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36.12
Displaying 1-20 of 20 articles from this issue
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Article type: Cover
Pages Cover1-
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (13K) -
Article type: Index
Pages Toc1-
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
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Article type: Bibliography
Pages Misc1-
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
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Hiroyasu UJIKE, Hiroshi WATANABEArticle type: Article
Session ID: 3DIT2012-1/HI2012-32
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSInterocular discrepancy of stereoscopic images, which can be considered as factors for inducing visual fatigue of viewers, includes size difference, vertical shift, rotational shift, differences in luminance, chromaticity and time. The study investigates the effect of interocular crosstalk by manipulating it as four different steps for comparison while other conditions are controlled. Psychological (subjective scoring) and physiological (autonomic nervous activity) measurements are done while watching stereoscopic images in four sessions, each of which lasts 10 minutes. The results show the effects of interocular crosstalk on visual fatigue, while the effects seem decrease with time.View full abstractDownload PDF (675K) -
Hiroshi WATANABE, Hiroyasu UJIKEArticle type: Article
Session ID: 3DIT2012-2/HI2012-33
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe cause of visual fatigue which stereoscopic images provides could be summarized into two issues, one is the issue of disagreement between vergence and accommodation and the other is the issue of interocular discrepancy. The latter issues might be considered to consists of vertical misalignment, rotational misalignment, difference of luminance, difference of color, temporal synchronization and so on. Recently we controlled these factors using the same stimuli and tried to measure quantitatively biomedical effects using with physiological (autonomic nervous system) and psychological (subjective scores concerning visual fatigue) indexes. In this paper, we report the experimental results using the factor of rotational difference.View full abstractDownload PDF (715K) -
Haruki MIZUSHINA, Ippei NEGISHI, Hiroshi ANDO, Shinobu MASAKIArticle type: Article
Session ID: 3DIT2012-3/HI2012-34
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe conflict between accommodation and vergence is one of the possible cause of visual fatigue while viewing stereoscopic display. Traditional two-view and multi-view stereoscopic displays cannot match distance information of accommodation with that of vergence, however, in principle, reconstructed 3D images of electronic holography can. In this study we measured accommodation and vergence responses simultaneously while viewing stereoscopic images of holographic, super-multi view (SMV), and two-view displays. Accommodation and vergence responses to holographic and SMV stereoscopic images were similar to the responses to the real target.View full abstractDownload PDF (624K) -
Taichi TAKAHASHI, Junya NAKAMURA, Yasuhiro TAKAKIArticle type: Article
Session ID: 3DIT2012-4/HI2012-35
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA reduced-view super multi-view display, which we proposed in the previous study, generates viewing zones only around a viewer's left and right eyes in order to reduced the resolution required for a flat-panel display that constitutes a super multi-view display. In a subsequent study, we combined an eye tracking system using a stereo camera with the reduced-view SMV display in order to enlarge the viewing region in the horizontal direction and the depth direction. In this technique, the viewing region in the depth direction is limited by the restriction of image synthesis. Also, the viewing region in the horizontal direction is limited by the view angle of cameras that constitute a stereo camera. In the present study, the limitations of the viewing region in the horizontal direction and the depth direction are analyzed. The viewing region in which the eye tracking can be performed was experimentally verified using an experimental system.View full abstractDownload PDF (580K) -
Toru IWANEArticle type: Article
Session ID: 3DIT2012-5/HI2012-36
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper presents our developing integral 3D display which has some analogies with a light-field camera in the cause of transformation between 3D and 2D information. As is widely known, a light-field camera has ability to record 3D images in a 2D plane of detector based on plenoptic principles. And this display decodes this 2D information of "encoded 3D images" into 3D images in reverse, using plenoptic principles. This transformation means that this display reproduces 3D image planes, instead of 3D real images. Nevertheless you could find this type of display gives you natural 3D images on the screen.View full abstractDownload PDF (996K) -
Kunio YAMADA, Yasuhiro TAKAKI, Junya NAKAMURA, Shinobu MASAKI, Haruki ...Article type: Article
Session ID: 3DIT2012-6/HI2012-37
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes concepts and achievements of the NICT (National Institute of Information and Communications Technology)'s Collaborative Research Program #135 (20082012), "Development of High-Quality Glass-free 3D System: Super-high Density Image Devices, Holographic Displays and Human Evaluations".View full abstractDownload PDF (1397K) -
Takanori SENOH, Akira OHTOMO, Kenji YAMAMOTO, Ryutaro OI, Yasuyuki Ich ...Article type: Article
Session ID: 3DIT2012-7/HI2012-38
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSElectronic holography images of large size and wide viewing-zone-angle are currently difficult to generate since they require display pixels of comparable size as light wave length. Image projection method can realize the enlargement of either image size or viewing-zone-angle, but not both. In this paper, we report an experimental study of enlargement of both 3D image size and the viewing-zone-angle by projecting 3D images in water where minute particles are dispersed.View full abstractDownload PDF (817K) -
Kyohei IKEDA, Junnya NAKAMURA, Yasuhiro TAKAKAIArticle type: Article
Session ID: 3DIT2012-8/HI2012-39
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe holographic display module that is based on the resolution redistribution technique can enlarge both the viewing zone angle and the screen size. Moreover, the module has the frameless screen so that the screen size can be further increased by arranging multiple modules two-dimensionally. In this study, an LCOS type spatial light modulator, which has the resolution of 4,096×2,400 and the pixel pitch of 4.8μm, was used to construct a holographic display module that has the viewing zone angle of 11° and the screen size of 2.0 inches. The constructed module had flat side surfaces so that multiple modules can be arranged seamlessly. We constructed two modules and the connection of the two modules was demonstrated.View full abstractDownload PDF (945K) -
Wataru TERAMOTO, Kazuhiro YOSHIDA, Nobuko ASAI, Souta HIDAKA, Jiro GYO ...Article type: Article
Session ID: 3DIT2012-9/HI2012-40
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecent advancement of information and communication technologies has evoked expectations for more natural and realistic communications. To this end, the enhancement of a sense of presence-subjective experience of being in one place even when one is physically situated in another-has been the most important issue. In the present study we first discuss the essence of sense of presence based on our recent survey of more than 200 non-researchers. Next, we show spatio-temporal characteristics for vraisemblance, which is the reality or virtuality assumed to link essentially to foreground components in a scene, while contrasting it with the sense of presence, which, theoretically and empirically, has been found to relate dominantly to background components contained in a scene. Lastly we introduce most recent research on a sense of being together, which is assumed to be one of the essential issues in communication with other persons in a virtual environment.View full abstractDownload PDF (1321K) -
Hiroshi WATANABEArticle type: Article
Session ID: 3DIT2012-10/HI2012-4
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe introduced, in this paper, that the psychophysics data were obtained in the immersive types of virtual reality equipments and argued the effects of 'wide viewing angle' on both spatial recognition and walking behavior.View full abstractDownload PDF (743K) -
Takahiro MATSUBARA, Naoki KAWAI, Hideki YAMAZAKIArticle type: Article
Session ID: 3DIT2012-11/HI2012-4
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe propose a walkthrough method for captured space along networked routes. The method first takes a movie for each of segments in the route independently using the spherical camera, then it enables walkthrough in networked routes by projecting a image clipped corresponding to the position and the direction of the view specified in the route represented as a graph. The method also enables smooth transition at junctions where multiple movie sequences locate by blending two images with alpha calculated from a change of direction.View full abstractDownload PDF (912K) -
Ayako ABE, Shingo YAMADA, Kyohei KOYAMA, Hiroaki FUKUDA, Ikuko SHIMIZUArticle type: Article
Session ID: 3DIT2012-12/HI2012-4
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn these days, many 3D display devices are released and importance of automatic generation of stereoscopic images are growing. We developed a system for stereoscopic image generation using a movie captured static objects by a monocular camera. In this system, an arbitrary depth value is specified by a user and the most suitable image pairs are selected among all possible rectified image pairs by evaluating the rectification error. Blurred images are eliminated from the candidates of image pairs. In addition, if the object is not located on the central region of the image, the image is not suitable and eliminated. Experimental results shows that the efficiency of our system.View full abstractDownload PDF (911K) -
Hiroyuki NAKAGOMI, Kiyosi HOSINOArticle type: Article
Session ID: 3DIT2012-14/HI2012-4
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSTo measure the rotational eye movement that has very small amplitude such as torsional optokinetic nystagmus(tOKN), is required high resolution and precise. The conventional method can keep high precise by modifying the iris pattern reshaped by pupil diameter change. But that measurement is performed at less than 0.5° error always has been difficult. Therefore, We are focused on conjunctiva blood vessels are present in the outer iris is not affected pupil diameter change, and combine traditional method using iris pattern matching and conjunctiva blood vessels extraction method. We suppose fast and precise method of measurement of rotational eye movement.View full abstractDownload PDF (766K) -
Hiroshi ANDOArticle type: Article
Pages 61-64
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes the research on psychophysical and brain activity Imaging technologies for quantitatively evaluating "presence" caused by 3D images, which have been developed in NICT. In particular, we describe the components and factors of presence, human brain activities related to the sense of self-motion when large-field 3D images are shown, and psychophysical evaluation and brain activity imaging on human sense of surface quality, especially glossiness.View full abstractDownload PDF (880K) -
Article type: Appendix
Pages App1-
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (86K) -
Article type: Appendix
Pages App2-
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (86K) -
Article type: Appendix
Pages App3-
Published: February 27, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (86K)
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