Tobii TX300 - Data Sample Output; Eye tracker data sample output

Tobii TX300 Eye Tracker
9
Eye tracker data sample output
Different applications can be connected over TCP/IP (LAN connector) as clients to the eye tracker
to, e.g., gather eye gaze data in real-time and perform calibrations. Applications that can be used
together with the eye tracker include the Tobii Studio
TM
analysis software, third party analysis products
such as E-Prime
®
or your own custom written software for analysis, gaze-contingent applications or
eye control applications. For more information on how to create your own applications, please refer to
the Tobii Software Development Kit (SDK) product description.
Below is a list of data that can be accessed through the output of the eye tracker. In Tobii Studio
TM
analysis software this data can be accessed through a Raw data text export function, and easily
imported into a spreadsheet for further analysis.
Timestamp Timestamp in milliseconds stating the mid-exposure time when the sample was collected by the eye
tracker’s image sensors.
Gaze PointXLeft Horizontal screen position of the gaze point for the left eye.
GazePointYLeft Vertical screen position of the gaze point for the left eye.
CamXLeft Horizontal location of the left pupil in the camera image (0 is left edge, 1 is right edge).
CamYLeft Vertical location of the left pupil in the camera image (0 is top, 1 is bottom).
DistanceLeft Distance from the eye tracker to the left eye. The distance is given in mm on a straight axis right out
from the eye tracker plane.
PupilLeft Size of the pupil (left eye) in mm. The distance and pupil size measurements are calculated to be as
close to real values as possible. However, individual differences in the eyes of subjects or the strength
of glasses/contact lenses will affect the size values. The measures still reflect changes in pupil size
accurately.
ValidityLeft The validity code indicates the system’s confidence in whether it has correctly identified which eye is
left and right for the specific sample. The validity is 0 if the eye is found and the tracking quality good.
If the eye cannot be found by the eye tracker the validity code will be 4. The value is for the left eye.
Gaze PointXRight The horizontal screen position of the gaze point for the right eye.
GazePointYRight Vertical screen position of the gaze point for the right eye .
CamXRight Horizontal location of the right pupil in the camera image (0 is left edge, 1 is right edge).
CamYRight Vertical location of the right pupil in the camera image (0 is top, 1 is bottom).
DistanceRight Distance from the eye tracker to the right eye. The distance is given in mm on a straight axis out from
the eye tracker plane.
PupilRight Size of the pupil (right eye) in mm. The distance and pupil size measures are calculated to be as close
to real values as possible. However, individual differences in the eyes of subjects or the strength of
glasses/contact lenses will affect these values. However, the measures still reflect changes in pupil
size accurately.
ValidityRight The validity code indicates the system’s confidence in whether it has correctly identified which eye is
left and right for the specific sample. The validity is 0 if the eye is found and tracking quality is good. If
the eye cannot be found by the eye tracker, the validity code will be 4. The value is for the right eye.
Data sample output