JP2011150213A - Floating stereoscopic display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact apparatus which makes a photographed image be floated and erected and enables an observer to see front and back, and right and left shapes of the floated and erected image with naked eyes, and to directly touch them. <P>SOLUTION: The floating stereoscopic display system includes: a parabolic mirror which is provided with mirrors forming a paraboloid surface oppositely vertically, and has opening parts on the center parts of the respective mirrors; a flat plate-shaped screen which is arranged on the lower part of the parabolic mirror and is partially projected into the parabolic mirror from the lower parabolic mirror opening part; a cylindrical cylinder part which is circumferentially disposed so as to surround the screen and in which the opening part is partially formed; a rotation drum which rotates while coupling the screen to the cylinder part; a plurality of projectors arranged at a regular interval on the same circumference around the rotation shaft of the rotation drum; and a means including a computer which performs image distortion correction processing of the photographed image and simultaneous reproduction processing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention allows the displayed image to be viewed with the naked eye in a spatially floating state, allowing simultaneous observation from multiple directions, and viewing different aspects of the displayed image depending on the viewing direction, enabling stereoscopic viewing The present invention relates to a floating stereoscopic display system.

  Around the rotation axis of the screen, polygonal mirrors are arranged in a substantially ring shape, and above the polygonal mirror, four projectors are arranged on the same circle centering on the extension axis of the rotation axis, A technique is disclosed in which a projected image is emitted from a projector to a polygonal pyramid mirror, which is reflected by the polygonal mirror and projected onto a rotating screen, thereby forming a stereoscopic image in which different sides are seen when viewed from different directions. (For example, refer to Patent Document 1).

  A plurality of polygonal pyramid mirrors are arranged next to each other, a planar real image viewed from different directions of the same object is reflected on each of the mirrors, and a mirror image of the image by each of the polygonal mirrors is generated on the same axis. A technique relating to a stereoscopic image display device in which the position and orientation of the polygonal mirror with respect to the planar real image is set is disclosed (for example, see Patent Document 2).

  Creates dots that emit light into the space by emitting oxygen and nitrogen molecules in the air at the focal point of the laser light, and creates a 3D image animation by freely emitting light to any position in the space. Has been announced (for example, see Non-Patent Document 1).

JP 2006-10852 A JP 2008-224748 A

National Institute of Advanced Industrial Science and Technology press release “Succeeded in high-performance experiments on spatial 3D display technology” announced on July 10, 2007

  Since the technique of Patent Document 1 is a large stationary apparatus that can be observed from the entire circumference, it is moved to a place where the apparatus is used, for example, for lectures in education or examination of surgical methods in medical settings. In such a case, there is a problem that it cannot be used easily, and since it is projected on a rotating screen inside the apparatus, it is impossible to bring a hand close to the image (see, for example, Patent Document 1).

  The technique of Patent Document 2 is miniaturized and can be observed from all around, but the observer sees a virtual image through the inverted polygonal mirror, the line of sight is facing upward, and the image cannot be directly seen, Since the polygonal mirror is interposed on the line of sight, there is a problem that a feeling of isolation occurs and the image cannot be touched (see, for example, Patent Document 2).

  The technique of Non-Patent Document 1 has a problem that the apparatus is large and lacks in mobility, cannot be observed close because of display in a remote space, and it is difficult to create a high-definition image because it is expressed by dots (dots). (For example, refer nonpatent literature 1).

  Therefore, an object of the present invention is to secure a state where a color display image is standing and floating in the air near the observer, and looking around the entire 360 ° circumference of the floating standing image It is to provide a small device that can be seen with the naked eye.

  When the inventor places a stationary object on the center of the bottom surface inside the parabolic mirror, a floating stereoscopic image of the object is formed at the upper opening of the parabolic mirror. If this is possible, the present invention has been developed with the idea that floating stereoscopic display such as moving images can be displayed in the upper opening of the parabolic mirror.

  In the present invention, “parabolic mirror” means a combination of upper and lower mirrors having a paraboloid, and “upper paraboloid mirror” means the upper part of the parabolic mirror in the present invention. The “lower parabolic mirror” means the lower part of the parabolic mirror in the present invention.

  In the present invention, the “opening surface” means a flat surface formed by the opening.

  In order to solve the above-mentioned problems, the invention of the floating stereoscopic display system according to claim 1 includes a parabolic mirror having a paraboloid forming a pair of upper and lower mirrors and having an opening at each center. A flat screen that is suspended from the lower part of the parabolic mirror and partially protrudes into the parabolic mirror from the opening of the lower parabolic mirror, and does not protrude into the parabolic mirror of the screen. A cylindrical cylindrical portion that is provided so as to surround the portion and has an opening formed in a part thereof, and is disposed below the parabolic mirror, on an extension line of the central axis of the parabolic mirror opening. A rotating drum having a rotating shaft and rotating by connecting the screen and the cylindrical portion; a plurality of projectors arranged at equal intervals on the same circumference around the rotating shaft of the rotating drum; and a plurality of projectors A computer that inputs a photographed image and performs image distortion correction processing and simultaneous reproduction processing of the photographed image. Characterized in that it comprises means including a coater, a.

  According to a second aspect of the present invention, there is provided a floating stereoscopic display device system according to the first aspect of the present invention, wherein the opening formed in the cylindrical portion has two quadrangular shapes provided at symmetrical positions about the rotation axis of the rotating drum. And an opening width of the opening is adjustable.

  According to a third aspect of the present invention, there is provided a floating stereoscopic display device system according to the first or second aspect, wherein the plane of the flat screen is disposed in a positional relationship parallel to the opening surface of the cylindrical portion. Both front and back surfaces are reflective surfaces.

  According to a fourth aspect of the present invention, there is provided a floating stereoscopic display device system according to any one of the first to third aspects, wherein an upper end of a portion in which the upper ends of images from a plurality of projectors are projected into a parabolic mirror of the screen. The plurality of projectors are installed obliquely upward at the same angle so as to be projected in the vicinity.

  The invention of a floating stereoscopic display device system according to claim 5 is the image distortion according to any one of claims 1 to 4, wherein the image is projected from the computer to the same scale from the upper end to the lower end of the image projected on the reflective surface of the screen. A correction processing program is incorporated.

  The invention of the floating stereoscopic display device system according to claim 6 is the invention according to any one of claims 1 to 5, wherein W is a distance from the lens center position of the projector to the upper end of the image on the screen, and R is the projector. Assuming the distance from the center position of the lens to the lower end of the image on the screen, a procedure for inputting and storing the W value and the R value, a procedure for capturing a captured image and storing it as an original image, a procedure for calculating R / W as a reduction ratio, and storage The horizontal dimension of the bottom edge of the original image is obtained, and the horizontal dimension of the bottom edge of the original picture is used as a reference, and the horizontal dimension of the top edge of the original picture is reduced to the horizontal dimension obtained by multiplying the horizontal dimension of the bottom edge of the original picture by the reduction ratio of R / W. An image distortion correction processing program for executing a procedure for creating a trapezoidal original image by gradually changing the scale of the original image between the upper end and the non-reduced lower end is incorporated.

  According to a seventh aspect of the present invention, there is provided a floating stereoscopic display device system according to any one of the first to sixth aspects, wherein the computer stores a sequence of images obtained by photographing the same subject from a plurality of at least four different directions. A simultaneous reproduction program for executing a procedure for simultaneously reproducing at least four videos is incorporated.

  According to the first aspect of the present invention, an image can be formed in a space in the vicinity of the observer, and when the floating standing image is viewed around the periphery, the front, rear, left and right images of the standing image are directly displayed. The effect is that it can be seen with the naked eye and the hand can be touched.

  In addition, there is an effect that it is possible to form an image by floating a real color image captured by a still camera or a video camera or a multi-directional color image generated by computer graphics in space.

  Since the apparatus is miniaturized, the floating standing image can be seen at a place where it can be easily moved and used.

  The invention of claim 2 has the same effect as that of claim 1. Furthermore, since the opening installed in the cylindrical portion limits the optical path from the projector by the opening width while the cylindrical portion rotates, the effect that the image projected on one screen can always maintain the clearness. Play.

  The invention of claim 3 has the same effect as the invention of claim 1 or 2. In addition, since the images projected from the projector are reflected by the reflection plates on the front and back surfaces, it is possible to reflect the images from the two projectors at the same time.

  The invention of claim 4 has the same effect as any of the inventions of claims 1 to 3. Further, the floating standing image is formed at a high position.

  The invention of claim 5 has the same effect as any of the inventions of claims 1 to 4. Furthermore, there is an effect that the scale can be made the same in the vertical direction of the floating stereoscopic image.

  The invention of claim 6 has the same effects as any of the inventions of claims 1 to 5.

  The invention of claim 7 has the same effect as any of the inventions of claims 1 to 4. Furthermore, since images obtained by capturing the same subject with a plurality of cameras can be simultaneously reproduced, a floating standing image can be visually recognized as a standing image of the same subject.

It is a principle explanatory view of a general parabolic mirror. It is an outline explanatory view of the floating stereoscopic display device system of the present invention. It is a schematic diagram of the outline of a parabolic mirror, (a) is a general parabolic mirror, (b) is the parabolic mirror of this invention. 1 is a block diagram of a floating stereoscopic display device system of Example 1. FIG. It is a perspective view of a rotating drum. It is a longitudinal cross-sectional view in the rotating shaft of a rotating drum. It is the outline outline figure projected on the screen. It is a projection angle related figure from a projector to a screen.

    Hereinafter, embodiments and functions of the present invention will be described.

  First, the principle of the floating stereoscopic display device according to the present invention will be described with reference to FIG.

  The general parabolic mirror 1 has a property of collecting light at one point when parallel light is incident thereon. As shown in FIG. 1, when a stationary object 2 is placed in a parabolic mirror 1, an image of the stationary object 2 forms an image 3 that is repeatedly reflected and condensed in the parabolic mirror 1 by incident external light.

  The vertical direction of the stationary object 2 placed in the parabolic mirror 1 is the same as the vertical direction of the floating imaging 3. Further, when the image 3 is viewed from an oblique direction from the observer's viewpoint 4, the image 3 can be viewed from the entire circumference of the paraboloidal mirror 1 in a floating state. Can do.

  The floating stereoscopic display device system incorporating the parabolic mirror 10 of the present invention is an invention incorporating the principle of a general parabolic mirror 1, and instead of a real object called a stationary object 2, an object or a human subject. By using a virtual image that is a still image or a video image that captures the image, the subject can be stereoscopically viewed. Embodiments of the present invention will be described below.

  As shown in FIG. 2 or 4, the floating stereoscopic display device system includes a rotating drum 5 including a parabolic mirror 10, a cylindrical portion 11, and a screen 13, and at least a front surface, a back surface, a right side surface, and a left side. The projector includes four projectors 35, 36, 37 and 36 for the surface and the computer 7.

  Further, in the case where the photographed image is made to be a floating standing image as a preparation, at least four cameras 31, 32, 33, and 34 that shoot the subject from the front, back, right side, and left side are used. In addition, in the case where an image created by computer graphics is used as a floating standing image as a preparation, at least the images of the front, back, right side, and left side are drawn by computer graphics.

  As shown in FIG. 3 (a), a general parabolic mirror 1 has an upper opening 25 and a closed bottom surface without an opening in the lower central portion. As shown in FIG. 3B, the parabolic mirror 10 is provided with an upper opening 25 in the upper parabolic mirror 23 and a lower opening 26 in the lower parabolic mirror 24.

  5 or 6, the rotating drum 5 includes a rotating shaft 15 that is rotated by a motor 16 at the center of the rotating drum 5, a flat screen 13 that is attached to the rotating shaft 15, and a cylinder that is coupled to the rotating shaft 15. The unit 11 and the motor 16 are included.

  The screen 13 is attached to the rotary shaft 15 perpendicularly, is coated in black, and has a flat plate shape having reflection surfaces on both front and back surfaces.

  The width of the screen 13 in the horizontal direction is smaller than the diameter of the lower opening 26 for the portion inserted into the parabolic mirror 10 from the lower opening 26 of the lower parabolic mirror 24, and the paraboloid The portion not inserted into the mirror 10 has a width smaller than the inner diameter of the cylindrical portion 11.

  The height of the upper end of the screen 13 is set lower than the height of the boundary between the upper parabolic mirror 23 and the lower parabolic mirror 24 and close to the height of the boundary as much as possible. Here, as the height of the upper end of the screen 13 is closer to the height of the boundary between the upper parabolic mirror 23 and the lower parabolic mirror 24, a floating stereoscopic image can be formed at a higher position from the upper opening 22. This is because, if the height is higher than the boundary between the upper parabolic mirror 23 and the lower parabolic mirror 24, an image is not formed for a portion higher than that height.

  The height of the lower end of the screen 13 is set lower than the lower end of the image projected from the projector 6.

  As shown in FIG. 5 or FIG. 6, the cylindrical portion 11 is a cylindrical tube. The peripheral wall is provided with two openings 12 at symmetrical positions around the rotation shaft 15, and the opening surface of the opening 12 is provided. Is in a positional relationship parallel to the surface of the screen 13 and is connected to the rotary shaft 15 in the lower part.

  The opening 12 of the cylindrical portion 11 can be changed in width by a slide structure or the like, and the opening 12 prevents an image projected on one surface of the screen 13 from being blurred by projection from the plurality of projectors 6. Adjust the width dimension.

  Since the rotating shaft 15 connected to the cylindrical portion 11 is connected to the motor 16, the cylindrical portion 11 and the screen 13 rotate integrally by driving the motor 16.

  As shown in FIG. 6, on the outer wall in the vicinity of the upper portion of the cylindrical portion 11, three side-contact preventing rollers 17 that are evenly arranged on the circumference with the rotary shaft 16 as the central axis are arranged in a circumscribed state. Has been. Thereby, the rolling of the cylindrical part 11 at the time of rotation can be suppressed, and there exists an effect which prevents the shaking of an image | video.

  The driving method for rotating the cylindrical portion 11 is a method in which the rotating shaft 15 is rotated by the motor 16 at the lower portion of the cylindrical portion 11 or a driving roller that is rotated by the motor is circumscribed at the upper portion of the outer periphery of the cylindrical portion 11. The driving method is not limited.

  As shown in FIG. 2, the light emitted from the projector 6 toward the rotary drum 5 like the optical path 8 passes through the opening 12 of the cylindrical portion 11 that restricts the passage, and the light that has passed through the screen 6 The light is reflected by 13 and enters the parabolic mirror 10.

  The optical path 8 from the projector 6 to the rotating drum 5 will be described. Lights of different images are emitted from the four projectors 35, 36, 37, and 38 for the front, back, right side, and left side, respectively, toward the cylindrical portion 11 of the rotating drum 5, and the light from these four directions The two openings 12 installed in the rotating drum 5 are always limited to allow only light incident from the two directions of the front and back, or the right and left sides to pass through instantaneously while rotating.

  Therefore, by rotating the opening 12 of the cylindrical portion 11, the light from the projector 6 that is always projected from the front, back, right side, and left side directions is instantaneously reflected from the front and back directions. And the light from the right side surface and the left side surface are alternately incident on the screen 13.

  The number of rotations of the rotary drum 5 is determined so that one frame is projected onto the screen based on the frame feed speed projected from the projector 6 and the number of reflection surfaces of the screen 13.

  First, the video feed rate will be described. The video feed rate capable of smoothly projecting the movement of a person or the like is 20 to 30 frames / second, which is substantially the same as the video feed rate of television. Based on this, the video feed rate from the projector is set to 30 frames / second.

  Since two frames can be reflected at the same time by the screen 13 having the double-sided reflection surface by one rotation of the rotary drum 5, the rotation speed of the rotary drum is 2 frames, the frame feed rate being 30 frames / second. Divide by to find.

  The light of the image projected from the projector 6 that has passed through the opening 12 of the cylindrical portion is reflected into the parabolic mirror 10 by the screen 13 installed vertically at the same reflection angle as the incident angle from the projector 6. The image formed by repeatedly reflecting and converging in the parabolic mirror 10 becomes the floating image 9 in the upper opening 25 of the parabolic mirror 10. The floating image 9 can be seen from the direction of the viewpoint 4 of the observer, and the vertical direction of the image 14 on the screen is the same as the vertical direction of the floating image 9 appearing at the upper opening of the parabolic mirror 10.

  Next, the projector 6 will be described. The projector 6 preferably has a short focal point in order to reduce the size of the apparatus, and since the luminance is proportional to the brightness of the floating image 9, the projector 6 is selected so as to have the brightness of the floating image 9 to be obtained.

  The projector 6 is composed of at least four projectors 35, 36, 37, and 38 on the front, back, right side, and left side, and is arranged at equal intervals on the same circumference around the rotation axis 15 of the rotary drum 5. Has been. At this time, the projectors 35, 36, 37 and 38 are installed at an upward angle with respect to the horizontal so that they can be projected above the screen 13.

  This is because the image is projected to a higher position from the upper opening 25 of the upper parabolic mirror 23 and floats as it is projected to a position closer to the center of the parabolic mirror 10, but an excessive angle When the button is turned on, the focal difference between the upper and lower portions of the image 14 on the screen is enlarged, so that the clarity of the image is lost.

  The distance between the plurality of projectors 6 and the screen 13 is such that the position and size of the image to be formed is the position and size of the image projected on the screen 13 inserted from the lower opening 26 of the lower parabolic mirror 24. Since it is proportional, the distance between the plurality of projectors 6 and the screen 13 is determined in consideration of the requirement that the image should be as large as possible, but that the image in the range desired to be floated on the screen is displayed more clearly.

  Since the projector 6 is installed at an upward angle α with respect to the horizontal as shown in FIG. 8, when the original image 20 is projected onto the screen 13 as shown in FIG. Therefore, the inverted trapezoidal distortion is corrected by the following calculation formula.

  In FIG. 8, A is a projector lens, X is a projectable range on the screen 13, W is a distance from the projector lens A to the upper end of the screen 13, L is a distance from the projector lens A to the center of the screen 13, and R is a projector lens A. Is the angle between the projector 6 and the screen 13, and β is the spread of the image from the center of the projector lens A.

  The distance of the perpendicular to the projector lens A and the screen 13 is expressed as L × COS (α).

  The relationship between the distance R from the projector lens A to the lower end of the screen 13 and the distance L × COS (α) of the perpendicular to the projector lens A and the screen 13 is expressed by the following formula (1) or (2).

  The relationship between the distance W from the projector lens A to the upper end of the screen 13 and the distance L × COS (α) of the perpendicular to the projector lens A and the screen 13 is expressed by the following formula (3) or (4).

  From the formulas (2) and (4), the ratio of W and R is represented by the following formula (5) or (6).

  Since the ratio of W and R is distortion, an image 22 after the scale adjustment as shown in FIG. 8 in which the original image is corrected with the value of R / W that is the reciprocal of W / R may be created.

  Next, the computer 7 will be described. The computer 7 stores an image processing procedure for correcting trapezoidal distortion and a simultaneous playback processing procedure for a plurality of videos.

  The image processing procedure for correcting the trapezoidal distortion includes inputting and storing the W value and R value in step 1, capturing the captured image in step 2 and storing it as an original image, calculating R / W as the reduction ratio in step 3, Obtain the horizontal dimension of the lower end of the original image stored in step 4 and reduce the horizontal dimension of the upper end of the original image to the horizontal dimension of the lower end of the original image multiplied by the R / W reduction ratio based on the horizontal dimension of the lower end of the original image. A program for executing creation of a trapezoidal original image by gradually changing the scale of the original image between the upper end reduced in step 5 and the lower end not reduced is incorporated in the computer.

  In the simultaneous reproduction procedure, images taken from the four cameras 31, 32, 33, and 34 for at least the front, back, right side, and left side in procedure 1 are stored in separate files in the computer. Here, as a preparation for the procedure 1, editing is performed so that the timings at the start of the files of the images captured by the four cameras 31, 32, 33, and 34 coincide with each other.

  A program for executing simultaneous playback of the files stored separately in step 2 is incorporated in the computer, and the projectors 35, 36, 37, and 38 for the front, back, right side, and left side are respectively installed. Can be sent.

  Accordingly, the computer 7 inputs each captured image from at least four cameras, stores these as original images, performs image processing for correcting trapezoidal distortion, and then performs simultaneous playback processing of a plurality of videos.

  The video on which the image distortion correction processing and the simultaneous reproduction processing are performed is output from the computer 7 to at least four projectors 6.

  At least four cameras are used for the front, back, right side, and left side, and a still image or video of the same object or person as a subject is photographed on a substantially circumference centered on the subject. The captured image is input to the computer 7 by a recording medium such as an SD card memory.

  Next, the use of the present invention will be described.

  First, at least four cameras are prepared for the front, back, right side, and left side, and the same object as a subject or a still image or video of a person as a subject is approximately circled around the subject. Images are taken from positions at equal intervals, and the captured images are input to the computer 7 through a recording medium such as an SD card memory.

  The computer 7 saved the images from the four cameras arranged at the positions of the front, back, right side, and left side as original images in separate files, and then performed image processing for correcting the trapezoidal distortion.

  Then, the computer 7 performs simultaneous reproduction processing of a plurality of videos. After this simultaneous reproduction processing, a process for automatically floating the standing image on the upper opening 25 of the parabolic mirror 10 proceeds.

  Projected images 35, 36, 37 arranged on the front, back, right side, and left side from the computer 7 are images that have been subjected to image processing for correcting trapezoidal distortion by the computer 7 and simultaneous playback processing of a plurality of images. 38.

  The projected images from the four projectors 35, 36, 37, and 38 are simultaneously emitted toward the screen with an upward angle.

  The emitted light is applied to the front and back surfaces of the screen 13 that rotates integrally with the cylindrical portion only when it enters from the opening 12 of the cylindrical portion 11 disposed on the rotating drum 5 that rotates at a predetermined rotational speed. It is projected onto the existing reflective surface.

  The light incident on the reflecting surface of the screen 13 installed vertically is reflected at the same emission angle as the incident angle with respect to the reflecting surface of the screen 13 and enters the parabolic mirror 10.

  The light incident on the parabolic mirror 10 is repeatedly reflected in the parabolic mirror 10 and finally floats a standing image in the upper opening 25 of the parabolic mirror 10.

  Next, although an Example is given and this invention is demonstrated, this invention is not limited by an Example.

  A parabolic mirror 10 having a diameter of 28 inches, a height of 8 inches, and an opening diameter of 6 inches was prepared.

  The rotating drum 5 was painted in black with a diameter of 16 cm, a height of 16 cm, a width of 0.4 cm, an opening size of 11 cm × 8 cm (maximum width), and was made of ceramic.

  As the projector 6, a model KG-PL105S (manufactured by Kaga Component Co., Ltd.) was used.

  Since the image of 30 frames / second is projected from the projector 6 and the image from the projector 6 is projected onto the screen 13 having two reflecting surfaces, the rotational speed of the rotary drum 5 is 15 rotations / second, It was 900 rpm.

  The upward angle of the projector 6 with respect to the horizontal was 12 degrees. This balances between increasing the upward angle for projection on the upper part of the screen 13 and increasing the focal difference between the upper and lower parts of the image projected on the screen 13 if the upward angle is too large. We decided after examination.

  In FIG. 8, the distance W from the projector lens A to the upper end of the screen 13 is 27 cm, the distance L from the projector lens A to the center of the screen 13 is 25 cm, and the distance R from the projector lens A to the lower end of the screen 13 is 23 cm.

  And W value and R value were input into the computer 7, and the trapezoid distortion correction factor 0.85 was calculated | required by the computer 7 from 23 cm / 27 cm.

  After the above preparation, a person was photographed with four cameras 31, 32, 33, and 34 arranged for the front, back, right side, and left side and input to the computer 6.

  The computer 7 stores the captured image in a file for each camera 31, 32, 33, or 34, and performs image processing for correcting the upper end with a trapezoidal distortion correction factor 0.85 with the lower end of the image as a reference. .

  And the following processes were executed automatically. The stored images of the respective files are simultaneously reproduced and sent to the four projectors 35, 36, 37, and 38 at a rate of 30 frames / second, and the four projectors 35, 36, 37 are sent. And 38 toward the screen 13 of the rotating drum.

  The light that has passed through the opening 12 of the cylindrical portion 11 rotating at 900 rpm is projected onto the suspended screen 13, and the light incident on the reflective surface of the screen 13 is emitted at the same angle as the incident angle with respect to the reflective surface of the screen 13. The light was reflected at the corner and entered the parabolic mirror 10.

  The light incident on the parabolic mirror 10 was repeatedly reflected in the parabolic mirror 10, and then a human stereoscopic image of about 10 cm was formed on the upper opening 25 of the parabolic mirror 10. While standing around the parabolic mirror in which the person's stereoscopic image was suspended, the standing state could be confirmed from the front, back, right side, and left side.

DESCRIPTION OF SYMBOLS 1 Parabolic mirror 2 Still object 3 Imaging 4 Observer's viewpoint 5 Rotating drum 6 Projector 7 Computer 8 Optical path
DESCRIPTION OF SYMBOLS 9 Floating image 10 Parabolic mirror 11 Cylindrical part 12 Opening part 13 Screen 14 Image on screen 15 Rotating shaft 16 Motor 17 Roll 20 Original picture 21 Image before scale adjustment 22 Image after scale adjustment 23 Upper paraboloid mirror 24 Lower part Parabolic mirror 31 Camera A
32 Camera B
33 Camera C
34 Camera D
35 Projector A
36 Projector B
37 Projector C
38 Projector D
A Projector lens X Projectable range W Distance from the projector lens to the top of the screen L Distance from the projector lens to the center of the screen R Distance from the projector lens to the bottom of the screen α Angle between the projector and the screen β Spread angle from the center of the projector lens

Claims (7)

  Paraboloid mirrors that form a paraboloid face up and down and have an opening in the center of each, and a paraboloid that is suspended from the lower paraboloid mirror opening, A cylindrical screen with a part protruding into the mirror and a cylindrical cylinder that is provided so as to surround a portion of the screen that does not protrude into the parabolic mirror and has an opening formed in part. A rotating drum that is disposed below the parabolic mirror, has a rotation axis on an extension line of the central axis of the parabolic mirror opening, and rotates by connecting the screen and the cylindrical portion; A plurality of projectors arranged at equal intervals on the same circumference around the rotation axis of the rotating drum, and a computer that inputs a plurality of captured images and performs image distortion correction processing and simultaneous reproduction processing of the captured images. A floating stereoscopic display system characterized by comprising means for including.   The opening formed in the cylindrical portion is two rectangular openings provided at symmetrical positions around the rotation axis of the rotating drum, and the opening width of the opening has an adjustable mechanism. The floating stereoscopic display device system according to claim 1.   3. The floating stereoscopic display according to claim 1, wherein a surface of the flat screen is disposed in a positional relationship parallel to the opening surface of the cylindrical portion, and both the front and back surfaces of the screen are reflection surfaces. Equipment system.   The plurality of projectors are installed obliquely upward at the same angle so that the upper ends of the images from the plurality of projectors are projected in the vicinity of the upper end of the portion projected into the parabolic mirror of the screen. The floating stereoscopic display device system according to any one of claims 1 to 3.   5. The floating stereoscopic display device according to claim 1, wherein an image distortion correction processing program for matching a scale from the upper end to the lower end of the image projected on the reflection surface of the screen is incorporated in the computer. system.   Procedure for entering and storing W and R values on a computer, where W is the distance from the center of the projector lens to the top of the image on the screen and R is the distance from the center of the projector lens to the bottom of the image on the screen. , The procedure for capturing a captured image and storing it as an original image, the procedure for calculating R / W as a reduction ratio, the horizontal dimension of the lower end of the stored original image is obtained, and the horizontal dimension of the upper end of the original image is determined based on the horizontal dimension of the lower end of the original image. A step of reducing the horizontal dimension of the lower end of the original picture to a horizontal dimension obtained by multiplying the reduction ratio of R / W, and a procedure of creating a trapezoidal original picture by gradually changing the scale of the original picture between the reduced upper end and the non-reduced lower end. 6. The floating stereoscopic display device system according to claim 1, wherein an image distortion correction processing program is incorporated.   A program for storing at least four videos of the same subject taken from different directions and a simultaneous playback program for executing a procedure for simultaneously playing back the stored at least four videos is incorporated in the computer. Item 7. The floating stereoscopic display device system according to any one of Items 1 to 6.

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