Automatic calibration of a gaze direction algorithm from user behavior
First Claim
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1. A method of calibrating the eye gaze direction of a user in a three dimensional environment, the method comprising the steps of:
- (a) tracking the user'"'"'s uncalibrated eye gaze direction without the direct cooperation of the user;
(b) registering eye gaze direction measurements during a period of time when the user is likely to be looking in a direction corresponding to a known gaze direction based on the user'"'"'s probable behaviour within the tracking environment;
(c) performing a statistical analysis on the eye gaze direction measurements;
(d) correlating the user'"'"'s eye gaze direction with the known gaze directions for a statistically significant period of time; and
(e) calculating, from said correlating step, a series of likely eye gaze direction usage parameters associated with said user and applying these parameters to the eye gaze measurements to calibrate the eye gaze direction.
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Abstract
A method of calibrating the eye gaze direction of a user, the method including the steps of: (a) monitoring a user'"'"'s eye gaze direction whilst carrying out a series of predetermined tasks, each of the tasks having an expected subject gaze direction; and (b) correlating the user'"'"'s eye gaze direction with the expected direction for a statistically significant period of time; (c) calculating, from the correlating step, a series of likely eye gaze direction usage parameters associated with the user.
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Citations
13 Claims
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1. A method of calibrating the eye gaze direction of a user in a three dimensional environment, the method comprising the steps of:
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(a) tracking the user'"'"'s uncalibrated eye gaze direction without the direct cooperation of the user; (b) registering eye gaze direction measurements during a period of time when the user is likely to be looking in a direction corresponding to a known gaze direction based on the user'"'"'s probable behaviour within the tracking environment; (c) performing a statistical analysis on the eye gaze direction measurements; (d) correlating the user'"'"'s eye gaze direction with the known gaze directions for a statistically significant period of time; and (e) calculating, from said correlating step, a series of likely eye gaze direction usage parameters associated with said user and applying these parameters to the eye gaze measurements to calibrate the eye gaze direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for calibrating the eye gaze direction of a user in a three dimensional environment, the system including:
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an eye gaze direction measuring unit for tracking the user'"'"'s uncalibrated eye gaze direction without the direct cooperation of the user; and a processor configured to; register eye gaze direction measurements during a period of time when the user is likely to be looking in a direction corresponding to a known gaze direction based on the user'"'"'s probable behaviour within the tracking environment; perform a statistical analysis on the eye gaze direction measurements; correlate the user'"'"'s eye gaze direction with the known gaze directions for a statistically significant period of time; calculate, from the correlation, a series of likely eye gaze direction usage parameters associated with said user; and apply these parameters to the eye gaze measurements to calibrate the eye gaze direction.
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10. A method of calibrating the eye gaze direction of a user, the method comprising the steps of:
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(a) measuring, without the direct cooperation of the user, the user'"'"'s uncalibrated eye gaze direction repeatedly during a time period when the user is likely to be looking in a direction corresponding to a known gaze direction based on the user'"'"'s probable behaviour within the tracking environment; (b) building a histogram of user gaze direction values during the time period; (c) correlating peaks in the histogram with items of interest in the environment of the tasks; (d) calculating, from said correlating step, a series of likely eye gaze direction usage parameters associated with said user and applying these parameters to the eye gaze measurements to calibrate the eye gaze direction. - View Dependent Claims (11, 12, 13)
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Specification