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Tobii Glasses Eye Tracker
Tobii Glasses Smart IR Workflow
IR Markers
IR Markers within the glasses view
IR Markers out of the glasses view
Suggestion for additional IR Markers
Close
Middle
Far away
Glasses field of view
Participant wearing Tobii Glasses
Shopping shelves/research object
Glasses field of view at a specific distance
Tobii Glasses field of view and IR Markers
The illustrations below show that the Tobii Glasses scene camera and IR Marker Sensor, as with any camera, have
a limited field of view that influences the detection of IR Markers. Any IR Markers outside the glasses field of view
will not be detected. Since an AOA requires at least 4 IR Markers, it could be necessary to add additional IR Markers
to increase the coverage and flexibility of your setup, allowing for more free movement by the participant while still
detecting the 4 IR Markers needed to create an AOA. Especially at closer distances collecting data using IR Markers
can require much more than 4 IR Markers to still fully cover a large area, by taking this into account and limiting how
close a participant can approach the AOA, the amount of IR Markers required can be reduced significantly.
The visual area covered by the Tobii Glasses Scene Camera at different distances
Approximated scene camera visual area coverage width (W) and height (H) at different distances:
• W80 x H70 cm @ 1 meter
• W160 x H140 cm @ 2 meter
• W19 x H16 inches @ 2 feet
• W38 x H 33 inches @ 4 feet
• W77 x H 67 inches @ 6 feet
The scene camera coverage is comparable but not exactly equal to the actual IR Marker sensor field of
view, since it uses a different sensor.
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