| Summary: | 碩士 === 國立臺灣大學 === 資訊工程學研究所 === 103 === This paper presents DigitSpace, a thumb-to-fingers touch interface sup- porting one-handed and eyes-free input. The thumb-to-fingers actions involve solely single hand and very low motion cost, thus providing way high avail- ability. However, previous works mainly focus on the sensing techniques, the proper design of thumb-to-fingers touch interface remains unknown. This paper explores the interfaces of two thumb-to-fingers touch inputs, touch and gesture, by considering both ergonomics and precision.
Our first study recognized the segments of fingers containing acceptable physical comfort. Based on the comfort regions, we further evaluated the participants’ ability of performing touch and unistroke gesture input in the following two studies. The results indicate that within the comfort regions, the participants could perfectly distinguish at least 16 positions on the fingers, and perform the eyes-free Graffiti input with 92% accuracy. Based on the design implications from the observations, we proposed HallFingers, as a proof-of-concept prototype, to demonstrate the benefits of thumb-to-fingers touch interface.
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