JPWO2012060386A1 - Image generation method, image generation program, and image projection apparatus - Google Patents

Abstract

It is an object to provide a highly immersive image while suppressing image production costs. A three-dimensional object that moves in the virtual three-dimensional space and a virtual camera that uses a predetermined position in the virtual three-dimensional space as a viewpoint position are set. Then, the angle of the three-dimensional object is changed according to the position of the three-dimensional object from the virtual camera. After that, a three-dimensional object whose angle has been changed is picked up by a virtual camera to generate an image.

Description

  Embodiments disclosed herein relate to an image generation method, an image generation program, and an image projection apparatus.

  2. Description of the Related Art Conventionally, an image projection apparatus that allows an observer to visually recognize a stereoscopic image is known. This type of image projection apparatus makes a viewer visually recognize a stereoscopic image by using parallax between both eyes of the viewer.

  Specifically, the image projection device projects the right-eye image and the left-eye image on the screen in a superimposed manner. The image for the right eye and the image for the left eye projected on the screen enter the observer's eyes via the stereoscopic glasses. That is, the right-eye image is projected onto the viewer's right eye and the left-eye image is projected onto the viewer's left eye via the stereoscopic glasses. The right eye image and the left eye image are parallax images having parallax. Therefore, the observer visually recognizes the parallax image as a stereoscopic image.

  Various methods have been developed as a method for allowing an observer to visually recognize a three-dimensional image through stereoscopic glasses, such as a color filter method and a polarization method.

  The color filter method is a method using stereoscopic glasses in which a right eye image and a left eye image projected on a screen are formed in different colors, and different color filters are arranged on the left and right. In addition, the polarization method is a method using stereoscopic glasses in which a right eye image and a left eye image projected on a screen are formed with light having different polarization directions, and polarizing filters having different polarization directions are arranged on the left and right. is there.

  By the way, in the conventional image projection apparatus using the stereoscopic glasses, the parallax image itself forming the stereoscopic image is small, so that the immersion feeling in the pseudo space by the stereoscopic image is poor. That is, the user cannot feel that he / she is present in the virtual space expressed as a stereoscopic image, and is not different from a general two-dimensional image.

  Therefore, a new image projection apparatus has been developed in order to provide a highly immersive image. In this image projection apparatus, the screen is a cylindrical body having an inner peripheral surface as a screen surface, and a plurality of image projection means are arranged to face the screen surface. Then, a series of images are formed in the circumferential direction by arranging the parallax images projected by each of the image projecting units along the circumferential direction of the screen surface (see Patent Document 1).

JP 2008-287120 A

  In the technique described in Patent Document 1, the parallax image projected by the image projection unit is an image obtained by dividing the parallax image into 30 degrees or less in the circumferential direction of the screen surface. The reason for using the image divided in the circumferential direction of 30 degrees or less on the screen surface in this way is to maintain the continuity of the moving object at the joint portion of the adjacent images.

  However, in the technique described in Patent Document 1, an image divided into 30 degrees or less in the circumferential direction of the screen surface must be generated. Therefore, when projecting a visual image on the entire 360 degree screen, it is necessary to create 12 or more images divided into 30 degrees or less in the circumferential direction of the screen surface, and it has been difficult to reduce image production costs.

  In view of the above, an object of one embodiment is to provide an image generation method, an image generation program, and an image projection apparatus that can provide a highly immersive image while suppressing image production costs.

  An image generation method according to an aspect of an embodiment sets a three-dimensional object that moves in a virtual three-dimensional space, sets a virtual camera having a predetermined position in the virtual three-dimensional space as a viewpoint position, and The angle of the three-dimensional object is changed according to the position of the three-dimensional object, and the three-dimensional object with the changed angle is imaged by the virtual camera to generate an image.

  According to the image generation method, the image generation program, and the image projection apparatus according to one aspect of the embodiment, it is possible to provide an image with a high immersive feeling while suppressing image production costs.

FIG. 1 is a schematic diagram showing the positional relationship between a three-dimensional object moving in a virtual three-dimensional space and a virtual camera. FIG. 2 is a schematic diagram illustrating a positional relationship between the moving path of the three-dimensional object and the viewpoint of the virtual camera. FIG. 3 is a schematic diagram illustrating an example of an image obtained by capturing a three-dimensional object with a virtual camera. FIG. 4 is a schematic diagram showing a positional relationship between a three-dimensional object moving in the virtual three-dimensional space and a plurality of virtual cameras. FIG. 5 is a schematic diagram showing a positional relationship between a moving path of a three-dimensional object and viewpoints of a plurality of virtual cameras. FIG. 6 is a schematic diagram illustrating an example of an image obtained by capturing a three-dimensional object with a plurality of virtual cameras. FIG. 7 is a schematic diagram showing the relationship between each position on the moving path of the three-dimensional object and the angle from each virtual camera. FIG. 8 is a diagram for explaining setting of a three-dimensional object. FIG. 9A is a diagram for explaining setting of the divided space. FIG. 9B is a diagram for explaining setting of the divided space. FIG. 10 is a schematic diagram showing the positional relationship between the moving path of the three-dimensional object and the viewpoint of the virtual camera. FIG. 11 is a diagram for explaining angle correction of a three-dimensional object. FIG. 12 is a schematic diagram illustrating an example of an image obtained by capturing an angle-corrected three-dimensional object with a virtual camera. FIG. 13 is a diagram for explaining an example of angle correction of a three-dimensional object. FIG. 14 is a diagram for explaining an example of angle correction of a three-dimensional object. FIG. 15 is a diagram for explaining an example of angle correction of a three-dimensional object. FIG. 16 is a schematic diagram showing a positional relationship between the moving path of the three-dimensional object and the viewpoint of the virtual camera. FIG. 17 is a diagram for explaining angle correction of a three-dimensional object. FIG. 18A is a schematic perspective view of an image projection apparatus according to an embodiment. 18B is an explanatory diagram of a configuration inside the handrail shown in FIG. 18A. FIG. 19 is a schematic cross-sectional view of the image projection apparatus shown in FIG. 18A. FIG. 20 is a schematic longitudinal sectional view of the image projector shown in FIG. 18A. FIG. 21 is a block diagram of the image projection apparatus shown in FIG. 18A. FIG. 22 is a block diagram of the information processing apparatus according to the embodiment.

  Hereinafter, embodiments of an image generation method, an image generation program, and an image projection apparatus according to embodiments will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

[1. Image generation method]
The image generation method according to the embodiment will be specifically described with reference to the drawings.

The procedure for enabling the observer to stereoscopically view the three-dimensional object is generally the following procedures (1) to (5).
(1) A three-dimensional object is set in a three-dimensional virtual space.
(2) In the three-dimensional virtual space, a right-eye virtual camera and a left-eye virtual camera having different viewpoint positions are set.
(3) A right-eye image and a left-eye image are respectively captured by a right-eye virtual camera and a left-eye virtual camera to generate a right-eye image and a left-eye image.
(4) The right-eye image and the left-eye image are projected as a projection image onto the screen by being overlapped by the image projection means.
(5) The observer wears stereoscopic glasses when observing the image projected on the screen.

  In the above procedure (1), there are three-dimensional objects that move in the three-dimensional virtual space and three-dimensional objects that do not move as types of the three-dimensional object set in the three-dimensional virtual space. When setting a three-dimensional object that moves in the three-dimensional virtual space, it is not easy for the observer to stereoscopically view the three-dimensional object compared to setting a three-dimensional object that does not move in the three-dimensional virtual space. .

  First, a method for generating a projection image including a three-dimensional object moving in a three-dimensional virtual space will be described with reference to FIGS. Here, one of the virtual camera that captures the image for the right eye and the virtual camera that captures the image for the left eye will be described. However, the other virtual camera is the same as the one virtual camera.

As shown in FIG. 1, a virtual camera having a three-dimensional object 10 that moves in a virtual three-dimensional space along a movement path 11 and a predetermined imaging region 22 ₁ with a predetermined position in the virtual three-dimensional space as a viewpoint position. consider the case of 20 ₁ and is set. Assume that the positional relationship between the movement path 11 of the three-dimensional object 10 and the viewpoint position 21 ₁ of the virtual camera 20 ₁ is as shown in FIG.

The moving path 11 along which the three-dimensional object 10 moves is a path orthogonal to the optical axis O ₁ of the virtual camera 20 ₁ as shown in FIG. Therefore, depending on which position on the movement route 11 is 3-dimensional object 10, the orientation of the three-dimensional object 10 viewed from the virtual camera 20 ₁ is different.

For example, the three-dimensional object 10 at the position on the optical axis O ₁ of the virtual camera 20 ₁ (position 12 ₂ shown in FIG. 2), when captured by the virtual camera 20 _1, when the image shown on the left side of FIG. 3 To do.

In this case, if the three-dimensional object 10 is at the position 12 ₁ shown in FIG. 2, the image captured by the virtual camera 20 ₁ is the image shown in the center of FIG. That is, the image of the three-dimensional object 10 shown on the left side in FIG.

On the other hand, if the three-dimensional object 10 is at the position 12 ₃ shown in FIG. 2, the image captured by the virtual camera 20 ₁ is the image shown on the right side of FIG. In other words, the image of the three-dimensional object 10 shown from the left side in the drawing is a little different from the image of the three-dimensional object 10 shown on the left side of FIG.

Thus, depending on which position on the movement route 11 is 3-dimensional object 10, the orientation of the three-dimensional object 10 viewed from the virtual camera 20 ₁ is different. The magnitude of the change in the direction of the three-dimensional object 10 varies depending on the size of the imaging region 22 ₁ of the virtual camera 20 ₁ . For example, if the imaging region 22 ₁ of the virtual camera 20 ₁ is a imaging region of angle content of 60 degrees, with respect to the three-dimensional object 10 in the optical axis O ₁ of the virtual camera 20 _1, the virtual camera 20 _first imaging area The three-dimensional object 10 located at both ends of 22 ₁ is an image viewed from the side by about 30 degrees.

However, the image to be projected by the image projecting means on the screen, when an image captured by one of the virtual camera 20 ₁ is no sense of discomfort to the viewer be an image such as shown in FIG. This is because the direction of the three-dimensional object 10 continuously changes when the three-dimensional object 10 moves.

On the other hand, when the image projected on the screen by the image projecting unit is formed by continuously forming the images picked up by the plurality of virtual cameras 20 ₁ and 20 ₂ , there is a problem that the direction of the three-dimensional object 10 becomes discontinuous. Occur.

  Here, the discontinuity of the direction of the three-dimensional object 10 will be described with reference to FIGS.

As shown in FIG. 4, the virtual three-dimensional space, in addition to the virtual camera 20 ₁ having an imaging region 22 _1, further disposing the virtual camera 20 ₂ having an imaging region 22 ₂ adjacent to the imaging region 22 _1. At this time, the positional relationship between the movement path 11 of the three-dimensional object 10 and the viewpoint position 21 ₂ of the virtual camera 20 ₂ is as shown in FIG. In addition, it is assumed that the imaging regions 22 ₁ and 22 _{2 of the} virtual cameras 20 ₁ and 20 ₂ are imaging regions for an angle of view of 60 degrees. In the following, when any or all of the virtual cameras 20 ₁ and 20 ₂ are shown, the virtual camera 20 may be used. In addition, when an imaging region including the imaging region 22 ₁ and the imaging region 22 ₂ is shown, the imaging region 22 may be used.

It is assumed that the three-dimensional object 10 moves from the position 12 ₁ to the position 12 ₆ shown in FIG. 5 from time t ₁ to time t ₆ . In this case, the time t _1, t _2, t _3, the image of the three-dimensional object 10 being imaged by the virtual camera 20 ₁ is an image shown on the left side of Figure 6, respectively. Further, the images of the three-dimensional object 10 captured by the virtual camera 20 _{2 at} the times t ₄ , t ₅ , and t ₆ are images shown on the right side of FIG.

As described above, the image of the three-dimensional object 10 being imaged by one of the virtual camera 20 _1, since the orientation of the three-dimensional object 10 is continuously changed, does not become discontinuous. However, as shown in FIG. 6, the image at time t _{3 and} the image at time t ₆ are mirror-symmetric images. Therefore, when the three-dimensional object 10 is moved from the imaging region 22 ₁ of one of the virtual camera 20 ₁ other virtual camera 20 ₂ of the imaging region 22 _2, orientation of the three-dimensional object 10 captured from the virtual camera 20 It becomes discontinuous.

The discontinuity occurs in this way, even though the positions 12 ₃ and 12 ₄ are close to each other, the position of the three-dimensional object 10 viewed from the virtual camera 20 ₁ and the position viewed from the virtual camera 20 ₂ . This is because the position of the three-dimensional object 10 is greatly different. This point will be described with reference to FIG.

The relationship between each position on the moving path 11 including the positions 12 ₁ to 12 ₆ and the angles from the virtual cameras 20 ₁ and 20 ₂ can be expressed as shown in FIG. In FIG. 7, the horizontal axis indicates the movement path 11, and the vertical axis indicates the angle from the virtual cameras 20 ₁ and 20 _{2 with} respect to each position of the movement path 11. Incidentally, the optical axis O ₂ direction of the virtual camera 20 ₁ of the optical axis O ₁ direction and virtual camera 20 ₂ and the direction of each 0 °, the direction of the position 12 ₁ side as viewed from the virtual camera 20 ₁ + a direction of the side the direction of the position 12 ₃ side when viewed from the virtual camera 20 ₁ - is the direction of the side.

As shown in FIG. 7, in the imaging region 22 ₁ of the virtual camera 20 _1, a position closest to the imaging region 22 ₂ of the virtual camera 20 _2, direction as viewed from the virtual camera 20 ₁ and most - in the direction of the side . On the other hand, of the virtual camera 20 ₂ of the imaging region 22 _2, a position closest to the imaging region 22 ₁ of the virtual camera 20 _1, the direction as viewed from the virtual camera 20 ₂ is in the direction of the most positive side.

Therefore, when the three-dimensional object 10 is moved from the imaging region 22 ₁ of one of the virtual camera 20 ₁ of the other virtual camera 20 ₂ in the imaging area 22 _2, a virtual camera 20 viewed from the direction of the three-dimensional object 10 - It changes abruptly from the side direction to the + side direction.

Accordingly, when the images captured by the virtual cameras 20 ₁ and 20 ₂ are images projected onto the screen by the image projection unit, the images are captured when the three-dimensional object 10 moves from the imaging region 22 ₁ to the imaging region 22 ₂ . The direction of the three-dimensional object 10 is discontinuous. Therefore, an observer visually recognizes an image that has a sense of incongruity.

The discontinuity in the direction of the three-dimensional object 10 increases as the imaging area 22 of the virtual camera 20 increases, resulting in an image with a sense of discomfort. For example, when the virtual camera 20 _1, 20 ₂ of the imaging region 22 _1, 22 ₂ is an imaging region of the angle portion of 90 degrees, the virtual camera 20 _1, 20 ₂ of the imaging region 22 _1, 22 ₂ is 60 degrees The discontinuity of the three-dimensional object 10 is further increased as compared with the case where the imaging area is for the angle of view.

  In view of this, a technique is proposed in which images for an angle of view of 30 degrees or less are continued. The image for the angle of view of 30 degrees or less is captured by the virtual camera 20 having the imaging region 22 corresponding to the image for the angle of view of 30 degrees or less, or 30 of the images captured by the virtual camera 20, for example. It can be generated by cutting out an image corresponding to an angle of view of less than or equal to degrees.

  By doing in this way, it can suppress that the direction seen from the virtual camera 20 with respect to the three-dimensional object 10 changes rapidly from the-side direction to the + side direction. Therefore, discontinuity in the direction of the three-dimensional object 10 can be reduced, and the discomfort experienced by the observer when images taken by the plurality of virtual cameras 20 are projected onto the screen by the image projection means can be reduced.

  However, for example, when an imaging region 22 having a size as shown in FIG. 4 is necessary, that is, when an image corresponding to a 120-degree angle of view is required, four images corresponding to a 30-degree angle of view must be continued. is there. For this reason, the image generation processing increases, and there is a problem in terms of image production costs.

  Moreover, since the discontinuity of the orientation of the three-dimensional object 10 becomes more conspicuous as the screen on which the image is projected becomes larger, the width of each of the plurality of continuous images can be reduced according to the size of the screen. It may be desirable. For example, even if there is no sense of incongruity in an image for an angle of view of 30 degrees on a screen of a certain size, if the screen size is doubled, a sense of incongruity will appear. In some cases, an image with a smaller angle of view than an image of a corner is desirable.

  As described above, in order to suppress discontinuity in the direction of the three-dimensional object 10, when images having an angle of view of 30 degrees or less are continued, the image generation processing increases, which reduces the image production cost. There is a problem in terms of view. In particular, as the screen becomes larger, it is desirable to generate an image with a smaller angle of view, so the image production cost may further increase.

  In view of this, an image generation method is proposed in which even if images with an angle of view exceeding 30 degrees are consecutive, an uncomfortable feeling by an observer can be significantly suppressed. Hereinafter, the image generation method according to the present embodiment will be specifically described with reference to the drawings.

(3D object setting)
First, as shown in FIG. 8, a plurality of three-dimensional objects that move in the horizontally long three-dimensional virtual space 1 and a three-dimensional object that does not move are set. The movement position of the three-dimensional object moving in the three-dimensional virtual space 1 is defined every predetermined time (for example, 1/60 seconds). In the three-dimensional virtual space 1, the x direction is the left-right direction, the y direction is the up-down direction, and the z direction is the front-back direction. In the three-dimensional virtual space 1, the left side surface region 2a and the right side surface region 2b are virtually continuous.

(Division of 3D virtual space)
Next, the three-dimensional virtual space 1 is divided into a plurality of three-dimensional virtual spaces. Here, in order to generate the right-eye image, as an example, as shown in FIG. 9A, the three-dimensional virtual space 1 is divided into six in the x direction, and the three-dimensional virtual space 1 is divided into three-dimensional virtual space ( Hereinafter, it is divided into 3a to 3f.

  Similarly to the case of the right eye image, in order to generate the left eye image, the three-dimensional virtual space 1 is divided into six divided spaces 4a to 4f as shown in FIG. 9B. One divided space 4a is formed by the three-dimensional virtual spaces 4a1 and 4a2. Thus, the reason for dividing the three-dimensional virtual space 1 between the right-eye image and the left-eye image is that the viewpoint position of the virtual camera described later is different between the right-eye image and the left-eye image. is there.

(Angle correction of 3D objects)
Next, the angle correction of the three-dimensional object is performed for each of the divided spaces 3a to 3f and 4a to 4f. Hereinafter, the angle correction of the three-dimensional object 13 existing in the divided space 3a will be specifically described with reference to FIGS. The angle correction of the three-dimensional object 13 is performed every predetermined sampling time (for example, 1/60 seconds). In the divided spaces 3b to 3f and 4a to 4f, the angle correction of the three-dimensional object is performed in the same procedure.

First, as shown in FIG. 10, a virtual camera 25 is set with a predetermined position in the divided space 3 a as a viewpoint position 26. The setting of the virtual camera 25 is a setting of the position of the virtual camera 25, and the virtual camera 25 itself may not be set. Here, it is assumed that the three-dimensional object 13 moves on the movement route 14. The three-dimensional object 13 corresponds to the three-dimensional object 10 (see FIG. 1), the movement path 14 corresponds to the movement path 11 (see FIG. 2), and the positions 14 ₁ to 14 ₃ are the positions 12 ₁ to 12. Corresponds to position 12 ₃ (see FIG. 2).

  Next, the angle of the three-dimensional object 13 in the divided space 3 a is changed according to the position in the x direction from the optical axis O of the virtual camera 25. For example, as shown in FIG. 11, when the three-dimensional object 13 is on the line 15 orthogonal to the optical axis O of the virtual camera 25, the three-dimensional object 13 on the line 15 is changed to a position corresponding to the line 16. Thus, the angle of the three-dimensional object 13 viewed from the virtual camera 25 is changed.

In this way, by changing the angle of the three-dimensional object 13 according to the position from the virtual camera 25, the three-dimensional object that can be seen from the virtual camera 25 regardless of the position of the three-dimensional object 13, as shown in FIG. The direction of 13 can be made constant. FIG. 12 shows an image of the three-dimensional object 13 captured by the virtual camera 25 when the three-dimensional object 13 is at the positions 14 ₂ , 14 ₁ , and 14 ₃ , respectively.

  Thus, in the image generation method according to the present embodiment, it is possible to suppress a change in the direction of the three-dimensional object 13 that can be seen from the virtual camera 25 depending on the position of the three-dimensional object 13. Therefore, when the three-dimensional object 13 moves from the imaging region of one virtual camera 25 to the imaging region of another virtual camera, it is possible to effectively suppress the discontinuity of the orientation of the captured three-dimensional object 13. Can do.

An example of a method for changing the angle of the three-dimensional object 13 in accordance with the position in the x direction from the optical axis O of the virtual camera 25 will be specifically described with reference to FIG. Here, for ease of explanation, only the xz coordinate system at one y-direction position (for example, y = y ₁ ) will be described, but the same applies to any xz coordinate system in the y-direction. Note that the viewpoint position 26 is a position of coordinates (x ₀ , z ₀ ).

As shown in FIG. 13, a three-dimensional object 13 ₁ is arranged as a three-dimensional object 13 in the divided space 3a. The three-dimensional object 13 ₁ has a vertex 13 ₁₁ , a vertex 13 ₁₂ , a vertex 13 ₁₃ , and a vertex 13 ₁₄ in the xz coordinate system at one y-direction position. The coordinates of vertex 13 ₁₁ , vertex 13 ₁₂ , vertex 13 ₁₃ , and vertex 13 ₁₄ are coordinates (x ₁ , z ₁ ), coordinates (x ₂ , z ₁ ), coordinates (x ₁ , z ₂ ), coordinates (x ₂ , z ₂ ).

The vertex 13 ₁₁ and the vertex 13 ₁₂ of the three-dimensional object 13 ₁ are on a line 15 ₁ orthogonal to the optical axis O of the virtual camera 25. Based on this line 15 ₁ , a line 16 ₁ is set. The line 16 ₁ is an arc having the intersection point P ₁ as the contact point with the line 15 ₁ and the same distance from the viewpoint position 26. The intersection point P ₁ is an intersection point between the optical axis O of the virtual camera 25 and the line 15 ₁ .

The calculated vertex 13 ₁₁ on line 15 _1, the vertex 13 ₂₁ on line 16 ₁ corresponding to the vertex 13 _12, the apex 13 _22. The vertex 13 ₂₁ is the position of the coordinates (x ₃ , z ₃ ) moved to the left on the line 16 _{1 by} (x ₀ −x ₁ ) from the intersection point P ₁ in the drawing view. Further, the apex 13 ₂₂ is the position from the intersection P ₁ of (x ₀ -x ₂₎ only coordinates the movement line 16 ₁ on the left side (x _4, z ₄₎ in the drawing view.

Further, the vertex 13 ₁₃ and the vertex 13 ₁₄ of the three-dimensional object 13 ₁ are on a line 15 ₂ orthogonal to the optical axis O of the virtual camera 25. Based on this line 15 ₂ , a line 16 ₂ is set. This line 16 ₂ is an arc having the intersection point P ₂ as a contact point with the line 15 ₂ and being at the same distance from the viewpoint position 26. The intersection P ₂ is an intersection between the optical axis O of the virtual camera 25 and the line 15 ₂ .

The apex 13 ₁₃ on line 15 _2, vertices 13 ₁₄ to corresponding line ₁₆₂ on the vertices 13 ₂₃ calculates the vertex 13 _24. The vertex 13 ₂₃ is the position of the coordinates (x ₅ , z ₅ ) moved to the left on the line 16 _{2 by} (x ₀ −x ₁ ) from the intersection point P ₂ in the drawing view. The vertex 13 ₂₄ is the position of coordinates (x ₆ , z ₆ ) moved to the left on the line 16 _{2 by} (x ₀ −x ₂ ) from the intersection P ₂ in the drawing view.

Thus, the vertices 13 ₂₁ to vertex 13 ₂₄ calculated, in the xz coordinate system in one y direction position, a portion of the three-dimensional object 13 ₂ is formed. The three-dimensional object 13 ₂ is the three-dimensional object 13 after the angle of the three-dimensional object 13 ₁ is changed according to the position in the x direction from the optical axis O of the virtual camera 25.

  Therefore, the direction of the three-dimensional object 13 seen from the virtual camera 25 does not change abruptly depending on the position of the three-dimensional object 13, and the discontinuity of the direction of the three-dimensional object 13 imaged from the virtual camera 25 is effectively suppressed. Is possible.

For example, when calculating the coordinates (x ₃ , z ₃ ) of the vertex 13 ₂₁ , the following equations (1) and (2) can be used. The coordinates of the vertex 13 ₂₂ to the vertex 13 ₂₄ can also be calculated using the same calculation formula.
x ₃ = x ₀ − (z ₀ −z ₁ ) × sin {(x ₀ −x ₁ ) / (z ₀ −z ₁ )} (1)
z ₃ = z ₀ − (z ₀ −z ₁ ) × cos {(x ₀ −x ₁ ) / (z ₀ −z ₁ )} (2)

Further, when the three-dimensional object 13 ₁ is imaged from the virtual camera 25, the size of the three-dimensional object 13 ₁ imaged from the virtual camera 25 differs depending on the position of the three-dimensional object 13 ₁ in the x-axis direction. However, _every position on the line 16 ₁ has the same distance from the viewpoint position 26, and every position on the line 16 ₂ has the same distance from the viewpoint position 26. Therefore, the size of the three-dimensional object 13 ₂ captured from the virtual camera 25 is almost the same regardless of the position of the three-dimensional object 13 ₂ in the x-axis direction. Therefore, the uncomfortable feeling by the observer can be further reduced.

The line 16 ₁ has the intersection point P ₁ as a contact point with the line 15 _1, and the line 16 ₂ has the intersection point P ₂ as a contact point with the line 15 ₂ , but the positions of the lines 16 ₁ and 16 ₂ are the same. Not limited. For example, as shown in FIG. 14, the lines 16 ₁ and 16 ₂ may be shifted in the direction of the optical axis O.

  In the above description, the angle of the three-dimensional object 13 is changed by moving the position of the vertex forming the three-dimensional object 13, but the method of changing the angle of the three-dimensional object 13 is limited to this method. It is not a thing.

For example, as shown in FIG. 15, the three-dimensional object 13 ₁ is rotated by rotating the three-dimensional object 13 around the center of gravity position 17 in the xz coordinate at an angle corresponding to the position on the x-axis of the three-dimensional object 13 1. ₂ may be set. By doing in this way, the process which converts the angle of the three-dimensional object 13 can be performed more easily.

The rotation angle α with the center of gravity position 17 of the three-dimensional object 13 as the rotation center can be calculated by, for example, the following equation (3). The center of gravity position 17 of the three-dimensional object 13 is assumed to be coordinates (x ₇ , z ₇ ).
α = tan ⁻¹ {(x ₀ −x ₇ ) / (z ₀ −z ₇ )} (3)

In addition to rotating the three-dimensional object 13 ₁ around the center of gravity, the three-dimensional object 13 ₁ may be moved forward (z-axis direction) by a distance corresponding to the position on the x-axis of the three-dimensional object 13 _1. . By doing so, the size of the three-dimensional object 13 ₂ imaged from the virtual camera 25 can be made comparable regardless of the position of the three-dimensional object 13 from the virtual camera 25 in the x-axis direction.

Movement of the center of gravity position of the three-dimensional object 13 _1, for example, the following equation (4) can be calculated by (5). The center-of-gravity position 17 before the movement of the three-dimensional object 13 is defined as coordinates (x ₇ , z ₇ ), and the center-of-gravity position 17 after the movement of the three-dimensional object 13 is defined as coordinates (x ₈ , z ₈ ).
_{x 8 = x 0 - (z} 0 -z 7) × sin {(x 0 -x 7) / (z 0 -z 7)} ··· (4)
_{z 8 = z 0 - (z} 0 -z 7) × cos {(x 0 -x 7) / (z 0 -z 7)} ··· (5)

  As described above, in the image generation method according to the present embodiment, by changing the angle of the three-dimensional object 13 according to the position from the virtual camera 25, the three-dimensional object 13 is captured by one virtual camera 25. It is possible to effectively suppress the discontinuity of the direction of the captured three-dimensional object 13 when moving from one to another virtual camera imaging region.

  Therefore, the image to be generated does not need to be an image with an angle of view of 30 degrees or less, and may be an image with an angle of view of 60 degrees or an image with an angle of view of 90 degrees, for example. The cost of creating an image can be reduced.

  In the above description, in order to facilitate understanding, the example in which the three-dimensional object 13 moves along the x-axis direction without rotating is shown. However, when the three-dimensional object 13 moves while rotating, The same applies to the case of not moving along the x-axis direction.

  Further, in order to facilitate understanding, the shape of the three-dimensional object 13 has been described as a substantially cubic shape, but the angle of the three-dimensional object 13 described above can be used regardless of the shape of the three-dimensional object 13. The change method can be applied.

  In the above description, an example in which the three-dimensional object 13 is moved or rotated based on the vertex coordinates, the coordinates of the center of gravity, or the like has been described. However, the angle correction method for the three-dimensional object 13 is not limited thereto. For example, the three-dimensional object 13 may be moved or rotated based on a coordinate position set in advance in the three-dimensional object 13.

  Further, the method for moving and rotating the three-dimensional object 13 may be changed according to the size of the three-dimensional object. For example, when the three-dimensional object is smaller than a predetermined size, the three-dimensional object is rotated and / or moved based on the coordinates of the center of gravity. On the other hand, when the three-dimensional object is a predetermined size or larger, the three-dimensional object is rotated and / or moved by moving the vertex coordinates.

(Image of divided space)
As described above, after correcting the angle of the three-dimensional object existing in each of the divided spaces 3a to 3f, the virtual camera 25 for the right eye moves the three-dimensional object in each of the divided spaces 3a to 3f to a predetermined sampling time (for example, , Every 1/60 seconds). The imaging data includes coordinate data of a three-dimensional object viewed from the virtual camera 25, and the imaging data is rendered to generate right eye images for each of the divided spaces 3a to 3f.

  Similarly, a three-dimensional object in each of the divided spaces 4a to 4f divided to generate the image for the left eye is imaged by a virtual camera for the left eye, and this imaged data is rendered, and each divided space 4a is rendered. A left-eye image is generated every 4 f.

  As a result, the right eye image and the left eye image for each divided space are respectively generated by two virtual cameras having different parallax directions. The image for the right eye and the image for the left eye generated in this manner are overlapped by the image projection means and projected onto the screen as a projection image, so that the observer wearing the stereoscopic glasses can view the stereoscopic image. it can.

  In addition, when the three-dimensional object moves between the divided spaces, it is possible to suppress the orientation of the captured three-dimensional object from being discontinuous. Therefore, it is possible to provide a highly immersive image.

  Note that the virtual camera for the right eye and the virtual camera for the left eye have different viewpoint positions as described above. When the intersection method is employed, the optical axis direction of the right-eye virtual camera and the optical axis direction of the left-eye virtual camera are changed.

  Here, generation of an image by a known intersection method will be described. In the image generation by the intersection method, the three-dimensional virtual space 1 is divided into the same divided space for the right-eye image and the left-eye image, and the optical axis direction of the right-eye virtual camera and the left-eye virtual camera are divided. This is different from the image generation by the parallel method in that the direction of the optical axis is changed. Specifically, the three-dimensional virtual space 1 is divided into divided spaces 3a to 3f (see FIG. 9A). The divided spaces 3a to 3f are spaces that are divided to generate a right-eye image and a left-eye image.

Next, angle correction of the three-dimensional object is performed. FIG. 16 is a schematic diagram showing a positional relationship between the moving path of the three-dimensional object and the viewpoint of the virtual camera. When performing angle correction of a three-dimensional object, as shown in FIG. 16, a virtual camera 25a that captures an image for the right eye and a virtual camera 25b that captures an image for the left eye are set. Then, the angle of the three-dimensional object 13 in the divided space 3a, is changed according to the x-direction position from the center line Oa of the optical axis O ₂ of the optical axis O ₁ and the virtual camera 25b of the virtual camera 25a. The method for changing the angle of the three-dimensional object 13 is as described above. Similarly, the angle of the three-dimensional object is changed for the remaining divided spaces 3b to 3f. Thereafter, the virtual camera 25a and the virtual camera 25b capture images of the three-dimensional objects existing in the divided spaces 3a to 3f at predetermined sampling times. As a result, an image can be generated by the intersection method.

  In the above-described embodiment, the example in which the angle correction of the three-dimensional object is performed after the three-dimensional virtual space 1 is divided into the plurality of divided spaces 3a to 3f has been described, but the three-dimensional virtual space 1 is not divided. You may make it perform angle correction | amendment of a three-dimensional object. For example, assuming that the virtual camera 25 is arranged at the position shown in FIG. 17, the angle of the three-dimensional object is changed as described above according to the position of the virtual camera 25 in the x direction from the optical axis O. In this case, a virtual three-dimensional space in which the three-dimensional objects are arranged is formed, and the position of the three-dimensional object is set from the virtual camera 25 with a predetermined position (for example, the position shown in FIG. 17) as the viewpoint position with respect to the virtual three-dimensional space. Accordingly, the angle of the three-dimensional object is changed. Thereby, the cylindrical virtual three-dimensional space 1a in which the three-dimensional objects are arranged is formed. Then, the virtual three-dimensional space 1a is captured by the virtual camera 25 by a predetermined angle to generate an image. When an image is generated by the intersection method, the angle of the three-dimensional object is changed according to the position in the x direction from the center line Oa (see FIG. 16). Further, without changing the angle of the three-dimensional object, a cylindrical virtual three-dimensional space 1a in which the three-dimensional object is arranged is formed, and the virtual three-dimensional space 1a is imaged by the virtual camera 25 by a predetermined angle. May be generated.

  Hereinafter, an image projection apparatus that generates a right-eye image and a left-eye image by the above-described image generation method and projects the generated right-eye image and left-eye image on a screen will be specifically described with reference to the drawings. explain.

[2. Image projection device]
Hereinafter, the image projection apparatus according to the present embodiment will be specifically described with reference to the drawings. 18A is a schematic perspective view of the image projection apparatus according to the present embodiment, FIG. 18B is an explanatory diagram of the configuration within the handrail shown in FIG. 18A, and FIG. 19 is a schematic cross-sectional view of the image projection apparatus according to the present embodiment. 20 is a schematic longitudinal sectional view of the image projection apparatus according to this embodiment, and FIG. 21 is a block diagram of the image projection apparatus according to this embodiment.

  As shown in FIG. 18A, the image projection apparatus 51 according to the present embodiment includes a frame 52, a screen 53, image projection units 54a to 54f, an observation table 55, a management apparatus 56, and a ceiling screen 58. doing.

  The frame body 52 is configured by assembling a plurality of frame members into a substantially hexagonal column shape. Specifically, the frame body 52 has a support column 52b erected at each apex portion of the hexagonal lower frame body 52a, and further connects the apex portion of the hexagonal upper frame body 52c to the upper end of each support column 52b. Formed. Further, the image projecting units 54a to 54f are supported on the respective vertex portions of the upper frame 52c. In the following, the image projection unit 54 means any one or all of the image projection units 54a to 54f.

  The screen 53 is formed in a cylindrical shape and is fixed by a plurality of locking members (not shown) protruding inward from the frame body 52. The screen 53 is arranged so that its inner peripheral surface becomes a screen surface and surrounds the observer 57 (see FIG. 20) located on the observation table 55.

  As shown in FIG. 19, each image projection unit 54 has an angle of view of 60 degrees in the circumferential direction, and projects an image of 60 degrees on a screen 53 of 360 degrees. Each image projection unit 54 includes a right-eye projection unit that projects a right-eye image and a left-eye projection unit that projects a left-eye image. And a parallax image in which the left-eye image is overlaid. As the right-eye projection means and the left-eye projection means, for example, a liquid crystal projector, a DMD (Digital Micromirror Device) projector, or the like is used.

  The projection direction centers of the image projection units 54b to 54f are 60 degrees, 120 degrees, 180 degrees, 240 degrees, and 300 degrees, respectively, in the circumferential direction of the screen 53 with respect to the projection direction center of the image projection means 54a. Are arranged so as to face the screen surfaces. By arranging the image projecting units 54 a to 54 f in this way, the parallax images projected by the image projecting units 54 a to 54 f are arranged adjacent to each other in the direction of the screen 53 and are formed on the screen surface of the cylindrical screen 53. Projected as a series of images.

  Here, the right-eye image and the left-eye image are parallax images formed with light having different polarization directions, and the observer 57 passes through stereoscopic vision glasses in which polarization filters having different polarization directions are arranged on the left and right. By looking at the parallax images, a series of stereoscopic images continuous in the circumferential direction of the screen 53 can be viewed. That is, in the image projector 51 according to the present embodiment, the viewer 57 is made to visually recognize a three-dimensional image continuous 360 degrees in the horizontal direction by the polarization method.

  In place of the polarization method, a color filter method or a shutter method may be employed. The color filter method is a method using stereoscopic glasses in which a right-eye image and a left-eye image projected on a screen by an image projection unit are formed in different colors, and different color filters are arranged on the left and right. In the shutter system, the image for the right eye and the image for the left eye are alternately projected onto the screen at a fixed period by the image projecting means, and transmission through the liquid crystal for the right eye and the liquid crystal for the left eye is synchronized with the fixed period. This is a method of using stereoscopic glasses that alternately perform opaqueness.

  Further, the right eye image and the left eye image projected by each image projection unit 54 are described in [1. The image is generated by the image generation method described in the “Image generation method”, and is generated by imaging with a virtual camera having an imaging area of the screen 53 for a field angle of 60 degrees.

  Each image projection unit 54 projects a parallax image by two projection units, a right-eye projection unit and a left-eye projection unit, but the image projection unit is not limited to this. For example, each image projection unit 54 includes two liquid crystal display units for right eye and left eye, and one image projection unit that projects a parallax image by superimposing a right eye image and a left eye image. May be adopted.

  In addition, each image projecting unit 54 has a right-eye projecting unit and a left-eye projecting unit arranged one above the other, but the right-eye image and the left-eye image are projected on the same area of the screen 53. For example, they may be arranged side by side on the left and right.

  As shown in FIG. 21, the image projecting units 54 a to 54 f are connected to the management device 56 via a communication cable 48. The management device 56 includes a control unit 70, a storage unit 71, and an image data output unit 72.

  The storage unit 71 stores image data for generating a right-eye image and a left-eye image to be projected by each image projection unit 54, image data for generating a ceiling image to be projected by the ceiling projection unit 61, and the like. doing.

  The image data output unit 72 has a plurality of image data output terminals (not shown) for outputting image data to the image projection units 54 a to 54 f and the ceiling projection unit 61.

  The control unit 70 controls the entire management device 56. For example, the control unit 70 inputs the image data stored in the storage unit 71 to the image data output unit 72 so that the input image data is converted into data of a predetermined format by the image data output unit 72, and the communication cable The image data output unit 72 outputs the image data to the image projecting units 54 a to 54 f and the ceiling projecting unit 61 via 48.

  As described above, the management device 56 outputs the image data stored in the storage unit 71 to the image projecting units 54a to 54f via the communication cable 48, so that the image for the right eye is output from the image projecting units 54a to 54f. And a parallax image including the left-eye image is projected onto the screen 53.

  Further, the management device 56 outputs the image data stored in the storage unit 71 to the ceiling projection unit 61 via the communication cable 48, so that the image projection unit 54 synchronizes with the projection operation of the image projection unit 54. A two-dimensional image corresponding to the content of the image projected by 54 is projected from the ceiling projection means 61 onto the ceiling screen 58 as the second screen. The ceiling screen 58 is disposed above the cylindrical screen 53, and the observer 57 is surrounded by the ceiling screen 58 and the screen 53.

  Thus, since the two-dimensional image that is not the parallax image is projected onto the ceiling screen 58, the ceiling image can be produced at low cost. In addition, since the image is projected onto the ceiling screen 58, the sense of reality can be improved as compared with a conventional image projection apparatus that does not project an image onto the ceiling.

  Furthermore, as shown in FIGS. 18A and 21, the image projection apparatus 51 according to the present embodiment includes an artificial snow generator 62, a soap bubble generator 63, a nozzle 64, a compressor 65, a body sonic speaker 66, The amplifier 67 has a snowfall function, a soap bubble output function, a body vibration function, an air blowing function, and the like.

  As shown in FIG. 21, the storage unit 71 stores acoustic data and effect data. The control unit 70 reads the effect data and the sound data stored in the storage unit 71, controls the artificial snow generator 62, the soap bubble generator 63, the compressor 65, and the amplifier 67, and image projection means. In synchronization with the projection operation 54, snow, soap bubbles, air (wind), and vibration are generated. That is, snow, soap bubbles, air (wind), and vibration are generated in accordance with the content of the image projected by the image projecting unit 54 to stimulate the viewer's 57 visual and tactile senses. I try to deepen my sense of immersion in images.

  The artificial snow generator 62 is a device that generates artificial snow, is disposed on the upper frame 52c (see FIG. 18A), and causes snow to fall around the observation table 55. The control unit 70 reads out the effect data stored in the storage unit 71 and outputs it to the artificial snow generator 62, thereby generating artificial snow from the artificial snow generator 62. The artificial snow generator 62 can also cause the artificial snow to fall so as to reach the observation table 55 according to the effect data output from the control unit 70, and the snowfall amount can also be controlled. .

  The soap bubble generator 63 is a device that generates soap bubbles, and is disposed on the upper frame 52c (see FIG. 18A), and generates soap bubbles around the observation table 55. The control unit 70 reads out the effect data stored in the storage unit 71 and outputs it to the soap bubble generator 63, thereby generating soap bubbles from the soap bubble generator 63. The soap bubble generator 63 can generate soap bubbles so as to reach the observation table 55 according to the effect data output from the control unit 70, and the amount of soap bubbles generated can be controlled. It has become.

  In this way, it is possible to further improve the sense of realism by producing not only images but also specific objects such as snow and soap bubbles.

  As shown in FIG. 18B, the nozzle 64 is a handrail for the observation table 55 in order to blow air that flows in from the compressor 65 through the air pipe 68 to the observer 57 in the observation table 55. 69. FIG. 18B is an enlarged view of the region 90 shown in FIG. 18A.

  As shown in FIG. 18A, a plurality of body sonic speakers 66 are provided in the floor of the observation table 55, and vibrate based on an acoustic signal from the amplifier 67. The control unit 70 reads out the acoustic data stored in the storage unit 71 and outputs the acoustic data to the amplifier 67, so that the acoustic signal from the amplifier 67 is output to the body sonic speaker 66.

  Thus, not only visual stimuli such as images and snow but also tactile stimuli by air (wind) and vibration are given to the observer 57, so that the sense of reality can be further improved.

  In the image projection apparatus 51 described above, the angle of view of each image projection unit 54 is 60 degrees, but the angle of view of each image projection unit 54 is not limited to this. Such an angle of view may be used. For example, the angle of view of each image projection unit 54 may be 40 degrees. In this case, the number of the image projecting means 54 is nine, and the image projected by each image projecting means 54 is an image for an angle of view of 40 degrees.

  Further, the image for the right eye and the image for the left eye projected by the image projecting unit 54 described above are generated by capturing with a virtual camera capable of capturing an image corresponding to the angle of view of the image projecting unit 54. However, the right-eye image and the left-eye image may be generated by a virtual camera that can capture an area larger than the angle of view of the image projection unit 54.

  For example, by preparing a virtual camera having an imaging area for a field angle of 360 degrees on the screen 53 and dividing the image captured by this virtual camera into six images, the image for the right eye projected by each image projecting means 54 and An image for the left eye can be generated. In this case, since it is not necessary to divide the virtual three-dimensional space into divided regions, the image generation process can be simplified.

[3. Image generation program]
Next, the image generation program according to the present embodiment will be specifically described with reference to FIG.

  When the processing of the management device 56 shown in FIG. 21 is executed by a program, for example, an information processing device (computer) as shown in FIG. 22 is used. In addition to the processing of the management device 56 shown in FIG. 21, the information processing device shown in FIG. 22 further performs image generation processing and processing on a three-dimensional object. That is, in the information processing apparatus shown in FIG. 22, the image projected by the image projecting unit 54 is the above described [1. Processing such as setting, movement, erasure, and enlargement of a three-dimensional object is performed in accordance with processing generated by the image generation method described in “Image generation method” and operations performed by an observer 57 on an operation device described later.

  22 includes a CPU (Central Processing Unit) 81, a memory 82, an output device 83, an input device 84, an external storage device 85, and a portable recording medium drive 86. Are connected to each other via a bus 88.

  The memory 82 includes, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and stores programs and data used for processing. The program stored in the memory 82 is a program that controls the entire information processing apparatus 80 including the image generation program. The CPU 81 performs a process similar to that of the management device 56 by executing a program using the memory 82.

  The output device 83 is connected to and controls the image projection means 54a to 54f, the ceiling projection means 61, the artificial snow generator 62, the soap bubble generator 63, the compressor 65, and the amplifier 67.

  For example, a game pad, an infrared detector, or the like is connected to the input device 84 and is used for inputting instructions and information from the observer 57. A large number of infrared detectors are arranged on the ceiling screen 58, and infrared rays emitted from an infrared ray gun operated by an observer 57 are detected by the infrared detectors. The input device 84 detects the position of the infrared ray emitted by the infrared ray gun based on the detection result by the infrared detector.

  Based on the information from the input device 84, the CPU 81 performs processing such as setting, moving, erasing, and enlarging a three-dimensional object in the three-dimensional virtual space. Therefore, since the observer 57 can dynamically change the three-dimensional object by operating an operation device such as a game pad or an infrared ray gun, the observer 57 can further improve the sense of immersion in the image. be able to.

  Further, the CPU 81 changes the angle of the three-dimensional object according to the set position of the three-dimensional object from the virtual camera. Thereafter, the CPU 81 generates image data of the right eye image and the left eye image by the above-described image generation method based on the image generation program.

  Specifically, the CPU 81 changes the angle of the three-dimensional object for each divided space and then captures an image with the virtual camera. The CPU 81 performs rendering based on the data of the three-dimensional object imaged by the virtual camera (for example, the coordinate position of the three-dimensional object viewed from the virtual camera), thereby dividing the right-eye image and the left-eye image into the divided space. Each time it is generated and output to the output device 83. As described above, the CPU 81 generates the image data of the right eye image and the left eye image, and the image data is output from the output device 83 to the image projecting units 54a to 54f.

  Note that a device other than the information processing device 80 may be provided with a rendering function for generating a right-eye image and a left-eye image from data of a three-dimensional object captured by a virtual camera. In this case, for example, data of a three-dimensional object imaged by the virtual camera is output from the output device 83 to an external computer (not shown). Then, a rendering process based on the data of the three-dimensional object captured by the virtual camera by an external computer is performed to generate a right eye image and a left eye image.

  The external storage device 85 is, for example, a magnetic disk device, an optical disk device, a magneto-optical disk device, a tape device, or the like. The information processing device 80 stores programs and data in the external storage device 85 and loads them into the memory 82 for use as needed.

  The portable recording medium drive 86 accesses the recorded contents of the portable recording medium 87. The portable recording medium 87 is an arbitrary computer-readable recording medium such as a memory card, a flexible disk, an optical disk, or a magneto-optical disk. The operator stores programs and data in the portable recording medium 87 and loads them into the memory 82 for use as necessary.

  In the above description, the stereoscopic image is visually recognized by the observer 57 using the stereoscopic glasses. However, the right-eye image is displayed by allowing the observer 57 to visually recognize the stereoscopic image without using the stereoscopic glasses. And the image for the left eye may be displayed on a display unit for image formation.

  Further effects and modifications can be easily derived by those skilled in the art. Thus, the broader aspects of the present invention are not limited to the specific details and representative examples shown and described above. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

1 3D virtual space 3a-3f, 4a-4f Divided space ₁₀ , 13, 13 ₁ , 13 ₂ 3D object 20, 20 ₁ , 20 ₂ , 25, 25 ₁ , 25 ₂ Virtual camera 21 ₁ , 21 ₂ , 26 Viewpoint positions 22, 22 ₁ , 22 ₂ Imaging region 51 Image projection device 53 Screen 54 (54a to 54f) Image projection means 58 Ceiling screen (second screen)
61 Ceiling projection means (second image projection means)
Optical axis of O, O ₁ , O ₂ virtual camera

An image generation method according to an aspect of an embodiment is a method for generating an image to be projected onto a 360-degree screen by a virtual camera including a left-eye virtual camera and a right-eye virtual camera , and moves in a virtual three-dimensional space. A virtual camera including a left-eye virtual camera and a right-eye virtual camera having different viewpoint positions in the virtual three-dimensional space, and a position in the front-rear direction from the virtual camera is set. the lateral direction of the coordinates on the same coordinates modify each coordinate distance from the virtual camera constituting the three-dimensional object to be constant, three-dimensional object the virtual camera changes the position of the coordinates An image is generated by imaging.

An image generation method according to an aspect of an embodiment is a method in which a computer generates an image to be projected onto a 360-degree screen by a virtual camera including a left-eye virtual camera and a right-eye virtual camera, the virtual three-dimensional space A three-dimensional object that moves inside is set, a virtual camera including a left-eye virtual camera and a right-eye virtual camera having different viewpoint positions is set in the virtual three-dimensional space, and the front-rear direction from the virtual camera The coordinates of the three-dimensional object are changed so that the distance from the virtual camera is constant in the left-right coordinate where the positions of the three-dimensional objects are on the same coordinate, and the three-dimensional object in which the position of the coordinates is changed is An image is generated by imaging with a virtual camera.

Claims (11)

Set a 3D object to move in the virtual 3D space,
Setting a virtual camera having a predetermined position in the virtual three-dimensional space as a viewpoint position;
According to the position of the three-dimensional object from the virtual camera, the angle of the three-dimensional object is changed,
An image generation method for generating an image by capturing an image of the three-dimensional object whose angle has been changed by the virtual camera.   The image generation method according to claim 1, wherein changing the angle of the three-dimensional object includes a process of moving the three-dimensional object forward of the virtual camera in accordance with a position of the three-dimensional object. Forming a divided space obtained by dividing the virtual three-dimensional space;
The image generation method according to claim 1, wherein the setting of the virtual camera is performed for each of the divided spaces. The divided space is formed by forming a plurality of first divided spaces obtained by dividing the virtual three-dimensional space according to the first virtual camera, and providing a second virtual camera having a viewpoint position different from that of the first virtual camera. Accordingly, forming a plurality of second divided spaces obtained by dividing the virtual three-dimensional space,
The setting of the virtual camera includes setting the first virtual camera in each of the first divided spaces and setting the second virtual camera in each of the second divided spaces. The image generation method as described.   The image generation method according to claim 1, wherein a plurality of the three-dimensional objects are arranged in the virtual three-dimensional space. Forming a virtual three-dimensional space,
Setting a three-dimensional object moving in the virtual three-dimensional space;
The virtual three-dimensional space is imaged by the virtual camera at a predetermined angle to generate an image,
The image generation method, wherein the virtual three-dimensional space is a cylindrical virtual three-dimensional space.   A virtual camera having a predetermined position in the virtual three-dimensional space as a viewpoint position is set between the setting of the three-dimensional object and the imaging of the virtual camera, and according to the position of the three-dimensional object from the virtual camera The image generation method according to claim 6, wherein an angle of the three-dimensional object is changed. On the computer,
Set a 3D object to move in the virtual 3D space,
Setting a virtual camera having a predetermined position in the virtual three-dimensional space as a viewpoint position;
According to the position of the three-dimensional object from the virtual camera, the angle of the three-dimensional object is changed,
An image generation program for executing processing for generating an image by imaging the three-dimensional object with the changed angle by the virtual camera. A screen formed in a cylindrical shape and having an inner peripheral surface as a screen surface;
A plurality of image projecting means provided to face each of the screen surfaces and projecting images arranged in a circumferential direction on the screen surface;
The image projected by the image projection means is obtained by changing the angle of the three-dimensional object moving in the virtual three-dimensional space according to the position of the three-dimensional object from the virtual camera, and then changing the angle. An image projection apparatus, which is an image generated by capturing an object with the virtual camera. A second screen disposed above the cylindrical screen;
The image projection apparatus according to claim 9, further comprising: a second image projection unit that projects an image on the second screen in synchronization with a projection operation of the image projection unit.   The image projection apparatus according to claim 9 or 10, comprising an artificial snow generator and / or a soap bubble generator that operates in synchronization with a projection operation of the image projection means.

Images