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IEEE Symposium on 3D User Interfaces, 3DUI 2009, Lafayette, LA, 14-15 March, 2009; 01/2009
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IEEE Virtual Reality Conference 2009 (VR 2009), 14-18 March 2009, Lafayette, Louisiana, USA, Proceedings; 01/2009
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IEEE Symposium on 3D User Interfaces, 3DUI 2009, Lafayette, LA, 14-15 March, 2009; 01/2009
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Proceedings of the 2006 Conference on Human Factors in Computing Systems, CHI 2006, Montréal, Québec, Canada, April 22-27, 2006; 01/2006
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ABSTRACT: Navigation and manipulation in virtual environments may require up to six degrees of freedom each. Input devices with twelve
or more degrees of freedom can avoid explicit changes between navigation and manipulation and may therefore perform well in
certain situations. However, usability of already existing 12-DOF devices is still unclear. For evaluating such handheld devices,
we developed an extended docking task based on docking tasks designed for examining the usability of 6-DOF devices. In addition
to the usually investigated object manipulation, the task requires navigation. We compared docking performances of two 12-DOF
devices, the CubicMouse and the YoYo. Additionally, performance with a newly developed 12-DOF input device, the SquareBone,
was under study. The SquareBone, a variation of the YoYo idea combined with some potentially beneficial features of the CubicMouse,
provides 2 * 6 elastic DOF which can be controlled simultaneously. The study revealed that the isotonic CubicMouse, although
preferred by novice users, was outperformed by the elastic SquareBone and the YoYo. The new SquareBone was shown to bear the
potential of becoming superior to the YoYo, possibly because it enables simultaneous control of the 2*6 DOF.
09/2005: pages 601-614;
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IEEE Computer Graphics and Applications 26(2):15-9. · 1.41 Impact Factor
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ABSTRACT: This paper reports on the implementation of a multi-user active stereo system based on shuttered LCD projectors. We have successfully implemented shuttering of four projectors to support two individual users with perspective correct stereo views. Our users did not perceive flicker above a refresh rate of 200Hz. Further timing experiments indicate that this approach should also support three or potentially four users.
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ABSTRACT: This paper introduces a simple mechanical three degree of freedom tracking system, which is based on the idea of a spherical coordinate system. Our system measures two angular coordinates and the length of a string. This information is used to compute three-dimensional Cartesian coordinates, which are typically used in virtual environment applications. We integrated this idea of a three-dimensional position tracker into two different setups. Our first setup is a free standing device with a tracked handle. The handle is attached to a separate tracking unit at each end, which provides us with a total of five degrees of freedom. Our second version uses a single tracking unit attached to the shoulder of a user. The string is attached to the wrist of the interacting hand. This setup provides body-referenced three-degrees of freedom tracking, which could be used for HMD-based systems.
