ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
Search
Advanced search
OR
Browse
Search
39.34
Displaying 1-10 of 10 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (12K)
  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (24K)
  • Fast Image Computation for Multilayer Displays
    Hironobu GOTODA
    Article type: Article
    Session ID: AIT2015-106/3DIT2015
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    This paper presents a new method to convert a light field into a set of layered images suitable for showing on multilayer displays. In conventional methods, such a conversion generally involves a time-consuming optimizing process, which prevents us from computing the images in real time. Here we discuss that the conversion can be simplified substantially by imposing additional constraints on the light field as well as on the optical properties of LC (liquid crystal) panels to be embedded into multilayer displays. We then examine the computational efficiency of the proposed method using a few sample 3D scenes. In particular, the method is shown to work almost in real-time without any assistance of GPUs.
    View full abstract
    Download PDF (7330K)
  • Mutual Occlusion Culling for Orthographic Ray-Sampling Plane Hologram
    Shunsuke Igarashi, Tomoya Nakamura, Masahiro Yamaguchi
    Article type: Article
    Session ID: AIT2015-107/3DIT2015
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Computer-generated hologram using ray-sampling (RS) plane can reproduce realistic 3D image even with deep scene. In our previous study, orthographic projection was introduced to the method to accelerate the calculation. In this report, we propose a calculation method to realize mutual occlusion culling between multiple orthographic RS planes. The proposed method enables us to synthesize a hologram for deep virtual scene in practical time thanks to the compression of calculation in wave propagation and occlusion processing. In the experiment, we experimentally verified that the occlusion effect was successfully reproduced in axially continuous objects, and the calculation was accelerated compared to the previous RS-based method.
    View full abstract
    Download PDF (11015K)
  • Improvement of Rotating Screen in 360-degree Holographic Display
    Tatsuaki INOUE, Yasuhiro TAKAKI
    Article type: Article
    Session ID: AIT2015-108/3DIT2015
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Previously, a table screen 360-degree holographic display was proposed, with an increased screen size, having an expanded viewing zone over all horizontal directions around the table screen, and the proposed technique was experimentally verified. However, the experimental system has two problems. One is generation of the duplex reconstructed image in the screen, and the other is instability of the rotary control of the screen. In this study, the screen has been redesigned in consideration of the diffusion angle of the vertical diffuser used in the system. In addition, stabilization of the rotary control of the screen was achieved by changing of the rotating mechanism.
    View full abstract
    Download PDF (4582K)
  • The image quality control by non-linear conversion of CGH
    Hiroki UETAKE, Takeshi YAMAGUCHI, Hiroshi YOSHIKAWA
    Article type: Article
    Session ID: AIT2015-109/3DIT2015
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Computer-generated hologram (CGH), has been carried out the calculation of complex scenes in high resolution. Therefore, it is objectively evaluated by the diffraction efficiency and PSNR, studies have been made about the difference in image quality due to calculation methods. In this study, by using the non-linear transformation on the interference pattern of the Fourier transform hologram, it was proposed to control the quality of the reconstucted image. If you have made an image to a polyline correction and gamma correction of the interference fringes, with an amplitude hologram, towards the polyline correction is found to be a decrease in image quality is suppressed, the phase hologram it was found that the difference in image quality due to the correction method is small.
    View full abstract
    Download PDF (9897K)
  • Fast Calculation Method of Computer-generated Hologram Using Geometric Sequence
    Yuji Sakamoto, Takuya Sugawara, Ryosuke Watanabe
    Article type: Article
    Session ID: AIT2015-110/3DIT2015
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    A point light source method and a polygon model are popular methods for modeling and calculation methods of computer-generation hologram. This paper discusses fast calculation methods for a polygon modeling using the calculation method of the point light source method. The methods are based on geometric sequences and provide constant calculation times that are proportional to the number of polygons, but the one of point light sources. Moreover, it is possible to perform very fast calculations using a GPU because the methods are suitable to super parallel calculations.
    View full abstract
    Download PDF (492K)
  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (81K)
  • [title in Japanese]
    Article type: Appendix
    Pages App2-
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_App2
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (81K)
  • [title in Japanese]
    Article type: Appendix
    Pages App3-
    Published: September 04, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.34.0_App3
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (81K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top