A projection-based approach for clarifying interaction partners in human-robot communication

Robots provide a variety of services in daily life spaces, making human-robot interaction essential. This research proposes a new projection-based method for non-humanoid robots to engage with people. While significant research has explored the use of human-like gestures in humanoid robots to initiate interaction, applying such approaches to non-humanoid robots is challenging in conveying the sense that the robot is addressing the person directly. In this study, we introduce a method where a projector mounted on the robot illuminates the area around both the robot and the partners it is addressing, enhancing the interaction clarity and participation. Experiments conducted in two scenarios demonstrated that the proposed method effectively conveyed the feeling of being directly addressed by the robot and fostered a sense of easy participation, even for those not actively participating.