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Calibration Tips and Techniques1. Use a good set upEach eye gaze camera works in a slightly different way, but for astandard calibration we recommend starting with the followingsettings:• A dark background colour• 5 point calibration• Use a motivating image or a high contrast colour• Medium speed or step-through calibration2. Keyboard step-throughSome eye gaze cameras allow you to use a keyboard step-throughcalibration. This means that you are in control of when to recordthe calibration points. You should press the key only when theuser is looking directly at the calibration target.To do this effectively you will need to look at the user’s eyes andanalyse when they are looking at the calibration target.3. Use image for calibrationA good way of encouraging users to calibrate is to use images theyare familiar with. Please check if your eye gaze camera has thisfeature.4. Improve pointsSome eye gaze cameras allow you to recapture a reading. It isworth taking the time to try and improve failed calibration pointsfor better accuracy.6
5. Change colour contrastA dramatic colour contrast can make it easier for some users totrack the calibration point. The most effective colour contrast forvisually impaired users is blue on a yellow background.6. Things to watch out for• Reflective frames on glasses• Droopy eyelids or long eyelashes (try moving the screen higherto encourage eyes to open)• Any bright light shining onto the eye gaze camera7. Positioning setup tips• Use the camera’s track indicator to ensure the eyes are at thecorrect height and distance from the screen.• Move the computer into the correct position, not the user!8. Think about your environmentThe environment in which you use eye gaze can make a bigdifference to its success. For the best results:• Remove unnecessary distractions like posters, televisions andpeople!• Use a quiet location• Avoid too much light – a darker room will make the contentlook more attractive
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