IMAGE DISPLAY APPARATUS
An image display apparatus has: a synthesizing device (132) for synthesizing a rear image (111B) captured by a rear imaging device (11B) for imaging rear area of a first vehicle (1) and a rear side image (111BL, 111BR) captured by a rear side imaging device (11BL, 11BR) for imaging rear side area of the first vehicle to generate a synthesized image (111C); and a display (14) for displaying the synthesized image. The synthesizing device varies a proportion of each of a rear image area and a rear side image area to the synthesized image based on velocity of the first vehicle and/or a distance between the first vehicle and a second vehicle existing at the rear of the first vehicle, wherein the rear image area and the rear side image area are areas in which the rear image and the rear side image are displayed, respectively, in the synthesized image.
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This application is a continuation of U.S. application Ser. No. 16/204,485 filed Nov. 29, 2018 (allowed), which claims benefit of priority of Japanese Patent Application No. 2017-243705, filed on Dec. 20, 2017. The entire disclosures of the prior applications including the specification, drawings and abstract are incorporated herein by reference in their entirety.
TECHNICAL FIELDThe present invention relates to a technical field of an image display apparatus that is configured to synthesize images that are captured by a plurality of imaging devices placed at a vehicle and to display the synthesized image, for example.
BACKGROUND ARTEach of a Patent Literature 1 and a Patent Literature 2 discloses one example of an image display apparatus. Specifically, the Patent Literature 1 discloses an image display apparatus that is configured to generate a synthesized image by synthesizing a rear side image (a rear and lateral image) that is captured by a camera configured to image a rear side area (a rear and lateral area) of a target vehicle and a rear image that is captured by a camera configured to image a rear area of the target vehicle seamlessly at the rear of the target vehicle so that the synthesized image is an image obtained by taking a view of the rear surroundings of the target vehicle from a virtual viewpoint and to display the generated synthesized image on a display apparatus of a vehicle interior mirror. The Patent Literature 2 discloses an image display apparatus that is configured to trim (crop) a rear right image that is captured by a camera configured to image a rear right area of a target vehicle and a rear left image that is captured by a camera configured to image a rear left area of the target vehicle on the basis of a distance between the target vehicle and a rear vehicle that travels at the rear of the target vehicle, to generate a synthesized image by synthesizing the trimmed rear left image and the trimmed rear right image and to display the generated synthesized image.
CITATION LIST Patent Literature
- [Patent Literature 1] Japanese Unexamined Patent Application Publication No. 2008-230558
- [Patent Literature 2] Japanese Unexamined Patent Application Publication No. 2006-338566
The image display apparatus disclosed in the Patent Literature 1 synthesizes the rear side image and the rear image without considering an existence of a rear vehicle that travels at the rear of the target vehicle. Therefore, the image display apparatus disclosed in the Patent Literature 1 has a technical problem that there is a possibility that the image display apparatus is not allowed to synthesize the rear side image and the rear image to generate the synthesized image in which a visibility of the rear vehicle is secured appropriately when there is the rear vehicle.
On the other hand, the image display apparatus disclosed in the Patent Literature 2 adjusts a trimmed amount of each of the rear right image and the rear left image so that the rear vehicle does not duplicate when the image display apparatus generates the synthesized image. However, visibility of the rear vehicle is not necessarily secured in the synthesized image only by adjusting the trimmed amount so that the rear vehicle does not duplicate. Thus, the image display apparatus disclosed in the Patent Literature 2 also has a technical problem that there is a possibility that the image display apparatus is not allowed to synthesize the rear right image and the rear left image to generate the synthesized image in which the visibility of the rear vehicle is secured appropriately when there is the rear vehicle.
The above described technical problem is one example of the technical problem to be solved by the present invention. It is therefore an object of the present invention to provide, for example, an image display apparatus that is configured to generate a synthesized image by synthesizing a plurality of images that are captured by a plurality of imaging devices placed at a first vehicle, respectively, and that is configured to generate the synthesized image in which a visibility of a second vehicle is secured appropriately when there is the second vehicle at the rear of the first vehicle.
Solution to ProblemA first aspect of an image display apparatus of the present invention is provided with: a synthesizing device that is configured to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imaging device that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imaging device that is configured to image a rear side area located at the rear and the side of the first vehicle; and a displaying device that is configured to display the synthesized image, the synthesizing device is configured to vary a proportion of each of a rear image area and a rear side image area to the synthesized image on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the rear image area is an area in which the rear image is displayed in the synthesized image and the rear side image area is an area in which the rear side image is displayed in the synthesized image, when the synthesizing device generates the synthesized image.
A second aspect of an image display apparatus of the present invention is provided with: a synthesizing device that is configured to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imaging device that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imaging device that is configured to image a rear side area located at the rear and the side of the first vehicle; and a displaying device that is configured to display the synthesized image, the synthesizing device is configured to vary an image angle of each of a first image part and a second image part on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the first image part is an image part that is one portion of the synthesized image and that corresponds to the rear image and the second image part is an image part that is one portion of the synthesized image and that corresponds to the rear side image, when the synthesizing device generates the synthesized image.
Each of
Each of
Hereinafter, with reference to drawings, one embodiment of the image display apparatus of the present invention will be described. In the following description, a vehicle 1 to which one embodiment of the image display apparatus of the present invention is adapted will be described.
(1) Structure of Vehicle 1
Firstly, with reference to
As illustrated in
The rear camera 11B is an imaging device that is configured to image (in other words, capture an image of) a rear area located at the rear (especially, just at the rear) of the vehicle 1 (namely, located at a backward position viewed from the vehicle 1), as illustrated in
The rear left camera 11BL is an imaging device that is configured to image a rear left area located at the rear of the vehicle 1 (especially, at the rear of the vehicle 1 and at the left of the vehicle 1, namely, at a backward and leftward position viewed from the vehicle 1), as illustrated in
The rear right camera 11BR is an imaging device that is configured to image a rear right area located at the rear of the vehicle 1 (especially, at the rear of the vehicle 1 and at the right of the vehicle 1, namely, at a backward and rightward position viewed from the vehicle 1), as illustrated in
The rear vehicle sensor 12 is a detecting device that is configured to detect another vehicle 2 that is located at the rear of the vehicle 1 (here, “at the rear of the vehicle 1” means a position in the rear area imaged by the rear camera 11B (in other words, a position in the imaging range IRB), same applies to the following description). Hereinafter, another vehicle 2 is referred to as a “rear vehicle 2”. The rear vehicle sensor 12 includes at least one of a radar, a LIDAR (Light Detection and Ranging) and a camera, for example. Note that at least one of the rear camera 11B, the rear left camera 11BL and the rear right camera 11BR may be used as the rear vehicle sensor 12.
The ECU 13 is configured to control entire operation of the vehicle 1. Especially in the present embodiment, the ECU 13 is configured to execute an image display operation for displaying, at the display 14, a rear image 111B, a rear left image 111BL and a rear right image 111BR. The rear image 111B is an image that is captured by the rear camera 11B (namely, an image indicating a circumstance of the rear area). The rear left image 111BL is an image that is captured by the rear left camera 11BL (namely, an image indicating a circumstance of the rear left area). The rear right image 111BR is an image that is captured by the rear right camera 11BR (namely, an image indicating a circumstance of the rear right area). In order to perform the image display operation, the ECU 13 includes, as processing blocks that are logically realized in the ECU 13, an image collecting unit 131 and an image synthesizing unit 132 that is one example of a “synthesizing device” in the below described additional statement.
The image collecting unit 131 is configured to collect the rear image 111B, the rear left image 111BL and the rear right image 111BR from the rear camera 11B, the rear left camera 11BL and the rear right camera 11BR, respectively.
The image synthesizing unit 132 is configured to generate a synthesized image 111C by executing an image synthesizing process for synthesizing the rear image 111B, the rear left image 111BL and the rear right image 111BR. Specifically, the image synthesizing unit 132 is configured to extract, from the rear image 111B, a rear image 112B corresponding to an image part that is at least one portion of the rear image 111B by trimming (in other words, cropping) the rear image 111B. Moreover, the image synthesizing unit 132 is configured to extract, from the rear left image 111BL, a rear left image 112BL corresponding to an image part that is at least one portion of the rear left image 111BL by trimming the rear left image 111BL. Moreover, the image synthesizing unit 132 is configured to extract, from the rear right image 111BR, a rear right image 112BR corresponding to an image part that is at least one portion of the rear right image 111BR by trimming the rear right image 111BR. Then, the image synthesizing unit 132 is configured to generate the synthesized image 111C in which the rear left area is located on the left of the rear area and the rear right area is located on the right of the rear area. Namely, the image synthesizing unit 132 is configured to generate the synthesized image 111C in which the rear left image 112BL is located on the left of the rear image 112B and the rear right image 112BR is located on the right of the rear image 112B, as illustrated in
Furthermore, the image synthesizing unit 132 is configured to control the display 14 to display the generated synthesized image 111C.
Note that the display 14 is placed in the vehicle interior of the vehicle 1 and is configured to display the synthesized image 111C to an occupant (in other words, a person or a driver) of the vehicle 1 in the vehicle interior.
(2) Flow of Image Display Operation
Next, with reference to
As illustrated in
As a result of the determination at the step S11, if it is determined that the rear vehicle 2 does not exist (namely, the rear vehicle 2 is not detected by the rear vehicle sensor 12) (the step S11: No), the image synthesizing unit 132 sets a rear image angle θB that is a parameter relating to the rear image 112B to a predetermined normal image angle θB_N (a step S14). Moreover, the image synthesizing unit 132 sets a rear left image angle θBL that is a parameter relating to the rear left image 112BL to a predetermined normal image angle θBL_N (the step S14). Moreover, the image synthesizing unit 132 sets a rear right image angle θBR that is a parameter relating to the rear right image 112BR to a predetermined normal image angle θBR_N (the step S14).
The rear image angle θB is a parameter that represents, as an angle from a virtual viewpoint, an extracted area of the rear image 112B in the rear image 111B (namely, an area in the rear image 111B from which the rear image 112B is extracted). In other words, the rear image angle θB is a parameter that represents, as the angle from the virtual viewpoint, a range of a scene included in the rear image 112B. Specifically, as illustrated in
Same applies to the rear left image angle θBL and the rear right image angle θBR, as with the rear image angle θB. Namely, the rear left image angle θBL is a parameter that represents, as an angle (an angle in the horizontal direction in the present embodiment) from the virtual viewpoint, an extracted area of the rear left image 112BL in the rear left image 111BL (in other words, a range of a scene included in the rear left image 112BL). Similarly, the rear right image angle θBR is a parameter that represents, as an angle (an angle in the horizontal direction in the present embodiment) from the virtual viewpoint, an extracted area of the rear right image 112BR in the rear right image 111BR (in other words, a range of a scene included in the rear right image 112BR).
On the other hand, as a result of the determination at the step S11, if it is determined that the rear vehicle 2 exists (namely, the rear vehicle 2 is detected by the rear vehicle sensor 12) (the step S11: Yes), the image synthesizing unit 132 further determines whether or not a distance from the vehicle 1 to the rear vehicle 2 is shorter than a predetermined threshold value TH1 (a step S12). Hereinafter, the distance from the vehicle 1 to the rear vehicle 2 is referred to as an “inter-vehicular distance L12”.
As a result of the determination at the step S12, if it is determined that the inter-vehicular distance L12 is longer than the threshold value TH1 (the step S12: No), the image synthesizing unit 132 sets the rear image angle θB to the normal image angle θB_N, sets the rear left image angle θBL to the normal image angle θBL_N and sets the rear right image angle θBR to the normal image angle θBR_N (the step S14).
On the other hand, as a result of the determination at the step S12, if it is determined that the inter-vehicular distance L12 is shorter than the threshold value TH1 (the step S12: Yes), the image synthesizing unit 132 sets the rear image angle θB to a predetermined large image angle (in other words, a wide image angle) θB_L that is larger (in other words, wider) than the normal image angle θB_N (a step S13). Moreover, the image synthesizing unit 132 sets the rear left image angle θBL to a predetermined small image angle (in other words, a narrow image angle) θBL_S that is smaller (in other words, narrower) than the normal image angle θBL_N (the step S13). Moreover, the image synthesizing unit 132 sets the rear right image angle θBR to a predetermined small image angle θBR_S that is smaller than the normal image angle θBR_N (the step S13).
Note that the threshold value TH1 is used to determine (i) whether the rear image angle θB is set to the normal image angle θB_N or the large image angle θB_L, (ii) whether the rear left image angle θBL is set to the normal image angle θBL_N or the small image angle θBL_S and (iii) whether the rear right image angle θBR is set to the normal image angle θBR_N or the small image angle θBR_S. Thus, the threshold value TH1 is set to an appropriate value that allows the image synthesizing unit 132 to distinguish, on the basis of the inter-vehicular distance L12, a state where the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR are preferably set to the normal image angle θB_N, the normal image angle θBL_N and the normal image angle θBR_N, respectively, from a state where the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR are preferably set to the large image angle θB_L, the small image angle θBL_S and the small image angle θBR_S.
Then, the image synthesizing unit 132 extracts, as the rear image 112B, an image part corresponding to the rear image angle θB set at the step S13 or the step S14 from the rear image 111B (a step S15). For example, when the rear image angle θB is set to the normal image angle θB_N, the image synthesizing unit 132 extracts, as the rear image 112B, a relatively small image part corresponding to the normal image angle θB_N from the rear image 111B, as illustrated in
Moreover, the image synthesizing unit 132 extracts, as the rear left image 112BL, an image part corresponding to the rear left image angle θBL set at the step S13 or the step S14 from the rear left image 111BL (the step S15). Moreover, the image synthesizing unit 132 extracts, as the rear right image 112BR, an image part corresponding to the rear right image angle θBR set at the step S13 or the step S14 from the rear right image 111BR (the step S15). For example, when the rear left image angle θBL is set to the normal image angle θBL_N, the image synthesizing unit 132 extracts, as the rear left image 112BL, a relatively large image part corresponding to the normal image angle θBL_N from the rear left image 111BL, as illustrated in
Then, the image synthesizing unit 132 generates the synthesized image 111C in which the rear left image 112BL is located on the left of the rear image 112B and the rear right image 112BR is located on the right of the rear image 112B by using the rear image 112B, the rear left image 112BL and the rear right image 112BR extracted at the step S15 (a step S16). Note that the image synthesizing unit 132 may execute, as one portion of the image synthesizing process, at least one of an observing point converting process, an image rotating process, a scaling process and an image shape forming process so that the rear image 112B, the rear left image 112BL and the rear right image 112BR are seamlessly connected in the synthesizing image 111C when the image synthesizing unit 132 generates the synthesized image 111C. The observing point converting process is a process for converting an observing point (in other words, a viewpoint) of at least one of the rear image 111B, the rear image 112B, the rear left image 111BL, the rear left image 112BL, the rear right image 111BR and the rear right image 112BR. The image rotating process is a process for rotating at least one of the rear image 111B, the rear image 112B, the rear left image 111BL, the rear left image 112BL, the rear right image 111BR and the rear right image 112BR. The scaling process is a process for scaling (in other words, expanding and/or minifying) at least one of the rear image 111B, the rear image 112B, the rear left image 111BL, the rear left image 112BL, the rear right image 111BR and the rear right image 112BR. The image shape forming process is a process for converting (changing) a shape of at least one of the rear image 111B, the rear image 112B, the rear left image 111BL, the rear left image 112BL, the rear right image 111BR and the rear right image 112BR.
The rear image 112B when the rear image angle θB is set to the large image angle θB_L is larger than the rear image 112B when the rear image angle θB is set to the normal image angle θB_N. Thus, the image synthesizing unit 132 generates the synthesized image 111C so that a proportion of an area of the rear image 112B to the synthesized image 111C (in other words, a proportion of a rear image area to the synthesized image 111C, wherein the rear image area is one portion of the synthesized image 111C and is an area in which the rear image 112B is displayed) when the rear image angle θB is set to the large image angle θB_L is larger than the proportion when the rear image angle θB is set to the normal image angle θB_N. Namely, the image synthesizing unit 132 generates the synthesized image 111C so that the proportion of the area of the rear image 112B to the synthesized image 111C becomes larger as the rear image angle θB becomes larger. On the other hand, the rear left image 112BL when the rear left image angle θBL is set to the small image angle θBL_S is smaller than the rear left image 112BL when the rear left image angle θBL is set to the normal image angle θBL_N. Moreover, the rear right image 112BR when the rear right image angle θBR is set to the small image angle θBR_S is smaller than the rear right image 112BR when the rear right image angle θBR is set to the normal image angle θBR_N. Thus, the image synthesizing unit 132 generates the synthesized image 111C so that a proportion of an area of the rear left image 112BL to the synthesized image 111C (in other words, a proportion of a rear left image area to the synthesized image 111C, wherein the rear left image area is one portion of the synthesized image 111C and is an area in which the rear left image 112BL is displayed) when the rear left image angle θBL is set to the small image angle θBL_S is smaller than the proportion when the rear left image angle θBL is set to the normal image angle θBL_N. Moreover, the image synthesizing unit 132 generates the synthesized image 111C so that a proportion of an area of the rear right image 112BR to the synthesized image 111C (in other words, a proportion of a rear right image area to the synthesized image 111C, wherein the rear right image area is one portion of the synthesized image 111C and is an area in which the rear right image 112BR is displayed) when the rear right image angle θBR is set to the small image angle θBR_S is smaller than the proportion when the rear right image angle θBR is set to the normal image angle θBR_N. Namely, the image synthesizing unit 132 generates the synthesized image 111C so that the proportion of the area of the rear left image 112BL to the synthesized image 111C becomes smaller as the rear left image angle θBL becomes smaller and the proportion of the area of the rear right image 112BR to the synthesized image 111C becomes smaller as the rear right image angle θBR becomes smaller. Note that
Then, the display 14 displays the synthesized image 111C generated at the step S16 (a step S17).
In the above described description, if it is determined that the inter-vehicular distance L12 is same as the threshold value TH1 as a result of the determination at the step S12, the image synthesizing unit 132 executes the process that is executed when it is determined that the inter-vehicular distance L12 is longer than the threshold value TH1. However, if it is determined that the inter-vehicular distance L12 is same as the threshold value TH1, the image synthesizing unit 132 may execute the process that is executed when it is determined that the inter-vehicular distance L12 is shorter than the threshold value TH1.
(3) Technical Effect
As described above, the image display operation in the present embodiment is capable of generating the synthesized image 111C in which a visibility of the rear vehicle 2 is secured more appropriately when the rear vehicle 2 exists, compared to an image display operation in a comparison example in which the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR are fixed and the proportion of the area of each of the rear image 112B, the rear left image 112BL and the rear right image 112BR to the synthesized image 111C is fixed regardless of the existence/non-existence of the rear vehicle 2 and the inter-vehicular distance L12.
Specifically, when the inter-vehicular distance L12 is longer than the threshold value TH1 (namely, the rear vehicle 2 is relatively distant from the vehicle 1), the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR are set to the normal image angle θB_N, the normal image angle θBL_N and the normal image angle θBR_N, respectively. Thus, the synthesized image 111C illustrated in
Then, the rear vehicle 2 becomes larger in the synthesized image 111C as the rear vehicle 2 approaches the vehicle 1 more. Here, if the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR are fixed regardless of the inter-vehicular distance L12, there is a possibility that at least one portion of the rear vehicle 2 is missing in an image part of the synthesized image 111C that corresponds to the rear image 112B as illustrated in
On the other hand, in the present embodiment, the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR vary on the basis of the inter-vehicular distance L12 and the proportion of the area of each of the rear image 112B, the rear left image 112BL and the rear right image 112BR to the synthesized image 111C varies. Specifically, the rear image angle θB becomes larger at the timing when the rear vehicle 2 approaches the vehicle 1 to some extent, and the rear left image angle θBL and the rear right image angle θBR becomes smaller in response to the increase of the rear image angle θB. Moreover, the proportion of the area of the rear image 112B to the synthesized image 111C increases at the timing when the rear vehicle 2 approaches the vehicle 1 to some extent, and the proportion of the area of each of the rear left image 112BL and the rear right image 112BR to the synthesized image 111C decreases in response to the increase of the proportion of the area of the rear image 112B to the synthesized image 111C. As a result, after the rear vehicle 2 approaches the vehicle 1 to some extent, the display 14 displays the synthesized image 111C that displays the rear image 112B by using a relatively large area due to the increase of the proportion of the area of the rear image 112B to the synthesized image 111C, as illustrated in
(4) Modified Example
Next, modified examples of the image display operation will be described.
(4-1) First Modified Example of Image Display Operation
With reference to
As illustrated in
On the other hand, if it is determined that the rear vehicle 2 exists (the step S11: Yes), the image synthesizing unit 132 sets the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR on the basis of the distance from the vehicle 1 to the rear vehicle 2 (namely, the inter-vehicular distance L12) (a step S21).
Specifically, the image synthesizing unit 132 sets the rear image angle θB so that the rear image angle θB becomes larger as the inter-vehicular distance L12 becomes shorter. In this case, the image synthesizing unit 132 may set the rear image angle θB so that the rear image angle θB becomes larger sequentially as the inter-vehicular distance L12 becomes shorter, as illustrated in
On the other hand, the image synthesizing unit 132 sets the rear left image angle θBL and the rear right image angle θBR so that the rear left image angle θBL and the rear right image angle θBR become smaller as the inter-vehicular distance L12 becomes shorter. In this case, the image synthesizing unit 132 may set the rear left image angle θBL and the rear right image angle θBR so that the rear left image angle θBL and the rear right image angle θBR become smaller sequentially as the inter-vehicular distance L12 becomes shorter, as illustrated in
Then, the processes from the step S15 to the step S17 are executed also in the modified example.
The above described first modified example of the image display operation is capable of achieving the effect that is same as the effect achieved by the above described image display operation in the present embodiment.
(4-2) Second Modified Example of Image Display Operation
In the above described description, the image synthesizing unit 132 sets the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR on the basis of the inter-vehicular distance L12. On the other hand, in the second modified example, the image synthesizing unit 132 sets the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR on the basis of a velocity V of the vehicle 1 in addition to or instead of the inter-vehicular distance L12.
Specifically, the image synthesizing unit 132 determines whether or not the velocity V is lower than a predetermined threshold value TH2 at the step S12 in
Alternatively, the image synthesizing unit 132 may set the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR so that the rear image angle θB becomes larger and the rear left image angle θBL and the rear right image angle θBR become smaller as the velocity V becomes lower at the step S21 in
The above described second modified example of the image display operation is capable of achieving the effect that is same as the effect achieved by the above described image display operation in the present embodiment. The reason is as follows. If the velocity V of the vehicle 1 is relatively low, there is a higher possibility that the rear vehicle 2 approaches the vehicle 1 more, and thus, the inter-vehicular distance L12 becomes shorter relatively easily. Thus, when the velocity V is relatively low, there is a possibility that at least one portion of the rear vehicle 2 is missing in the image part of the synthesized image 111C that corresponds to the rear image 112B, as with the case where the inter-vehicular distance L12 is relatively short. However, in the second modified example, the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR vary on the basis of the velocity V. As a result, after the rear vehicle 2 approaches the vehicle 1 to some extent, the display 14 displays the synthesized image 111C that displays the rear image 112B including the scene spreading in the relatively wide field (area or space) by using the relatively large area. Thus, the second modified example of the image display operation is also capable of generating the synthesized image 111C in which the visibility of the rear vehicle 2 is secured.
(4-3) Another Modified Example
In the above described description, the image synthesizing unit 132 extracts the rear image 112B corresponding to the rear image angle θB, the rear left image 112BL corresponding to the rear left image angle θBL and the rear right image 112BR corresponding to the rear right image angle θBR from the rear image 111B, the rear left image 111BL and the rear right image 111BR, respectively. Namely, the image synthesizing unit 132 generates the synthesized image 111C corresponding to the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR by executing an image process (an image processing) based on the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR on the rear image 111B, the rear left image 111BL and the rear right image 111BR. However, the image synthesizing unit 132 may generate the synthesized image 111C corresponding to the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR by using another method. One example of another method of generating the synthesized image 111C corresponding to the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR will be described.
The image synthesizing unit 132 may generate the synthesized image 111C corresponding to the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR by controlling the rear camera 11B, the rear left camera 11BL and the rear right camera 11BR. For example, the image synthesizing unit 132 may generate the synthesized image 111C corresponding to the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR by controlling an optical parameter of each of the rear camera 11B, the rear left camera 11BL and the rear right camera 11BR so that the imaging range IRB, the imaging range IRBL and the imaging range IRBR vary. A focal length of an optical system (for example, a lens or the like) of each of the rear camera 11B, the rear left camera 11BL and the rear right camera 11BR is one example of the optical parameter. In this case, the image synthesizing unit 132 may control the rear camera 11B, the rear left camera 11BL and the rear right camera 11BR so that the imaging range IRB of the rear camera 11B is same as an imaging range IRB_N corresponding to the normal image angle θB_N, the imaging range IRBL of the rear left camera 11BL is same as an imaging range IRBL_N corresponding to the normal image angle θBL_N and the imaging range IRBR of the rear right camera 11BR is same as an imaging range IRBR_N corresponding to the normal image angle θBR_N when the rear vehicle 2 does not exist or the inter-vehicular distance L12 is longer than the threshold value TH1, as illustrated in an upper part of
Alternatively, when the vehicle 1 is provided with a plurality of rear cameras 11B having different imaging ranges IRB, the imaging synthesizing unit 132 may generate the synthesized image 111C corresponding to the rear image angle θB by selecting one rear camera 11B that is used to actually capture the rear image 111B from the plurality of rear cameras 11B on the basis of the existence/non-existence of the rear vehicle 2 and the inter-vehicular distance L12. Specifically, the vehicle 1 may be provided with a rear camera 11B_N and a rear camera 11B_L. The imaging range IRB of the rear camera 11B_N is the imaging range IRB_N corresponding to the normal image angle θB_N. The imaging range IRB of the rear camera 11B_L is the imaging range IRB_L corresponding to the large image angle θB_L. In this case, the image synthesizing unit 132 may control the rear camera 11B_N so that the rear camera 11B_N captures the rear image 111B when the rear vehicle 2 does not exist or the inter-vehicular distance L12 is longer than the threshold value TH1, as illustrated in an upper part of
In the above described description, the image synthesizing unit 132 varies the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR on the basis of the existence/non-existence of the rear vehicle 2 and the inter-vehicular distance L12 and also varies the proportion of the area of each of the rear image 112B, the rear left image 112BL and the rear right image 112BR to the synthesized image 111C in response to the variation of the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR. However, the image synthesizing unit 132 may vary the proportion of the area of each of the rear image 112B, the rear left image 112BL and the rear right image 112BR to the synthesized image 111C on the basis of the existence/non-existence of the rear vehicle 2 and the inter-vehicular distance L12 without varying the rear image angle θB, the rear left image angle θBL and the rear right image angle θBR. In this case, as illustrated in
(5) Additional Statement
Relating to the above described embodiment, following additional statements will be disclosed.
(5-1) Additional Statement 1
An image display apparatus according to the additional statement 1 is provided with: a synthesizing device that is configured to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imaging device that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imaging device that is configured to image a rear side area located at the rear and the side of the first vehicle; and a displaying device that is configured to display the synthesized image, the synthesizing device is configured to vary a proportion of each of a rear image area and a rear side image area to the synthesized image on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the rear image area is an area in which the rear image is displayed in the synthesized image and the rear side image rea is an area in which the rear side image is displayed in the synthesized image, when the synthesizing device generates the synthesized image.
Alternatively, an image display apparatus according to the additional statement 1 may be provided with: a controller that is programmed to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imager that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imager that is configured to image a rear side area located at the rear and the side of the first vehicle; and a display that is configured to display the synthesized image, the controller is programmed to vary a proportion of each of a rear image area and a rear side image area to the synthesized image on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the rear image area is an area in which the rear image is displayed in the synthesized image and the rear side image area is an area in which the rear side image is displayed in the synthesized image, when the controller generates the synthesized image.
The image display apparatus according to the additional statement 1 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image when the second vehicle exists at the rear of the first vehicle, compared to an image display apparatus in a comparison example in which the proportion of each of the rear image area and the rear side image area to the synthesized image is fixed regardless of the velocity of the first vehicle and the distance between the first vehicle and the second vehicle.
(5-2) Additional Statement 2
An image display apparatus according to the additional statement 2 is the image display apparatus according to the additional statement 1, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the proportion of the rear image area to the synthesized image so that the proportion of the rear image area to the synthesized image becomes larger as the distance becomes shorter.
If the distance between the first vehicle and the second vehicle is relatively short, there is a possibility that the image part of the synthesized image corresponding to the rear image includes the second vehicle in a state where the visibility of the second vehicle deteriorates. As a result, there is a possibility that the visibility of the second vehicle deteriorates in the synthesized image. In the image display apparatus according to the additional statement 2, the proportion of the rear image area to the synthesized image becomes larger as the distance between the first vehicle and the second vehicle becomes shorter. Namely, the rear image is displayed at a relatively large displaying area in the synthesized image. When the rear image is displayed at the relatively large displaying area, the visibility of the rear image improves. Therefore, the deterioration of the visibility of the second vehicle (especially, the second vehicle in the rear image) in the synthesized image is prevented to some extent. Namely, the image display apparatus according to the additional statement 2 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image.
Note that the synthesizing device may be configured to (alternatively, controller may be programmed to) vary the proportion of the rear side image area to the synthesized image so that the proportion of the rear side image area to the synthesized image becomes smaller as the distance becomes shorter.
(5-3) Additional Statement 3
An image display apparatus according to the additional statement 3 is the image display apparatus according to the additional statement 1 or 2, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the proportion of the rear image area to the synthesized image so that the proportion of the rear image area to the synthesized image when the distance is shorter than a predetermined first threshold value is larger than the proportion of the rear image area to the synthesized image when the distance is longer than the first threshold value.
The image display apparatus according to the additional statement 3 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image, as with the image display apparatus according to the additional statement 2.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the proportion of the rear side image area to the synthesized image so that the proportion of the rear side image area to the synthesized image when the distance is shorter than the first threshold value is smaller than the proportion of the rear side image area to the synthesized image when the distance is longer than the first threshold value.
(5-4) Additional Statement 4
An image display apparatus according to the additional statement 4 is the image display apparatus according to any one of the additional statements 1 to 3, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the proportion of the rear image area to the synthesized image so that the proportion of the rear image area to the synthesized image becomes larger as the velocity becomes lower.
If the velocity of the first vehicle is relatively low, there is a higher possibility that the second vehicle approaches the first vehicle more, and thus, the distance between the first vehicle and the second vehicle becomes shorter relatively easily. Thus, when the velocity of the first vehicle is relatively low, there is a possibility that the image part of the synthesized image corresponding to the rear image includes the second vehicle in a state where the visibility of the second vehicle deteriorates, as with the case where the distance between the first vehicle and the second vehicle is relatively short. In the image display apparatus according to the additional statement 4, the proportion of the rear image area to the synthesized image becomes larger as the velocity of the first vehicle becomes shorter. Thus, the image display apparatus according to the additional statement 4 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image, as with the image display apparatus according to the additional statement 2.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the proportion of the rear side image area to the synthesized image so that the proportion of the rear side image area to the synthesized image becomes smaller as the velocity becomes lower.
(5-5) Additional Statement 5
An image display apparatus according to the additional statement 5 is the image display apparatus according to any one of the additional statements 1 to 4, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the proportion of the rear image area to the synthesized image so that the proportion of the rear image area to the synthesized image when the velocity is lower than a predetermined second threshold value is larger than the proportion of the rear image area to the synthesized image when the velocity is higher than the second threshold value.
The image display apparatus according to the additional statement 5 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image, as with the image display apparatus according to the additional statement 4.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the proportion of the rear side image area to the synthesized image so that the proportion of the rear side image area to the synthesized image when the velocity is lower than the second threshold value is smaller than the proportion of the rear side image area to the synthesized image when the velocity is higher than the second threshold value.
(5-6) Additional Statement 6
An image display apparatus according to the additional statement 6 is the image display apparatus according to any one of the additional statements 1 to 5, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary an image angle of each of a first image part and a second image part on the basis of at least one of the velocity and the distance, wherein the first image part is an image part that is one portion of the synthesized image and that corresponds to the rear image and the second image part is an image part that is one portion of the synthesized image and that corresponds to the rear side image, when the synthesizing device (alternatively, the controller) generates the synthesized image.
The image display apparatus according to the additional statement 6 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image when the second vehicle exists at the rear of the first vehicle, compared to an image display apparatus in a comparison example in which the image angle of each of the first image part and the second image part is fixed regardless of the velocity of the first vehicle and the distance between the first vehicle and the second vehicle.
Note that the “image angle of a certain image part” means an index value that represents, as an angle from a virtual viewpoint, a range of a scene included the certain image part displayed by the displaying device or the display.
(5-7) Additional Statement 7
An image display apparatus according to the additional statement 7 is provided with: a synthesizing device that is configured to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imaging device that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imaging device that is configured to image a rear side area located at the rear and the side of the first vehicle; and a displaying device that is configured to display the synthesized image, the synthesizing device is configured to vary an image angle of each of a first image part and a second image part on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the first image part is an image part that is one portion of the synthesized image and that corresponds to the rear image and the second image part is an image part that is one portion of the synthesized image and that corresponds to the rear side image, when the synthesizing device generates the synthesized image.
Alternatively, an image display apparatus according to the additional statement 7 may be provided with: a controller that is programmed to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imager that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imager that is configured to image a rear side area located at the rear and the side of the first vehicle; and a display that is configured to display the synthesized image, the controller is programmed to vary an image angle of each of a first image part and a second image part on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the first image part is an image part that is one portion of the synthesized image and that corresponds to the rear image and the second image part is an image part that is one portion of the synthesized image and that corresponds to the rear side image, when the controller generates the synthesized image.
The image display apparatus according to the additional statement 7 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image when the second vehicle exists at the rear of the first vehicle, compared to an image display apparatus in a comparison example in which the image angle of each of the first image part and the second image part is fixed regardless of the velocity of the first vehicle and the distance between the first vehicle and the second vehicle.
(5-8) Additional Statement 8
An image display apparatus according to the additional statement 8 is the image display apparatus according to the additional statement 6 or 7, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the image angle of the first image part so that the image angle of the first image part becomes larger as the distance becomes shorter.
As described above, if the distance between the first vehicle and the second vehicle is relatively short, there is a possibility that the visibility of the second vehicle deteriorates in the synthesized image. In the image display apparatus according to the additional statement 8, the image angle of the rear image becomes larger as the distance between the first vehicle and the second vehicle becomes shorter. If the image angle of the rear image becomes larger, the rear image includes the scene spreading in the wider or larger field (namely, a blind area that is not included in the rear image becomes smaller). Thus, the visibility of the rear image improves. Therefore, the deterioration of the visibility of the second vehicle (especially, the second vehicle in the rear image) in the synthesized image is prevented to some extent. Namely, the image display apparatus according to the additional statement 8 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the image angle of the second image part so that the image angle of the second image part becomes smaller as the distance becomes shorter.
(5-9) Additional Statement 9
An image display apparatus according to the additional statement 9 is the image display apparatus according to any one of the additional statements 6 to 8, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the image angle of the first image part so that the image angle of the first image part when the distance is shorter than a predetermined first threshold value is larger than the image angle of the first image part when the distance is longer than the first threshold value.
The image display apparatus according to the additional statement 9 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image, as with the image display apparatus according to the additional statement 8.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the image angle of the second image part so that the image angle of the second image part when the distance is shorter than the first threshold value is smaller than the image angle of the second image part when the distance is longer than the first threshold value.
(5-10) Additional Statement 10
An image display apparatus according to the additional statement 10 is the image display apparatus according to any one of the additional statements 6 to 9, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the image angle of the first image part so that the image angle of the first image part becomes larger as the velocity becomes lower.
As described above, if the velocity of the first vehicle is relatively low, there is a possibility that the visibility of the second vehicle deteriorates in the synthesized image. In the image display apparatus according to the additional statement 10, the image angle of the rear image becomes larger as the velocity of the first vehicle becomes lower. Thus, the image display apparatus according to the additional statement 10 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image, as with the image display apparatus according to the additional statement 8.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the image angle of the second image part so that the image angle of the second image part becomes smaller as the velocity becomes lower.
(5-11) Additional Statement 11
An image display apparatus according to the additional statement 11 is the image display apparatus according to any one of the additional statements 6 to 10, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
The image display apparatus according to the additional statement 11 is capable of synthesizing the rear image and the rear side image while securing the visibility of the second vehicle in the synthesized image, as with the image display apparatus according to the additional statement 10.
Note that the synthesizing device may be configured to (alternatively, the controller may be programmed to) vary the image angle of the second image part so that the image angle of the second image part when the velocity is lower than the second threshold value is smaller than the image angle of the second image part when the velocity is higher than the second threshold value.
(5-12) Additional Statement 12
An image display apparatus according to the additional statement 12 is the image display apparatus according to any one of the additional statements 7 to 11, wherein the synthesizing device is configured to (alternatively, the controller may be programmed to) vary the image angle of each of the first image part and the second image part without varying a proportion of each of a rear image area and a rear side image area to the synthesized image, wherein the rear image area is an area in which the rear image is displayed in the synthesized image and the rear side image area is an area in which the rear side image is displayed in the synthesized image.
(5-13) Additional Statement 13
An image display apparatus according to the additional statement 13 is the image display apparatus according to any one of the additional statements 6 to 12, wherein the synthesizing device is configured to (alternatively, the controller is programmed to) extract a rear image part that is at least one portion of the rear image and a rear side image part that is at least one portion of the rear side image and to generate the synthesized image by synthesizing the rear image part and the rear side image part, the synthesizing device is configured to (alternatively, the controller is programmed to) vary the image angle of each of the first image part and the second image part by varying an area in the rear image from which the rear image part is extracted and an area in the rear side image from which the rear side image part is extracted on the basis of at least one of the distance and the velocity.
(5-14) Additional Statement 14
An image display apparatus according to the additional statement 14 is the image display apparatus according to any one of the additional statements 6 to 13, wherein the synthesizing device is configured to vary the image angle of the first image part and the second image part by controlling the rear imaging device and the rear side imaging device on the basis of at least one of the velocity and the distance so that an imaging range of each of the rear imaging device and the rear side imaging device varies.
Alternatively, an image display apparatus according to the additional statement 14 may be the image display apparatus according to any one of the additional statements 6 to 13, wherein the controller is programmed to vary the image angle of the first image part and the second image part by controlling the rear imager and the rear side imager on the basis of at least one of the velocity and the distance so that an imaging range of each of the rear imager and the rear side imager varies.
(5-15) Additional Statement 15
An image display apparatus according to the additional statement 15 is the image display apparatus according to any one of the additional statements 6 to 14, wherein the vehicle is provided with a plurality of rear imaging devices having different imaging ranges, respectively, the synthesizing device is configured to vary the image angle of the first image part by selecting, as one rear imaging device that should capture the rear image used for generating the synthesized image, one of the plurality of rear imaging devices on the basis of at least one of the velocity and the distance.
Alternatively, an image display apparatus according to the additional statement 15 may be the image display apparatus according to any one of the additional statements 6 to 14, wherein the vehicle is provided with a plurality of rear imagers having different imaging ranges, respectively, the controller is programmed to vary the image angle of the first image part by selecting, as one rear imager that should capture the rear image used for generating the synthesized image, one of the plurality of rear imagers on the basis of at least one of the velocity and the distance.
(5-16) Additional Statement 16
An image display apparatus according to the additional statement 16 is the image display apparatus according to any one of the additional statements 6 to 15, wherein the vehicle is provided with a plurality of rear side imaging devices having different imaging ranges, respectively, the synthesizing device is configured to vary the image angle of the second image part by selecting, as one rear side imaging device that should capture the rear side image used for generating the synthesized image, one of the plurality of rear side imaging devices on the basis of at least one of the velocity and the distance.
Alternatively, an image display apparatus according to the additional statement 16 may be the image display apparatus according to any one of the additional statements 6 to 15, wherein the vehicle is provided with a plurality of rear side imagers having different imaging ranges, respectively, the controller is programmed to vary the image angle of the second image part by selecting, as one rear side imager that should capture the rear side image used for generating the synthesized image, one of the plurality of rear side imagers on the basis of at least one of the velocity and the distance.
At least one portion of the feature in the above described embodiment and the modified example may be eliminated or modified accordingly. At least one feature in the above described embodiment and the modified example may be combined with another one feature in the above described embodiment and the modified example.
This application is based upon and claims the benefit of priority of the prior Japanese Patent Application No. 2017-243705, filed on Dec. 20, 2017, the entire contents of which are incorporated herein by reference. In addition, the entire contents of the above described Patent Literatures 1 to 2 are incorporated herein by reference.
All examples and conditional language recited herein are intended for pedagogical purposes to aid the reader in understanding the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions, nor does the organization of such examples in the specification relate to a showing of the superiority and inferiority of the invention. Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention. An image display apparatus, which involve such changes, are also intended to be within the technical scope of the present invention.
REFERENCE SIGNS LIST
- 1, 2 vehicle
- 11B, 11B_N, 11B_L rear camera
- 11BL, 11BL_N, 11BL_S rear left camera
- 11BR, 11BR_N, 11BR_S rear right camera
- 12 rear vehicle sensor
- 13 ECU
- 131 image collecting unit
- 132 image synthesizing unit
- 14 display
- 111B, 112B rear image
- 111BL, 112BL rear left image
- 111BR, 112BR rear right image
- 111C synthesized image
- IRB, IRBL, IRBR imaging range
- θB, θBh, θBv rear image angle
- θBL rear left image angle
- θBR rear right image angle
- θB_N, θBL_N, θBR_N normal image angle
- θB_L large image angle
- θBL_S, θBR_S small image angle
Claims
1. An image display apparatus comprising:
- a controller that is programmed to synthesize a rear image and a rear side image to generate a synthesized image, wherein the rear image is captured by a rear imaging device that is configured to image a rear area located at the rear of a first vehicle and the rear side image is captured by a rear side imaging device that is configured to image a rear side area located at the rear and the side of the first vehicle; and
- a display that is configured to display the synthesized image,
- the controller being programmed to vary an image angle of each of a first image part and a second image part on the basis of at least one of a velocity of the first vehicle and a distance between the first vehicle and a second vehicle that exists at the rear of the first vehicle, wherein the first image part is an image part that is one portion of the synthesized image and that corresponds to the rear image and the second image part is an image part that is one portion of the synthesized image and that corresponds to the rear side image, when the synthesizing device generates the synthesized image.
2. The image display apparatus according to claim 1, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part becomes larger as the distance becomes shorter.
3. The image display apparatus according to claim 1, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the distance is shorter than a predetermined first threshold value is larger than the image angle of the first image part when the distance is longer than the first threshold value.
4. The image display apparatus according to claim 1, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part becomes larger as the velocity becomes lower.
5. The image display apparatus according to claim 1, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
6. The image display apparatus according to claim 2, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the distance is shorter than a predetermined first threshold value is larger than the image angle of the first image part when the distance is longer than the first threshold value.
7. The image display apparatus according to claim 2, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part becomes larger as the velocity becomes lower.
8. The image display apparatus according to claim 3, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part becomes larger as the velocity becomes lower.
9. The image display apparatus according to claim 6, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part becomes larger as the velocity becomes lower.
10. The image display apparatus according to claim 2, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
11. The image display apparatus according to claim 3, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
12. The image display apparatus according to claim 4, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
13. The image display apparatus according to claim 6, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
14. The image display apparatus according to claim 7, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
15. The image display apparatus according to claim 9, wherein the controller is programmed to vary the image angle of the first image part so that the image angle of the first image part when the velocity is lower than a predetermined second threshold value is larger than the image angle of the first image part when the velocity is higher than the second threshold value.
Type: Application
Filed: Feb 11, 2022
Publication Date: May 26, 2022
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA (Toyota-shi)
Inventors: Yuka SHIDOCHI (Toyota-shi), Goro Asai (Toyota-shi), Kunihiro Sugihara (Nagakute-shi)
Application Number: 17/669,542