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Article type: Cover
2008 Volume 13 Issue 3 Pages
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Published: September 30, 2008
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Article type: Index
2008 Volume 13 Issue 3 Pages
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Published: September 30, 2008
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Article type: Index
2008 Volume 13 Issue 3 Pages
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Published: September 30, 2008
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Tetsuro Ogi, Yasuyuki Yanagida, Taro Maeda
Article type: Article
2008 Volume 13 Issue 3 Pages
313-
Published: September 30, 2008
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Article type: Appendix
2008 Volume 13 Issue 3 Pages
314-
Published: September 30, 2008
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Yoshihiro Kosaka, Yuzuru Isoda, Akihiro Tsukamoto, Takuya Okumura, Sus ...
Article type: Article
2008 Volume 13 Issue 3 Pages
315-323
Published: September 30, 2008
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This paper explores a method of creating large-scale urban 3D models from GIS spatial data. It is capable of cost-effectively creating realistic VR models based on existing GIS data. Parametric 3D models of houses are created from polygon data, fences from line data, and pedestrians and trees from point data. The method is applied to the project 'Virtual Kyoto Time-Space' in which the whole city of Kyoto of the Edo era is re-created.
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Shinhichi Tanahashi, Hiroaki Yano, Hiroo Iwata
Article type: Article
2008 Volume 13 Issue 3 Pages
325-332
Published: September 30, 2008
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The "SpinDome" is an image display using wide-angle spherical screen. Sphere is an ideal shape of a screen that covers human visual field. The optical system of the SpinDome employs two mirrors: a flat mirror and a spherical convex mirror. The flat mirror bends the light so that the viewer can see the image from the center of the spherical screen. This optical configuration enables seamless wide-angle image in a very limited space. A rotary mechanical shutter is set in front of the projectors, which provides stereoscopic image. Effectiveness of the display is exemplified by maneuvering a remote vehicle.
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Hiroo Iwata
Article type: Article
2008 Volume 13 Issue 3 Pages
333-341
Published: September 30, 2008
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Visual immersion plays an important roll in virtual environment. This paper describes development of a rear-projection immersive spherical display. It has ability to display a panoramic image in omni-direction. Rear-projection screen has advantage in contrast of the image. The prototype display was compared with a front projected immersive spherical display named "Ensphered Vision." As a result, degradation of contrast due to an internal reflection of the projected image is significantly improved in this rear-projection display. This paper presents history and current research activities of the rear-projection full-Surround spherical display.
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Kensei Jo, Kouta Minamizawa, Hideaki Nii, Naoki Kawakami, Susumu Tachi
Article type: Article
2008 Volume 13 Issue 3 Pages
343-352
Published: September 30, 2008
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The goal of this study is to render immersive stereoscopic images in real time for realization of interactive CG worlds. In our proposed method, the vertices are moved to their corresponding locations by using a vertex shader according to the geometry of the display. Next, the polygons are subdivided by a geometry shader in order to reduce distortions. This method enables fast rendering of immersive stereoscopic images with less distortion. Furthermore, the rendering feature that transform verteces data for immersive stereoscopic displays is implemented on GPU. This implies that the method allows CG creators to create contents using typical 3D CG APIs without considering the display's geometries.
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Nobuaki Kato, Kensei Jo, Kouta Minamizawa, Hideaki Nii, Naoki Kawakami ...
Article type: Article
2008 Volume 13 Issue 3 Pages
353-362
Published: September 30, 2008
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This paper reports a novel camera system that captures immersive 3D motion pictures in real time for a telexistence environment. The system is composed of eight pairs of cameras placed densely to cover all field of view, in order to reconstruct stereoscopic visual field for observers, taking the physical constraints of human vision system into account. The developed system fully satisfied the requirements to archive visual telexistence: the system can present panoramic and stereoscopic motion images interactivity. We showed an application in which the proposed image-capture system was applied to the immersive visual display TWISTER and an experiment of visual telexistence was put into practice.
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Shinya Minatani, Itaru Kitahara, Yoshinari Kameda, Yuichi Ohta
Article type: Article
2008 Volume 13 Issue 3 Pages
363-373
Published: September 30, 2008
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This paper proposes "Remote Shared Mixed-Reality" that enables multiple users in distant places to share a same Mixed-Reality space. In this paper, we propose a novel face-to-face tabletop type remote collaboration system to share the same tabletop MR space by two users sitting in distant places. In order to realize the system, the system has to execute the all processes, capturing, sending, and rendering the appearance of users, real/virtual objects in real time.
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Erika Sawada, Tatsuhito Awaji, Keisuke Morishita, Masahiro Furukawa, T ...
Article type: Article
2008 Volume 13 Issue 3 Pages
375-383
Published: September 30, 2008
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This system is an interface realized with the symbiosis of the input/output of wind and graphics. This system brings the new communication medium of "wind" into the bidirectional interaction between the virtual environment and the real environment by integrating the graphic presentation with the input and output of wind on a special screen. The user can interact with the virtual environment in the screen through his/her breath and wind emission. Conversely, actions from the virtual environment to the user are performed by wind changing dynamically. As a result, the user can share not only sights and sounds but also the cutaneous sensation by wind with the system, and interact with the virtual environment feeling a non-conventional deep relationship.
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Yusuke Isobe, Kinya Fujita
Article type: Article
2008 Volume 13 Issue 3 Pages
385-391
Published: September 30, 2008
Released on J-STAGE: February 01, 2017
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The influences of visual target and predictive visual cue on gaze behavior and cybersickness were experimentally evaluated, in order to maintain the presence and reduce the cybersickness. The severity of sickness and the sense of velocity were evaluated using simulator sickness questionnaire and method of reproduction. The eye movement was also monitored using an eye tracking camera. The results suggested that the visual target at the optical flow center has more cybersickness reduction effect than the fixed visual target, and the predictive visual cue increases the reduction effect of the target further, while the sense of velocity does not significantly differs among the visual conditions. The feasibility was suggested that presenting predictive visual cue via visual target can reduce cybersickness without impairing sense of velocity.
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Masato Takahashi, Hiroya Tanaka
Article type: Article
2008 Volume 13 Issue 3 Pages
393-399
Published: September 30, 2008
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We developed an installation work group "bogs" making use of artificial muscle and prosthetic skin for the realization of the organic sense of being alive. Some of them have features of the "haptic interface" covered with the soft material imitated human skin and the "kinetic art work" making use of technology of the soft actuator as the motive energy. They also act as musical interfaces generating not clear sounds but virtual voices through the simulation of human vocal cords with formant synthesis. The users experience a virtual space where unknown animate beings appealing to the eye, the ear and the sense of touch live by interacting with bogs. In this case, bogs seem to be sprites lurking in our living and they broaden our minds.
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Toyonori Fujiura, Youichi Kurokawa, Yutaka Ishibashi
Article type: Article
2008 Volume 13 Issue 3 Pages
401-408
Published: September 30, 2008
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In this paper, we propose communication schemes using error control based on importance for remote haptic instruction systems in which an instructor trains a learner at a remote location how to write characters or draw figures while conveying the sense of force. The schemes carry out error control only over important media units (MUs) which include the position information in the case where the speed of the brush stroke is faster than a threshold value. For the error control, we adopt Replication, which sends each MU twice, Forward Error Correction (FEC) with XOR calculation or Reed-Solomon coding, and so on. By subjective assessment, we demonstrate the effectiveness of the proposed schemes.
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Article type: Appendix
2008 Volume 13 Issue 3 Pages
409-411
Published: September 30, 2008
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Article type: Appendix
2008 Volume 13 Issue 3 Pages
App1-
Published: September 30, 2008
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Article type: Cover
2008 Volume 13 Issue 3 Pages
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Published: September 30, 2008
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