The 4th ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia
Conference 12-15 December • Exhibition 13-15 December • Hong Kong Convention & Exhibition Centre

Emerging Technologies

SonarWatch: Appropriating the Forearm as a Slider Bar

Human bodies have recently become an emerging type of human-computer interfaces. Not only is our skin a surface that is always available and highly accessible, but also the sense of how our body is configured in space allows us to accurately interact with our bodies in an eye-free manner. Hence, this input method is suitable to be applied on extending the interaction space of mobile devices like Skinput [Harrison et al. 2010] or providing more degrees-of-freedom for enhancing gaming experiences such as Kinect. Nevertheless, since the additional gesture detector may be obtrusive or not so portable for users, this approach can hardly be applied to everyday life.
This work presents SonarWatch, a less-obtrusive, wearable gesture detector. Unlike the device introduced by Nakatsuma et al. [2011], we equipped an ultrasonic rangefinder and a capacitive touch sensor on a wristwatch, so a user's forearm can be appropriated as a readily available input surface for interacting with computers. Several click and slide gestures are allowed to be performed by the user. To demonstrate the possible applications and the effectiveness of this implicit design, three applications are provided: photo browsing, music playlist controlling and augmenting Kinect for gaming.

Rong-Hao Liang, Academia Sinica
Shu-Yang Lin, National Taiwan University
Chao-Huai Su, National Taiwan University
Kai-Yin Cheng, National Taiwan University
Bing-Yu Chen, National Taiwan University
De-Nian Yang, Academia Sinica