A pointing device in a computer system is automatically calibrated by distinguishing between “in presence” and “out of presence” conditions. Calibration correction accommodates differing geometry of users' hands and fingers. Thus, the “natural” “home” position may be different for left-handers...http://www.google.com/patents/US7289107?utm_source=gb-gplus-sharePatent US7289107 - Auto-calibration of pointing devices used in a computer user interface
