JP2002367080A - Method and device for visual support for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a picture of an object photographed by another vehicle so that the picture is easy for the user of this vehicle to use. SOLUTION: By this vehicle visual support method which allows different vehicles 100 to communicate video information to each other and display pictures photographed by other vehicles on the vehicles, position information on one vehicle is sent to the other vehicle and this vehicle receives the picture photographed by the other vehicle and position information on the other vehicle; and a display viewpoint of pictures displayed by this vehicle is previously set on this vehicle and the relative position of the display viewpoint of the picture photographed by the other vehicle to the previously set display viewpoint is calculated according to the position information on this vehicle, the position information on the other vehicle, and camera installation information of the other vehicle. Further, this vehicle converts the picture photographed by the other vehicle into the picture of the previously set display viewpoint and displays the converted picture based on the relative position information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual assisting method for a vehicle and a visual assisting device for a vehicle for displaying an image taken by another vehicle while the own vehicle is driving.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. 7-9886 discloses a vehicular visual assistance device which displays an image taken by another vehicle on a display device of the vehicle while the vehicle is operating. There is an information device.

In this driving information device, each vehicle is provided with a forward monitoring camera and a communication device, and an image in front of the other vehicle taken by the forward monitoring camera of the other vehicle is transmitted using the communication devices of the own vehicle and the other vehicle. In this case, visual information is provided to a driver of the own vehicle by displaying the information on a display device of the own vehicle.

[0004]

However, in the vehicle driving information device as described above, the image displayed on the display device of the own vehicle and taken by the forward monitoring camera of the other vehicle is used to monitor the front of the own vehicle. The display viewpoint is different from the video taken by the camera. Moreover, the information regarding the display viewpoint is not displayed on the display device of the host vehicle.

[0005] For these reasons, it is difficult for the user including the driver of the own vehicle to recognize the position of the subject in the video taken by the surveillance camera of the other vehicle, so that the driving operability of the vehicle is not necessarily improved. I can't say that.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above circumstances, and has a visual aid for a vehicle capable of displaying an image of a subject taken by another vehicle so that a user of the own vehicle can easily recognize the image. It is to provide a method and an apparatus.

[0007]

According to a first aspect of the present invention, there is provided a vehicle vision assisting method for mutually transmitting image information between different vehicles by communication and displaying an image taken by another vehicle in each vehicle. And transmitting the position information of the own vehicle to the other vehicle, receiving the image captured by the other vehicle and the other vehicle position information, and displaying the own vehicle on the own vehicle. The display viewpoint of the image is set in advance, and the position information of the own vehicle, the position information of the other vehicle and the camera installation information of the other vehicle, based on the previously set display viewpoint, The relative position of the display viewpoint is calculated, and the own vehicle further converts an image captured by the other vehicle into an image of the preset display viewpoint based on the relative position information, and displays the converted image. It is characterized in.

According to a second aspect of the present invention, in the first aspect of the present invention, the own vehicle has a plurality of other vehicles obtained by communicating with a plurality of other vehicles and converted to a preset display viewpoint. It is characterized in that an image of a vehicle is combined with one image and displayed.

According to a third aspect of the present invention, in the invention according to the second aspect, when the own vehicle combines images of a plurality of other vehicles converted into a predetermined display viewpoint, the photographing time is new. Alternatively, a video having a high resolution is preferentially used after the conversion to the display viewpoint.

[0010] The invention according to claim 4 is the invention according to claims 1 to 3.
In the invention according to any one of the above, the own vehicle displays information on an inter-vehicle distance between the own vehicle and another vehicle so as to be superimposed on a video.

According to a fifth aspect of the present invention, in the fourth aspect, the information on the inter-vehicle distance between the own vehicle and the other vehicle is based on a transmission / reception time in communication between the own vehicle and the other vehicle. It is characterized by being determined by.

According to a sixth aspect of the present invention, in the invention according to the fourth aspect, the information on the inter-vehicle distance between the own vehicle and another vehicle is based on the position information of the own vehicle and the position information of the other vehicle. It is characterized by being determined by.

According to a seventh aspect of the present invention, there is provided a visual assistance device for a vehicle for mutually transmitting image information between different vehicles by communication and displaying an image taken by another vehicle in each vehicle. A camera that captures the surroundings of the vehicle, a position detection unit that detects the position of the own vehicle, a wireless communication unit that mutually communicates video information, position information, and installation information of the camera between the other vehicles; A storage unit for storing camera installation information in the vehicle and information set in advance with respect to a display viewpoint of an image displayed by the own vehicle, position information of the own vehicle from the position detection unit, obtained by the wireless communication unit; Based on the position information and camera installation information of the other vehicle, and the information of the display viewpoint stored in the storage unit, the video captured by the other vehicle is converted into a video of the preset display viewpoint, and the conversion is performed. I An arithmetic unit for outputting a video signal related to the video, is characterized in that the video signal output by the arithmetic unit is configured to have a display unit for displaying a video image.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the arithmetic unit of the host vehicle is obtained by communication via a wireless communication unit and converted into a preset display viewpoint. A plurality of other vehicle images are combined into one image and displayed.

According to a ninth aspect of the present invention, in the invention according to the eighth aspect, the arithmetic unit of the own vehicle includes a photographing time when synthesizing a plurality of images of other vehicles converted into a predetermined display viewpoint. Is configured to preferentially use a new video or a video having a high resolution after conversion to the display viewpoint.

According to a tenth aspect of the present invention, in the invention according to any one of the seventh to ninth aspects, information on an inter-vehicle distance between the own vehicle and another vehicle is displayed on the display section of the own vehicle. , Which are displayed so as to be superimposed on a video.

According to an eleventh aspect of the present invention, in the invention according to the tenth aspect, the arithmetic unit of the own vehicle transmits information on an inter-vehicle distance between the own vehicle and another vehicle to the own vehicle and the other vehicle. It is configured to be determined based on the transmission / reception time in the communication with the device.

According to a twelfth aspect of the present invention, in the invention of the tenth aspect, the arithmetic unit of the own vehicle includes information on an inter-vehicle distance between the own vehicle and another vehicle as position information of the own vehicle. It is configured to be determined based on the position information of the other vehicle.

The first to twelfth aspects have the following effects.

The image captured by the other vehicle is converted into an image of a predetermined display viewpoint, and the converted image is displayed, so that the user of the own vehicle can easily recognize the subject captured by the other vehicle. Since the display can be performed, the driving operability of the own vehicle can be improved.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a vehicle vision support apparatus according to the present invention.

The vehicle vision support device 10 mounted on the vehicle 100 mutually transmits image information between different vehicles 100 by communication, and the other vehicle 100
A camera 11, a position acquisition unit 12, a wireless communication unit 13, a storage unit 14, and a calculation unit 1.
5 and a display unit 16.

The camera 11 photographs the surroundings of its own vehicle 100 and outputs the video information to the arithmetic unit 15.

The position acquisition unit 12 is a GPS (Global P
ositioning System) is configured to include a receiver, a gyro compass, and the like, detect and acquire the position and direction of the vehicle 100, and output the position information to the arithmetic unit 15.

The wireless communication unit 13 is provided with video information captured by the camera 11 and the position acquisition unit 1 with another vehicle 100.
A request signal and a response signal including the position information of the vehicle 100 acquired by the camera 2 and the camera installation information including the position and angle of the camera 11 installed on the vehicle 100 are mutually communicated. Various kinds of information such as the position information of the vehicle 100 are input and output between the wireless communication unit 13 and the calculation unit 15.

The storage unit 14 stores camera installation information in the own vehicle 100, information set in advance regarding a display viewpoint of an image displayed on the display unit 16 of the own vehicle 100,
The information on the display area that can be displayed on the display unit 16 of the vehicle 100 of the vehicle 100, and the display viewpoint has been changed as described later.
An image or the like captured by the camera 11 of another vehicle 100 is stored. These various information are stored in the storage unit 14 and the arithmetic unit 1
5 is input / output.

The functions of the arithmetic unit 15 are shown in the flowcharts of FIGS. 4 and 5 described later.
The position information of the vehicle 100 detected by the camera 11, the position information of the other vehicle 100 and the camera installation information of the other vehicle 100 acquired by the wireless communication unit 13, and the position information stored in the storage unit 14 in advance. Based on the information on the set display viewpoint, an image captured by another vehicle 100 is coordinate-converted into an image of a preset display viewpoint, and the converted image is output to the storage unit 14 and stored. is there.

That is, the arithmetic unit 15 controls its own vehicle 100
The relative position of the other vehicle 100 with respect to the own vehicle 100 is calculated from the position information of the vehicle 100 and the position information of the other vehicle 100. Then, the arithmetic unit 15 calculates the relative position and the other vehicle 1
Using the camera installation information of 00, the relative position of the display viewpoint of the video taken by the camera 11 of the other vehicle 100 with respect to the preset display viewpoint stored in the storage unit 14 of the vehicle 100 is calculated. . Next, when the relative position of the display viewpoint of the image by the other vehicle 100 is within the display area of the own vehicle 100 stored in the storage unit 14, the calculation unit 15 shoots with the other vehicle 100. Using the relative position of the display viewpoint of the image, the image captured by the other vehicle 100 is coordinate-converted to the image of the preset display viewpoint, and the converted image is output to the storage unit 14 and stored. Let it.

Another main function of the arithmetic section 15 is to convert the image captured by the camera 11 of the plurality of other vehicles 100 into an image of the preset display viewpoint in the same manner as described above, After storing these in the storage unit 14, the stored images of the other vehicle 100 after the coordinate transformation are combined into one image, and the image signal of the combined image is output to the display unit 16. At the time of this combination, a similar plurality of other vehicles 10 stored in the storage unit 14 are stored.
Out of the 0 video, the video whose shooting time is new or the video having a high resolution after the above-described coordinate conversion is preferentially used and synthesized.

The display section 16 displays the video signal output by the arithmetic section 15 as an image. On the display unit 16, information on the inter-vehicle distance between the own vehicle 100 and another vehicle 100 (display of the inter-vehicle distance, a warning of approaching the vehicle 100, and the like) is displayed so as to be superimposed on the synthesized image. Is also good. The inter-vehicle distance is obtained from the relative distance calculated by the calculation unit 15 from the position information of the own vehicle 100 and the position information of another vehicle 100. Alternatively, the inter-vehicle distance is calculated by the calculation unit 15 in a transmission / reception time in communication between the own vehicle 100 and another vehicle 100 (for example, a reply signal is transmitted from the time when the wireless communication unit 13 of the own vehicle 100 transmits a request signal). (Time until reception).

The vehicle vision support device 10 configured as described above is used for the first vehicle 101 and the second vehicle 102 shown in FIG.
And the third vehicle 103, the first vehicle 101
There are a fourth vehicle 104 and a fifth vehicle 105 on which the vehicle vision support device 10 is not mounted, and the second vehicle 102 and the third vehicle 1 are displayed on the display unit 16 of the first vehicle 101.
An example in which images taken by the camera 11 of No. 03 are combined and displayed will be described. In this case, it is assumed that the second vehicle 102 and the third vehicle 103 are at positions where these cameras 11 can capture an image including the blind spot of the first vehicle 101.

(1) Operation of transmitting request signal in first vehicle 101 (FIG. 4) The position acquisition unit 12 of the first vehicle 101
1 and the direction of the first vehicle 1 as position information.
01 (S1).

The arithmetic unit 15 of the first vehicle 101 outputs a request signal including the position information of the first vehicle 101 obtained in step S1 to the wireless communication unit 13 of the first vehicle 101. Then, the wireless communication unit 13 of the first vehicle 101
Transmits the request signal including the position information to the second vehicle 102 and the third vehicle 103 (S2), and thereafter executes a standby for receiving a reply signal (S3).

(2) Second vehicle 10 receiving the request signal
Operation of Second and Third Vehicles 103 (FIG. 5) Each of the wireless communication units 13 of the second and third vehicles 102 and 103 is executing standby for receiving a request signal (S
4) It is determined whether the request signal transmitted from the first vehicle 101 can be received (S5).

If the request signal can be received, the position acquisition unit 12 of the second vehicle 102 acquires the position and orientation of the second vehicle 102 and outputs the acquired position and orientation to the calculation unit 15 of the second vehicle 102. Further, the position acquisition unit 12 of the third vehicle 103 acquires the position and the direction of the third vehicle 103, and
03 (S6).

Further, the calculation unit 15 of the second vehicle 102 inputs the camera installation information of the second vehicle 102 stored in the storage unit 14 of the second vehicle 102 in advance, and the third vehicle 1
03 of the third vehicle 103 is stored in the storage unit 14 of the third vehicle 103.
The camera installation information of the third vehicle 103 stored in advance is input (S6).

In step S5, if the request signal cannot be received, the wireless communication units 13 of the second vehicle 102 and the third vehicle 103 execute standby for receiving the request signal (S4).

Using the received position information of the first vehicle 101, the position information of the second vehicle 102, and the camera installation information of the second vehicle 102, the arithmetic unit 15 of the second vehicle 102 Is captured by the first vehicle 10
1 or not, that is, whether or not the camera 11 of the second vehicle 102 can capture an image of a position around the first vehicle 101 or a direction related to the traveling of the first vehicle 101 (S7). .

Similarly, the calculation unit 15 of the third vehicle 103
Also, the received position information of the first vehicle 101 and the third vehicle 10
Using the position information of No. 3 and the camera installation information of the third vehicle 103, the image captured by the camera 11 of the third vehicle 103 is
It is determined whether it is valid for the first vehicle 101 (S
7).

In step S7, when the arithmetic unit 15 of the second vehicle 102 determines that the image of the second vehicle 102 by the camera 11 is valid for the first vehicle 101, the camera 11 of the second vehicle 102 2 The surroundings of the vehicle 102 are photographed, and the video information is
5 (S8). Thereafter, the wireless communication unit 13 of the second vehicle 102 transmits a response signal including the video signal from the camera 11 of the second vehicle 102, the position information of the second vehicle 102, and the camera installation information of the second vehicle 102 to the first vehicle 101. (S9).

Similarly, when the calculation unit 15 of the third vehicle 103 determines that the image of the third vehicle 103 by the camera 11 is valid for the first vehicle 101, the camera 11 of the third vehicle 103 The surroundings of the vehicle 103 are photographed, and the video information is output to the calculation unit 15 of the third vehicle 103 (S
8). After that, the wireless communication unit 13 of the third vehicle 103 transmits the video information by the camera 11 of the third vehicle 103, the third vehicle 1
A response signal including the position information of the third vehicle 103 and the camera installation information of the third vehicle 103 is transmitted to the first vehicle 101 (S9).

In step S7, the second vehicle 102,
If the image of each camera 11 of the third vehicle 103 is valid for the first vehicle 101, the second vehicle 102,
If the calculation units 15 of the third vehicle 103 do not make a determination, the wireless communication units 13 of the second vehicle 102 and the third vehicle 103 execute reception standby again (S).
4).

(3) The first vehicle 10 receiving the reply signal
Operation 1 (FIG. 4) The wireless communication unit 13 of the first vehicle 101 determines whether or not the response signal transmitted from the second vehicle 102 can be received (S1).
0), if receivable, the received video information, position information and camera installation information of the second vehicle 102 are transmitted to the first vehicle 101
Is output to the calculation unit 15.

The calculation unit 15 of the first vehicle 101 calculates the position information of the first vehicle 101 and the position information of the second vehicle 102 from
The relative position of the second vehicle 102 with respect to the first vehicle 101 is calculated (S11).

Next, the arithmetic unit 15 of the first vehicle 101 inputs a preset display viewpoint of the video image displayed on the display unit 16 from the storage unit 14 and obtains the second vehicle determined in step S11. Using the relative position of the second vehicle 102 and the camera installation information of the second vehicle 102, the relative position of the video viewpoint of the image captured by the camera 11 of the second vehicle 102 with respect to the preset display viewpoint is calculated (S12).

After that, the calculation unit 15 of the first vehicle 101
The information of the display area that can be displayed on the display unit 16 is stored in the storage unit 14.
It is determined whether or not the relative position of the display viewpoint of the image of the second vehicle 102 is within the display area (S1).
3).

When it is within the display area in step S13, the arithmetic unit 15 of the first vehicle 101 uses the relative position of the display viewpoint in the image of the second vehicle 102 to calculate the position of the image of the second vehicle 102. , Azimuth, scale, etc., the image of the second vehicle 102 is coordinate-converted into the image of the preset display viewpoint, and the converted image is converted to the first image.
The information is stored in the storage unit 14 of the vehicle 101 (S14).

The above-described steps S10 to S14 are similarly executed for the response signal transmitted from the third vehicle 103, and the coordinates of the third vehicle 103 converted into the image of the display viewpoint set in advance are converted. The video is displayed on the first vehicle 101
Is stored in the storage unit 14.

Finally, the calculation unit 15 of the first vehicle 101
Of the images of the second vehicle 102 and the third vehicle 103 whose coordinates of the display viewpoint are stored in the storage unit 14 of the first vehicle 101, the image of the new shooting time or the image of high resolution after conversion to the display viewpoint is displayed. Priority is given to these second vehicles 102
Then, the video of the third vehicle 103 is synthesized (S15).

When the calculation unit 15 of the first vehicle 101 outputs the video signal of the synthesized video to the display unit 16 of the first vehicle 101, the display unit 16 displays the synthesized video (S1).
6).

FIG. 3C shows the display unit 1 of the first vehicle 101.
6 shows the composite image displayed. In FIG. 3C,
The display viewpoint of a preset image displayed on the display unit 16 of the first vehicle 101 is from behind the first vehicle 101.
The viewpoint is set so as to face the first vehicle 101, and the first vehicle 101
The blind spot of the vehicle 101 is reduced.

On the other hand, FIG. 3A shows an image before the coordinate transformation, which is taken by the camera 11 of the second vehicle 102 and transmitted to the first vehicle 101. The first vehicle 101 and the fourth vehicle 104 viewed from behind are shown in the photographing frame A. FIG.
(B) shows a state in which the camera 11 of the third vehicle 103 shoots the first
5 is an image before coordinate conversion transmitted to the vehicle 101. The first vehicle 101 and the fifth vehicle 10 viewed from behind in the photographing frame B
5 is shown.

In order to create the composite image shown in FIG. 3C, the positions, orientations and scales of the photographing frames A and B are
Based on the relative positions of the display viewpoints of the images shot by the second vehicle 102 and the third vehicle 103, the same subject (eg, the first vehicle 101) in the image of the shooting frame A and the image of the shooting frame B overlaps. Is adjusted by coordinate transformation. That is, since the photographing frame A photographs the left side of the photographing frame B, the photographing frame A is arranged on the left side of the photographing frame B in the display frame C of the composite video in FIG. In addition, shooting frame A
Is photographed at a shorter distance than the photographing frame B, and is therefore reduced in the display frame C compared to the photographing frame B.

With the above-described configuration, the above-described embodiment has the following advantages.

The vehicle vision support device 10 of the first vehicle 101
Then, the video captured by the camera 11 of the second vehicle 102 and the third vehicle 103 is converted into a video of a preset display viewpoint, and the converted video is displayed on the display unit 16. 102, the subject photographed by the camera 11 of the third vehicle 103 can be displayed so that the user (including the driver) of the first vehicle 101 can easily recognize it. As a result, the driving operability of the first vehicle 101 can be improved,
The traveling safety of the vehicle can be improved.

Although the present invention has been described based on the above embodiment, the present invention is not limited to this.

For example, in the above embodiment, the second vehicle 1
02, the case where a composite video is created by combining two videos taken by the camera 11 of the third vehicle 103 has been described, but three or more taken by the camera 11 of three or more vehicles have been described. A composite video may be created from the video.

For example, the camera 11 of the second vehicle 102
Only the video taken at the display section 16 of the first vehicle 101
Is displayed on the camera 1 without synthesizing only the video image obtained by converting the display viewpoint of the video image with other video images.
1 may be displayed on the display unit 16.

[0060]

According to the visual support method for a vehicle according to the first aspect of the present invention, it is possible to display an image of a subject taken by another vehicle so that a user of the own vehicle can easily recognize the image.

According to the vision assisting device for a vehicle according to the seventh aspect of the present invention, an image of a subject taken by another vehicle can be
It can be displayed so that the user of the own vehicle can easily recognize it.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a vehicular visual assistance device according to the present invention.

FIG. 2 is an overhead view showing a positional relationship of a vehicle equipped with the vehicle vision support device of FIG. 1;

FIG. 3 is a diagram showing an image captured by a vehicular visual assistance device mounted on the vehicle of FIG. 2;

FIG. 4 is a flowchart executed by the vehicular vision support device in the vehicle (first vehicle 101) on the video receiving side.

FIG. 5 is a flowchart executed by a vehicular visual assistance device in a vehicle (a second vehicle 102, a third vehicle 103) on a video transmission side.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 vehicle visual support device 11 camera 12 position acquisition unit 13 wireless communication unit 14 storage unit 15 calculation unit 16 display unit 100 vehicle 101 first vehicle 102 second vehicle 103 third vehicle A, B shooting frame C display frame

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60R 21/00 624 B60R 21/00 624C 624G 624H 626 626E 628 628C F-term (Reference) 3D020 BA04 BA09 BA20 BC01 BD05 3D044 BA14 BA21 BB01 BD01 BD13 5H180 AA01 BB04 CC04 FF04 FF05 FF07 FF22 FF27 FF32 FF38

Claims (12)

[Claims] 1. A vehicular visual assistance method for mutually transmitting image information between different vehicles by communication and displaying an image taken by another vehicle in each vehicle, wherein position information of the own vehicle is transmitted to another vehicle. While transmitting, the own vehicle receives the image captured by the other vehicle and the position information of the other vehicle. In the own vehicle, the display viewpoint of the image displayed by the own vehicle is set in advance, and the own vehicle's display viewpoint is set. Based on the position information, the position information of the other vehicle and the camera installation information of the other vehicle,
The relative position of the display viewpoint of the image taken by the other vehicle with respect to the previously set display viewpoint is calculated, and in the own vehicle, the image taken by the other vehicle is set in advance based on the relative position information. A visual assistance method for a vehicle, comprising: converting the image into a video of the display viewpoint; and displaying the converted video. 2. The self-vehicle according to claim 1, wherein a plurality of other vehicle images obtained by communication with a plurality of other vehicles and converted to a preset display viewpoint are combined into one image and displayed. The visual support method for a vehicle according to claim 1, wherein: 3. The self-vehicle, when combining images of a plurality of other vehicles converted to a predetermined display viewpoint, gives priority to an image with a new shooting time or a high-resolution image after conversion to the display viewpoint. The visual support method for a vehicle according to claim 2, wherein the visual support method is used. 4. The vehicle according to claim 1, wherein the own vehicle displays information on an inter-vehicle distance between the own vehicle and another vehicle so as to be superimposed on an image. Visual assistance method. 5. The vehicle according to claim 4, wherein the information on the inter-vehicle distance between the host vehicle and another vehicle is determined based on a transmission / reception time in communication between the host vehicle and the other vehicle. For visual assistance method. 6. The vehicle according to claim 4, wherein the information on the inter-vehicle distance between the host vehicle and the other vehicle is determined based on the position information of the host vehicle and the position information of the other vehicle. For visual assistance method. 7. A visual assistance device for a vehicle for mutually transmitting video information between different vehicles by communication and displaying a video captured by another vehicle in each vehicle, comprising: a camera for capturing images around the own vehicle; A position detection unit that detects the position of the own vehicle, a wireless communication unit that mutually communicates image information, position information, and the installation information of the camera between other vehicles; A storage unit for storing preset information regarding a display viewpoint of an image displayed by the own vehicle; position information of the own vehicle from the position detection unit; position information of the other vehicle obtained by the wireless communication unit And, based on the camera installation information and the information of the display viewpoint stored in the storage unit, the image captured by the other vehicle is converted into the image of the preset display viewpoint, and the image signal related to the converted image is converted. An arithmetic unit for outputting a vehicular visual assistance system, characterized in that the output video signal is configured to have a display unit for displaying a picture at the operation unit. 8. The operation unit of the host vehicle combines a plurality of other vehicle images obtained by communication via a wireless communication unit and converted into a preset display viewpoint into one image. The visual assistance device for a vehicle according to claim 7, wherein the visual assistance device is configured to display. 9. The arithmetic unit of the host vehicle, when synthesizing a plurality of images of other vehicles converted to a preset display viewpoint,
The visual assistance device for a vehicle according to claim 8, wherein a video having a new shooting time or a video having a high resolution after conversion to the display viewpoint is preferentially used. 10. The information display device according to claim 7, wherein information on an inter-vehicle distance between the own vehicle and another vehicle is superimposed on a video image on the display unit of the own vehicle. 4. The visual support device for a vehicle according to claim 1. 11. The arithmetic unit of the host vehicle is configured to determine information on an inter-vehicle distance between the host vehicle and another vehicle based on a transmission / reception time in communication between the host vehicle and the other vehicle. The vehicle vision support device according to claim 10, wherein: 12. The calculation unit of the host vehicle is configured to determine information on an inter-vehicle distance between the host vehicle and another vehicle based on the position information of the host vehicle and the position information of the other vehicle. The vehicle vision support device according to claim 10, wherein: