Point of gaze tracking with integrated calibration process

A system for measuring tracking a point of gaze of a subject, comprising:

• one or more memories;
• and
• at least one processor each coupled to at least one of the memories and configured to perform operations comprising:
• obtaining video of at least a portion of a face of the subject while the subject is viewing content of a test sequence presented within a display area of a display, wherein an integrated calibration process is performed during the test sequence, the integrated calibration process comprising:
• determining, by analyzing the video a series of time points at which a gaze of the subject is dwelling on a visual target and, for at least each time point in the series of time points, a corresponding set of eye features;
• after determining the series of time points, obtaining, for each of the time points in the series of time points, a location of a visual stimulus presented within the display area of the display;
• and
• determining a mapping that maps a set of eye features to a point of gaze, wherein the determining is performed based at least on (i) the set of eye features for each of the time points in the series of time points and (ii) the location of the visual stimulus within the display area of the display for each of the time points in the series of time points;
• and
• using the mapping to respectively map one or more sets of eye features to one or more points of gaze of the subject.

A non-transitory computer-readable medium having instructions stored thereon that, when executed by at least one computer processor, cause the at least one computer processor to perform operations for tracking a point of gaze of a subject, the operations comprising:

• obtaining video of at least a portion of a face of the subject while the subject is viewing content of a test sequence presented within a display area of a display, wherein an integrated calibration process is performed during the test sequence, the integrated calibration process comprising:
• determining, by analyzing the video a series of time points at which a gaze of the subject is dwelling on a visual target and, for at least each time point in the series of time points, a corresponding set of eye features;
• after determining the series of time points, obtaining, for each of the time points in the series of time points, a location of a visual stimulus presented within the display area of the display;
• and
• determining a mapping that maps a set of eye features to a point of gaze, wherein the determining is performed based at least on (i) the set of eye features for each of the time points in the series of time points and (ii) the location of the visual stimulus within the display area of the display for each of the time points in the series of time points;
• and
• using the mapping to respectively map one or more sets of eye features to one or more points of gaze of the subject.