1. A method for determining the position of an object on a touch sensitive display, the method comprising: receiving a set of reference templates, each reference template comprising data associated with an actuation signal initiated by a reference object touching the touch sensitive display; receiving a first actuation signal, the first actuation signal associated with a touch produced by a first object upon the touch sensitive display; determining whether the first actuation signal meets a desired local maximum signal value; if the first actuation signal meets a desired local maximum signal value, determining a set of boundary points substantially near the first actuation signal; receiving sensor data from the set of boundary points; and calculating a position of the first object; and wherein calculating the position further comprises computing a set of inverse functions from the set of boundary points, the set of inverse functions comprising a set of inverse finger response functions.