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2 Technical Specifications

The characteristics of an eye tracker can be described in terms of gaze accuracy and gaze precision. Accuracy describes the an-
gular average distance from the actual gaze point to the one measured by the eye tracker. Gaze precision describes the spatial
variation between successive samples collected when the subject fixates at a specific point on a stimuli. More information re-
garding the accuracy and precision measurements can be found in

Appendix B: Accuracy and Precision Measurements. A glos-

sary can be found at

Appendix A: Glossary.

2.1

Tobii X2

–

30 Eye Trackers

Table 2.1 Gaze Accuracy (Preliminary)

G

Gaazzee aaccccuurraaccyy

1

TToob

biiii X

X2

2--3

30

0 E

Eyyee TTrraacckkeerr C

Co

om

mp

paacctt E

Ed

diittiioonn

((ffiirrm

mw

waarree vveerrssiioonn 0

0..7

7..3

3))

TToob

biiii X

X2

2--3

30

0 E

Eyyee TTrraacckkeerr W

Wiid

dee E

Ed

diittiioonn

((ffiirrm

mw

waarree vveerrssiioonn

—

—

p

peennd

diinng

g))

B

Biinnooccuullaarr

M

Moonnooccuullaarr

B

Biinnooccuullaarr

M

Moonnooccuullaarr

At ideal conditions

0.4

0.5

0.4

0.5

At 25° gaze angle

0.5

0.6

0.5

0.6

At 30° gaze angle

0.5

0.6

0.5

0.6

At 35° gaze angle

N/A

N/A

Pending

Pending

At 1 lux

Pending

Pending

Pending

Pending

At 300 lux

0.4

0.5

0.4

0.5

At 600 lux

Pending

Pending

Pending

Pending

At 1000 lux

Pending

Pending

Pending

Pending

White stimuli background

Pending

Pending

Pending

Pending

1.

Accuracy under ideal conditions is measured in the centre of the head movement box with the subject fixed in a chinrest. Data is collected immediately after calibration, in a controlled laboratory

environment with constant illumination, with 9 stimuli points at gaze angles of

≤

18º.

A

Accccuurraaccyy aatt iid

deeaall cco

onnd

diittiioonnss

—

—

X

X2

2

––

3

30

0 C

Co

om

mp

paacctt E

Ed

diittiioonn ((P

Prreelliim

miinnaarryy))

A

Accccuurraaccyy aatt vvaarryyiinng

g d

diissttaanncceess

—

—

X

X2

2

––

3

30

0 C

Coom

mp

paacctt E

Ed

diittiioonn ((P

Prreelliim

miinnaarryy))

Product Description v.1.0 - en-US

2 Technical Specifications

3

Содержание X2-30 Eye Tracker Compact Edition

Страница 1: ...Product Description Tobii X2 30 Eye Tracker Compact Edition Tobii X2 30 Eye Tracker Wide Edition Tobii X2 60 Eye Tracker Compact Edition Tobii X2 60 Eye Tracker Wide Edition ...

Страница 2: ... claim to these trademarks While every precaution has been taken in the preparation of this document the publisher and the author assume no responsibility for errors or omissions or for damages resulting from the use of information contained in this document or from the use of programs and source code that may accompany it In no event shall the publisher and the author be liable for any loss of pr...

Страница 3: ...creen Setups 9 4 1 1 Local Live Viewer 9 4 2 Typical Tobii X2 Eye Tracker Physical Object Setup 10 4 2 1 External video stimulus recording 10 A Ap pp pe en nd diix x A A G Gllo os ss sa ar ry y 1 11 1 A Ap pp pe en nd diix x B B A Ac cc cu ur ra ac cy y a an nd d P Pr re ec ciis siio on n M Me ea as su ur re em me en nt ts s 1 12 2 B 1 Gaze Precision 12 B 2 Gaze Accuracy 12 A Ap pp pe en nd diix x...

Страница 4: ......

Страница 5: ...s a smaller version of the eye tracker measuring 184 mm 7 2 in length It enables your portable eye tracking lab or studies that require a small eye tracker to track Laptops and smaller PC monitors up to app 22 up to 31 gaze angle Mobile devices Small real world interfaces T To ob biiii X X2 2 3 30 0 E Ey ye e T Tr ra ac ck ke er r C Co om mp pa ac ct t E Ed diit tiio on n m mo ou un nt te ed d o o...

Страница 6: ...e T To ob biiii X X2 2 6 60 0 E Ey ye e T Tr ra ac ck ke er rs s The X2 60 eye tracker is designed for studies aimed at determining precisely where the participants are looking and for studying and measuring eye fixations and other eye tracking metrics based on these 1 3 Basic Operating Principles During tracking Tobii Eye Trackers use infrared diodes to generate reflection patterns on the corneas...

Страница 7: ...o on n p pe en nd diin ng g B Biin no oc cu ulla ar r M Mo on no oc cu ulla ar r B Biin no oc cu ulla ar r M Mo on no oc cu ulla ar r At ideal conditions 0 4 0 5 0 4 0 5 At 25 gaze angle 0 5 0 6 0 5 0 6 At 30 gaze angle 0 5 0 6 0 5 0 6 At 35 gaze angle N A N A Pending Pending At 1 lux Pending Pending Pending Pending At 300 lux 0 4 0 5 0 4 0 5 At 600 lux Pending Pending Pending Pending At 1000 lux ...

Страница 8: ...to subject 40 90 cm 15 7 33 5ʺ 50 100 cm 20 39ʺ R Re ec co om mm me en nd de ed d s sc cr re ee en n s siiz ze e up to 22ʺ up to 27ʺ D Da at ta a s sa am mp plle e o ou ut tp pu ut t Timestamp eye position gaze point pupil diameter validity code Timestamp eye position gaze point pupil diameter validity code 1 As the Tobii X2 30 Eye Trackers have a variable and low sampling rate they are not suitab...

Страница 9: ...ii X2 Eye Tracker laptop case Tobii X2 Eye Tracker laptop case Tobii X2 Eye Tracker desk stand package Tobii X2 Eye Tracker desk stand kit Digital angle gauge Measuring tape Tobii X2 Eye Tracker desk stand package Tobii X2 Eye Tracker desk stand kit Digital angle gauge Measuring tape 2 2 Tobii X2 60 Eye Trackers Table 2 1 Gaze Accuracy Preliminary G Ga az ze e a ac cc cu ur ra ac cy y1 T To ob bii...

Страница 10: ...ance eye tracker to subject 45 90 cm 15 7 33 5ʺ 50 100 cm 20 39ʺ R Re ec co om mm me en nd de ed d s sc cr re ee en n s siiz ze e up to 22ʺ up to 27ʺ D Da at ta a s sa am mp plle e o ou ut tp pu ut t Timestamp eye position gaze point pupil diameter validity code Timestamp eye position gaze point pupil diameter validity code 1 Freedom of head movement describes the volume in front of the tracker in...

Страница 11: ...cable N A Zipper bag Zipper bag Tobii X2 60 Eye Tracker USB memory stick containing the Tobii Eye Tracker Installer Tobii X2 60 Eye Tracker USB memory stick containing the Tobii Eye Tracker Installer Tobii X2 60 Eye Tracker user manual Tobii X2 60 Eye Tracker user manual Tobii X2 60 Eye Tracker external processing unit Tobii X2 60 Eye Tracker external processing unit N A X2 Wide Edition mounting a...

Страница 12: ... 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 Shifts between the use of eye tracking technique during a recording will also affect the pupil size value V Va alliid diit ty yL Le ef ft t The validity code indicates the system s confidence in whether it has correctly identified which e...

Страница 13: ...user sound S Siin ng glle e S Sc cr re ee en n S Se et tu up ps s Primary Screen Stimulus pre sentation Primary Sc reen Stimulu s pre sentation Primary Sc reen Stimulu s pre sentation USB USB USB VGA DVI out Comput er with Tobii Studio or oth er s upported s oftware Comput er with Tobii Studio or oth er s upported s oftware Comput er with Tobii Studio or oth er s upported s oftware VGA DVI out LAN...

Страница 14: ...lication runs on the Windows operating system and it does not use 3D graphics accelera tion or it does not have a high processor load and high memory usage it may be more suitable and less complex to in stead run this on the same computer as Tobii Studio and use the Screen Recording option in Tobii Studio For this setup the image from the Tobii Studio computer has to be displayed on the screen dur...

Страница 15: ... again but only if the subject has maintained approximately the same head position during the blink Data during blinks are only lost when the pupil is occluded i e during the eye lid movement itself or when the eye is closed T Tiim me e t to o t tr ra ac ck kiin ng g r re ec co ov ve er ry y a af ft te er r llo os st t t tr ra ac ck kiin ng g An eye tracker working in a natural user environment ma...

Страница 16: ...uli points across a screen The accuracy figure presented is the mean accuracy from all subjects Good accuracy is difficult to achieve at large gaze angles but is important when testing large stimuli For instance the upper corner of a 23 screen with the test subject at a distance of 65 cm 26 from the eye tracker corresponds to a 32º visual angle from the center of the eye tracker unit Consequently ...

Страница 17: ...e or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into a wall outlet on a circuit different from that to which the receiver is connected Consult the dealer or experienced radio TV technician for assistance C 2 Industry Canada Statement This Class B digital apparatus complies with Canadian ...

Страница 18: ...medical devices are susceptible to disturbance by IR light and or radiation Do not use the Tobii X2 Eye Trackers when in the vicinity of such susceptible medical devices as their accuracy or proper functionality could be inhibited 14 C Compliance Information and Warnings Product Description v 1 0 en US ...

Страница 19: ...15 ...

Страница 20: ...03 738 1313 www tobii com sales tobii com www tobii com sales de tobii com www tobii com sales cn tobii com www tobii com sales jp tobii com www tobii com sales us tobii com Tobii Illustrations and specifications do not necessarily apply to products and services offered in each local market Technical specifications are subject to change without prior notice All other trademarks are the property of...

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