Tobii Screen Positioning
What to do if Tobii is behaving poorly
Every time the user changes position, the tobii screen must be repositioned. First, press C to track eyes.
• You must view from side and from user position to ensure screen is parallel to and centered on
the user's face.
Tracked eyes (white dots) should be centered in black area (or a bit lower) and aligned with horizontal lines on the screen.
• Distance triangle should be in middle of green zone (or a bit higher)
Press A to calibrate only after Tobii is positioned and tracking is poor. Otherwise, useless.
Use whenever the user is moved, eye tracking quality is poor, and intermittently since the user position will shift over time. The user is not able to communicate or answer your questions unless the screen is in the correct position.
1. Turn off top lights to improve eye detection. Turn off side lights if user lying on side.
2. Press C on right side of Tobii to display eye tracking. White dots are the user eyes. They are present only when the eyes are open and visible to the Tobii camera.
3. Rough positioning:
4. Look directly from side and adjust:
You may need to crouch down to get direct view if head is low or if user is lying on side.
5. Look directly from behind screen or user point of view, and adjust:
6. Look directly from top and adjust:
7. Fine-Tune Rotation. Turn screen like steering wheel so that tracked eyes are horizontal on screen.
9.Repeat steps as needed to achieve the "Ideal Tobii Position" (see Page 1).
10.If Tobii performance is poor, recheck Tobii position and repeat steps as needed.
11.If the change in screen position was very large, if performance is persistently poor, or if user prompts you, Press A to re-calibrate the Tobii.