Floagent: Interaction with Mid-Air Image via Hidden Sensors

This paper proposes Floagent as a human-computer interaction system that displays images in mid-air using infrared light reflected by a hot mirror. Floagent is an interaction system that allows users to focus on mid-air images without being aware of the sensors. By combining a hot mirror and a retroreflective transmissive optical element, Floagent conceals the camera from the user without affecting the mid-air image. We investigated the touch input interactions accuracy with mid-air images to evaluate the proposed system. The results show that the proposed system can effectively measure user input. Floagent enables an interaction design with a hidden sensor in which mid-air images appear to respond spontaneously to a wide variety of interaction events.