JPS6328307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-dimensional image generating device suitable for use in a display device that projects stereoscopic images.

Holograms are a means of observing works of art from a free angle, as if they were actually there.
There are various types of holograms such as lip type, integral hologram, color hologram, and multiplex hologram. However, any of the above holograms requires time and effort to create, for example, in the case of a 360° integrated hologram, it takes about a day. Therefore, viewing works of art using holograms is expensive, and the quality of reproductions deteriorates, so it is currently far from being able to be distributed to individuals.

Furthermore, in the conventional preservation of three-dimensional images (stereoscopic images), the object to be preserved is stored as two pictures or photographs with binocular parallax. To view a three-dimensional image, the method was to take out the two pictures or photographs and put them in a stereoscopic mirror, which is very time-consuming and not widely used.

The present invention was invented to correct the above-mentioned defects, and relates to a three-dimensional image generating device capable of displaying a moving three-dimensional image to a large number of people.

Next, the first embodiment of the three-dimensional image generating device of the present invention
The basic configuration will be explained with reference to FIG.

First, the device for generating this three-dimensional image includes at least two left and right television cameras, which are photographing means capable of photographing the three-dimensional image appearing as a hologram, as at least left and right parallax images, and an apparatus that generates images from the television cameras. The apparatus is comprised of a transmission means for transmitting a video signal transmitted electronically, and one or more display devices serving as a display means for independently displaying the parallax image based on the transmitted video signal. The viewer is then able to observe a three-dimensional image using each display device based on the electronically transmitted video signal.

By the way, the two television cameras 5 and 6 are arranged parallel to each other on the left and right in front of the hologram 2 arranged at the photographing position. Note that a large number of holograms 2 are stored in the hologram tray 1, and one of them is selectively taken out to the above-mentioned photographing position, either manually or automatically.

On the other hand, the display device is provided with two picture tubes 7 and 8 and lenses 10 and 11 arranged in front of the picture tubes 7 and 8.

First, a three-dimensional image 3 projected on the hologram 2 by, for example, a laser beam is photographed as left and right parallax images by two television cameras 5 and 6. Next, the video signals obtained from the two television cameras 5 and 6 are transmitted to each display device by a transmission means to be described later, and displayed as independent parallax images on the two picture tubes 7 and 8. By observing the parallax images projected on the two picture tubes 7 and 8 through the lenses 10 and 11, the observer M can observe a three-dimensional image (stereoscopic image) 9 as shown by the virtual line. It is possible. Note that the lenses 10 and 11 may be removed so that the picture tubes 7 and 8 can be directly viewed.

By the way, regarding the three-dimensional image 3, it is possible to observe and photograph each side such as the top, bottom, left, right, front and back. There, two television cameras 5 and 6
By moving in the directions shown by arrows X and Y in FIG. 1, video signals corresponding to each of the above-mentioned sides can be obtained. As a result, the observer M can observe three-dimensional images of various sides using the picture tubes 7 and 8, similar to the three-dimensional image 9 described above.

If you want to shoot in color, use Hologram 2.
The color tone of the observed three-dimensional image 9 can be adjusted by adjusting the angle in a predetermined direction or by adjusting the angle of the two television cameras 5 and 6 in a predetermined direction with respect to the axis perpendicular to the hologram 2. can be changed to a predetermined state.

Note that the video signals obtained from each of the television cameras 5 and 6 can be simultaneously transmitted to a plurality of display devices by various transmission methods. The first
In this method, the video is recorded on a VTR or the like, played back, and displayed as a stereoscopic image on a display device. The second method is to transmit by radio waves, and the third method is to transmit by wire.

Regardless of the above-mentioned transmission method, the shooting angle of each television camera 5, 6 is adjusted in accordance with an audio signal recorded on a magnetic tape, for example, a video commentary, or in accordance with an angle information signal or a position information signal. It is possible to change the photographing position and change the position of the reproduction stereoscopic image display means according to the angle and position of the television camera.

Furthermore, according to the first basic configuration described above, the video signals obtained from each of the television cameras 5 and 6 can be simultaneously transmitted to a large number of display devices via radio waves or wires, so that a large number of observers can view stereoscopic images. They can be observed at the same time.

Next, the second basic configuration of the embodiment of the present invention will be explained with reference to FIG.

In this case, lenses 12 and 13 are placed in front of the picture tubes 7 and 8 in the first basic configuration, respectively, and a screen 14 such as a lenticular plate is placed in front of the lenses 12 and 13, respectively. Then, the parallax images projected on the picture tubes 7 and 8 are transferred to the lenses 12 and 1.
3, the image is enlarged and projected onto a screen 14 for observation. In this case, the screen 14 may include a combination of a lenticular plate and a Fresnel lens to further clarify the observation of the parallax image.

Next, the third basic configuration of the embodiment of the present invention will be explained with reference to FIG.

The hologram 15 in this case is used for an integral hologram, and is formed, for example, in an arc shape with a central angle of 90° to 180°, and each frame of a moving image is a vertical stripe. It is recorded in the shape of an arc. In addition, two stereo television cameras 17 and 18 are arranged in front of the hologram 15 and are movable in the direction of the outer periphery of the hologram 15 (in the direction of the arrow). Then, each stereo television camera 17, 18
When moving in the direction of the arrow while photographing the video 5, continuously moving video signals can be obtained from each stereo television camera 17, 18.

According to this method, the observer M can observe a moving three-dimensional image while staying in the room using, for example, each of the display devices described in the first and second basic configurations.

Next, an embodiment of a three-dimensional image generating apparatus to which the present invention is applied will be described with reference to FIGS. 4 and 5.

In this case, first, a cylindrical hologram 25 is used as shown in FIG. Note that this hologram 25 is a cylindrical version of the hologram 15 in the third basic configuration. A plurality of stereo television cameras 27 serving as photographing means are installed at predetermined positions on the outer periphery of the hologram 25 so as to surround the hologram 25. The hologram 25 and the plurality of stereo television cameras 27 are relatively movable in the vertical direction and the circumferential direction. Further, the axis of the hologram 25 is configured to be adjustable in angle as necessary.

The display device shown in FIG. It is composed of a plurality of stereo projectors (composed of a combination of a picture tube and a lens) 21 arranged in an annular shape. Furthermore, a vertical or horizontal lenticular plate or Fresnel lens (none of which is shown) is provided on the outer periphery of the screen 19.

When photographing, a three-dimensional image projected on the outer peripheral surface of the hologram 25 is photographed by the stereo television camera 27. On this occasion,
The stereo television camera 27 is moved along the outer circumference of the hologram 25, or the stereo television camera 27 is fixed at a fixed position, and the hologram 25
By rotating around the axis, a continuously moving video signal is obtained as in the third basic configuration.

This video signal is electrically transmitted to the display device by the above-mentioned electrical transmission means. As the stereo television camera 27 or the hologram 25 rotates, a parallax image is projected from each projector 21 toward the slope of the reflecting mirror 20 as shown by the arrow, and is reflected from the reflecting mirror 20 onto the screen 19. Therefore, the observer M can observe a moving three-dimensional image without leaving the room.

In this case, a large number of viewers can observe a moving three-dimensional image around the entire circumference of the screen 19.

As described above, the present invention is provided with a plurality of photographing units arranged to surround a cylindrical hologram at a predetermined distance and configured to be able to photograph a three-dimensional image appearing in the cylindrical hologram from all around the cylindrical hologram. a first control means for controlling the angle and position of the photographing means; and an electric transmission for transmitting a video signal obtained from the photographing means and an information signal accompanying the angle and position control obtained from the first control means. means, an inverted conical reflecting mirror provided for displaying the three-dimensional image based on the electronically transmitted video signal and information signal, and a plurality of projectors provided in an annular shape around the axis of the reflecting mirror. and a display means comprising a screen provided at a predetermined distance around the reflecting mirror and the plurality of projectors, and a second control means for controlling the angle and position of the display means, The angle of the above-mentioned photographing means by means of electric transmission,
The three-dimensional image generating device is configured to transmit a position information signal and change the angle and position of the display means in response to changes in the photographing angle and position of the photographing means.

According to the three-dimensional image generating device of the present invention configured as described above, the three-dimensional image generated by the cylindrical hologram is electrically transmitted, and the three-dimensional image displayed by the display means is transmitted not only at a remote location but also at a plurality of locations. It is extremely economical because the original image can be observed simultaneously and an expensive hologram can be shared by multiple display means. Since the image can be displayed on the display means in a certain state, there is an effect that the observer can observe a moving three-dimensional image without leaving the room.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a first basic configuration of an embodiment of a three-dimensional image generating device of the present invention, and FIG. 2 is a schematic perspective view of a display device showing a second basic configuration of an embodiment of the present invention. , FIG. 3 is a schematic perspective view of a hologram photographing means showing the third basic configuration of an embodiment of the present invention, and FIGS. 4 and 5 show an embodiment of a three-dimensional image generating device to which the present invention is applied. and the fourth
The figure is a schematic perspective view showing the photographing means, and FIG. 5 is a schematic perspective view of the display device. In addition, in the symbols used in the drawings, 19... cylindrical screen, 20... reflecting mirror, 21...
Projector, 25... Cylindrical hologram, 27... Stereo television camera (photographing means).

Claims (1)

[Claims] 1. A plurality of photographing means arranged to surround a cylindrical hologram at a predetermined distance and configured to photograph a three-dimensional image appearing in the cylindrical hologram from all around; and the photographing means. a first control means for controlling the angle and position of the camera; a transmission means for electrically transmitting a video signal obtained from the photographing means and an information signal associated with the angle and position control obtained from the first control means; an inverted conical reflecting mirror provided for displaying the three-dimensional image based on the video signal and information signal; a plurality of projectors and the reflecting mirror provided in an annular shape around the axis of the reflecting mirror; Each of the plurality of projectors is provided with a display means consisting of a screen provided at a predetermined distance around the projectors, and a second control means for controlling the angle and position of the display means, A three-dimensional image generating device configured to transmit angle and position information signals of the photographing means and change the angle and position of the display means in accordance with changes in the photographing angle and photographing position of the photographing means.