| 摘要 |
<p>A method for gaze tracking achieves high performances at the same time requiring both limited processor engagement and reduced power, so as to be particularly but not exclusively fit for mobile uses, and comprises the steps of: obtaining a digital video stream of a face through a camera, wherein eyes or pupils are identified in corresponding boxes in the spatial domain, the size thereof being function of the face position and orientation relative to said camera, the content of said boxes being the input for the further calculations; transferring the content of the boxes to the frequency domain; applying to said boxes transferred to the frequency domain one or more sparse zones, covering together a fraction of the boxed area transferred to the frequency domain, and a filtering kernel, at least partially overlapping said sparse zones; performing a multiplication between the frequency data within each sparse zone and said kernel, combining the results in a single value for each sparse zone; and repeating the above steps for each frame coming from the above video stream, the fluctuations of said single values being representative of a gaze direction changes along time.</p> |
