JP2022009245A - Drive recorder, captured image display device, captured image display method, captured image display program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device mounted to a room mirror and capable of preferably imaging a front scenery of a vehicle.

SOLUTION: A drive recorder 1 is mounted to a room mirror 2 that is installed to a vehicle, and includes a mirror part 3 and a camera 11. The camera 11 has an imaging direction inclined in a horizontal direction only by 20° relative to a normal direction in a center location of a mirror surface of the mirror part 3. In this case, the camera 3 has the imaging direction that is substantially the same as a front direction of the vehicle while the mirror part 3 is adjusted to a use state.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a technique for photographing a front landscape from a vehicle.

Conventionally, a rear-view mirror equipped with a camera that captures the scenery in front of the vehicle has been known. For example, Patent Document 1 discloses a rear-view mirror with a built-in camera in which a camera is installed in the internal space of a case constituting the rear-view mirror so that the shooting direction of the camera does not change regardless of the angle adjustment of the rear-view mirror. There is.

Japanese Unexamined Patent Publication No. 2007-022495

Patent Document 1 requires a space for eliminating the interference between the camera and the rear-view mirror case, and has a problem that the rear-view mirror case becomes large.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide an image pickup device that is mounted on a rear-view mirror and can suitably capture a front view of a vehicle.

The invention according to the claim is a drive recorder for displaying a captured image acquired by an imaging unit mounted on a vehicle, the display unit displaying the captured image, the imaging time of the captured image, and the imaging. A display control unit that superimposes text information indicating at least one of the traveling speeds of the vehicle at the time of capturing an image on the captured image and displays it on the display unit, and the display unit is arranged in front of the display unit. The vehicle includes a mirror unit that transmits a part of the light of the image to be displayed, an acceleration detection unit that detects acceleration, and a main body unit that includes the display unit, the display control unit, the mirror unit, and the acceleration detection unit. The mounting portion includes a mounting portion that is mounted so as to overlap the mirror surface of the room mirror, and the mounting portion sets the mounting direction of the main body portion from the first direction and the first direction along the mirror surface of the room mirror 180. It can be mounted in the second direction rotated by a degree, and the display control unit sets the rotation direction of the character information to be displayed on the display unit based on the direction of the gravitational acceleration detected by the acceleration detection unit. It is characterized by that.
The invention according to claim is a photographed image display device mounted on a rear-view mirror mounted on a vehicle and displaying an image captured by an image pickup unit mounted on the vehicle.
The mounting portion of the captured image display device that can be mounted on the rearview mirror can be mounted in the first direction and the second direction that is opposite to the first direction, and the user can visually recognize the rear view. A mirror unit, a display unit configured as a part of the mirror unit, and a display control unit for adding text or a figure to the captured image and displaying the image on the display unit, and the display control unit is described as described above. It is characterized by rotating the display direction of the text or the figure based on the direction of gravity acting on the captured image display device.
Further, according to the claimed invention, the vehicle can be mounted on the rear-view mirror in the first direction and the second direction which is opposite to the first direction, and is mounted on the vehicle. It is a captured image display method executed by a captured image display device that displays an captured image acquired by a captured image unit on a display unit configured as a part of a mirror unit that enables rear-view viewing by the user. A display control step of adding text or a figure to the captured image and displaying it on the display unit.
The display control step is characterized in that the display direction of the text or the figure is rotated based on the direction of gravity acting on the captured image display device.
Further, the invention according to the claim is a photographed image display program, and the vehicle can be mounted on the rearview mirror in a first direction and a second direction which is opposite to the first direction. The computer has a captured image display device that displays the captured image acquired by the imaging unit mounted on the vehicle on a display unit configured as a part of the mirror unit that enables the user to visually recognize the rear. , A display control step of adding text or a figure to the captured image and displaying it on the display unit is executed, and the display control step is based on the direction of gravity acting on the captured image display device. It is characterized by rotating the display direction of the figure.

The front view and the rear view of the drive recorder are shown. The top view of the drive recorder is shown. The block diagram of the drive recorder is shown. The top view and the side view of the inside of a vehicle when the vehicle has a right-hand drive are shown. It is a figure which shows the relationship between a photographed image and a cut-out image. This is a display example. The rear view and the top view of the drive recorder when the vehicle has a left-hand drive are shown. It is a schematic block diagram of the system which concerns on the modification.

In one preferred embodiment of the invention, the vehicle is mounted on a rearview mirror mounted on the vehicle.
An imaging device for photographing the landscape in front of the vehicle, the mirror portion and a photographing means having a photographing direction tilted by a first angle in the horizontal direction with respect to the normal direction at the center position of the mirror surface of the mirror portion. The first angle is set to an angle at which the shooting direction of the shooting means substantially coincides with the front direction of the vehicle when the mirror portion is adjusted to the used state.

The photographing device is attached to a rear-view mirror provided in the vehicle, and includes a mirror portion and a photographing means. The photographing means has a photographing direction tilted by a first angle in the horizontal direction with respect to the normal direction at the center position of the mirror surface of the mirror portion. Here, the first angle is set to an angle at which the shooting direction of the shooting means substantially coincides with the front direction of the vehicle when the mirror portion is adjusted to the used state. Here, the "angle at which the shooting direction of the photographing means substantially coincides with the front direction of the vehicle" refers to an angle such that the shooting direction of the photographing means is within a difference of 10 ° from the front direction of the vehicle. According to this aspect, the photographing device can suitably photograph the front scenery centered on the front direction of the vehicle in a state where the mirror portion is adjusted to the usage state by the driver.

In one aspect of the imaging device, the imaging device is an acceleration sensor that detects acceleration, and an image control means that outputs an image obtained by cutting out a part of an image captured by the imaging means based on the output of the acceleration sensor. And. According to this aspect, the photographing device can suitably recognize the inclination of the photographing device based on the output of the acceleration sensor, and can appropriately cut out and output the portion reflecting the front direction of the vehicle from the photographed image.

In another aspect of the imaging device, the imaging device is based on the angle difference between the normal direction and the front direction of the vehicle, which is calculated by the image control means based on the output of the acceleration sensor. The center position of the image output by the image control means is changed. According to this aspect, the photographing device can suitably cut out and output a portion reflecting the front direction of the vehicle from the photographed image.

In another aspect of the photographing apparatus, the photographing apparatus is based on a detection means for detecting a vanishing point in an image photographed by the photographing means and a vanishing point detected by the detecting means by the photographing means. It is provided with an image control means for cutting out and outputting a part of the captured image. Also in this aspect, the photographing device can suitably cut out the portion reflecting the front direction of the vehicle from the photographed image and output it.

In another aspect of the photographing apparatus, the photographing apparatus includes a display means configured as a part of the mirror portion, and the display means displays an image output by the image control means. According to this aspect, the photographing device can preferably make the driver visually recognize an image of the scenery in front of the vehicle.

In another aspect of the photographing apparatus, the photographing apparatus includes a non-volatile memory for storing an image, and the non-volatile memory is rotated based on the direction of gravity applied to the mirror surface direction of the mirror portion. The output image of the image control means is stored. According to this aspect, the image of the front view always viewed from the front can be stored in the non-volatile memory regardless of the mounting mode of the photographing device on the rearview mirror.

In another aspect of the imaging device, the imaging device is used to capture an image captured by the imaging means.
A superimposing means for superimposing and outputting a text or a figure is provided, and the superimposing means rotates the direction of the text or the figure based on the direction of gravity applied to the mirror surface direction of the mirror portion. According to this aspect, the photographing apparatus can appropriately set the orientation of the text or the figure to be superimposed on the image photographed by the photographing means.

In another aspect of the imaging apparatus, the imaging means has an imaging direction tilted with respect to the normal direction by the first angle, which is an angle within the range of 10 ° to 30 °. By this aspect,
The photographing device can suitably photograph the front scenery in the front direction of the vehicle in the used state after adjusting the angle.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Hereinafter, the "shooting direction" is a direction that is in front of the camera and refers to a direction that passes through the center of the field of view (shooting range) of the camera.

[Rough configuration]
FIG. 1 shows a drive recorder 1 according to this embodiment. Specifically, FIG. 1 (A) shows a front view in a state where the drive recorder 1 is mounted on the rearview mirror 2 in the vehicle interior (also simply referred to as “mounted state”), and FIG. 1 (B) shows a front view. The rear view of the drive recorder 1 in the mounted state is shown. Hereinafter, the longitudinal direction of the drive recorder 1 will be referred to as the "Y-axis direction", the lateral direction of the drive recorder 1 will be referred to as the "Z-axis direction", and the directions perpendicular to the Y-axis and the Z-axis will be referred to as the "X-axis direction". Is defined as shown in the figure.

The drive recorder 1 shown in FIG. 1 mainly includes a mirror unit 3, a camera (shooting means) 11, and
It has a display (display means) 10 existing on the back surface of the mirror portion 3 and holding portions 16A to 16D. Then, the drive recorder 1 is fixed to the rearview mirror 2 by the holding portions 16A to 16D holding the rearview mirror 2 in the mounted state. Then, in the mounted state of the drive recorder 1, the mirror surface of the rearview mirror 2 and the back surface of the drive recorder 1 overlap each other.

Note that FIG. 1 shows the mounted state of the drive recorder 1 when the vehicle has a right-hand drive, and when the vehicle has a left-hand drive, it is rotated 180 ° on the YZ plane from FIG. 1 (B). The drive recorder 1 is mounted on the rearview mirror 2. The case where the vehicle has left-hand drive is described in detail in the [Left-hand drive support] section.

The mirror unit 3 is, for example, a half mirror, which transmits a part of the incident light and reflects other light. As a result, the mirror unit 3 functions as a normal mirror that reflects the rear view of the vehicle when the display 10 on the back surface is in the non-light emitting state, and transmits the light emitted from the display 10 when the display 10 is in the light emitting state. , Make the driver visually recognize the display contents of the display 10.

The display 10 displays an image (also referred to as “cut-out image Imc”) cut out from an image (also referred to as “captured image Im”) taken by the camera 11. Cutout image Im
As will be described later, c is an image cut out from the captured image Im so that the front landscape in the front direction of the vehicle is the center of the image, and the number of pixels in the vertical and horizontal directions is smaller than that of the captured image Im. again,
The display 10 superimposes and displays an image (also referred to as a “guidance image”) representing characters and figures for guiding the driver on the cut-out image Imc. In FIG. 1A, the display 10 displays a guide image showing the vehicle speed and a guide image of a square frame emphasizing a lit signal lamp.
It is displayed superimposed on the cut-out image Imcc.

The camera 11 is arranged on the rear portion of the drive recorder 1 which does not overlap with the rearview mirror 2 when the drive recorder 1 is attached. Further, the shooting direction of the camera 11 (that is, the direction of the camera 11) is tilted laterally by 20 ° with respect to the normal line (also referred to as the normal line “Ln”) at the center position of the mirror surface of the mirror unit 3. There is. Here, the above-mentioned "20 °" is a standard left-right tilt angle when a driver having a general physique sets the tilt of the rear-view mirror 2, and is the "first angle" in the present invention. This is just one example. As a result, with the driver adjusting the angle of the drive recorder 1, the shooting direction of the camera 11 is the front direction (front direction) of the vehicle.
Approximately matches. This will be described with reference to FIG.

FIG. 2 shows a top view of the drive recorder 1. In the example of FIG. 2, the drive recorder 1 is tilted counterclockwise by 20 ° so that the mirror portion 3 of the drive recorder 1 is directed toward the driver.

Here, as shown in FIG. 2, the shooting direction of the camera 11 indicated by the arrow 41 is tilted clockwise (clockwise) by 20 ° on the horizontal plane (that is, the XY plane) with respect to the normal Ln. Further, the normal Ln is tilted counterclockwise (counterclockwise) by 20 ° on the horizontal plane with respect to the front direction of the vehicle by adjusting the angle of the mirror portion 3 of the driver. As a result, in the example of FIG. 2, the shooting direction of the camera 11 indicated by the arrow 41 coincides with the front direction of the vehicle.

After that, the installation state of the drive recorder 1 shown in FIG. 2, that is, the normal Ln is tilted counterclockwise in the XY plane by 20 ° with respect to the front direction of the vehicle, and the drive recorder 1 is perpendicular to the horizontal plane. The state is also called the "reference state".

FIG. 3 is a functional block diagram of the drive recorder 1. As shown in FIG. 3, the drive recorder 1 includes a display 10, a camera 11, an acceleration sensor 12, a non-volatile memory 13, and a control unit 14.

The acceleration sensor 12 detects acceleration in the three axes of the X-axis, the Y-axis, and the Z-axis, and supplies the detection signal to the control unit 16. The non-volatile memory 13 is a storage medium such as an SD card, and stores a captured image Im generated by the camera 11 or a cut-out image Imc displayed on the display 10 under the control of the control unit 14.

The control unit 14 includes a CPU (Central Processing Unit) and a CPU.
ROM (Read Only Mem) that stores control programs and data executed by
ory), various data are sequentially read and written as work memory when the CPU operates R
It has AM (Random Access Memory) and the like, and controls the drive recorder 1 in general.

For example, the control unit 14 overwrites the captured image Im or the cut-out image Imc for a predetermined time in the temporary memory, and when the acceleration sensor 12 detects an acceleration of a predetermined value or more, the captured image Im or the cut-out image Im saved in the temporary memory. The image Imc is written to the non-volatile memory 13. Further, the control unit 14 performs various recognition processes such as detection of a vehicle in front, detection of a lane, and detection of a lighting color of a traffic light by a known image recognition technology based on the captured image Im, and guides based on the recognition result. The image is cut out and superimposed on the image Imcc to be displayed on the display 10. Control unit 1
4 is an example of the "image control means" and the "superimposition means" in the present invention.

[Method of generating cropped image Imc]
Next, a method of generating a cut-out image Imc will be described. Generally, the control unit 14 is
The center position of the cut-out image Imc on the captured image Im is moved based on the difference in the inclinations of the normal Ln in the horizontal direction and the vertical direction when compared with the reference state shown in FIG. As a result, even when the drive recorder 1 in the mounted state is adjusted in angle according to the physique of the driver, the control unit 14 suitably generates a cut-out image Imc centered on the front direction of the vehicle and displays it. Display on 10.

Hereinafter, a case where the vehicle has a right-hand drive will be described. The control unit 14 determines, for example, which vehicle of the right-hand drive or the left-hand drive the drive recorder 1 is mounted on, based on the acceleration in the Z-axis direction (that is, the gravitational acceleration) output by the acceleration sensor 12.

FIG. 4A shows a top view of the inside of the vehicle when the vehicle has a right-hand drive. In addition, FIG. 4 (B)
Shows a side view of the vehicle when the vehicle has a right-hand drive.

In this case, first, based on the output of the acceleration sensor 12, the control unit 14 tilts the normal Ln with respect to the front direction of the vehicle on the horizontal plane (also referred to as “horizontal tilt angle θh”. See FIG. 4A).
) And the elevation angle of the normal Ln with respect to the horizontal plane (also referred to as "vertical tilt angle θv". See FIG. 4 (B).
) And each. In this case, preferably, the control unit 14 is the X of the acceleration sensor 12.
For each output value of the Y and Z axes, a statistical value such as a moving average for a predetermined period may be calculated, and a horizontal tilt angle θh and a vertical tilt angle θv may be calculated based on the calculated statistical value.

Next, the control unit 14 sets the center position of the cut-out image Imc on the captured image Im according to the difference between the detected horizontal tilt angle θh and the horizontal tilt angle θh (that is, 20 °) in the reference state. Shift laterally from the center position of. Further, the control unit 14 sets the center position of the cut-out image Imc on the captured image Im according to the difference between the detected vertical tilt angle θv and the vertical tilt angle θv (that is, 0 °) in the reference state. Move up and down from the center position. This will be described with reference to FIG.

FIG. 5 is a diagram showing the positional relationship between the captured image Im and the cut-out image Imc. In FIG. 5, the position “Pimc” indicates the center position of the cut-out image Imc, and the position “Pim” indicates the center position of the captured image Im. Further, the horizontal width and the vertical width of the cut-out image Imc are set shorter than the captured image Im in consideration of the possible angles of the horizontal tilt angle θh and the vertical tilt angle θv.

In the example of FIG. 5, the control unit 14 determines that the horizontal tilt angle θh detected by the acceleration sensor 12 is larger than the horizontal tilt angle θh (that is, 20 °) in the reference state by a predetermined angle, and corresponds to the predetermined angle. The center position Pimc is shifted to the right by the distance "Lh" from the center position Pimm. In this case, for example, the control unit 14 stores in advance a map or formula showing an appropriate setting value of the distance Lh for each candidate value of the predetermined angle described above, and refers to the map or the like to obtain the distance Lh. Set. On the other hand, when the detected horizontal tilt angle θh is smaller than the horizontal tilt angle θh in the reference state, the control unit 14 sets the center position Pimc to the left of the center position Pim according to the angle difference between these horizontal tilt angles θh. Shift to.

Similarly, in the example of FIG. 5, the control unit 14 has a vertical tilt angle θ detected by the acceleration sensor 12.
It is determined that v is larger than the vertical tilt angle θv (that is, 0 °) in the reference state by a predetermined angle, and the center position Pimc is shifted from the center position Pim by a distance “Lv” corresponding to the predetermined angle. .. In this case, for example, the control unit 14 stores in advance a map or formula showing an appropriate setting value of the distance Lv for each candidate value of the predetermined angle described above, and refers to the map or the like to obtain the distance Lv. Set. When the detected vertical tilt angle θv is smaller than the vertical tilt angle θv in the reference state, the control unit 14 sets the center position Pimc above the center position Pim according to the angle difference of these vertical tilt angles θv. Shift to.

Then, in the example of FIG. 5, the center position Pimc is based on the horizontal tilt angle θh and the vertical tilt angle θv.
As a result of moving, the center position of the cut-out image Imc coincides with the center position of the captured image Im captured when the imaging direction of the camera 11 coincides with the front direction of the vehicle. That is,
The control unit 14 determines the cut-out range of the cut-out image Imc so that the vanishing point on the extension line in the front direction of the vehicle becomes the center position of the cut-out image Imc.

FIG. 6 is a display example of the display 10 on which the cut-out image Imc shown in FIG. 5 is displayed. As shown in FIG. 6, the control unit 14 displays the cutout image Imc generated based on the vertical tilt angle θv and the horizontal tilt angle θh on the display 10, and also displays the guide images 80 and 81 for guiding the driver. It is displayed. In FIG. 6, the control unit 14 cuts out a guide image 80 surrounding a lighting state signal lamp recognized based on the captured image Im and a guide image 81 showing the vehicle speed acquired based on the output of a distance sensor or the like (not shown). It is superimposed on the display.

As shown in FIG. 6, the control unit 14 has the same direction as the driver's line of sight even when the drive recorder 1 is appropriately adjusted in angle from the reference state shown in FIG. 2 according to the driver's physique and the like. A cut-out image Imc whose orientation is the shooting direction can be generated and displayed on the display 10. Further, since the camera 3 is tilted in advance so that the shooting direction of the camera 3 substantially coincides with the front direction of the vehicle when the mirror unit 3 is adjusted to the used state, the pixels of the shot image Im and the cut-out image Imc. It is possible to bring the numbers closer. That is, display 1
It is possible to display an image showing the front direction of the vehicle without extremely deteriorating the resolution of the cutout image Imc displayed at 0.

[Correspondence to left-hand drive]
Next, a case where the vehicle has a left-hand drive will be described. FIG. 7A shows a rear view of the drive recorder 1 when the vehicle has a left-hand drive, and FIG. 7B shows a top view of the drive recorder 1 when the vehicle has a left-hand drive.

As shown in FIG. 7A, when the vehicle has a left-hand drive, the drive recorder 1 is rotated 180 ° on the YZ plane from the state of FIG. 1B when the vehicle has a right-hand drive. It is attached to the room mirror 2. In this case, the drive recorder 1 is attached to the rear-view mirror 2 with the holding portions 16A and 16B sandwiching the lower end position of the rear-view mirror 2 and the holding portions 16C and 16D sandwiching the upper end position of the rear-view mirror 2.

In this case, as shown in FIG. 7B, the shooting direction of the camera 11 indicated by the arrow 41 is the normal line L.
It is tilted counterclockwise (counterclockwise) by 20 ° on the XY plane with respect to n. In addition, FIG. 7 (B)
), The normal Ln is tilted clockwise (clockwise) by 20 ° on the XY plane with respect to the front direction of the vehicle. Therefore, in the state shown in FIG. 7B, the shooting direction of the camera 11 indicated by the arrow 41 substantially coincides with the front direction of the vehicle.

Then, the control unit 14 regards the state shown in FIG. 7B as a reference state, and determines the center position of the cut-out image Imc in the captured image Im as in the description of FIGS. 4 and 5. Specifically, the control unit 14 has a horizontal tilt angle θh (that is, 20 °) and a vertical tilt angle θv (that is, 0 °) in the reference state, and a horizontal tilt angle θh and a vertical tilt angle θv detected by the acceleration sensor 12. Based on each angle difference of, the center position of the cut-out image Imc on the captured image Im is determined.

After determining the range of the cut-out image Imc, the control unit 14 displays the cut-out image Imc on the display 10 without turning it upside down. Here, the display 10 and the camera 11
Both are upside down from the case of the mounted state in the right-hand drive vehicle, so that the control unit 14 makes the driver visually recognize the cut-out image Imc in the correct direction.

Further, the control unit 14 superimposes the guide image to be superimposed and displayed on the cut-out image Imc on the cut-out image Imc in a state of being rotated by 180 ° and displays it on the display 10. In this case, the control unit 14 is not limited to the guide image (for example, the guide image 80 in FIG. 6) generated in connection with the image recognition result, but also guides showing various information such as an operation menu, the current time, and the traveling speed of the vehicle. The image (for example, the guide image 81 in FIG. 6) is also rotated by 180 ° and displayed on the cutout image Imcc. As a result, the control unit 14 superimposes the guide image on the cut-out image Imc in an appropriate direction and makes the driver visually recognize the guide image.

Further, when the control unit 14 records the captured image Im or the cut-out image Imc in the non-volatile memory 13, the control unit 14 stores the captured image Im or the cut-out image Imc to be recorded in the non-volatile memory 13.
After rotating it by 0 °, it is recorded in the non-volatile memory 13. By doing so, when the non-volatile memory 13 is taken out from the drive recorder 1 and the captured image Im or the cut-out image Imc recorded in the non-volatile memory 13 by a PC or the like is reproduced, the captured image Im or the cut-out image Imc is generated. It can be suitably suppressed that the image is displayed upside down.

As described above, the drive recorder 1 according to the present embodiment is mounted on the rear-view mirror 2 provided in the vehicle, and includes the mirror unit 3 and the camera 11. The camera 11 has a shooting direction tilted by 20 ° in the horizontal direction with respect to the normal direction at the center position of the mirror surface of the mirror unit 3. In this case, when the mirror unit 3 is adjusted to the used state, the shooting direction of the camera 3 substantially coincides with the front direction of the vehicle. Therefore, the drive recorder 1 can suitably capture the front scenery centered on the front direction of the vehicle when the vehicle is traveling.

[Modification example]
Hereinafter, a modification suitable for the above-mentioned embodiment will be described. The following modifications may be applied to the above-described embodiment in any combination.

(Modification 1)
In FIG. 2 and the like, the camera 11 is tilted in the longitudinal direction of the drive recorder 1 by 20 ° with respect to the normal line Ln. However, the installation angle of the camera 11 to which the present invention is applicable is not limited to this. Instead, the camera 11 should be tilted in the longitudinal direction of the drive recorder 1 with respect to the normal Ln within the range of 10 ° to 30 °, which is the adjustment range of the rear-view mirror 2 of a general driver. Just do it.

(Modification 2)
In the description of the section [Method of generating a cutout image], the control unit 14 determines the center position of the cutout image Imc in the captured image Im based on the detected horizontal tilt angle θh and vertical tilt angle θv. Instead, the control unit 14 may detect a vanishing point from the captured image Im by a known method, and determine the range of the cut-out image Imc so that the detected vanishing point becomes the center.

In this case, it is preferable that the control unit 14 calculates the position of the vanishing point in the captured image Im taken while traveling on a flat and straight road by a statistical method and fixes it as the center position of the cut-out image Imcc. .. For example, the control unit 14 calculates the vanishing point on the captured image Im for a plurality of captured images Im whose output of the acceleration sensor 12 at the time of photographing the captured image Im is within a predetermined range, and the calculated vanishing point is calculated. The average position of the points is defined as the center position of the cutout image Imcc. By doing so, the control unit 14 cuts out the captured image Im even if the vanishing point in the captured image Im frequently moves when traveling on a rough road or a road with undulations. Image I
Frequent changes in the relative position of the mc can be suitably suppressed. In this modification, the control unit 14 is an example of the "detection means" in the present invention.

(Modification 3)
The drive recorder 1 can be attached to the rearview mirror 2, has only a shooting function by the camera 11, and does not have to have a display function by the display 10 or an image recording function by the non-volatile memory 13.

FIG. 8 shows an outline of the system according to the modified example. In the example of FIG. 8, the drive recorder 1 is
It connects to the server device 6 via a network. Then, the drive recorder 1 transmits the captured image Im or the cut-out image Imc to the server device 6 when the acceleration sensor 12 detects an acceleration of a predetermined value or more.

(Modification example 4)
The drive recorder 1 may determine whether to store the captured image Im or the cut-out image Imc in the non-volatile memory 13 based on the user input to the input unit (not shown). Then, when the cut-out image Imc is stored in the non-volatile memory 13 based on the user input, the drive recorder 1 can suitably record an image that accurately captures the front direction of the vehicle.
On the other hand, when the captured image Im is stored in the non-volatile memory 13 based on the user input, the drive recorder 1 can suitably record an image having a wide angle of view.

1 Drive recorder 2 Room mirror 3 Mirror unit 6 Server device 10 Display 11 Camera 12 Accelerometer 13 Non-volatile memory 14 Control unit

Claims (1)

It is a drive recorder that displays the captured image acquired by the imaging unit mounted on the vehicle.
A display unit that displays the captured image and
A display control unit that superimposes character information indicating at least one of the imaging time of the captured image and the traveling speed of the vehicle at the time of capturing the captured image on the captured image and displays it on the display unit.
A mirror unit arranged in front of the display unit and transmitting a part of the light of the image displayed by the display unit, and a mirror unit.
Acceleration detection unit that detects acceleration and
The main body including the display unit, the display control unit, the mirror unit, and the acceleration detection unit.
The mounting part to be mounted so as to overlap the mirror surface of the rear-view mirror of the vehicle,
Equipped with
The mounting portion can be mounted so that the mounting direction of the main body portion is directed from the first direction and the second direction rotated 180 degrees along the mirror surface of the rearview mirror from the first direction and the display control unit. Is a drive recorder characterized in that the rotation direction of the character information to be displayed on the display unit is set based on the direction of the gravitational acceleration detected by the acceleration detection unit.

Images