JP6607128B2 - Virtual image display device, virtual image display method, and control program - Google Patents

Description

The present invention relates to a virtual image display device for vehicles, a virtual image display method, and a control program.
About.

  In recent years, a head-up display (hereinafter referred to as HUD) is known as a virtual image display device for a vehicle that displays information related to vehicle operation such as navigation information and traveling speed on a windshield of the vehicle. Patent Document 1 discloses a HUD that captures an image of a scene (outside scene) in front of the vehicle and sets the display color of the virtual image based on the color of the preceding vehicle existing in the vicinity of the virtual image display portion in the image. Is described. Patent Document 2 describes a HUD that determines the display color of a virtual image in consideration of the contrast ratio between the outside scene and the virtual image to be displayed.

JP 2009-274542 A JP2015-134521A

  Since the virtual image by the HUD enters the driver's field of view while driving the vehicle, the virtual image is required to be clearly displayed and simple so that the driver can appropriately recognize it. However, as in the technique related to HUD described in Patent Documents 1 and 2, when the display color of the virtual image by HUD is changed based on the color tone of the outside scene and the contrast ratio between the outside scene and the virtual image, the situation where the outside scene changes rapidly. The display color of the virtual image changes frequently, which is troublesome.

  The present invention has been made in view of the above problems, and the present invention does not frequently change the display color of the virtual image and complicate the display contents of the virtual image even when the situation of the outside scene changes. An object of the present invention is to provide a virtual image display device that can appropriately recognize a virtual image.

  In order to solve the above-described problems, a virtual image display device according to the present invention projects a display data generation unit that generates display data to be displayed as a virtual image, and image light based on the display data as a virtual image in front of the driver of the vehicle. Specified in the range specifying unit, the range specifying unit for specifying the range where the virtual image is superimposed on the video data, and the range specifying unit Display for the video data in the range when the determination unit determines the degree of complexity of the image and the determination unit determines that the degree of complexity of the image is relatively higher than the reference complexity level. A display data changing unit that maintains a display color of the display object included in the data and adds a line along the shape of the display object in a color different from the display color of the display object. And wherein the Rukoto.

  In order to solve the above-described problems, a virtual image display method according to the present invention includes a virtual image display device including a video light projection unit that projects video light based on display data to be displayed as a virtual image as a virtual image in front of the driver of the vehicle. The virtual image display method used includes a step of generating display data, a step of acquiring video data obtained by photographing a scene in front of the vehicle, and a range of video data in which a virtual image specified in the video data is superimposed Determining the degree of complexity of the video, and maintaining the display color of the display object included in the display data when the degree of complexity of the video is determined to be relatively higher than the standard complexity level. And adding a line along the shape of the display object with a color different from the display color of the display object.

  In order to solve the above-described problem, a control program according to the present invention controls a virtual image display device including a video light projection unit that projects video light based on display data to be displayed as a virtual image as a virtual image in front of the driver of the vehicle. A processing program for generating display data, a processing procedure for acquiring video data obtained by capturing a scene in front of the vehicle, and a video in a range in which a virtual image specified in the video data is superimposed The processing procedure for determining the degree of complexity of the image for the data and the display object included in the display data when the degree of complexity of the image is determined to be relatively higher than the reference complexity A processing procedure for maintaining the display color and adding a line along the shape of the display object in a color different from the display color of the display object. It is those of.

  The present invention

  According to the present invention, it is possible to appropriately recognize a virtual image without changing the display color of the virtual image frequently and without complicating the display content of the virtual image even when the situation of the outside scene changes.

It is a figure which shows typically schematic structure of the virtual image display apparatus concerning this Embodiment. It is a figure which shows an example of the image light projected on the windshield visually recognized by the driver | operator of a vehicle in the virtual image display apparatus concerning this Embodiment. It is a block diagram which shows schematic structure of the virtual image display apparatus concerning this Embodiment. It is a figure which shows the example of the range where a virtual image is superimposed in the video data of the scenery ahead of the vehicle which the video data acquisition part acquired. It is a histogram which shows the example of the color tone distribution in video data. It is a histogram which shows the other example of the color tone distribution in video data. It is a histogram which shows the further another example of the color tone distribution in video data. It is a histogram which shows the example of the luminance distribution in video data. It is a histogram which shows the other example of the luminance distribution in video data. It is a histogram which shows the further another example of the luminance distribution in video data. It is a figure which shows the group which consists of a some adjacent pixel in the video data of the specified range. It is a figure which shows the example of the display object (The display object which does not add the line along the shape of a display object with the color different from the display color of a display object) contained in the display data of the virtual image to display in normal time. 6 is a diagram illustrating a display example of a display object according to the first embodiment. FIG. FIG. 10 is a diagram illustrating a display example of a display object according to the second embodiment. FIG. 10 is a diagram illustrating a display example of a display object according to the third embodiment. FIG. 10 is a diagram illustrating a display example of a display object according to a fourth embodiment. FIG. 10 is a diagram illustrating a display example of a display object according to a fifth embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
A virtual image display device for a vehicle according to an embodiment of the present invention is a head-up display device. First, a schematic configuration of the virtual image display device 100 will be described.
FIG. 1 is a side view schematically showing a configuration of a virtual image display device 100 according to the present embodiment. As shown in FIG. 1, the virtual image display device 100 includes a control unit 110, an image light projection unit 120, a reflection unit 140, a combiner 160, and a housing 170.

  The image light projection unit 120 includes a projector that projects the image light L1 in front of the driver of the vehicle. The image light projection unit 120 emits image light L1 corresponding to the projection image toward the reflection unit 140, and in the example of FIG. A reflection unit 140 is disposed in the obliquely upward direction behind the image light projection unit 120. Therefore, the image light L1 from the image light projection unit 120 enters the reflection unit 140. The video light projection unit 120 projects the video light L1 according to the display signal.

  The reflection unit 140 reflects the image light L1 from the image light projection unit 120. The reflection unit 140 includes a concave mirror and the like, and expands the image light L1. The reflection unit 140 reflects the image light L1 in the direction of the virtual image projection plane such as the combiner 160. In the example of FIG. 1, it reflects toward the diagonally upward front direction. A combiner 160 is arranged in the diagonally upward direction of the reflection unit 140. Therefore, the image light L <b> 1 reflected by the reflecting unit 140 enters the combiner 160. The reflection unit 140 may be provided with an optical path changing unit such as a servo motor or a gear that changes the reflection optical path of the image light L1 by driving the reflection unit 140.

The combiner 160 reflects a part of the incident video light L1 to display a virtual image. Therefore, the image light L1 reflected by the combiner 160 enters the observer's eyes. As shown in FIG. 2, when the virtual image display device 100 is installed on the dashboard 13 of the automobile 1, the external light L <b> 2 from the outside that has passed through the windshield 12 and the video light L <b> 1 from the virtual image display device 100. Are superimposed (superimposed), and the scenery in front of the vehicle (outside scene) and the virtual image generated by the virtual image display device 100 can be simultaneously seen in the field of view of the driver P.
The virtual image display device to which the present invention is applied is a virtual image display device that uses a windshield of a vehicle as a virtual image projection plane without using a combiner, in addition to the virtual image display device 100 using a combiner 160 as shown in FIG. Also good.

  In the following description, a description will be given based on a direction in a state where the virtual image display device 100 is placed on the dashboard 13 of the automobile 1. That is, the direction of the automobile 1 is set as a reference direction. For example, the front glass 12 side will be described as the front, and the driver P side will be described as the rear. Similarly, the description will be made with the roof side of the automobile 1 as the upper side, the ground side as the lower side, and the lateral direction (left-right direction) of the automobile 1 as the side.

Next, the control configuration of the virtual image display device 100 will be described.
FIG. 3 is a block diagram showing a control configuration of the virtual image display device 100. As shown in FIG. 3, the control unit 110 includes a display data generation unit 4, a video data acquisition unit 5, a range specification unit 6, a determination unit 7, a display data change unit 8, a projection control unit 9, It has. The control unit 110 is a computer including a CPU, a ROM, a RAM, and the like.

  The display data generation unit 4 generates display data to be displayed as a virtual image based on display information from the display information supply means 10 such as a CAN (Controller Area Network) or a navigation system. The video data acquisition unit 5 acquires video data obtained by capturing a scene in front of the vehicle with the front camera 11 as an imaging unit. The front camera 11 is arranged at an arbitrary position where a scene in front of the vehicle seen from the driver can be taken. For example, as shown in FIG. 2, the front camera 11 is installed at a position where the front of the vehicle can be photographed, such as the back side of the rear mirror 14 near the top of the windshield 12 of the host vehicle. Note that the front camera 11 may be integrally disposed on the virtual image display device 100.

  The range specifying unit 6 specifies a range in which a virtual image is superimposed in the video data acquired by the video data acquiring unit 5. The determination unit 7 determines the degree of video complexity for the video data in the range specified by the range specifying unit 6. A specific determination method will be described later. The display data changing unit 8 maintains the display color of the display object included in the display data when the determining unit 7 determines that the degree of complexity of the video is relatively higher than the reference degree of complexity. A line along the shape of the display object is added in a color different from the display color of the display object.

  The image light projection unit 120 includes a light source 121 that generates light, a projection image display unit 122 such as a light modulation element that modulates light generated by the light source according to display data, and an optical unit 123 such as a projection lens that projects light. have. For example, a liquid crystal panel that is a light modulation element modulates light from a backlight light source. Alternatively, a scanning mirror such as a MEMS (Micro Electronics Mechanical System) mirror can be used as the light modulation element. In this case, the scanning mirror scans light from a light source such as a laser diode or an LED (Light Emitting Diode) according to a display signal. The projection control unit 9 controls the light source 121 and the projection image display unit 122 of the video light projection unit 120.

  Each process in the control unit 110 can be realized by causing a computer or the like to execute a program. More specifically, in the control unit 110, the program stored in the program memory is loaded into the main storage device, and the program is executed under the control of the CPU. The control unit 110 is not limited to being realized by software by a program, and may be realized by any combination of hardware, firmware, and software.

  Each function realized in the control unit 110 may be a control unit in a single device as the virtual image display device 100, or may use a control unit in another device linked to the virtual image display device 100. For example, when the virtual image display device 100 merely displays the received video data, the projection control unit 9 in the control unit 110 is realized by the control unit of the virtual image display device 100, and other functions are This is realized by a camera or another device that controls a display image. In such a case, the virtual image display device can be rephrased as a virtual image display system.

  As described above, the virtual image generated by the virtual image display device 100 is superimposed on the scenery in front of the vehicle seen from the driver. FIG. 4 is a diagram illustrating an example of a range in which a virtual image is superimposed in the video data of the scenery in front of the vehicle acquired by the video data acquisition unit 5 (see FIG. 3). As shown in FIG. 4, ranges (virtual image superimposing ranges A, B, and C) surrounded by broken lines are ranges in which virtual images are superimposed on video data.

  Since the position of the driver's eyes changes depending on the driver's sitting height, driving posture, and the like, the virtual image display device 100 may be configured to change the range in which the virtual image is superimposed in the scenery in front of the vehicle seen from the driver. In such a case, the range in which the virtual image is actually superimposed in the video data is also changed in accordance with the change in the range in which the virtual image in the scenery in front of the vehicle seen from the driver is superimposed. The range specifying unit 6 may match the range in which the virtual image is superimposed in the video data specified by the range specifying unit 6 with the setting of the range in which the virtual image is superimposed in the scenery in front of the vehicle seen from the driver. That is, the range in which the virtual image is superimposed on the video data specified by the range specifying unit 6 is matched with the range in which the virtual image is actually superimposed on the video data. The virtual image superimposing ranges A and B shown in FIG. 4 are examples of ranges in which virtual images in video data are superimposed when matching the setting of the range in which the virtual image is superimposed in the scenery in front of the vehicle seen from the driver. is there. In this way, the display data changing unit 8 (see FIG. 3) can more appropriately determine the timing for adding a line along the shape of the display object.

  On the other hand, in the range specifying unit 6 (see FIG. 3), a range in which the virtual image in the video data is superimposed, which can cover any of the setting ranges for the specific driver such as the virtual image superimposing ranges A and B, is set in advance. It may be. A virtual image superimposing range C shown in FIG. 4 is an example of a range in which a virtual image in video data is superposed, which can cover any setting range for a specific driver. When the range in which the virtual image is superimposed in the video data specified by the range specifying unit 6 is set as the virtual image superimposing range C, no matter how the range in which the virtual image is superimposed in the scenery in front of the vehicle seen from the driver is set. The virtual image can be contained within the range of the virtual image superimposing range C. In this way, it is not necessary to change the range in which the virtual image is actually superimposed in the video data in accordance with the change in the range in which the virtual image in the scenery in front of the vehicle seen from the driver is superimposed.

Here, a description will be given of a method in which the determination unit 7 (see FIG. 3) determines the degree of complexity of the video with respect to the video data in the range specified by the range specifying unit 6 (see FIG. 3).
The determination unit 7 determines the degree of complexity of the video data within the specified range based on the statistical distribution (histogram) of the color tone or luminance of the video data within the range specified by the range specifying unit 6. To do.

  5 to 7 are histograms showing examples of the color tone distribution in the video data. This histogram is a graph in which the horizontal axis indicates the wavelength of light (the wavelength increases as it goes to the right), and the vertical axis indicates the number of pixels for each wavelength. In other words, in the video data, as the color component having a lower wavelength increases, it is stacked on the left side of the graph, and as the color component having a higher wavelength increases, it is displayed on the right side of the graph.

  In the histogram shown in FIG. 5, there is one large peak of the color wavelength (the peak is concentrated in the vicinity of the wavelength of the certain color). A case where there is one large wavelength wavelength peak as in the example shown in FIG. When the histogram of the color tone distribution of the video data in the range specified by the range specifying unit 6 (see FIG. 3) is as shown in FIG. 5, the display object in the display data displayed as a virtual image conforms to the shape of the display object. Do not add a line.

  The histogram shown in FIG. 5 shows a state in which the color constituting the video data within the range specified by the range specifying unit 6 has a large proportion of single colors or similar colors. When the background corresponding to such video data is used as a background, there is no difficulty in recognizing a virtual image. If the color near the peak of the histogram shown in FIG. 5 and the color of the virtual image display object are close to each other, the virtual image can be appropriately recognized by changing the color of the virtual image display object.

  As a specific example, the image data within the range specified by the range specifying unit 6 is used as an example as shown in FIG. 5, for example, a background composed of orange and near-orange colors having a wavelength of around 600 nm, such as a large vehicle. When the rear surface is photographed, there is no difficulty in recognizing the virtual image if the color of the display object of the virtual image is other than orange or a color close to orange.

  In the histogram shown in FIG. 6, there are two large peaks of the color wavelength. When there are two or more peaks having a large color wavelength as in the example shown in FIG. 6, it is determined that the degree of complexity is relatively higher than the reference degree of complexity. In such a case, a line along the shape of the display object is added to the display object in the display data displayed as a virtual image.

  The histogram shown in FIG. 6 shows a state in which the color constituting the video data within the range specified by the range specifying unit 6 has a high ratio of a plurality of colors or similar colors of a plurality of colors. When the background corresponding to such video data is used as the background, the color of the virtual image display object is likely to be the same as or close to the peak color of the histogram shown in FIG. . The example shown in FIG. 6 has two peaks, but this is particularly remarkable when the number of peaks is larger. In such a case, the visibility of a part or the whole of the virtual image display object deteriorates.

  As a specific example, the video data within the range specified by the range specifying unit 6 includes, as an example as shown in FIG. 6, green and a color in the vicinity of green having a wavelength of around 550 nm, and a red and red in the vicinity of wavelength of 750 nm. This is the case of a background composed of colors. In such a case, the possibility that the color of the entire virtual image display object is different from the background color is low. For example, when the outside scene corresponding to the range specified by the range specifying unit 6 includes a green or green forest and a red vehicle centered on a color near green and green, or the green and red on the rear surface of the large vehicle This is the case where the coloring constituted by is applied.

  In the histogram shown in FIG. 7, there is no large peak at a specific color wavelength, and the color wavelength is distributed over a wide range. When the color wavelength is distributed over a wide range as in the example shown in FIG. 7, it is determined that the degree of complexity is relatively higher than the reference degree of complexity. In such a case, a line along the shape of the display object is added to the display object in the display data displayed as a virtual image.

  The histogram shown in FIG. 7 shows a state in which the colors constituting the video data within the range specified by the range specifying unit 6 are composed of many colors. When the background corresponding to such video data is used as the background, even if the color of the display object of the virtual image is composed of a single color or a plurality of colors, it is the same as the color in the histogram range shown in FIG. Close color. The histogram shown in FIG. 7 is similar to the histogram shown in FIG. 6 in which a plurality of peaks exist.

  As a specific example, there are many colors in video data within the range specified by the range specifying unit 6 from blue-green having a wavelength of about 480 nm to red having a wavelength of about 750 nm as shown in FIG. It is a case. For example, when the outside scene corresponding to the range specified by the range specifying unit 6 includes objects or vehicles of various colors, the rear surface of the large vehicle is colored with many colors. Such as the case.

  8 to 10 are histograms showing examples of the luminance distribution in the video data. This histogram is a graph in which the horizontal axis represents luminance (the luminance increases toward the right) and the vertical axis represents the number of pixels for each luminance. In other words, in the video data, the darker component is stacked on the left side of the graph, and the brighter component is displayed on the right side of the graph.

  In the histogram shown in FIG. 8, there is one peak having a large luminance (the peak is concentrated in the vicinity of a certain luminance). A case where there is one peak having a large luminance as in the example shown in FIG. When the histogram of the luminance distribution of the video data in the range specified by the range specifying unit 6 (see FIG. 3) is as shown in FIG. 8, the display object in the display data displayed as a virtual image conforms to the shape of the display object. Do not add a line.

  The histogram shown in FIG. 8 indicates that the luminance of the pixels constituting the video data within the range specified by the range specifying unit 6 is uniform throughout. When the background corresponding to such video data is used as a background, there is no difficulty in recognizing a virtual image.

  As a specific example, when the luminance of one pixel constituting the video data within the range specified by the range specifying unit 6 is represented by 8 bits (brightness value: 0 to 255), as shown in FIG. When the luminance values are concentrated in a narrow range such as around 100 to 150 regardless of the constituent colors, there is no difficulty in recognizing a virtual image.

  In the histogram shown in FIG. 9, there are two peaks with large luminance. When there are two or more peaks with large luminance as in the example shown in FIG. 9, it is determined that the degree of complexity is relatively higher than the reference degree of complexity. In such a case, a line along the shape of the display object is added to the display object in the display data displayed as a virtual image.

  The histogram shown in FIG. 9 indicates that the luminance of the pixels constituting the video data within the range specified by the range specifying unit 6 has a distribution centered on a plurality of luminance values. When an outside scene corresponding to such video data is used as a background, the visibility of a virtual image is deteriorated due to a difference in luminance values with respect to a plurality of peaks.

  As a specific example, when the luminance of one pixel constituting the video data within the range specified by the range specifying unit 6 is represented by 8 bits (brightness value: 0 to 255), as shown in FIG. Regardless of the constituent color, there is a peak with a luminance value around 100 and a peak with a luminance value around 200. For example, the outside scene corresponding to the range specified by the range specifying unit 6 is a forest with sunlight, a road and a car, the rear surface of a large vehicle having a plurality of high-contrast color schemes, and the like.

  In the histogram shown in FIG. 10, there is no large peak at a specific luminance, and the luminance is distributed over a wide range. When the luminance is distributed over a wide range as in the example illustrated in FIG. 10, it is determined that the degree of complexity is relatively higher than the reference degree of complexity. In such a case, a line along the shape of the display object is added to the display object in the display data displayed as a virtual image.

  The histogram shown in FIG. 10 indicates that a distribution in which various luminance values are included in the pixels constituting the video data within the range specified by the range specifying unit 6 is shown. When the background corresponding to such video data is used as the background, the visibility of the virtual image deteriorates due to various luminance differences.

  As a specific example, when the luminance of one pixel constituting the video data within the range specified by the range specifying unit 6 is represented by 8 bits (brightness value: 0 to 255), as shown in FIG. This is a case where the luminance values are distributed almost uniformly from 80 to 220 regardless of the constituent colors. For example, the outside scene corresponding to the range specified by the range specifying unit 6 is a distant view where various objects exist in the range, the rear surface of a large vehicle drawn with a complicated configuration, and the like.

  In the determination of the degree of complexity of the video in the determination unit 7 (see FIG. 3), for each group of a plurality of adjacent pixels shown in FIG. 11 in the video data in the range specified by the range specifying unit 6 (see FIG. 3). You may make it.

  Next, when the determination unit 7 (see FIG. 3) determines that the complexity level of the video is relatively higher than the standard complexity level, the display data changing unit 8 displays the display color of the display object. An example of a display object in which a line along the shape of the display object is added in a color different from the above will be described below. FIG. 12 shows an example of a display object (a display object that does not add a line along the shape of the display object in a color different from the display color of the display object) included in the virtual image display data to be displayed in a normal state.

[Example 1]
FIG. 13 is a diagram illustrating a display example of the display object according to the first embodiment. As illustrated in FIG. 13, in the first embodiment, the display object illustrated in FIG. 12 is provided with an outline line that is different from the display color of the display object in the display object and that is in the shape of the display object. Append. The color of the outline along the shape of the display object is a color different from the display color of the display object, for example, a complementary color, a color whose wavelength is 150 nm or more away, or a color with different luminance.

[Example 2]
FIG. 14 is a diagram illustrating a display example of a display object according to the second embodiment. As shown in FIG. 14, in the second embodiment, the display object shown in FIG. 12 has a center line along the shape of the display object in a color different from the display color of the display object. Append. The color of the center line along the shape of the display object is a color different from the display color of the display object, for example, a complementary color, a color whose wavelength is 150 nm or more, or a color having a different luminance.

[Example 3]
FIG. 15 is a diagram illustrating a display example of a display object according to the third embodiment. As shown in FIG. 15, in the third embodiment, the display size of the display object included in the display data is increased with respect to the display object shown in FIG.

[Example 4]
FIG. 16 is a diagram illustrating a display example of the display object according to the fourth embodiment. As shown in FIG. 16, in the fourth embodiment, the display object is the same as in the first embodiment, and the background of the display object (the portion other than the display object in the display data) is changed from transparent to colored. The display object may be the same as in the second or third embodiment, and the background of the display object may be changed from transparent to colored. The background color of the display object is a color different from the display color of the display object, such as a complementary color, a color having a wavelength of 150 nm or more, or a color having a different luminance.

[Example 5]
FIG. 17 is a diagram illustrating a display example of a display object according to the fifth embodiment. As shown in FIG. 17, in the fifth embodiment, the display object is the same as in the first embodiment, and the background around the display object is changed from transparent to colored. The display object may be the same as that in the second or third embodiment, and the background around the display object may be changed from transparent to colored. The background color around the display object is a color different from the display color of the display object, for example, a complementary color, a color having a wavelength of 150 nm or more, a color having a different luminance, or the like.

  As described above, according to the present invention, it is possible to appropriately recognize a virtual image without frequently changing the display color of the virtual image and complicating the display content of the virtual image even when the situation of the outside scene changes.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. In the above-described embodiment, the degree of complexity of the video is defined using color or luminance. However, it is also possible to use or combine other parameters even with these combinations.

DESCRIPTION OF SYMBOLS 1 Car 4 Display data generation part 5 Image | video data acquisition part 6 Range specification part 7 Judgment part 8 Display data change part 9 Projection control part 10 Display information supply means 11 Front camera 12 Windshield 13 Dashboard 14 Room mirror 100 Virtual image display apparatus 110 Control unit 120 Image light projection unit 140 Reflection unit 160 Combiner 170 Case P Driver

Claims (8)

A display data generation unit that generates display data to be displayed as a virtual image;
Video light projection unit that projects video light based on the display data as a virtual image ahead of the driver of the vehicle;
A video data acquisition unit that acquires video data of a scene in front of the vehicle;
A range specifying unit for specifying a range in which the virtual image is superimposed in the video data;
A determination unit that determines a degree of complexity of the video for the video data in the range specified by the range specifying unit;
When the determination unit determines that the complexity level of the video is relatively high with respect to a reference complexity level, the display color of the display object included in the display data is maintained, and the display object A display data changing unit for adding a line along the shape of the display object in a color different from the display color;
A virtual image display device comprising: When the determination unit determines that the degree of complexity of the video is relatively higher than a reference degree of complexity, the display data changing unit adds the display object to the display object included in the display data. Adding an outline along the shape of the display object in a color different from the display color of
The virtual image display device according to claim 1. When the determination unit determines that the degree of complexity of the video is relatively higher than a reference degree of complexity, the display data changing unit adds the display object to the display object included in the display data. Adding a center line along the shape of the display object in a color different from the display color of
The virtual image display device according to claim 1. The display data changing unit determines a display size of a display object included in the display data when the determination unit determines that the complexity level of the video is relatively higher than a reference complexity level. Enlarge,
The virtual image display device according to claim 2. The determination unit determines a degree of complexity of a video for each group of a plurality of adjacent pixels in the specified range of video data;
The virtual image display apparatus of any one of Claims 1-4. The determination unit determines the degree of complexity of the video based on a statistical distribution of at least one of color and luminance constituting the specified range of video data;
The virtual image display apparatus of any one of Claims 1-4. A virtual image display method using a virtual image display device including a video light projection unit that projects video light based on display data to be displayed as a virtual image as a virtual image in front of the driver of the vehicle,
Generating the display data;
Obtaining video data of a scene in front of the vehicle;
Determining the degree of complexity of video for video data in a range where the virtual image specified in the video data is superimposed;
When it is determined that the degree of complexity of the video is relatively higher than a reference degree of complexity, the display color of the display object included in the display data is maintained and is different from the display color of the display object Adding a line along the shape of the display object in color;
A virtual image display method comprising: A control program for controlling a virtual image display device including a video light projection unit that projects video light based on display data to be displayed as a virtual image as a virtual image in front of the driver of the vehicle,
On the computer,
A processing procedure for generating the display data;
A processing procedure for acquiring video data of a scene in front of the vehicle;
A processing procedure for determining a degree of complexity of video for video data in a range in which the virtual image specified in the video data is superimposed;
When it is determined that the degree of complexity of the video is relatively higher than a reference degree of complexity, the display color of the display object included in the display data is maintained and is different from the display color of the display object A processing procedure for adding a line along the shape of the display object in color;
A control program to execute.

Images