Sensing the depth (distance from the surface) of fingers/hands near a tabletop is very important. It allows us to use three-dimensional (3D) gesture interaction in multi-touch applications as we do in the real world. We introduce Z-touch, a multi-touch table that can sense the approximate postures of fingers or hands in the proximity of the tabletop's surface. Z-touch uses a vision-based posture sensing system. Multilay-ered infrared (IR) laser planes are synchronized with shutter signals from a high-speed camera, which captures each layer of the laser images. A depth map is obtained by using the captured image. Our prototype works at ∼30 fps. Z-touch not only uses with the finger/hand contact points but also the angle of the hovering fingers. The interaction with the finger angles is unique and allows users to control multiple parameters by using a single finger. In this study, we introduce the principle of the method of finger detection and its applications (e.g., drawing, map zooming viewer, Bezier curve control). © 2010 ACM.
CITATION STYLE
Takeoka, Y., Miyaki, T., & Rekimoto, J. (2010). Z-touch: An infrastructure for 3D gesture interaction in the proximity of tabletop surfaces. In ACM International Conference on Interactive Tabletops and Surfaces, ITS 2010 (pp. 91–94). https://doi.org/10.1145/1936652.1936668
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