The Perceptual Window: Head Motion as a New Input Stream

We introduce a novel interaction technique using head motions to control the location of a window viewpoint within its document space. Head motion is acquired by a non-intrusive head-tracker using computer vision. The tracking technique used in the system, namely correlation matching, is described in order to exhibit its strengths and weaknesses in the context of tightly coupled interaction. The output of the tracker is used in both a rate control interaction and a position control interaction. The benefit is demonstrated by two user studies built around two common GUI tasks: navigating in a two-dimensional document space, and moving an object from one place to another in a document. Our system, The Perceptual Window, allows significant improvements in task completion time after a short learning period.