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Article type: Cover
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Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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Article type: Index
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Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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Hiroyasu UJIKE, Hiroshi WATANABE
Article type: Article
Session ID: 3DIT2014-17/HI2014-4
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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The effect of binocular disparity range and interocular crosstalk on visual fatigue was investigated by presenting the combination of those factors (three ranges of binocular disparity and four different interocular crosstalk). Observers continued to watch those stereoscopic images for approx. 10 minutes for each combination while performing visual search tasks with the images. The correct ratio of the task was almost 1.0; the search time, the subjective score of uncomfortability every two minutes and the score of visual fatigue questionnaire was larger for larger values of binocular disparity range and interocular crosstalk.
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Hiroshi WATANABE, Hiroyasu UJIKE
Article type: Article
Session ID: 3DIT2014-18/HI2014-4
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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One of the major factors of visual fatigue which stereoscopic images provides is considered to be the issue of interocular discrepancy. The issue 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 under different disparity range.
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Masaro KOGURE
Article type: Article
Session ID: 3DIT2014-19/HI2014-4
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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Bayer MaterialScience (BMS) has been developing market for Bayfol[○!R] HX, photopolymer film for volume hologram, in imaging and security areas since 2010. The material development has simultaneously been promoted so that Bayfol[○!R] HX should be adopted as holographic optical elements in optical/electronics devices. The basic configuration, characteristics and developmental status of the Bayer photopolymer film are introduced in this paper.
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Sho HIRAYAMA, Yasuhiro TAKAKI
Article type: Article
Session ID: 3DIT2014-20/HI2014-4
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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A 360-degree table-screen 3D display using small array of high-speed projectors has been proposed. The display system employing converging rays was already demonstrated. Prior to this small array of high-speed projector system, a high-speed projector system and a projector array system were used to construct the 360-degree table-screen 3D displays, which employed parallel rays and diverging rays to produce 360-degree 3D images. In this study, the display system using a small array of high-speed projectors is constructed, which can produce 360-degree 3D images employing converging rays, parallel rays, or diverging rays.
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Toshiki TAKAHASHI, Yasuhiro TAKAKI
Article type: Article
Session ID: 3DIT2014-21/HI2014-4
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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We already proposed a 360-degree 3D display using small array of high-speed projectors. The error diffusion technique has been adopted in order to improve grayscale representation since the projectors in our system can generate only binary images. However, with this technique, the system has low grayscale representation and resolution. In this study, we propose the technique using the bit-plane decomposition and the intensity modulation of illumination light. Bit-plane images are generated by decomposing three-dimensional images and then displayed to succeeding multiple viewpoints. At the same time, the illumination light is modulated corresponding to the bit-levels. The width of viewpoints should be larger than the interval of viewpoints such that the viewpoints for the same bit-level can be observed continuously. We realized the grayscale representation without decreasing the resolution.
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Toshiya MORITA, Hiroshi ANDO
Article type: Article
Session ID: 3DIT2014-22/HI2014-4
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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To survey the present situation of fatigue caused by watching 3DTV, the degree of fatigue after watching 3D contents for one hour with commercially available 3DTV that requires use of shutter glasses was evaluated in various viewing conditions for 500 adult and 131 minor participants. As a result, there were differences in the sensation of fatigue of adult participants between conditions with and without glasses and between viewing positions. On the other hand, there was no difference in the sensation of fatigue of minor participants between viewing conditions and their degree of fatigue tended to be higher than in adult.
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Haruki MIZUSHINA, Hiroshi ANDO
Article type: Article
Session ID: 3DIT2014-23/HI2014-5
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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There are great differences between individual in visual discomfort caused by viewing stereoscopic images. In this study, we hypothesized that individual differences in the disparity range for comfortable viewing of stereoscopic images relate to those in the visual function. The results suggest that the subjects with narrower pupil distance, higher visual acuity of dominant eye, and higher stimulus AC/A ratio showed narrower disparity range for comfortable viewing of stereoscopic images. The individual differences in accommodation responses to real objects and stereoscopic images were not correlated to the individual differences in the disparity range for comfortable viewing of stereoscopic images.
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Hitoshi HIURA, Takayuki YAMASHITA, Jun ARAI
Article type: Article
Session ID: 3DIT2014-24/HI2014-5
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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Integral photography technique captures and reconstructs the same light field of light that is emitted from objects. The light field of the objects are obtained by an objective lens, a lens array and a image sensor. The size of lens array and image sensor can be considered as the factors restricting the capturing area of the light field. To expand the capturing area of the light field, we have developed an experimental setup with two imaging units. The imaging unit consists of an image sensor and a lens array. Two imaging units were set to each position by using a prism. The output images were combined together by signal processing with signal level compensation and gap interpolation. As a result, we confirmed that the light field was expanded by the experimental setup.
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Mao MAKINO, Hiroshi ANDO, Masato OKUI, Naomi INOUE
Article type: Article
Session ID: 3DIT2014-25/HI2014-5
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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We are conducting research on super multi-view 3D video systems for highly realistic communications. We developed a glasses-free auto-multiscopic 3D display, and a 3D capturing system to capture live real moving objects. Since the spring of 2013, we started several field experiments in a public space with this system. The place is GRAND FRONT OSAKA, located on the north side of JR Osaka station. In this study, we report on the analysis of audience's behavior and audience's evaluation of the 3D contents on an auto-multiscopic display, in the public space.
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Wataru FUJIMURA, Yukua KOIDE, Genki KUNITOMI, Hiroki TAGUCHI, Hisataka ...
Article type: Article
Session ID: 3DIT2014-26/HI2014-5
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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This article reports about an application technique which can realize 2D/3D hybrid display using multiplex-hidden imagery. In the experiment, it evaluated better image quality for various user and environments.
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Yukua KOIDE, Wataru FUJIMURA, Genki KUNITOMI, Hiroki TAGUCHI, Hisataka ...
Article type: Article
Session ID: 3DIT2014-27/HI2014-5
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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ITE This article contributes about realization of multiplex technology which has compatibility with current three dimentional display. It contains a prototype of liquid crystal flat panel by a line-by-line method as a latest realization of multiplex-hidden imagery.
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Hirofumi Mochizuki, Shun'ichi Tano, Tomonori Hashiyama, Junko Ich ...
Article type: Article
Session ID: 3DIT2014-28/HI2014-5
Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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In order to realize VR and AR, it is important to measure the positions in 3D space. However, the conventional methods require the installation of large-scale apparatus or many cameras. Our laboratory proposed a 3D positioning architecture UbiC3Dwhich uses only a single camera with multiple sensors. It is expected to apply UbiC3D to many systems which need to measure the positions in 3D space, but the detailed algorithm has not been realized yet. In this paper, we will propose the basic 3D map matching algorithm for UbiC3D.
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Article type: Appendix
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Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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Article type: Appendix
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Published: February 27, 2014
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Article type: Appendix
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Published: February 27, 2014
Released on J-STAGE: September 21, 2017
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