著者

Sawada Shimpei Kakeya Hideki

出版者

Society of Photo-optical Instrumentation Engineers

雑誌

Proc. SPIE, Stereoscopic Displays and Applications XXII (ISSN:0277786X)

巻号頁・発行日

vol.7863, pp.78631L, 2011

被引用文献数

2

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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.

著者

Kurokawa Tomoya Kakeya Hideki

出版者

Society of Photo-optical Instrumentation Engineers

雑誌

Proc. SPIE, Stereoscopic Displays and Applications XXII (ISSN:0277786X)

巻号頁・発行日

vol.7863, pp.78631M, 2011

被引用文献数

3

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Coarse integral imaging (CII), where each elemental lens is large enough to cover pixels far more than the number of views, can show clear floating 3D image when distortion is corrected. One of the major problems left to be solved for CII is suppression of pseudo images that appear around the right image to be presented. In this paper we propose two methods to suppress pseudo images. We first propose use of a lens array with a small F number. When a lens array composed of elemental lenses whose F number is small is set in front of the display panel, pseudo images can be erased by total internal reflection on the outskirt of the large aperture lens because the angle of incidence of the light ray that generates pseudo images becomes larger. The second method we propose is use of a lens array behind the display panel paired with segmented backlight. When convex lenses are set in front of the backlight with limited aperture, leak of ray out to adjacent elemental lenses can be avoided. Since the backlight area is reduced, this method can also reduce consumption of electric power without diminishing brightness of the right image.