Compensation Method of Natural Head Movement for Gaze Tracking System Using an Ultrasonic Sensor for Distance...

Area of Science:

• Human-Computer Interaction
• Biomedical Engineering
• Computer Vision

Background:

• Traditional gaze tracking often relies on the pupil center corneal reflection (PCCR) method, which uses near-infrared (NIR) illumination.
• While PCCR offers high accuracy by compensating for pupil position with corneal specular reflection (SR), it is limited by user head movement range.
• Natural head movements degrade the performance of conventional PCCR-based gaze tracking systems.

Purpose of the Study:

• To develop a novel gaze tracking method that overcomes the limitations of existing systems regarding natural head movements.
• To enhance the robustness and reliability of gaze tracking systems for real-world applications.

Main Methods:

• Proposed a new gaze tracking approach incorporating an ultrasonic sensor.
• Developed a compensation method to address inaccuracies caused by natural head movements.
• Evaluated the system's performance against non-compensated and commercial systems.

Main Results:

• The proposed ultrasonic sensor-based gaze tracking method demonstrated increased robustness to natural head movements.
• Experimental results confirmed superior performance compared to systems lacking the compensation method.
• The new system outperformed existing commercial gaze tracking solutions in terms of head movement tolerance.

Conclusions:

• The ultrasonic sensor-based gaze tracking method offers a significant improvement in robustness against natural head movements.
• This approach provides a more reliable and accurate gaze tracking solution for diverse user scenarios.
• The findings suggest a promising alternative for developing next-generation gaze tracking technologies.