FingMag: Finger Identification Method for Smartwatch

Interacting with a smartwatch is difficult owing to its small touchscreen. A general strategy to overcome the limitations of the small screen is to increase the input vocabulary. A popular approach to do this is to distinguish fingers and assign different functions to them. As a finger identification method for a smartwatch, we propose FingMag, a machine-learning-based method that identifies the finger on the screen with the help of a ring. For this identification, the finger's touch position and the magnetic field from a magnet embedded in the ring are used. In an offline evaluation using data collected from 12 participants, we show that FingMag can identify the finger with an accuracy of 96.21% in stationary geomagnetic conditions.

Park, K. and Lee, G. "FingMag: Finger Identification Method for Smartwatch." Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems. ACM, 2019

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