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A Comparison of Ray Pointing Techniques for Very Large Displays

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Author
Jota, Riccardo
Nacenta, Miguel
Jorge, Joaquim
Carpendale, Sheelagh
Greenberg, Saul
Accessioned
2009-09-25T17:30:29Z
Available
2009-09-25T17:30:29Z
Issued
2009-09-25T17:30:29Z
Other
Large displays, ray pointing, distant pointing, image-plane, targeting, tracing, index of difficulty, ISO 9241, parallax
Subject
Information interfaces and presentation (e.g.
HCI)
Type
technical report
Metadata
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Abstract
Ray pointing techniques such as laser pointing have long been proposed as a natural way to interact with large and distant displays. However we still do not understand the differences between ray pointing alternatives and how they are affected by the large size of modern displays. We present a study where four different variants of ray pointing are tested for horizontal targeting, vertical targeting and tracing tasks in a room-sized display that covers a large part of the user‟s field of view. Our goal was to better under-stand two factors: control type and parallax under this sce-nario. The results show that techniques based on rotational control perform better for targeting tasks and techniques with low parallax are best for tracing tasks. This implies that ray pointing techniques must be carefully selected de-pending on the kind of tasks supported by the system. We also present evidence on how a Fitts‟s law analysis based on angles can explain the differences in completion time of tasks better than the standard analysis based on linear width and distance.
Refereed
No
Corporate
University of Calgary
Faculty
Science
Doi
http://dx.doi.org/10.11575/PRISM/30630
Uri
http://hdl.handle.net/1880/47433
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  • Science Research & Publications

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