Pre-Screen Projection: From Concept to Testing of a New Interaction Technique

Pre-screen projection is a new interaction technique that allows a user to pan and zoom integrally through a scene simply by moving his or her head relative to the screen. The underlying concept is based on real-world visual perception, namely, the fact that a person’s view changes as the head moves. Pre-screen projection tracks a user’s head in three dimensions and alters the display on the screen relative to head position, giving a natural perspective effect in response to a user’s head movements. Specifically, projection of a virtual scene is calculated as if the scene were in front of the screen. As a result, the visible scene displayed on the physical screen expands (zooms) dramatically as a user moves nearer. This is analogous to the real world, where the nearer an object is, the more rapidly it visually expands as a person moves toward it. Further, with pre-screen projection a user can navigate (pan and zoom) around a scene integrally, as one unified activity, rather than...

• Type: Conference
• Year: 1995
• Where: CHI
• Authors: Deborah Hix, James N. Templeman, Robert J. K. Jacob
• Keywords: CHI 1995, Human Computer Interaction, Pre-screen Projection, User’s Head, User’s Head Movements