Abstract:

Projectors have traditionally been used as fixed devices making fixed displays. But projector dimensions are shrinking and projectors are just now on the threshold of being compact enough for handheld use. Should handheld projection prove viable, it offers revolutionary new possibilities for display, with opportunistic projection onto nearby surfaces like walls and tabletops to create a display wherever needed. But there is a missing element here. Personal projection involving only passive viewing is of limited use, and it needs a mechanism for interaction to be truly versatile. Consider how viewing an electronic diary would be almost useless without selection and scrolling. Existing UI solutions for handheld devices don't obviously translate to a handheld projector. Our work attempts to address this, and we describe a recently introduced technique to demonstrate how familiar mouse-interactions can be done in the context of handheld projection, and via a natural single-handed pointing motion of the projector. We show how interactive projection supports both traditional applications in a new medium, and also novel applications.