ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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35.35
Displaying 1-14 of 14 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Implementation of an Autostereoscopic Display Using Multilayer LCDs
    Hironobu GOTODA
    Article type: Article
    Session ID: AIT2011-66/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A multilayer display is a device constructed by stacking multiple LCDs along with a pair of polarizers on top of a light source. Previous theoretical analyses have indicated that such a display could show the light field of a 3D scene if the panels in the display are properly controlled. However, implementations realizing this feature have not been reported yet. In this study, we present an implementation of a monochromatic multilayer display using IPS-LCDs, and report that an approximation of the light field is actually observed from the display.
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  • 2-dimensional Periodic Stereo Image made as multi-view 3D image
    Noriji OISHI
    Article type: Article
    Session ID: AIT2011-67/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Periodic Stereo Image (PSI), which has the features of no pseudoscopic regions and no viewing zone boundaries, was initially designed as developed moire stereoscopy, then another preparation method by which it was considered to be a kind of integral photography was discovered. In addition, it was reported that the 1-dimensional PSI using lenticular lens could be made as ordinary multi-view 3D image, and which increased variety of design. In this study, the method of multi-view 3D was adapted to 2- dimensional PSI, and it was confirmed that a variety of PSI could be created. In this experiment, orthogonally superposed two lenticular lenses were used instead of 2- dimensional lens array.
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  • Speedup and scale-up of creation of polygon-based high-definition CGH by using parallel distributed processing
    Kohei OGAWA, Kentaro HIGASHI, Kyoji MATSUSHIMA, Sumio NAKAHARA
    Article type: Article
    Session ID: AIT2011-68/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Polygon-based methods accelerate computation of high-definition computer-generated holograms (CGH). However, the computation time is still very long in the cases where the object model has severe self-occlusion, because processing of hidden surface is necessary for computing the object field. In this report, a novel technique using distributed processing is proposed to speed up and scale-up the computation of high-definition CGHs of self-occluded objects employing the polygon-based method and the silhouette method.
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  • High-Definition Image CGH Created by Polygon-Based Method and its Reconstruction by White Light
    Hiroshi YAMASHITA, Kyoji MATSUSHIMA, Sumio NAKAHARA
    Article type: Article
    Session ID: AIT2011-69/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Image-type binary CGHs commonly lost the surface shading and texture-mapping in the optical reconstruction. This is caused by the binary amplitude fringe that is unable to reconstruct object brightness because amplitude information of the object field is removed by binarization if the object is close to the hologram. In this paper, an optimized error diffusion technique is proposed to improve shading and texture-mapping. Image-type high-definition CGHs created by the proposed technique can be reconstructed by white light.
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  • Image quality improvement of image type computer-generated hologram
    Yayoi NAKAGUCHI, Takeshi YAMAGUCHI, Hiroshi YOSHIKAWA
    Article type: Article
    Session ID: AIT2011-70/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The image hologram can be reconstructed by the white light because the recorded image is placed very close or overlapping on the hologram to reduce the chromatic image blur. Since the file size of the practical hologram becomes huge, the hologram is divided into small segments. In our previous study, each segment is calculated independently and it causes the problem of the intensity fluctuation between segments, which makes the image observation very annoying. This fluctuation is also the problem for the computer-generated rainbow hologram. In this paper, we propose a method to eliminate the intensity fluctuation by the global normalization of the hologram. The experimental results are also shown.
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  • Tangible learning with augmented reality technology : The learning to setup the transfer hologram
    Masashi SHIBATA, Takeshi YAMAGUCHI, Hiroshi YOSHIKAWA
    Article type: Article
    Session ID: AIT2011-71/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
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    When shooting a hologram, it is necessary to build the optical system in the darkroom with careful handling. Also, it is difficult to teach the setup of the optical system to the beginner in the darkroom. For the beginner, the training material which can be used anytime, anywhere is required. In our previous study, we have proposed the training tool named "Holographer Trainer". By using the Augmented Reality, Holographer Trainer can simulate the setup of the optical system for the hologram. Our previous system only teaches how to make the master hologram. However, since for a white light reconstruction, the master hologram is optically transferred to the second hologram as the transfer hologram. In this study, to record the parameter of the object and the reference beam at the time of shooting for the master hologram, users can learn the optical system construction for the transfer hologram. As a result, new application system is able to teach the process of how to make the master and transfer hologram.
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  • The comparative examination of the animation reconstructed image of the kinoform and the hologram which used high-precision liquid crystal device of a phase modulation type
    Masataka TOZUKA, Koki SATO, Kunihiko TAKANO, Makoto OHKI
    Article type: Article
    Session ID: AIT2011-72/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    It is reconstructing an animation with the white LED or the red LD in the hologram data which was synthesized by the Fourier transformation of the taking with the computer above 50fps from the entry taking a picture on the spot image (e.g., 262,144 elements in a 512×512 matrix); of the camera at present. By this system, using the phase modulation type high-precision liquid crystal device, it is proceeding with an animation reconstruction experiment on the kinoform and the phase hologram and this time, it reports it on their comparative examination.
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  • Multi-view three-dimensional image generation by hologram display module
    Yasuhiro Takaki
    Article type: Article
    Session ID: AIT2011-73/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_29
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The holographic display module employing the resolution redistribution optics can increase both the viewing zone angle and the screen size of holography. Moreover, multiple modules can be aligned two-dimensional to enable further increase in the screen size. In this study, the multi-view display technique was developed for the holographic display module, which is based on the holographic stereogram. Although holography can generate natural three-dimensional images with which the accommodation function works and which have smooth motion parallax, the developed multi-view display technique is useful for studies of the super multi-view display technique because the number of viewing points and their interval can be electronically altered.
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  • Three-Dimensional Motion-Picture Imaging of a Biological Object by Parallel Phase-Shifting Digital Holographic Microscopy using a High-Speed Camera
    Tatsuki Tahara, Ryosuke Yonesaka, Takashi Kakue, Peng Xia, Yasuhiro Aw ...
    Article type: Article
    Session ID: AIT2011-74/3DIT2011-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_33
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We report three-dimensional (3D) motion-picture imaging of a biological object in the microscopic field of view by parallel phase-shifting digital holographic microscopy using a high-speed camera. Parallel phase-shifting digital holographic microscopy is a technique for high-quality and instantaneous 3D imaging of specimens in the microscopic field of view. This microscopy has been experimentally verified. This time, by applying a high-speed camera to the constructed optical system, we succeeded in recording motion-pictures of a dynamic motion of a biological object in water at 20,000 frames-per-second, which is the fastest among the previous reports on 3D imaging of a biological object.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Appendix
    Pages App2-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_App2
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (99K)
  • [title in Japanese]
    Article type: Appendix
    Pages App3-
    Published: September 02, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.35.0_App3
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (99K)
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