Gaze Estimation Method Involving Corneal Reflection-Based Modeling of the Eye as a General Surface of Revolution about the Optical Axis of the Eye

摘要

We have proposed a novel geometric model of the eye in order to avoid the problems faced while using the conventional spherical model of the cornea for three dimensional (3D) model-based gaze estimation. The proposed model models the eye, including the boundary region of the cornea, as a general surface of revolution about the optical axis of the eye. Furthermore, a method for calculating the point of gaze (POG) on the basis of our model has been proposed. A prototype system for estimating the POG was developed using this method. The average root mean square errors (RMSE_s) of the proposed method were experimentally found to be smaller than those of the gaze estimation method that is based on a spherical model of the cornea.