Gaze Tracking System for User Wearing Eye Glasses

• Main Authors: LEE,TUNG-YING, 李侗穎
• Other Authors: SHIH, SHENG-WEN
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/nr8w5d

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.