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A Tabletop Projector-camera System for Remote and Nearby Pointing Operation

In this paper, we propose a pointing interface that can be easily installed and that enables remote and nearby operations with high recognition accuracy. We use a system put on a table consisting of multiple projectors and depth cameras. The system projects a shared screen and a personal screen per each user on a projection screen and on a table respectively and enables interaction according to the user's hand motion. A personal screen can be operated by touch operations and a shared screen can be operated by pointing with fingers. Touch and pointing direction are recognized from the depth image and the confidence map obtained by a depth camera. We developed an early prototype system for verification and implemented a presentation application that supports collaborative work to the system. This application allows a user to move a window between the shared screen and the personal screen and to perform various operations on the slides.