Abstract

For years, eye tracking technology has been making huge improvements and has become very popular in the robotics industry. This paper covers a new concept resulting in the creation of a fully functioning prototype utilising eye tracking technology that can aid with such things as improved visibility or better communication for people in the workplace or at home. The concept involves a portable headset that can track the user's gaze direction and accurately point an illumination source at the point of eye fixation. Use cases for such a device could include assisting people working in low light conditions by directing a beam of light in the gaze direction or for people living with disabilities that possess substandard verbal communication skills, by acting as an eye-controlled laser pointer. The prototype uses digital servo motors, a 3D printed pan-tilt platform, a microcontroller, an illumination source and off-the-shelf eye-tracking glasses. The result is a responsive and accurate device that could potentially be transformative for many people around the globe.

Highlights

  • Viewing and analysing the movement of human eyes has been a topic of investigation for over a century

  • The most common method of eyetracking used in most modern devices is video-oculography which is non-invasive and usually gives high levels of accuracy and good sampling rates [2]

  • A platform is rotated here instead of a fixed illumination source so that different illumination sources can be attached at this early development stage

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Summary

Introduction

Viewing and analysing the movement of human eyes has been a topic of investigation for over a century. The most common method of eyetracking used in most modern devices is video-oculography which is non-invasive and usually gives high levels of accuracy and good sampling rates [2] This involves recording the eye position with video cameras which can be implemented using several techniques – the most common of which is dark or bright pupil with corneal reflection which involves contrasting the amount of infrared light reflected by different sections of the eye [3]. Off-the-shelf eye-tracking equipment is becoming quite accessible: for instance, the Pupil glasses are a wearable, noninvasive gaze tracking solution that are affordable and customisable [4] They offer good levels of precision (0.08°) and accuracy (0.6°) and use a completely open-source software framework [5]. This is a much cheaper alternative to other high-end devices which can cost upwards of hundreds of thousands of dollars [6]

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