Appendix C
Data Output
Different applications can be connected 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 software, third party software
products, or your own custom software based on the Tobii Software Development Kit. For more information about the supported
software products please refer to the product descriptions and documentation for the respective products.
Below is a summary of the data that the eye tracker outputs. Please note that the parameter names, definitions and coordinate
systems may differ depending on the software used, please refer to the software documentation for additional information.
TTiim
meessttaam
mp
p
Timestamp in microseconds from the eye tracker
’
s internal clock. Additional timestamps are
available in Tobii Studio.
G
Gaazzee P
Pooiinntt LLeefftt X
X,, Y
Y
Horizontal (X) and vertical (Y) coordinates of the gaze point for the left eye. Available in
different coordinate systems in Tobii Studio and the Tobii Software Development Kit.
E
Eyyee P
Poossiittiioonn LLeefftt X
X,, Y
Y,, Z
Z
The 3D position of the left eye in relation to the eye tracker. Available in different coordinate
systems in Tobii Studio and the Tobii Software Development Kit.
P
Puup
piill D
Diiaam
meetteerr LLeefftt
Estimated diameter of the left eye pupil in millimeters.
V
Vaalliid
diittyy C
Cood
dee LLeefftt
Indicates the confidence level that the left eye has been correctly identified by the eye tracker.
G
Gaazzee P
Pooiinntt R
Riig
ghhtt X
X,, Y
Y
Horizontal (X) and vertical (Y) coordinates of the gaze point for the right eye. Available in
different coordinate systems in Tobii Studio and the Tobii Software Development Kit.
E
Eyyee P
Poossiittiioonn R
Riig
ghhtt X
X,, Y
Y,, Z
Z
The 3D position of the right eye in relation to the eye tracker. Available in different coordinate
systems in Tobii Studio and the Tobii Software Development Kit.
P
Puup
piill D
Diiaam
meetteerr R
Riig
ghhtt
Estimated diameter of the left eye pupil in millimeters.
V
Vaalliid
diittyy C
Cood
dee R
Riig
ghhtt
Indicates the confidence level that the right eye has been correctly identified by the eye
tracker.
Tobii X2-30 Eye TrackerUser
’
s manual v.1.0.3 - en-US
Appendix C Data Output
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