RubFinger: A Wristworn Controller that Detects Aerial Rubbing Actions by Bare Fingers
Haichao Zhu, Fukumoto Masaaki




RubFinger is a novel device that can realize full-time wearable input by detecting aerial rubbing and tapping gestures of the thumb and index fingers. It uses only one small contact microphone mounted on the wrist; nothing needs to be attached on the hand or fingers. Therefore it does not interfere with daily life activities. A Hidden Markov Model (HMM) based classifier can recognize two rubbing gestures of UP and DOWN, as well as a tapping gesture of TAP with an accuracy of 97.3% under user dependent conditions. The "true one hand" operation is also realized when RubFinger is combined with wrist mounted wearables such as smartwatches.

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This paper was completed by me and advised by Fukumoto san. The paper of this project was rejected by CHI2015.