Patent ID: 7809171
Filing Date: 2010-10-05
Classification: G06K

Abstract:
1. A method, comprising: providing an electromagnetic radiation emitting device; providing at least one electromagnetic radiation receiving device; directing multiple wavelengths of electromagnetic radiation from the electromagnetic emitting device to scan a face of a person; detecting at least one of the wavelengths reflected by a first portion of an eye of the person with the at least one electromagnetic radiation receiving device to establish a first signal; detecting at least one other of the wavelengths reflected by a second portion of the eye through a pupil thereof with the at least one electromagnetic radiation receiving device to establish a second signal, the second portion being behind and interior to the first portion; and determining a location of the eye relative to one or more facial features as a function of the first signal and the second signal, the first signal and the second signal being indicative of a distance separating the first portion and the second portion, wherein the first signal is determined as a function of a first phase shift representative of a range to the first portion, the second signal is determined as a function of a second phase shift representative of range to the second portion, and wherein the act of determining the location of the eye includes finding a difference between the first range and the second range to provide a value, and comparing the value to a threshold amount indicative of eye location.