Implementation of an Eye Gaze Tracking System for the Disabled People

The paper proposes a modified pupil center corneal reflection(PCCR) hardware method to improve the system accuracy. The modified PCCR eye gaze tracking system, a new version of the PCCR eye gaze tracking system supplemented by the relation between IR LED position and the distance from the eye gaze tracking system to the monitor screen, improves the tracking accuracy within one degree. The system also suggests a circuit that can do power control adaptively between the minimum and maximum power. It is confirmed that the system performs well both for indoors and outdoors in spite of the reduced calculation. Besides, very convenient mouse functions are proposed so that can be used on PC with the eye gaze tracking functions. The user group confirmed their performances that result in high level of satisfaction with excellent tracking function. Above all, the paper suggests the adaptive exposure control algorithm for the proposed system which is robust against light. The adaptive exposure control algorithm presents excellent performance over the existing system for both indoors and outdoors even when the calculation is down to one fifth.