System and method for detecting a gaze of a viewer

A method of identifying a point of gaze of a viewer, the method comprising:

• identifying a location of an iris of the viewer in a two-dimensional image of the viewer, said image captured by an imager using visible light, said imager at a known location relative to an object viewed by said viewer;
• calculating a location of a point inside said eye, said point on a vector from said object viewed by said user and passing though said iris;
• tracking a location of an object on a face of said user;
• determining a location of said point in said eye relative to said location of said object on said face of said user;
• filtering out pairs of eye corners, wherein the angle between the length of the line connecting the corners to the line connecting the center of the iris centers is larger than a predefined value;
• and
• identifying said point of gaze on a vector from said point inside said eye and passing through said iris to said point of gaze.

A method of identifying an object that is the subject of a gaze of a viewer, the method comprising:

• capturing a first two-dimensional image of an iris of a user, said capturing using a single imager and visible light, and calculating a first location of said iris;
• calculating a point inside an eye of a viewer, said point on a vector from an object viewed by the user passing through said iris of the user;
• calculating a first location of said point inside said eye, said first location relative to a first location of a facial feature of said viewer in said first image;
• detecting in a second two-dimensional image a change in location of said facial feature;
• calculating a second location of said point inside said eye upon said change in said location in said facial feature, and a second location of said iris;
• filtering out pairs of eye corners, wherein the angle between the length of the line connecting the corners to the line connecting the center of the iris centers is larger than a predefined value;
• and
• identifying said object that is the subject of the gaze of the viewer, on a vector from said second location of said point inside said eye and passing through said second location of said iris.

A gaze detection system, comprising:

• an imager suitable to use visible light to capture two-dimensional images of an iris and of a facial feature of a viewer, said imager at a known position relative to objects being displayed on an electronic display;
• a processor configured to determine that an object of said objects is being viewed by said viewer at a defined time, wherein said imager is a mobile imager, and said electronic display is a mobile display;
• and
• wherein the processor is configured to:
• identify a location of an iris of the viewer in a two-dimensional image of the viewer captured by the imager;
• calculate a location of a point inside said eye, said point on a vector from said object viewed by said user and passing though said iris;
• track a location of an object on a face of said user;
• determine a location of said point in said eye relative to said location of said object on said face of said user;
• filter out pairs of eye corners, wherein the angle between the length of the line connecting the corners to the line connecting the center of the iris centers is larger than a predefined value;
• and
• identify said point of gaze on a vector from said point inside said eye and passing through said iris to said point of gaze.