tx300 technical presentation
DESCRIPTION
Presentation of the Tobii TX300, Tobii´s most accurate Eye Tracker that allows free head movement combined with 300Hz eye tracking and a removable screen.TRANSCRIPT
Tobii TX300 Eye Tracker
Name of presenter
2010-11-10
Tobii TX300 Eye Tracker
For research of oculomotor
functions and natural human
behavior
300 Hz sampling rate
Allows for large head movements
Accurate and precise data
Flexible stimuli presentation
Flexible software options
Unique possibilities
Tobii TX300 Eye Tracker collects gaze data at 300 Hz yet allows large head movements.
The system is designed for studies that require a higher sampling rate; e.g. the need to study eye movements such as saccades, correction saccades, fixations, pupil size changes and blinks.
In behavioral studies, subjects do not have to be positioned in an unnatural chinrest.
The unique combination of a higher sampling rate and large head movement box benefits studies where freedom of movement is important, including behavioral research or eye movement
TX300 is suitable for scientific studies in…
Neuroscience
Studies combing eye tracking and EEG
Ophthalmology
Reading
Psychology
Developmental psychology
Psycholinguistics
Gaze-contingent paradigms due to the very low latency
TX300 is suitable for usability and market research
studies in the fields of…
Neuroscience
Studies combing eye tracking and biometric
Reading
Psychology
Consumer psychology
Gaze-contingent paradigms due to the very low latency
Webcam
Two camera system
Inbuilt Audio Speaker
Invisible LED
Easy to adjust tilt angle
Screen Adjustment Button
Default Foot *
*) Floorstand interface or PC arm Ergotron/Innovatine interface available upon request
Ethernet
Connecting the PC
with the Eye Tracker.
Enables the digital
SDK communication
over TCP IP.
ON / OFF
Switching the Eye
Tracker on and off.
AUDIO IN
Connecting the
analogue audio ports
of the PC with the
Eye Tracker speaker
system.
POWER
19 V DC power
connected to the
AC/DC Power
adapter.
TRIGGER OUT
Digital interface that
indicates when the
Eye Tracker makes
a picture. It further
indicates the frame
number (timestamp).
STATUS LAMPS
Small lamps that can
be ON, OFF or
blinking. The LEDs
indicate the status of
the Eye Tracker
including errors.
TRIGGER IN
Not implemented
yet. For future use.
50 Ohm analogue
Coax connector.
Eye tracker unit interfaces
Accurate, precise and reliable data
Head movement compensation algorithms ensure high accuracy and precision when subjects are moving relative to the eye tracker.
Robust tracking capability also under ambient light conditions and during large and fast head movements.
Very stable sampling rate allows for precise synchronization of gaze data with data from other sources, e.g. EEG systems.
Effective binocular tracking allows for studies of individual eyes’ movements.
The raw data from the eye tracker contains information about pupil diameter size, which can be used to study pupil size changes over time.
Flexible stimuli presentation
Precise Screen tests can be verified in real scene environments.
The eye tracker can be used as X and T eye tracker, with the possibility to mount a screen on the eye tracker.
Configuration and calibration when using a T setup takes less than 5 minutes.
Setting up the Eye Tracker in X setups work the same as for X120/X60.
Digital angle meter shipped with the unitand makes it easy to configure.
Examples of X setups
T setup
Windows (or MAC) PC1
TX300 is compatible with
• Tobii Studio >2.2
• Tobii Toolbox for Matlab
• E-prime Extension Tool
• and all (most) other Tobii Software applications
Other PC
Tobii TX300 Eye Tracker
Eye Tracking
Hardware
Eyetracking
Application
Software
Provided by Tobii
Software provided
by other party
TCP IP
Tobii Studio
Tobii Studio
E-prime
Extension
Tool
Eprime
Talk2Tobii
Matlab (Mac)
Presentation
Tobii Eye Tracker Extension
Matlab
Presentation
Tobii Toolbox
for MatlabMatlab
All applications
contain the Tobii SDK
Appmarket application 1
SD
KS
DK
SD
KS
DK
SD
KS
DK
Appmarket application 25Appmarket application 25SD
K
Race the Monkey
Event Demo ApplicationSD
K
Flexible software options
DETAILED TECHNICAL SPECIFICATION
Accurate and precise data
Tobii has recently adopted a comprehensive method for gaze accuracy and precision measurements to facilitate performance comparisons of different remote eye tracking systems
In early 2011, final test results as well as a whitepapercontaining a detailed description of the complete method, will be available
The Tobii TX300 specification is a condensed version of the preliminary results from these measurements
See the TX300 product brochure for the entire preliminary test results
Precision measurements are done using artificial eyes to
eliminate artifacts from human eye movements. Tobii specifies
precision both with and without noise reduction filters. All
precision measurements are done at 300 Hz sampling rate
and a distance of 65 cm (26”). Precision is calculated as rootmean-
square (RMS) of successive samples.
Monocular1) Binocular1)
Precision with Stampe filter 2) 0.06° 0.04°
Precision without filter 3) 0.22° 0.15°
Precision at varying distances
Precision is dependent on distance from the eye tracker. The
graph below illustrates precision results for different distances.
Data shown is binocular.
Specification of gaze precision
Footnotes explained in script
Tobii accuracy is measured with the eye tracker moving in front of a test subject fixed in a
chinrest. The specifications below provide information on accuracy under various
conditions that influence a non-restrictive eye tracking test, e.g. change of head position
or light conditions after calibration.
Monocular Binocular
Accuracy under ideal conditions 4) 0.5° 0.4°
Accuracy at large gaze angles 5)
25° gaze angle 0.5° 0.4°
30° gaze angle 0.6° 0.5°
Accuracy at varying illumination 6)
1 lux 1.1° 0.9°
300 lux 0.5° 0.4°
600 lux 0.6° 0.4°
1000 lux 0.6° 0.5°
White stimuli background (300 lux) 0.8° 0.6°
Accuracy at varying distances 7)
The bars show min, max and average accuracy for all test
subjects at different distances from eye tracker to test subject.
Specification of gaze accuracy
Footnotes explained in script
Footnotes explained in script
Specification of TX300 eye tracker unit
Screen size 23“
Aspect ratio 16:9
Screen resolution (max) 1920 x 1080 pixels
Screen response time typical 5 ms
Built-in web camera 640 x 480 @ 30 fps
Weight 4 Kg
Connectors
USB (web camera)
DVI/VGA
Specification of screen unit
EXAMPLES OF USE
Example of typical x/y-time recording
saccade
0
200
400
600
800
1000
1200
11500 12000 12500 13000 13500 14000
Co
ord
inat
es(p
ixel
s)
Time (ms)
MappedGazeDataPointX
MappedGazeDataPointY
blink
saccade
”Look at the black square” saccade test
Usage example: ophthalmology
Demo project: Look at the black square
Usage example: ophthalmology
Demo project: Look at the black square
Usage example: ophthalmologyEvent demo application: Race the Monkey
Usage example: reading study
T120 @ 60Hz (raw data)
Usage example: reading study
TX300 @ 300Hz (raw data)
Usage example: reading study
More data per fixation
Usage example: reading study
More information on the saccade
1
Usage example: reading study
Regressive saccades
410 ms
1
Synchronization
There are various possibilities to synchronize the TX300
with stimuli and other biometric data
Neuroscience studies (e.g. EEG data)
Ophthalmology studies
Psychology research (e.g. developmental psychology and
psycholinguistics studies)
Gaze-contingent paradigms due to the very low latency
How to synchronize EEG
Typical EEG-synch with stimulus PC
STIM
PC
EEG
PC
Control box
SyncBox
USB
USB
Ethernet Connection
Electrodes
Amplifier
Parallel port
TTL-pulse
EEG-Device
For EEG a TTL signal is “just another probe”.
How to synchronize
E-Prime – Tobii Studio
E-PrimeTobii
Studio
EEG-PC
EEG-deviceEthernet cardParallel portTTL-Input
TTL-Pulse
Ethernet card
Stimulus presentation Eye tracking recording
EEG data recording
Eye
tracker
CVLogEvent
How to synchronize
E-Prime – Eye tracking firmware
E-Prime
EEG-PC
EEG-deviceEthernet cardParallel portTTL-Input
TTL-Pulse
Stimulus presentation
Eye tracking recording
EEG data recording
Eye
tracker
TET package calls
How to synchronize
Presentation – Tobii Studio
PresentationTobii
Studio
EEG-PC
EEG-deviceEthernet cardParallel portTTL-Input
TTL-PulseEthernet card
Stimulus presentation Eye tracking recording
EEG data recording
Eye
tracker
CVLogEvent
How to synchronize
Matlab (Tobii Toolbox for Matlab) – TET-server
Toolbox for
Matlab
& Matlab Stimuli /
Analysis
EEG-PC
EEG-deviceEthernet cardParallel portTTL-Input
TTL-Pulse
Stimulus presentation
Eye tracking recording
EEG data recording
Eye
tracker
Triggers
TET Package calls
How to synchronize
BrainProduct – Tobii Studio
Tobii
StudioEEG-PC
EEG-device
Ethernet card Ethernet card
Stimulus presentation
Eye tracking data recording
EEG data recording
Eye
tracker
CVLogEventMarkerSender
Brain Product & Tobii Compatibility officially to be announced during Q4.
A document from Tobii Training team including the above set ups is in preparation.
Eye Tracking
Hardware
Eye tracking
Firmware
What is a Noise Filter
Why use it?
Noise
Filter
Raw
X/Y coordinates
Analysis
Software
Fixation
Filter
Filtered
Low noise
X/Y coordinates
Fixation
Saccade
Corrective saccade
Glissade
Smooth Pursuit
What is a Fixation Filter?
Why use it?
Eyetracking Data Flow
The Product
Competition
Usage Examples
Typical Setups
Beta Feedback
Pricing
Launch Logistics
Eye tracking filter overview
Eyetracker
Tobii has chosen a ”Eyetracker gives you Raw Data” approach. The Tobii Raw Data
approach makes the process very transparent for the user:
•No matter what, you always get ”untouched” raw data from a Tobii eyetracker.
•No unknown algorithms twistle and tweak of your data
For customers that want to get access to a big part of the eyetracking data value
chain this is critical. Those customers most likely use their own software.
Analysis Software
Noise
Filter
Raw
X/Y coordinates
Analysis
Software
Fixation
Filter
Filtered
Low noise
X/Y coordinates
Fixation
Saccade
Corrective saccade
Glissade
Smooth Pursuit
Eye tracking
Firmware
Eye Tracking
Hardware
The Product
Competition
Usage Examples
Typical Setups
Beta Feedback
Pricing
Launch Logistics
A Tobii gives you pure raw data