摘要 :
A reality-enhanced autostereoscopic display system is presented. In this system, the viewers who do not wear any special glasses can perceive 3-D images within their hands' reach with little sense of incongruity. The feature of th...
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A reality-enhanced autostereoscopic display system is presented. In this system, the viewers who do not wear any special glasses can perceive 3-D images within their hands' reach with little sense of incongruity. The feature of this system is combination of real image generation and parallax presentation. Real image of the display in the back is generated in the air by using Fresnel lenses, which has made it possible to narrow artificial parallax to display 3-D objects in the workspace near the viewer without interfering the viewers' motion. Smaller artificial parallax leads to 3-D perception with more reality and less eyestrain than the conventional 3-D displays. For parallax presentation an mobile filter which plays the role of stereoscpopic goggles is set between the display in the back and the Fresnel lenses and is controlled so that it follows the motion of the viewer to keep on presenting different images to each eye. To present undistorted 3-D space the optical path including refraction by Fresnel lenses is calculated and the image on the screen is updated based on it. Real-time undistorted image presentation to unrestricted eye positions is realized by suing texture mapping technique.
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Coarse integral volumetric imaging (CIVI) combines multiview and volumetric display solutions and presents undistorted floating 3D image by correcting distortion of volumetric image for each view. In the conventional CIVI with lim...
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Coarse integral volumetric imaging (CIVI) combines multiview and volumetric display solutions and presents undistorted floating 3D image by correcting distortion of volumetric image for each view. In the conventional CIVI with limited viewing angle, distortions of image planes can be approximated to be parabolic in the direction of depth, while those in horizontal and vertical directions can be ignored. When the viewing angle becomes wider, however, this approximation cannot realize presentation of undistorted image. To cope with the strong distortions, the method the authors propose calculate z-coordinate of the generated real image is in detail and depicts each pixel on the display panel of the corresponding depth. Also distortions in horizontal and vertical directions are corrected by using texture mapping. To attain precise correction in vertical, horizontal and depth directions, optical paths of light rays between the display panel and each viewpoint are calculated with an optical simulator. Color aberration can also be corrected by mapping red, green and blue textures separately based on the result of the optical simulation.
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Coarse integral volumetric imaging (CFVT) combines multiview and volumetric display solutions and presents undistorted floating 3D image by correcting distortion of volumetric image for each view. In the conventional CIVI with lim...
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Coarse integral volumetric imaging (CFVT) combines multiview and volumetric display solutions and presents undistorted floating 3D image by correcting distortion of volumetric image for each view. In the conventional CIVI with limited viewing angle, distortions of image planes can be approximated to be parabolic in the direction of depth, while those in horizontal and vertical directions can be ignored. When the viewing angle becomes wider, however, this approximation cannot realize presentation of undistorted image. To cope with the strong distortions, the method the authors propose calculate z-coordinate of the generated real image is in detail and depicts each pixel on the display panel of the corresponding depth. Also distortions in horizontal and vertical directions are corrected by using texture mapping. To attain precise correction in vertical, horizontal and depth directions, optical paths of light rays between the display panel and each viewpoint are calculated with an optical simulator. Color aberration can also be corrected by mapping red, green and blue textures separately based on the result of the optical simulation.
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This paper proposes a high resolution integral imaging system using a lens array composed of non-uniform decentered elemental lenses. One of the problems of integral imaging is the trade-off relationship between the resolution and...
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This paper proposes a high resolution integral imaging system using a lens array composed of non-uniform decentered elemental lenses. One of the problems of integral imaging is the trade-off relationship between the resolution and the number of views. When the number of views is small, motion parallax becomes strongly discrete to maintain the viewing angle. The only conventional way to solve this problem is to use a finer lens array and a display panel with a finer pixel pitch. In the proposed method large display area is used to show a smaller and finer 3D image. To realize it, the elemental lenses should be smaller than the elemental lenses. To cope with the difference of sizes between the elemental images and the elemental lenses, the lens array is designed so that the optical centers of elemental lenses are located in the centers of elemental images, not in the centers of elemental lenses. In addition, new image rendering algorithm is developed so that undistorted 3D image can be presented with a non-uniform lens array. The proposed design of lens array can be applied to integral volumetric imaging, where display panels are layered to show volumetric images in the scheme of integral imaging.
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摘要 :
This paper proposes a high resolution integral imaging system using a lens array composed of non-uniform decentered elemental lenses. One of the problems of integral imaging is the trade-off relationship between the resolution and...
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This paper proposes a high resolution integral imaging system using a lens array composed of non-uniform decentered elemental lenses. One of the problems of integral imaging is the trade-off relationship between the resolution and the number of views. When the number of views is small, motion parallax becomes strongly discrete to maintain the viewing angle. The only conventional way to solve this problem is to use a finer lens array and a display panel with a finer pixel pitch. In the proposed method large display area is used to show a smaller and finer 3D image. To realize it, the elemental lenses should be smaller than the elemental lenses. To cope with the difference of sizes between the elemental images and the elemental lenses, the lens array is designed so that the optical centers of elemental lenses are located in the centers of elemental images, not in the centers of elemental lenses. In addition, new image rendering algorithm is developed so that undistorted 3D image can be presented with a non-uniform lens array. The proposed design of lens array can be applied to integral volumetric imaging, where display panels are layered to show volumetric images in the scheme of integral imaging.
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In this paper realization of precise depth perception using coarse integral volumetric imaging (CIVI) is discussed. CIVI is a 3D display technology that combines multiview and volumetric solutions by introducing multilayered struc...
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In this paper realization of precise depth perception using coarse integral volumetric imaging (CIVI) is discussed. CIVI is a 3D display technology that combines multiview and volumetric solutions by introducing multilayered structure to integral imaging. Since CIVI generates real images optically, optical distortion can cause distortion of 3D space to be presented. To attain presentation of undistorted 3D space with CIVI, the authors simulate the optics of CIVI and propose an algorithm to show undistorted 3D space by compensating the optical distortion on the software basis. The authors also carry out psychophysical experiments to verify that vergence-accommdation conflict is reduced and depth perception of the viewer is improved by combining multiview and volumetric technologies.
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摘要 :
This paper proposes an electronic version of coarse integral volumetric imaging (CIVI) display with wide viewing angle. CIVI is a 3D display solution which combines multiview techniques based on integral imaging with volumetric te...
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This paper proposes an electronic version of coarse integral volumetric imaging (CIVI) display with wide viewing angle. CIVI is a 3D display solution which combines multiview techniques based on integral imaging with volumetric techniques using multilayer panels. Though CIVI has solved most of the major problems of conventional 3D displays, it still has two shortcomings to be overcome. One is the difficulty in realizing electronic display due to unavailability of electronic color display panels transparent enough to be layered for volumetric imaging. The other is the limited viewing angle because of the aberration of lenses. As for the former problem the simplest way to attain electronic version of CIVI is to use half mirrors to merge multiple images from different depths. Though high quality 3D image can be attained with this method, the system size becomes large. To avoid bulky mirror system and realize compact system size, the authors propose layered use of a color panel and multiple monochrome panels to emulate color volumetric display. To expand viewing angle, the authors propose a display system where smaller CIVI display components, each of which has little aberration, are connected so that each display plane faces toward the center of the image optically generated.
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摘要 :
This paper proposes an electronic version of coarse integral volumetric imaging (CIVI) display with wide viewing angle. CIVI is a 3D display solution which combines multiview techniques based on integral imaging with volumetric te...
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This paper proposes an electronic version of coarse integral volumetric imaging (CIVI) display with wide viewing angle. CIVI is a 3D display solution which combines multiview techniques based on integral imaging with volumetric techniques using multilayer panels. Though CIVI has solved most of the major problems of conventional 3D displays, it still has two shortcomings to be overcome. One is the difficulty in realizing electronic display due to unavailability of electronic color display panels transparent enough to be layered for volumetric imaging. The other is the limited viewing angle because of the aberration of lenses. As for the former problem the simplest way to attain electronic version of CIVI is to use half mirrors to merge multiple images from different depths. Though high quality 3D image can be attained with this method, the system size becomes large. To avoid bulky mirror system and realize compact system size, the authors propose layered use of a color panel and multiple monochrome panels to emulate color volumetric display. To expand viewing angle, the authors propose a display system where smaller CIVI display components, each of which has little aberration, are connected so that each display plane faces toward the center of the image optically generated.
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The authors propose an electronic 3D display combining a multiview display and a volumetric display. Conventional multiview displays often give the viewers severe eyestrains because of the contradiction between binocular convergen...
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The authors propose an electronic 3D display combining a multiview display and a volumetric display. Conventional multiview displays often give the viewers severe eyestrains because of the contradiction between binocular convergence and focal accommodation of the eyes. Though volumetric displays are free from the contradiction, they cannot express occlusion or gloss of the objects. The proposed system overcomes these disadvantages at once by displaying colors by the multiview display part and fine contrast of edges by the volumetric display part. As for the multiview display we use conventional multiview technologies. As for the volumetric, we use multilayer monochrome TFT liquid crystal panels. Here we can use monochrome panels because the volumetric part is just in charge of expressing edge contrast. This can sufficiently lead proper accommodation since focal accommodation of our eyes is dependent only on the edge of the image. To connect the edges of adjacent panels smoothly, we apply DFD approach, where the point in the middle of two panels is expressed by depiction on both panels.
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摘要 :
The authors propose an electronic 3D display combining a multiview display and a volumetric display. Conventional multiview displays often give the viewers severe eyestrains because of the contradiction between binocular convergen...
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The authors propose an electronic 3D display combining a multiview display and a volumetric display. Conventional multiview displays often give the viewers severe eyestrains because of the contradiction between binocular convergence and focal accommodation of the eyes. Though volumetric displays are free from the contradiction, they cannot express occlusion or gloss of the objects. The proposed system overcomes these disadvantages at once by displaying colors by the multiview display part and fine contrast of edges by the volumetric display part. As for the multiview display we use conventional multiview technologies. As for the volumetric, we use multilayer monochrome TFT liquid crystal panels. Here we can use monochrome panels because the volumetric part is just in charge of expressing edge contrast. This can sufficiently lead proper accommodation since focal accommodation of our eyes is dependent only on the edge of the image. To connect the edges of adjacent panels smoothly, we apply DFD approach, where the point in the middle of two panels is expressed by depiction on both panels.
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