Selecting and moving digital content on interactive tab-letops often involves accessing the workspace beyond arm's reach. We present Pointable, an in-air, bimanual perspective-based interaction technique that augments touch input on a tabletop for distant content. With Pointable, the dominant hand selects remote targets, while the non-dominant hand can scale and rotate targets with a dynamic C/D gain. We conducted 3 experiments; the first showed that pointing at a distance using Pointable has a Fitts' law throughput comparable to that of a mouse. In the second experiment, we found that Pointable had the same performance as multi-touch input in a resize, rotate and drag task. In a third study, we observed that when given the choice, over 75% of participants preferred to use Pointable over multi-touch for target manipulation. In general, Pointable allows users to manipulate out-of-reach targets, without loss of performance, while minimizing the need to lean, stand up, or involve collocated collaborators.

Additional Metadata
Keywords Input device, Interaction technique, Multi-touch, Remote interaction, Tabletop
Persistent URL dx.doi.org/10.1145/2076354.2076357
Conference ACM International Conference on Interactive Tabletops and Surfaces, ITS 2011
Citation
Banerjee, A. (Amartya), Burstyn, J. (Jesse), Girouard, A, & Vertegaal, R. (Roel). (2011). Pointable: An in-air pointing technique to manipulate out-of-reach targets on tabletops. In Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces, ITS'11 (pp. 11–20). doi:10.1145/2076354.2076357