One important thing required to make a multitouch surface really usable is the surface on which the image from the projector is cast. Without it fingers can be tracked but we just do not get any real feedback underneath them.

Searching the Internet showed that a lot of people decide ...

Looking back to our process of making a multitouch table, the camera seems to be the most delicate part and a source of many (at that time very unfocused) woes.

We started with an old Logitech QuickCam Pro 4000 (or something similar) that we got to play with. Not the ...