nextuppreviouscontents
Next:Haptic Rendering of Images Up:Human-Computer Interaction Previous:Improved Web-based Pedagogical Tools

Graffiti Board

The GraffitiBoard is a wall-sized computer display that tracks the position of a pointer (such as a user's finger) and displays the resulting penstrokes as if the user were writing on the wall. A video projector produces the displayed image while a video camera captures the users' actions.

By applying a simple colour tracking algorithm or a more complex cross-correlation technique, it is possible to recognize certain actions and respond accordingly. For example, if the user's hand is placed on the wall, a palette with various painting options can be generated at that location. For our demonstration program, we use both colour tracking and correlation techniques to track the movement of user's finger and draw pictures and letters.

W. Lim, J. Cooperstock
 


Annual Report

Mon Jun 26 21:22:20 GMT 2000