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Authors:Ali Alavi: t2i Lab, Chalmers, Sweden
Brice Clocher: t2i Lab, Chalmers, Sweden
Allen Smith: t2i Lab, Chalmers, Sweden
Andreas Kunz: ICVR, ETH, Switzerland
Morten Fjeld: t2i Lab, Chalmers, Sweden
Publication title:Multi-State Device Tracking for Tangible Tabletops
Conference:Proceedings of SIGRAD 2011. Evaluations of Graphics and Visualization — Efficiency, Usefulness, Accessibility, Usability, November 17–18, 2011, KTH, Stockholm, Sweden
Publication type: Abstract and Fulltext
Issue:065
Article No.:014
Abstract:On tangible tabletops, Tangible User Interfaces (TUIs) can signalize their identity, position, orientation, and state by active infrared light. This provides rich interaction capabilities in complex, dynamic scenarios. If TUIs have to transfer additional high-resolution information, many bits are required for each update. This has a negative impact on the overall update rate of the system. In the first part of this paper, we present an in-house map application where interaction with time-dependent contour lines may benefit from high-resolution TUI states. Prototypical TUI concepts such as slider, ruler, and dials further motivate the benefit of high-resolution tracking. In the second part of the paper, we depart from a device tracking overview and then show how tangible devices for tabletops typically use infrared (IR) emitters and a camera to send information about their position, orientation, and state. Since transferring many additional information bits via a normal camera-based tabletop system is not feasible anymore, we introduce next a new system setup that still offers a sufficiently high update rate for a smooth interaction. The new method can be realized as a tabletop system using a low-cost camera detecting position, combined with a low-cost infrared receiver detecting the state of each device. Since both kinds of sensors are used simultaneously we call the method “dual mode.” This method combines a camera-based tracking with the possibility to transfer an almost unlimited amount of states for each device.
Language:English
Keywords:Active tangible devices, tabletop, dual mode, IR tracking, multiple TUI
Year:2011
No. of pages:5
Pages:99-103
ISBN:978-91-7393-008-6
Series:Linköping Electronic Conference Proceedings
ISSN (print):1650-3686
ISSN (online):1650-3740
File:http://www.ep.liu.se/ecp/065/014/ecp11065014.pdf
Available:2011-11-21
Publisher:Linköping University Electronic Press, Linköpings universitet

REFERENCE TO THIS PAGE
Ali Alavi, Brice Clocher, Allen Smith, Andreas Kunz, Morten Fjeld (2011). Multi-State Device Tracking for Tangible Tabletops, Proceedings of SIGRAD 2011. Evaluations of Graphics and Visualization — Efficiency, Usefulness, Accessibility, Usability, November 17–18, 2011, KTH, Stockholm, Sweden http://www.ep.liu.se/ecp_article/index.en.aspx?issue=065;article=014 (accessed 7/31/2014)