Doodle Space: Painting on a Public Display by Cam-phone

摘要

In this paper, we present a novel interactive application on public displays, Doodle Space, which allows multiple participants collaboratively painting 3D curve on a projected wall using personal camera phones. An image sequence based algorithm is used to estimate the movement parameters of cam-phones. Users' cam-phone holding hand's gesture is recognized and monitored in real time which allows users to control a virtual brush naturally by moving their phones in the air. A wireless transmission mechanism based on Bluetooth protocol is implemented to build movement parameters transmission channel between phones and server PC. A 3D drawing scheme is designed to construct 3D curve with movement parameters on the display. People could not only doodle but also manipulate their doodles by dragging, rotation and zoom which are indispensable for true drawing. User studies are applied to testify and improve doodle space's feasibility and entertainment.