JP2019157552A - Display device, display method, and display program - Google Patents

Abstract

To provide a technique capable of performing display with excellent visibility from a distance.SOLUTION: A display device includes an image formation part which forms, on a road structure, an illusion image being an image that a passerby visually recognizes through an optical illusion when a protruding object protrudes toward the path of the passerby.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a display device, a display method, and a display program.

  A display method for projecting an image on a paved road surface by a projector device has been proposed (see Patent Document 1). According to Patent Document 1, since an image is projected on a paved road surface on which a pedestrian passes, the pedestrian's attention can be drawn.

JP 2012-207998 A

However, in Patent Document 1, there is a problem that it is difficult to interpret the image on the paved road surface unless the pedestrian looks down on the image on the paved road surface from almost right above the image. That is, when the image on the paved road surface is viewed from a distant position, the characters appear to be flat (the height of the characters is low), which makes it difficult to read the image on the paved road surface.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of performing display with excellent visibility from a distance.

  In order to achieve the above object, the display device of the present invention forms an illusion image on the road structure, which is an image that the passerby visually recognizes by the optical illusion when the protruding object protrudes toward the pass orbit of the passerby. Configured to include an image forming unit.

  In order to achieve the above object, the display method of the present invention forms an illusion image on a road structure, which is an image that a passerby visually recognizes through an optical illusion when a projecting object protrudes toward the pass orbit of the passerby. Configured to do.

  In order to achieve the above object, a display program according to the present invention displays an illusion image, which is an image that a passerby visually recognizes by an optical illusion when a projecting object projects toward a passer's passing trajectory. It is configured to function as an image forming unit formed on top.

  In the configuration of the present invention described above, an illusion image is formed on a road structure, so that a passerby visually recognizes an illusion when a projecting object projects toward a passing track. Since the passerby visually recognizes the projecting object that projects toward the trajectory, it is possible to perform display with excellent visibility from a distance. In addition, it is possible to attract the attention of the passerby from a distance by the protruding object protruding toward the passing track.

  Here, the passer-by may be any person who passes on the road, and any means for moving the passer-by on the road may be used. The road structure may be a structure that is present in the vicinity of the road to the extent that the road and the passers-by can be seen, and that does not hinder the passers-by. For example, the road structure may be a tunnel (side surface, ceiling surface, etc.), a median strip, a sound insulation wall, a guard rail, or the like, or a road surface such as a roadway or a sidewalk. Further, the road structure may be a side wall or a ceiling board for illusion image projection newly provided along the road, or a building or the like existing around the road. Furthermore, the illusion image may be formed on a plane of the road structure, or may be formed on a surface having a shape other than the plane.

  The image forming unit may form an illusion image on the road structure, and the method for forming the illusion image is not particularly limited. For example, an illusion image may be displayed on a display provided in the road structure, or an illusion image may be projected on the road structure. The display may be a liquid crystal display or a laser display. An illusion image may be formed by controlling lighting of light sources such as LEDs and ELs arranged in a matrix on a road structure. The illusion image may be a color image, a monochrome image, or a grayscale image.

  The protruding object may be any object that protrudes from the road structure toward the passer's passage, and the tip of the protruding object may or may not reach the passer's passage. In addition, a passer's passing track is a passer's own track, and may be a track of a vehicle used by the passer. When the tip of the projecting object reaches the passing track of the passerby, an impression that the passing of the passing track is hindered can be given, and the passing of the passing track can be suppressed. However, the present invention is not limited to the one that gives an impression that the passage of the protruding object is obstructed, and may be one that guides the passerby in the direction of the protruding object. Moreover, the character for conveying various information to a passerby may be attached to the protruding object. Since the character is attached to the protruding object that protrudes toward the passage, the legibility of the character is improved. However, a character may not necessarily be attached to the protruding object.

  Here, the illusion image may constitute a moving image. The moving image may be composed of at least one still image illusion image (frame), and the frame rate is not particularly limited. Specifically, the illusion image may constitute a moving image that a passer-by sees as if a protruding object is moving. Thereby, attention to the protruding object can be attracted from a distance, and the protruding object can be reliably recognized. Since the illusion image is generated according to the position of the viewpoint for visually recognizing the illusion image, it can be viewed as if the shape of the protruding object is distorted when the viewpoint of the passerby moves. However, the distortion of the shape of the protruding object can be made inconspicuous by moving the protruding object. Note that the protruding object may move linearly, rotate, or swing in the reciprocating direction. Further, the protruding object may move in the protruding direction or may move in a direction orthogonal to the protruding direction.

  Furthermore, the illusion image may constitute a moving image that changes according to the movement of the viewpoint of the passer-by so that the passer-by can visually recognize that the protruding object has a fixed shape. In other words, the illusion image may be dynamically changed so that even if the viewpoint of the passerby moves, the projected object does not appear to be distorted. For example, the position of the passer's viewpoint may be detected or estimated, and the illusion image may be dynamically changed based on the position of the viewpoint.

  Further, the illusion image may not be an image in which only the protruding object is visually recognized, but may be an image that a passerby visually recognizes that the non-projecting object is present on the road structure together with the protruding object. Since the projecting object is visually recognized together with the non-projecting object, a visual effect such that the projecting object projects by contrasting with the non-projecting object can be emphasized. The non-projecting object may be an object having a lower height that protrudes toward the pass orbit of the passer than the non-projecting object, and may be, for example, a planar object existing along the surface of the road structure. .

  The optical illusion image may be an image that is viewed when a part of the non-projecting object is shielded by the projecting object. Thus, by shielding a part of the non-projecting object with the projecting object, it is possible to give a strong impression that the projecting object is projecting. That is, since the protruding object protrudes, it is possible to give a strong impression that a blind spot is formed in a part of the non-projecting object.

  Furthermore, the illusion image may be an image that a passerby visually recognizes as a character having a border on a protruding object. Thereby, a character can be represented by two or more colors, and the legibility of the character can be ensured without being influenced by the situation of the ambient light irradiated to the road structure.

It is a perspective view which shows the installation state of a display apparatus. It is a block diagram of a display apparatus and an illusion image generation apparatus. FIG. 3A and FIG. 3B are views showing a forward scenery of a passerby. It is explanatory drawing of an illusion image. It is explanatory drawing of an illusion image. 6A and 6B are diagrams showing illusion images. It is a flowchart of a display process. It is the photograph of the road surface where the illusion image was projected.

Here, embodiments of the present invention will be described in the following order.
(1) Configuration of display device:
(2) Configuration of the illusion image generation device:
(3) Display processing:
(4) Other embodiments:

(1) Configuration of display device:
FIG. 1 is a perspective view showing an installation state of a display device 10 according to an embodiment of the present invention. The display device 10 is installed on the top of the support portion 11. The support portion 11 is installed on the shoulder of the road R and has a certain height with respect to the road surface of the road R. The display device 10 is a liquid crystal projector and projects an illusion image I on the road surface of the road R. The road R is a one-way straight road. On the road R, when the vehicle travels in the reverse running direction U indicated by the broken-line arrow, the vehicle will run backward.

  The passerby on the road R is a vehicle occupant (mainly a driver). The road surface of the road R is assumed to be a horizontal plane. The support unit 11 may hold the display device 10 so that the illusion image I can be projected with a depression angle of a certain angle or more with respect to the road surface of the road R, and the shape of the support unit 11 is not particularly limited. For example, the display device 10 may be held on a building or various wall surfaces. The display device 10 may be provided at a position that does not hinder the passage of the vehicle, or may be provided directly above the road R or the like.

  FIG. 2 is a block diagram of the display device 10 and the illusion image generation device 20. The illusion image generation apparatus 20 is a computer that generates illusion video data as data for displaying the illusion image I. The optical illusion moving image data is moving image data for displaying a plurality of optical illusion images I in time series, and the data format is not particularly limited. The illusion image I corresponds to one frame of the moving image indicated by the illusion moving image data.

  In this embodiment, the illusion moving image data generated by the illusion image generating device 20 is recorded in the portable memory M, and the display device 10 reads and displays the illusion moving image data recorded in the portable memory M. Of course, the illusion moving image data may be transmitted from the illusion image generation device 20 to the display device 10 via various communication media.

  The display device 10 includes an optical unit L, an image forming unit C, and a user I / F unit D. The optical unit L includes a light source L1, a spectroscopic optical system L2, a liquid crystal panel L3, a combining optical system L4, and a projection lens L5. The light source L1 is a light source that generates projection light to be projected onto the road surface of the road R. The light source L1 may be any light source, but is desirably a laser light source in order to ensure the visibility of the illusion image I regardless of the ambient light.

  The spectroscopic optical system L2 is an optical system that splits the projection light generated by the light source L1 into RGB three-wavelength components, and may be, for example, an optical system using a dichroic mirror. The liquid crystal panel L3 is provided corresponding to each of the three wavelength components of RGB. The liquid crystal panel L3 includes a liquid crystal element that can adjust the transmittance of projection light for each pixel. The synthesizing optical system L4 is an optical system that synthesizes RGB three-wavelength components transmitted through the liquid crystal panel L3. The projection lens L5 is a lens that projects the projection light synthesized by the synthesis optical system L4 onto the road surface of the road R.

  The user I / F unit D includes an input unit that receives an operation of an operator of the display device 10 and a display unit that displays an operation status of the display device 10 and the like. The support unit 11 may be configured so that the operator can climb the support unit 11 and operate the display device 10, or the user I / F can be remotely operated from the shoulder of the road R or the like. The unit D and the controller C1 of the image forming unit C may be configured to communicate with each other.

  The image forming unit C is a computer including a controller C1, an image input unit C2, an image processing unit C3, a distortion correction unit C4, and a liquid crystal driver C5. The image forming unit C may be realized by software (display program), may be realized by a hardware circuit, or may be realized by a combination thereof.

  The controller C1 controls the image input unit C2, the image processing unit C3, the distortion correction unit C4, and the liquid crystal driver C5 based on the operation received by the user I / F unit D. The image input unit C2 reads illusion moving image data recorded in the portable memory M. Specifically, the image input unit C2 reads the illusion moving image data selected by the selection operation in the user I / F unit D as the illusion moving image data to be displayed. The image processing unit C3 performs various types of image processing on each frame (illusion image I) constituting the illusion video data. For example, the image processing unit C3 may perform color correction processing such as brightness correction, color balance correction, contrast correction, and gamma correction.

  The distortion correction unit C4 corrects the illusion moving image data so that an image similar in shape to the input illusion image I is projected onto the road surface. Specifically, the distortion correction unit C4 geometrically corrects the illusion moving image data so as to compensate for the distortion of the projected image caused by the difference in the optical path length to the road surface of the light beam corresponding to each pixel of the illusion moving image data. The liquid crystal driver C5 sequentially acquires the illusion image I of each frame of the illusion moving image data for each RGB channel, and a drive signal for driving the liquid crystal element according to the color gradation value of each pixel of the illusion image I. And outputs the drive signal to the liquid crystal panel L3. The display device 10 may not be a liquid crystal projector, but may be a DLP projector or the like.

  Next, the illusion image I will be described. 3A and 3B show a front view of a passenger (passerby) of a vehicle traveling backward on the road R. FIG. That is, when a passerby visually recognizes the road R, a forward landscape as shown in FIGS. 3A and 3B is visually recognized. As shown in FIGS. 3A and 3B, the passerby visually recognizes the projecting object P and the non-projecting object F. FIG. 8 shows an actual image (photograph) of FIG. 3B.

  The protruding object P is a rectangular sign that protrudes vertically upward from the road R as a road structure and has characters indicating “in reverse running”. Further, the protruding object P is a plane perpendicular to the reverse running direction U. In the protruding object P, a character indicating “in reverse running” is a red character with a white border on a gray background. The background, the characters, and the border need only be different colors, and any of lightness, hue, and saturation may be different.

  The non-projecting object F is a projection image that imitates a rectangular frame-like paint attached to the surface of the road surface of the road R. Of the four sides of the non-projecting object F, two sides are parallel to the section line of the lane, and the other two sides are perpendicular to the section line of the lane. The non-projecting object F is a projection image that imitates the paint in which the white rectangular frame is painted black, and a part of the non-projecting object F is shielded by the projecting object P. That is, the non-protruding object F has a length in the depth direction, and the protruding object P protrudes from a position in the depth direction, so that a portion in front of the protruding object P (a direction farther away from the passerby). Is viewed as being shielded by the protruding object P. That is, a part of the non-projecting object F exists in the blind spot formed by the projecting object P, and is not visible.

  The illusion image I constitutes a moving image. That is, the illusion image I corresponds to each frame constituting the moving image, and the moving image is displayed by switching the illusion image I in time series and displaying it. The illusion image I constitutes a moving image in which the height at which the protruding object P protrudes from the road surface of the road R changes in the forward scenery of the passerby.

  The time when the forward scenery shown in FIG. 3A is visually recognized is later than the time when the forward scenery shown in FIG. 3B is visually recognized. Therefore, the illusion image I is changed over time so that the passerby can see the front scenery so that the height of the projecting object P gradually increases as time elapses. In addition, the projected object P is visually observed to gradually float from the black portion inside the non-projecting object F. Note that the form of the non-projecting object F does not change with time. However, in a frame (not shown) where the height of the projecting object P is low, the blind spot due to the projecting object P becomes small, and the portion shielded by the projecting object P changes.

  In the configuration of the present embodiment described above, the illusion image I is formed on the road structure (the road surface of the road R), so that when the projecting object P projects toward the passing track, the passerby can visually recognize the illusion. To do. Since the passerby visually recognizes the protruding object P protruding toward the passing track, it is possible to perform display with excellent visibility from a distance. In addition, the attention of the passerby can be strongly attracted by the protruding object P protruding toward the passage.

  Here, the illusion image I constitutes a moving image that a passer-by sees as if the protruding object P is moving. Thereby, attention to the protruding object P can be attracted and the protruding object P can be reliably recognized.

  The optical illusion image I is an image that a passer-by can see when the non-projecting object F exists on the road structure (the road surface of the road R) together with the projecting object P. Since the projecting object P is visually recognized together with the non-projecting object F, a visual effect such that the projecting object P projects by contrasting with the non-projecting object F can be emphasized.

  The illusion image I is an image that is visually observed when a part of the non-projecting object F is blocked by the projecting object P. Thus, by shielding a part of the non-projecting object F with the projecting object P, an impression that the projecting object P projects can be strongly given. That is, since the projecting object P projects, it is possible to give a strong impression that a blind spot is formed in a part of the non-projecting object F.

  Further, the illusion image I is an image that a passerby visually recognizes on the protruding object P as if a character having a border is attached. Thereby, a character can be represented by two or more colors, and the legibility of the character can be ensured without being influenced by the situation of the ambient light irradiated to the road structure (reverse running direction U). .

(2) Configuration of the illusion image generation device:
As shown in FIG. 2, the illusion image generation apparatus 20 includes an image generation unit G and a user I / F unit E. The image generation unit G is a computer including a CPU, a RAM, a ROM, and the like, and by executing a program recorded in the ROM or the like, a protruding image generation unit G1, a non-protruding image generation unit G2, and an image as a functional configuration unit The combining unit G3 is realized. The user I / F unit E includes an input unit that receives an operation of the operator of the display device 10 and a display unit that displays an operation status of the display device 10 and the like. The illusion image generation apparatus 20 includes a memory writer (not shown) that records illusion video data in the portable memory M.

  The protruding image generation unit G1 includes a stereoscopic image generation unit G1a and a coordinate conversion unit G1b. The stereoscopic image generation unit G1a generates an image of a sign indicating “in reverse running” as the protruding object P. Specifically, the protruding image generation unit G1 generates, as a three-dimensional image, an image that specifies the color of each position on the protruding object P by three-dimensional coordinates (XYZ coordinates) on the road R. Here, the X axis is an axis in the reverse running direction U, the Y axis is an axis in the width direction of the road R, and the Z axis is an axis in the vertical direction.

  The pixels of the stereoscopic image corresponding to the planar rectangular protruding object P shown in FIGS. 3A and 3B are distributed in a rectangular range in the Z-axis direction and the Y-axis direction, and the coordinates in the X-axis direction are all the same. . The coordinate conversion unit G1b converts the stereoscopic image into an image (projection image PI) projected on the road surface of the road R. For this purpose, the coordinate conversion unit G1b sets the viewpoint reference position V of the passerby. 4 and 5 are schematic diagrams for explaining the conversion into the protruding image PI.

  4 and 5 are views in which the road surface of the road R is seen from behind and above the viewpoint reference position V of the passerby who visually recognizes FIGS. 3A and 3B. The coordinate conversion unit G1b sets the average eye height (for example, 1 to 1.5 m) of the driver who drives the vehicle as the coordinate in the Z-axis direction of the viewpoint reference position V, and moves backward from the protruding object P. A position retroactive by a certain distance (for example, 30 to 50 m) in the direction opposite to U is set as the coordinate in the X-axis direction of the viewpoint reference position V. The coordinate conversion unit G1b sets the center position in the width direction of the road R of the driver who drives the vehicle as the coordinate in the Y-axis direction of the viewpoint reference position V. Note that the coordinate in the Y-axis direction of the viewpoint reference position V may be offset from the center position in the width direction of the road R by a certain distance toward the driver's seat.

  In the coordinate conversion unit G1b, a straight line (solid line arrow) passing through the viewpoint reference position V and the pixel N of the stereoscopic image corresponding to the protruding object P (broken line in FIGS. 4 and 5) intersects the road surface of the road R. The coordinates (Z = 0) of the projection point Q are calculated. The projection point Q corresponding to an arbitrary pixel N of the stereoscopic image exists in the trapezoidal region surrounded by the projection points Q1 to Q4 of the pixels N1 to N4 of the stereoscopic image corresponding to the four corners of the protruding object P. Become. The coordinate conversion unit G1b generates a protruding image PI that is an image on the road surface of the road R by moving the pixel N of the stereoscopic image to the projection point Q. The protruding image PI is an image in which each pixel has coordinates in the X-axis direction and the Y-axis direction.

  6A and 6B are diagrams showing an illusion image I. FIG. 6A and 6B are images of FIG. 4 and FIG. 5 looking down from the top to the bottom vertically. For simplification of the drawing, the illustration of “in reverse running” is omitted in FIGS. 4, 5, 6A, and 6B. As shown in FIGS. 6A and 6B, the optical illusion image I includes a trapezoidal protruding image PI obtained by projecting a stereoscopic image corresponding to the protruding object P onto the road surface of the road R from the viewpoint reference position V. The stereoscopic image generation unit G1a generates a stereoscopic image for each of the protruding objects P having different heights for each frame, and generates a protruding image PI for each frame by projecting the stereoscopic image on the road surface of the road R. In addition, a character may blink or a color and a position may change, and the three-dimensional image generation part G1a may generate | occur | produce the three-dimensional image from which a character state differs for every flame | frame. However, by displaying the optical illusion image as a moving image, the display itself is visually recognized as a flashing display, so it is possible to notify the passerby of the presence of the display considerably before the position where “during reverse running” is read. .

The non-projecting image generation unit G2 generates a non-projecting image FI corresponding to the non-projecting object F. Since the non-projecting object F is an object existing on the road surface of the road R, the non-projecting image FI is an image in which each pixel has coordinates in the X-axis direction and the Y-axis direction. The non-projecting image generation unit G2 generates a non-projecting image FI indicating a rectangular frame-shaped non-projecting object F surrounded by two sides in the X-axis direction and two sides in the Y-axis direction.
The non-projecting image FI does not change between frames, and the non-projecting image generation unit G2 generates one non-projecting image FI.

  The image composition unit G3 generates the illusion image I by compositing the protruding image PI and the non-projecting image FI. Specifically, the image composition unit G3 superimposes the protruding image PI on the non-projecting image FI, and fills a region where the non-projecting image FI and the protruding image PI do not exist (hatching) with an illusion. An image I is generated. In addition, a colorless pixel means the pixel which the display apparatus 10 does not project any light with respect to the road surface of the road R, and the passerby means the pixel which visually recognizes the color of the road R itself.

  The image composition unit G3 generates an illusion image I of each frame by superimposing the protruding image PI of each frame on the non-projecting image FI. The image composition unit G3 employs the color of the protruding image PI for pixels where both the non-projecting image FI and the protruding image PI exist. That is, the non-projecting object F is shielded by the projecting object P in a portion where both the non-projecting image FI and the projecting image PI exist. In each frame, the position of the opposite end of the protruding image PI in the backward running direction U matches the position of the opposite side of the backward running direction U of the inner portion (black) of the rectangular frame-shaped non-projecting image FI. To do. The image composition unit G3 stores the illusion image I of each frame in the illusion moving image data that is one moving image file and records it in the portable memory M.

(3) Display processing:
Next, display processing executed by the display device 10 to which the portable memory M in which illusion video data is recorded is mounted will be described. FIG. 7 is a flowchart of the display process. First, the controller C1 accepts an operation for selecting illusion video data (step S100). That is, the controller C1 receives selection of illusion video data to be displayed based on an operation on the user I / F part D. A plurality of optical illusion video data can be recorded in the portable memory M. Even if the illusion video data to be displayed is selected automatically or manually according to various conditions (vehicle traffic, time zone, season, etc.). Good.

  Next, the controller C1 accepts a display mode selection operation (step S110). That is, the controller C1 accepts selection of the display mode of the illusion video data based on the operation on the user I / F part D. The display mode of the present embodiment is either a normal mode in which the illusion moving image data is displayed only once or a repetition mode in which the illusion moving image data is repeatedly displayed.

  Next, the image input unit C2 reads illusion moving image data (step S120). That is, the illusion moving image data read from the portable memory M is transferred to a work area such as a RAM. Next, the image processing unit C3 acquires the illusion image I frame by frame (step S130). That is, the image processing unit C3 acquires the illusion image I included in the illusion moving image data frame by frame in order from the earliest display order.

  Next, the image processing unit C3 and the distortion correction unit C4 perform image processing and distortion correction (step S140). That is, the image processing unit C3 performs color correction processing such as brightness correction on the illusion image I. The distortion correction unit C4 geometrically corrects the illusion moving image data so that an image similar in shape to the illusion image I is projected onto the road surface of the road R.

  Next, the liquid crystal driver C5 projects the current frame (illusion image I) (step S150). That is, the liquid crystal driver C5 generates a drive signal for driving the liquid crystal element based on the illusion image I, and outputs the drive signal to the liquid crystal panel L3. As a result, the illusion image I is projected on the road surface of the road R.

  Next, the controller C1 determines whether or not it is the last frame (step S160). That is, the controller C1 determines whether or not the illusion image I projected on the road surface of the road R is the last frame of the illusion video data. If it is not determined that it is the last frame (step S160: N), the controller C1 returns to step S130. Thereby, the display apparatus 10 can update and display the illusion image I until the final frame.

  As described above, the passerby can visually recognize the protruding object P protruding upward from the road surface of the road R so as to move upward. Note that the display cycle for projecting the illusion image I in step S150 matches the frame rate defined in the illusion video data.

If it is not determined that the frame is the last frame (step S160: N), the controller C1 determines whether or not the display mode is the repeat mode (step S170). When it is determined that the display mode is the repeat mode (step S170: Y), the controller C1 returns to step S120 and repeats the display of the illusion video data. On the other hand, when it determines with it being the last frame (step S160: Y), the controller C1 complete | finishes a display process.
In the above-described embodiment, the example in which the protruding object P protrudes from the non-projecting object F on the trajectory as shown in FIGS. 3B and 3A has been described. Even if the displayed images are alternately displayed, the passerby can be visually recognized as an image protruding from the road surface.

(4) Other embodiments:
In the present invention, the illusion image I may constitute a moving image that changes according to the movement of the viewpoint of the passer-by so that the passer-by can visually recognize that the protruding object has a fixed shape. Here, when viewed from the viewpoint reference position V, the optical illusion image I is an image that is viewed so that the rectangular protruding object P is not distorted. However, if the actual viewpoint of the passerby is deviated from the viewpoint reference position V, the projected object P is visually recognized as being distorted. Since the amount of deviation between the viewpoint position of the passerby in the vehicle running in reverse and the viewpoint reference position V changes, the protruding object P is visually perceived as deforming according to the position of the vehicle. It will be.

  Therefore, the illusion image generation apparatus 20 may create an illusion image I (protruding image PI) as shown in FIGS. 4 and 5 for each of the plurality of viewpoint reference positions V in the X-axis direction. The display device 10 may project the optical illusion image I at the viewpoint reference position V closest to the position of the passer's viewpoint on the road surface of the road R for each display cycle.

  For example, the display device 10 may be configured to be communicable with a vehicle detector 30 (a broken line in FIG. 2) that detects a vehicle that runs backward and its vehicle speed. Then, the controller C1 of the display device 10 calculates the position of the viewpoint of the passerby for each display cycle based on the vehicle speed of the vehicle that runs backward, and the illusion image of the viewpoint reference position V closest to the position of the passer's viewpoint. I is projected onto the road surface of road R. If an illusion image I is prepared for each combination of the position of the passer's viewpoint and the position of the protruding object P in the height direction, the protruding object P moves so as to move upward while maintaining a fixed shape. Can be viewed by the viewer.

  In the embodiment, the display device 10 performs distortion correction so that an image similar to the illusion image I generated by the illusion image generation device 20 is projected onto the road surface of the road R. However, the illusion image generation device 20 may generate the illusion image I in advance so as to compensate for distortion caused by the installation position of the display device 10 and the road surface shape of the road R. In this case, the process of the distortion correction unit C4 may be skipped. Furthermore, when the illusion image I includes only the protruding image PI, the illusion image I in which the passerby makes an illusion may be generated using geometric correction in the distortion correction unit C4.

  In addition, the road structure on which the illusion image I is formed may not be the road surface of the road R, but a display installed on the shoulder of the road as shown in FIG. The illusion image I may be generated so as to project from the device 10 and protrude from the wall surface to the road. The surface on which the illusion image I is projected may be a structure having a surface shape other than a plane. In such a case, by using a correction method performed in projection mapping or the like, an illusion image I in which a passerby illusions can be formed on a road structure other than a plane. Further, a single optical illusion image I may be displayed by a plurality of different projectors arranged so that the projection areas are continuous.

  Further, the projecting object P may be a solid having a thickness in the X-axis direction, for example, a large number of projections on the road surface illusioning a traffic obstacle. The direction in which the projecting object P moves may be the X-axis direction, the Y-axis direction, or a combination of two or more directions of the X-axis direction, the Y-axis direction, and the Z-axis direction. It may be. The vehicle may be guided in the X-axis direction by moving the protruding object P in the X-axis direction. Similarly, the vehicle may be guided in the Y-axis direction by moving the protruding object P in the Y-axis direction. Furthermore, the display device 10 may be mounted on a vehicle used by a road administrator or the like.

  Further, as in the present invention, a method of forming an illusion image on the road structure, which is an image that the passerby visually recognizes by illusion when a projecting object projects toward the passer's passage, It can also be applied as a method. In addition, the system, program, and method as described above may be realized as a single device or may be realized using components shared with other units of other devices, and include various aspects. It is a waste. Further, some changes may be made as appropriate, such as a part of software and a part of hardware. Furthermore, the invention is also established as a recording medium for a program for controlling the apparatus. Of course, the software recording medium may be a magnetic recording medium, a semiconductor memory, or any recording medium that will be developed in the future.

DESCRIPTION OF SYMBOLS 10 ... Display apparatus, 11 ... Support part, 20 ... Illusion image generation apparatus, 30 ... Vehicle detector, C ... Image formation part, C1 ... Controller, C2 ... Image input part, C3 ... Image processing part, C4 ... Distortion correction part , C5 ... Liquid crystal driver, D, E ... User I / F unit, F ... Non-projecting object, FI ... Non-projecting image, G ... Image generating unit, G1 ... Projecting image generating unit, G1a ... Stereoscopic image generating unit, G1b ... Coordinate conversion unit, G2 ... non-projecting image generation unit, G3 ... image synthesis unit, I ... illusion image, L ... optical unit, L1 ... light source, L2 ... spectral optical system, L3 ... liquid crystal panel, L4 ... synthesis optical system, L5 Projection lens, M ... Portable memory, N ... Pixel, P ... Projecting object, PI ... Projecting image, Q ... Projection point, R ... Road, U ... Reverse running direction, V ... Viewpoint reference position

Claims (9)

An image forming unit that forms an illusion image on the road structure, which is an image that the passerby visually recognizes by illusion when a projecting object projects toward a pass orbit of the passer;
Display device. The illusion image constitutes a moving image,
The display device according to claim 1. The optical illusion image constitutes a moving image that the passer-by sees as the protruding object is moving,
The display device according to claim 1. The optical illusion image constitutes a moving image that changes according to the movement of the viewpoint of the passer so that the passer can visually recognize the protruding object maintaining a certain shape.
The display device according to claim 2. The optical illusion image is an image that the passerby visually recognizes that there is a non-projecting object on the road structure together with the projecting object.
The display device according to any one of claims 1 to 4. The optical illusion image is an image for visually observing that a part of the non-projecting object is shielded by the projecting object.
The display device according to claim 5. The optical illusion image is an image that the passer-by visually recognizes as a character having a border on the protruding object.
The display device according to any one of claims 1 to 6. Forming an optical illusion image on the road structure, which is an image that the passer-by sees by an optical illusion when a protruding object projects toward the pass orbit of the passer-by,
Display method. Computer
When a projecting object protrudes on the pass orbit of the passerby, it functions as an image forming unit that forms an optical illusion image on the road structure, which is an image visually viewed by the passerby.
Display program.