Contact-free wearable 3-D multi-point input system

For several decades, many researches had done to improve user interface. Multi-touch technology is one of the emerging technologies and some products are shown and getting users´ attention in the market. In this paper, we introduce two types of 3-dimensional multi-point input systems of using two-hands in an open space. They were implemented in a form of a wearable computing system for providing users with a contact-free input. One of the wearable systems was implemented using a stereo-camera and infrared emitters, and the other system was implemented using inertial sensors attached to elbow-sleeve type band.