A camera-based interface for interaction with mobile handheld computers
Proceedings of the 2005 symposium on Interactive 3D graphics and games
An intuitive interface based on camera parameters for portable devices
ACM SIGGRAPH 2006 Research posters
MagGetz: customizable passive tangible controllers on and around conventional mobile devices
Proceedings of the 26th annual ACM symposium on User interface software and technology
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This paper proposes a novel easy-to-use camera-based tangible controller for cellular phone applications. It realizes continuous analog input by tracking a marker at the top end of a controller device attached to the embedded camera. In contrast to the conventional keypad which enables limited operability to four discrete directions, the proposed controller brings not only an unconstrained continuous input to arbitrary directions but also continuous input for depth and for a rotation angle. In order to evaluate operability, we conducted a user experiment of time trial for path tracing, and the results showed that the subjects completed the task with the proposed controller in 27.9% less than with the conventional keypad input.