by the in-vehicle monitoring camera 18 and the front monitoring camera 19 are sequentially compressed and stored. In the SDRAM 33, cyclic write control is performed in which image data is sequentially written from the top to the end of the data area, and when the end of the data area is reached, the data is sequentially written from the top to the end again.

The drive recorder 1 is provided with a CPU 32 that controls various modules in accordance with a control program. The CPU 32 controls driving of the in-vehicle monitoring camera 18 and the front monitoring camera 19, and controls image processing, image data accumulation, and the like.
Further, the CPU 32 has an in-vehicle monitoring control unit 32a, and the in-vehicle monitoring control unit 32a switches on / off of the in-vehicle monitoring camera 18 based on the captured image of the front monitoring camera 19.

  Thereby, based on the captured image of the front monitoring camera 19, after detecting that the movement of the vehicle has started, it is possible to start imaging by the in-vehicle monitoring camera 18 and detect a drowsy driving or the like.

  Further, when the drive recorder 1 detects that the acceleration of the vehicle is greater than or equal to a predetermined value by the collation information generation unit 36 that generates collation information for determining whether the image data has been tampered with and the acceleration sensor 16, A non-volatile SD memory card 34, which is a storage means for storing image data stored in the SDRAM 33, and a falsification determination unit 37 that compares the image data with the collation information to determine whether the image data has been falsified. The tampering determination system 50 is constituted by these various modules.

  The collation information generation unit 36 generates collation information that is uniquely calculated based on the values of the image data captured by the in-vehicle monitoring camera 18 and the front monitoring camera 19. This collation information refers to noise information unique to analog / digital conversion that is added when images taken by the in-vehicle monitoring camera 18 and the front monitoring camera 19 are converted to digital data by the A / D converter 31.

  The SD memory card 34 stores when the acceleration of the vehicle exceeds a predetermined value, that is, the occurrence timing of an accident event, and image data acquired within a predetermined period before and after the accident event or a predetermined period before the occurrence of the accident event. Is done. Further, collation information corresponding to the image data is also stored. As described above, the SD memory card 34 stores image data for a predetermined time at the time of the accident event, so that necessary image data can be efficiently provided and the capacity of the SD memory card 34 can be increased. Savings are made.

Next, the operation of the drive recorder 1 having such a configuration will be described.
First, when a person gets into the vehicle, the front monitoring camera 19 starts an imaging operation. When the vehicle starts to move, the image captured by the front monitoring camera 19 moves. Thereby, it is detected that the vehicle has started to move, and the in-vehicle monitoring control unit 32a causes the in-vehicle monitoring camera 18 to start photographing the driver's face and the inside of the vehicle.

  Image data captured by the in-vehicle monitoring camera 18 and the front monitoring camera 19 are sequentially stored in the SDRAM 33. The SDRAM 33 always stores the latest fixed amount of image data. After a certain amount of image data is stored, new image data is overwritten sequentially.

When the vehicle stops, the CPU 32 detects that the vehicle has stopped based on the image captured by the front monitoring camera 19, stops the imaging of the in-vehicle monitoring camera 18, and also stops the front monitoring camera 19.
Further, when the occurrence of an accident event is detected based on the detection signal from the acceleration sensor 16 during driving of the vehicle, the CPU 32 determines the occurrence timing of the accident event stored in the SDRAM 33 at this occurrence timing, and this. Image data acquired during a predetermined period before and after the image data and collation information corresponding to the image data are stored in the SD memory card 34, respectively.

  In this case, if the third case body 13 is manually rotated and the in-vehicle monitoring camera 18 is positioned so as to face the same subject as the front monitoring camera 19 in advance, the same subject in front of the vehicle is Images are taken at different angles by both the front monitoring camera 19 and the in-vehicle monitoring camera 18.

Therefore, when an accident event occurs, the image data of the same subject acquired by the front monitoring camera 19 and the in-vehicle monitoring camera 18 and the collation information corresponding to this image data are stored in the SD memory card 34 at the time of the accident event and in a predetermined period before and after the accident event. Remembered.
At this time, since the rotation position of the third case body 13 is reliably held by the restricting means 20, the in-vehicle monitoring camera 18 does not shift even if an unintentional external force such as impact or vibration is applied. Holds securely.

  As described above, the direction of the in-vehicle monitoring camera 18 can be freely changed by a simple manual operation, and the imaging areas of the front monitoring camera 19 and the in-vehicle monitoring camera 18 can easily have an overlapping area and a non-overlapping area. Set to

  In the image data captured by the front monitoring camera 19 (see FIG. 7A) and the image data captured by the in-vehicle monitoring camera 18 (see FIG. 7B) thus obtained, for example, a region that does not overlap with the overlapping region X When there is a subject that moves between Y and Y, it is difficult to tamper with the consistency between the overlapping region X and the non-overlapping region Y, and a tampering prevention effect can be obtained.

  As described above, in the drive recorder 1 of the present embodiment, the same subject can be simultaneously imaged at different angles due to the parallax between the front monitoring camera 19 and the in-vehicle monitoring camera 18, and the obtained image data of the subject is the shadow or It becomes difficult to tamper with matching the background and the like, and the evidence ability of image data can be improved.

  In addition, when it is necessary to perform photographing that is difficult to falsify, the imaging regions of the front monitoring camera 19 and the in-vehicle monitoring camera 18 have an overlapping region X, and it is not necessary to perform photographing that is difficult to falsify. In this case, the imaging areas of the front monitoring camera 19 and the in-vehicle monitoring camera 18 can be made to have no overlapping area X.

  In other words, the combined imaging area of the front monitoring camera 19 and the in-vehicle monitoring camera 18 may be narrow and only needs to be able to shoot the vehicle, for example, only in front of the vehicle. As described above, the imaging area including the front monitoring camera 19 and the in-vehicle monitoring camera 18 is desired to have a wide range, and it is possible to select the imaging area as needed for customers who do not need to consider tampering. . As a result, the versatility of the drive recorder 1 is improved, and the drive recorder 1 is also used for different purposes, thus saving costs.

Next, the image data alteration determination method performed by the image data alteration determination system 50 will be described with reference to the flowchart of FIG.
First, the image data of the front monitoring camera 19 and its shooting time data are stored (step S1), and the image data of the in-vehicle monitoring camera 18 that images the same subject as the front monitoring camera 19 and its shooting time data are stored (step S2). ).

Then, the image data of the front monitoring camera 19 at the same shooting time (see FIG. 7A) and the image data of the in-vehicle monitoring camera 18 (see FIG. 7B) are compared (step S3). It is determined whether or not the shadow, background, etc. of the subject have consistency (step S4).
If it has consistency, it is determined that the image data is correct (step S5), and if it does not have consistency, it is determined that there is a possibility of falsification (step S6). Thereby, the presence or absence of falsification of the image data is determined and the authenticity of the image data is confirmed, so that the evidence ability can be improved.

  Further, in the falsification determination method for image data shown in FIG. 9, the collation information generation unit 36 first generates collation information (noise information) unique to analog / digital conversion that is uniquely calculated based on the image data in question. (Step S1). Thereafter, the noise information detected from the image data read from the SD memory card 34 is compared with the collation information uniquely calculated (steps S2 and S3).

  If the comparison results match (no change in noise information), it is determined to be correct (step S4), and if they do not match (change in noise information), it is determined that there is a possibility of falsification (step) In step S5), it is determined whether the image data has been tampered with.

  In this tampering judgment method, when the image is pasted, deleted or edited, the noise added at the time of digitization changes. It detects the presence or absence of data falsification.

  The drive recorder according to the present invention is not limited to the above-described embodiment, and can adopt various configurations without departing from the gist of the present invention.

For example, in the present embodiment, the falsification determination system 50 is provided in the drive recorder 1, but may be configured separately from the drive recorder 1.
That is, the storage means of the drive recorder 1 is composed of a detachable nonvolatile memory or the like, and the nonvolatile memory is attached to another device and read to determine whether it has been tampered with, or an image of the storage means of the drive recorder 1 Data may be read out by another device connected by wire or wirelessly and tampered with. Furthermore, the tampering determination system 50 may be configured by a personal computer, a portable terminal, or the like.

Further, instead of the restricting means 20, a rotation stopper 40 shown in FIG. 10 may be provided as another restricting means.
That is, the rotation stopper 40 has a plurality of latching pieces 12 b formed at equal intervals in the circumferential direction of the inner end of the second case body 12, and the movable piece 43 is fixed to the shaft 41 of the third case body 13. Yes.

  The movable piece 43 is biased in one direction by the torsion spring 42 and can rotate only in the other direction. That is, the third case body 13 rotates to a desired rotational angle position against the biasing force of the torsion spring 42 (see FIG. 10A), and is latched by the latching piece 12b at the position (see FIG. 10A). (Refer FIG.10 (b)). As a result, the vehicle interior monitoring camera 18 is securely fixed at an arbitrary rotational position, and imaging inside the vehicle as well as outside the vehicle is possible.

  In the present embodiment, the in-vehicle monitoring camera 18 is configured to manually rotate. However, the drive recorder 1 is provided with a camera rotation driving unit that rotates the in-vehicle monitoring camera 18, and the occurrence timing of an accident event detected by the acceleration sensor 16 is provided. Thus, by automatically rotating the third case body 13, the in-vehicle monitoring camera 18 is rotated to a position where the subject in front of the vehicle is imaged, and the in-vehicle monitoring camera 18 is imaged by the same subject as the front monitoring camera 19. You may comprise so that it may position. As a result, the in-vehicle monitoring camera 18 images the inside of the vehicle in normal times, but images the same subject in front of the vehicle together with the front monitoring camera 19 in the event of an accident.

  Further, instead of the acceleration sensor 16, another sensor that can detect the impact of an accident such as a gyro sensor may be used. Instead of the SD memory card 34, a hard disk or an optical disk may be used.

  Further, the drive recorder 1 can record voices in addition to in-vehicle images, and can be used for recording conversations, telephone calls, and crime prevention measures in the vehicle, and image data of the front monitoring camera 19 and the in-vehicle monitoring camera 18. Can be displayed three-dimensionally on a three-dimensional display or the like.

  For example, as a playback device, it is determined whether there is a similarity between the video of the front monitoring camera 19 and the video of the in-vehicle monitoring camera 18 recorded on the SD memory card 34 at the same time. 3D video data is generated taking into account the similarity between the two images and output to one screen display means such as a 3D television. On the other hand, if there is no similarity, 2 screens are displayed. Playback that makes two-dimensional display instead of three-dimensional display, such as dividing into two areas and displaying both videos in each area, or displaying either one of both videos on the screen Configure the device.

  The presence or absence of similarity may be determined by providing a predetermined threshold value or the like. In this way, for example, when tampering occurs, it is determined that there is no similarity depending on the degree of tampering, resulting in a two-dimensional display. Therefore, tampering can be easily determined by viewing the display state of whether the display is two-dimensional or three-dimensional and the contents of both images.

  The drive recorder of the present invention can be used as a vehicle monitoring unit that monitors both outside and inside the vehicle.

DESCRIPTION OF SYMBOLS 1 Drive recorder 11 1st case body 12 2nd case body 12a Claw part 12b Latching piece 13 3rd case body 13a Uneven part 14 Cap 14a Anti-slip 15 Bracket 15a Ring part 15b Support leg part 15c Mounting plate 15d Mounting surface 16 Acceleration Sensor 17 Horizontal line 18 Vehicle surveillance camera 19 Front surveillance camera 20 Restriction means 32 CPU
32a Car interior monitoring control unit 33 SDRAM
34 SD Memory Card 36 Verification Information Generation Unit 37 Tampering Determination Unit 40 Rotation Stopper 50 Tampering Determination System

Claims (7)

  A falsification determination system that determines the possibility of falsification of image data captured by an imaging means,
  A falsification determination information storage function for storing falsification determination information corresponding to captured image data;
  A tampering determination function for determining whether or not the read image data has been tampered with based on the read image data and the stored tampering determination information;
  The tampering determination information storage function includes a function of storing second image data captured by a second imaging unit as the tampering determination information,
  The second image data has a different angle with respect to the same subject as the subject imaged by the imaging means, so that the image data and the imaging region of the second image data each have an overlapping region and a non-overlapping region. From the second imaging means,
  The falsification determination function determines the possibility of falsification based on the consistency of a subject that moves between an area in which the imaging areas of the image data and the second image data overlap and an area that does not overlap.
  Tamper detection system characterized by   The falsification determination information storage function stores, as the falsification determination information, collation information corresponding to the image data that is uniquely calculated based on the value of the image data,
  The falsification determination unit compares the collation information calculated from the read image data with the stored collation information to determine the possibility of falsification.
  The tampering determination system according to claim 1.   The collation information corresponding to the image data that is uniquely calculated based on the value of the image data is noise information at the time of analog / digital conversion that is added when the image captured by the imaging unit becomes digital data. ,
  The collation information calculated from the read image data is noise information detected from the read image data.
  The tampering determination system according to claim 2, wherein:   A drive recorder comprising the falsification determination system according to any one of claims 1 to 3.   A drive recorder provided with a falsification determination information storage function in the falsification determination system according to any one of claims 1 to 3.   The apparatus which has the alteration determination function in the alteration determination system in any one of Claim 1 to 3.   The program for making a computer implement | achieve the function of the falsification determination system of any one of Claim 1 to 3.

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