1. A method for calibration of a capacitive touch digitizer system, the method comprising: detecting patterns of signals from a plurality of different events over a course of user interaction with the digitizer system, wherein the patterns of signals are outputs from a digitizer sensor of the system; determining a number of times that a pattern of signals is repeated over the different events; and defining a map of offset values as a pattern of signals that is repeated above a pre-defined repetition threshold.