Turn any surface into a touchscreen (photos)

OmniTouch is designed to be wearable. The prototype is a shoulder-mounted device made up of a laser-based pico projector and a depth-sensing camera, similar to that found in the Microsoft Kinect.

The OmniTouch uses the depth-sensing camera to build a graphical model of the world which allows it to calculate how far away objects are. The system's software can recognize fingers, and a depth map allows it to determine whether a finger is touching a surface. When a finger touches a surface onto which an interface is projected, users can interact with the screen, clicking buttons or dragging icons, in the same way they would with any other touchscreen.

Photo: Microsoft Research/CMU

The ability of the system to track finger movements allows it to support a wide range of gestures, such as drawing with fingers, as seen here.

Photo: Microsoft Research/CMU

Because the system can trace the movement of fingers on any surface, it can be set up to recognize gestures such as pinch-zooming on a map.

Microsoft Research Redmond researcher Hrvoje Benko said in a statement: "We wanted the ability to use any surface.

"Let the user define the area where they want the interface to be, and have the system do its best to track it frame to frame. This creates a highly flexible, on-demand user interface."

Photo: Microsoft Research/CMU

Another potential use for OmniTouch is tracking the movement of fingers to highlight text in a printed document.

Photo: Microsoft Research/CMU

In this picture, the user is selecting apps from a menu on his hand which are then run on the interface projected onto the table.

Photo: Microsoft Research/CMU

Researchers say the wearable shoulder-mounted prototype could be reduced to a matchbox-sized device that could be worn on a watch or a pendant.

Photo: Microsoft Research/CMU

A shot showing how the system recognises and traces fingers.

Photo: Microsoft Research/CMU