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A Method for Localizing the Eye Pupil for Point-of-Gaze Estimation

The estimation of the point of gaze in a scene presented on a digital screen has many applications, such as fatigue detection and attention tracking. Some popular applications of eye tracking through gaze estimation are depicted in Fig. 1. When estimating the point of gaze, indentifying the visual focus of a person within a scene is required. This is known as the eye fix or point of fixation. Finding the point of gaze involves tracking different features of human eyes. Various methods are available for eye tracking, some of which use special contact lenses, whereas others focus on electrical potential measurements. Optical tracking is a nonintrusive technique that uses a sequence of image frames of eyes that have been recorded using video-capturing devices. This technique is popularly known as video oculography.