Electronic realization of coarse integral volumetric imaging with wide viewing angle

2014

SPIE Proceedings

Self Cite

A real-time and wide-field-of-view image pickup system for coarse integral volumetric imaging (CIVI) is realized. This system is to apply CIVI display for live action videos generated by the real-time 3D reconstruction. By using multiple RGB-D cameras from different directions, a complete surface of the objects and a wide field of views can be shown in our CIVI displays. A prototype system is constructed and it works as follows. Firstly, image features and depth data are used for a fast and accurate calibration. Secondly, 3D point cloud data are obtained by each RGB-D camera and they are all converted into the same coordinate system. Thirdly, multiview images are constructed by perspective transformation from different viewpoints. Finally, the image for each viewpoint is divided depending on the depth of each pixel for a volumetric view. The experiments show a better result than using only one RGB-D camera and the whole system works on the real-time basis.

Section: Introductionmentioning

confidence: 99%

Wide-field-of-view image pickup system for multiview volumetric 3D displays using multiple RGB-D cameras

Luo

2014

SPIE Proceedings

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“…Coarse integral volumetric imaging (CIVI) is a 3D display solution that can provide not only binocular parallax, but also motion parallax and focal depth without geometrical distortion [1][2][3]. CIVI combines volumetric technique with multiview technique based on integral imaging.…”

Section: Introductionmentioning

confidence: 99%

Realization of precise depth perception with coarse integral volumetric imaging

Sawada

2011

SPIE Proceedings

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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. kyewords coarse integral volumetric imaging, optical distortion, depth perception, vergence-accommodation conflict, refractometer, texture mapping

“…To solve this problem, Kakeya et al proposed coarse integral volumetric imaging (CIVI), which combines volumetric solution with the multiview solution based on CII [5,6,7]. To realize CIVI, layered transparent display panels are used instead of a single layer display panel in CII.…”

Section: Introductionmentioning

confidence: 99%

Coarse integral volumetric imaging with flat screen and wide viewing angle

Sawada

2012

J. Electron. Imaging

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. kyewords coarse integral volumetric imaging, volumetric display, multiview display, real image, aberration, distortion, viewing angle, lens