ISWC '00 Proceedings of the 4th IEEE International Symposium on Wearable Computers
Quickdraw: the impact of mobility and on-body placement on device access time
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
SideSight: multi-"touch" interaction around small devices
Proceedings of the 21st annual ACM symposium on User interface software and technology
Hambone: A Bio-Acoustic Gesture Interface
ISWC '07 Proceedings of the 2007 11th IEEE International Symposium on Wearable Computers
Abracadabra: wireless, high-precision, and unpowered finger input for very small mobile devices
Proceedings of the 22nd annual ACM symposium on User interface software and technology
Enabling always-available input with muscle-computer interfaces
Proceedings of the 22nd annual ACM symposium on User interface software and technology
ISWC '09 Proceedings of the 2009 International Symposium on Wearable Computers
Skinput: appropriating the body as an input surface
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Nenya: subtle and eyes-free mobile input with a magnetically-tracked finger ring
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
OmniTouch: wearable multitouch interaction everywhere
Proceedings of the 24th annual ACM symposium on User interface software and technology
Airwriting: demonstrating mobile text input by 3D-space handwriting
Proceedings of the 2012 ACM international conference on Intelligent User Interfaces
Digits: freehand 3D interactions anywhere using a wrist-worn gloveless sensor
Proceedings of the 25th annual ACM symposium on User interface software and technology
GaussSense: attachable stylus sensing using magnetic sensor grid
Proceedings of the 25th annual ACM symposium on User interface software and technology
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While much progress has been made in wearable computing in recent years, input techniques remain a key challenge. In this paper, we introduce uTrack, a technique to convert the thumb and fingers into a 3D input system using magnetic field (MF) sensing. A user wears a pair of magnetometers on the back of their fingers and a permanent magnet affixed to the back of the thumb. By moving the thumb across the fingers, we obtain a continuous input stream that can be used for 3D pointing. Specifically, our novel algorithm calculates the magnet's 3D position and tilt angle directly from the sensor readings. We evaluated uTrack as an input device, showing an average tracking accuracy of 4.84 mm in 3D space - sufficient for subtle interaction. We also demonstrate a real-time prototype and example applications allowing users to interact with the computer using 3D finger input.