| Summary: | 碩士 === 國立暨南國際大學 === 資訊工程學系 === 105 === Gaze tracking has become a popular human-computer interface which is widely
adopted in various applications. However, most gaze tracking methods do not
consider the influences of spectacle lens refraction and, therefore, can not
be applied to users wearing eyeglasses. In this thesis, a new
glint-feature-based (GFB) method (NGFB hereafter) is proposed which solves
the spectacle lens refraction problem in gaze tracking. In the NGFB method,
the ray tracking technique is employed to tackle the spectacle lens
refraction. Thus, the NGFB method is compatible with either spherical for
aspheric spectacle lenses. With the aid of ray tracing, the curvature center
of the cornea and the refracted line of sight can be evaluated accurately. In
this thesis, four experiments are conducted to test the proposed method via
computer simulations. First, robustness of the NGFB method against the image
noises is tested with spectacle lenes of diopters -5, -3, -1, 1, 3, and 5,
respectively. Second, the influences of the position of virtual reflection
plane used in the NGFB method to gaze tracking accuracy are examined. Third,
the influences of the pose error of the spectacle lens to gaze tracking
accuracy are evaluated. Experimental results show that the proposed NGFB
method is robust against image noises and is insensitive to the spectacle
lens pose estimation error.
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