Patent ID: 8446389

Claim:
A method, comprising: utilizing two infrared lasers to generate a plane of infrared light above a surface to transform said surface into a virtual touchscreen; capturing, with a first infrared camera, a first group of infrared light reflected from an object breaking said plane of infrared light at a plurality of known positions on said surface, respectively, wherein said known positions correspond to a plurality of keys of a keyboard; capturing, with a second infrared camera, a second group of infrared light reflected from said object breaking said plane of infrared light at said plurality of known positions on said surface, respectively; and correlating said first and second groups of infrared light reflections and said plurality of known positions to provide a two-dimensional position for said object, wherein said two-dimensional position is calibrated with respect to said surface, wherein said correlating further includes: performing a first polynomial regression to determine a first set of coefficients for a first Taylor series expansion of a first coordinate of said two dimensional position; and performing a second polynomial regression to determine a second set of coefficients for a second Taylor series expansion of a second coordinate of said two dimensional position.