MirrorSpace includes a proximity sensor that
measures the distance to the closest object or person
in front of it. A blur filter is applied on the
images to visually express a distance computed
from the local and remote sensor values. Blurring
distant objects and people lets the up-close viewer
perceive distant movement or passing with minimum
involvement. It also offers a simple way of
initiating or avoiding a change to a more engaged
form of communication by simply moving closer
(see Figure 3) or farther away.