Via KurzweilAI.net — um, what’s to say here. This is just amazingly cool. Can’t say the tech is totally there from a user standpoint — one commenter mentioned the lag time would be disconcerting at this stage of technology — but the proof-of-concept is utterly amazing.
An invisible computer mouse
MIT Media Lab researchers have developed Mouseless, an invisible computer mouse that costs about $20 to build.
It uses an infrared (IR) laser beam and an infrared camera. The laser beam module creates a plane of IR laser just above the surface the computer sits on. The user cups their hand, and the laser beam lights up the hand that is in contact with the surface. The IR camera detects those bright IR blobs using computer vision. The change in the position and arrangements of these blobs are interpreted as mouse cursor movement and mouse clicks.
More info: Fluid Interfaces Group | MIT Media Lab
Here’s a video of the no-mouse mouse in action (feel free to ignore the attempt at cleverness with the Tom and Jerry cartoon intro.)