How Does a Virtual Keyboard Work

Image by momentimedia via Flickr

I have been curious about operating principles of virtual keyboards. Today I found a paper illustraing their mechanism.

H. Du, T. Oggier, F. Lustenberger, and E. Charbon, “A virtual keyboard based on true-3D optical ranging,” British Machine Vision Conference, Citeseer, 2005, pp. 220–229.

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