ABSTRACT
Portable handheld devices inherently involve difficulties with methods of input due to their compact size. Several approaches to attach extra sensors have been proposed, but these have not enabled size or exterior design to be minimized. We propose a novel and simple input technique for handheld devices that makes use of a stylus in a holder that is twisted and pushed/pulled like a knob. Both rotating and sliding the stylus inside the holder can simultaneously adjust two parameters. We implemented a prototype system with an inexpensive image sensor, and evaluated its input. An ANOVA test revealed that our method could scroll as fast as tap-and-drag operations on a screen.
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Index Terms
- RodDirect: two-dimensional input with stylus knob
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