Patent ID: 7538744

Claim:
A computerized method for determining the point a person is gazing comprising the following steps: illuminating an eye of a first user with a light source to produce a corneal reflection from the eye, using a camera to convert the corneal reflection from the eye of the first user into a two-dimensional image, determining from the two-dimension image the position of the corneal reflection from the eye of the first user for each of a first plurality of points the first user sequentially gazes, storing a plurality of the positions of the corneal reflection from the eye of the first user for the first plurality of points the first user gazes, illuminating an eye of a second user with a light source to produce a corneal reflection from the eye of the second user, using a camera to convert the corneal reflection from the eye of the second user into a second two-dimensional image, determining from the second two-dimensional image the position of the corneal reflection from the eye of the second user for a second plurality of points the second user sequentially gazes, the second plurality of points being fewer than the first plurality of points, determining and storing at least one mapping function, using the mapping function to convert the position of the corneal reflection from the eye of the second user to a respective position of the corneal reflection from the eye of the first user, and determining the point the second user is gazing from the stored positions of the corneal reflection from the eye of the first user.