Synchronous Interfaces for Wearable Computers
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Synchronous interfaces provide a new input modality for wearable devices requiring minimal user learning and calibration. We present SeeSaw, a synchronous gesture interface for commodity smartwatches to support rapid, one-handed input with no additional hardware. Our algorithm introduces methods for minimizing false-trigger events while facilitating fast and expressive input. Results from a live evaluation of the system as a one-handed notification response gesture show comparable speed and accuracy to two-handed touch-based interfaces on smartwatches. The SeeSaw input interaction is also evaluated as an input interface for smartwatches and head-worn display systems, showing that the interface enables rapid and accurate interaction. Thus, we find that the SeeSaw synchronous gesture offers a compelling alternative to existing input methods on wearable computers. Finally, a suite of demo applications are presented to show SeeSaw's support of binary, multi-target, and activation input.