Multi-User Laser-Based Interaction
on Large Tiled Displays
James Davis, Xing Chen
technology has made large tiled displays an exciting feature of advanced
visualization systems. However, one challenge to using such systems
effectively is the development of input technologies that comfortably
allow collaborative interaction with the displayed data on these large
surfaces. We have developed an input system that allows any number of
users to interact simultaneously with data on a large display surface. In
this system, each user utilizes a laser pointer as a pen or pointing
device. Using computer vision techniques, the system determines the
beginning, continuation, and end of all currently active pointer strokes.
The coordinates of each stroke are available for use by visualization
applications. This system scales well with display size, display
resolution, and number of users.