Tobii Glasses User Manual
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Tobii Glasses User Manual

Tobii glasses eye tracker user manual
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Summary of Contents for Tobii Glasses

  • Page 1 User Manual Tobii ® Technology Tobii Glasses Eye Tracker www.tobii.com...
  • Page 2 On Safety Read this manual carefully before connecting and using the eye tracker The Tobii Glasses Eye Tracker is designed only for indoor use. Avoid any exposure to direct sunlight as this will affect eye tracking quality. Do not open the eye tracker Non-compliance will result in loss of Warranty.
  • Page 3 Tobii Technology AB, is strictly prohibited. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, without the prior consent of the copyright holder.

  • Page 4: Table Of Contents

    8 Tobii Glasses Smart IR Workflow ........

  • Page 5: Product Care

    Cleaning Before cleaning any part of the Tobii Glasses eye tracking equipment, unplug the power cord from the outlet and make sure the device is turned off. Both Tobii Glasses and the Recording Assistant have surface coatings that require special care. Only use the supplied micro-fiber cleaning cloth or similar products specially intended for cleaning screens or glass with a special coating.

  • Page 6: Tobii Glasses At A Glance

    Wall socket adapter (for AC adapter) Extra storage space Inside the case pocket: • Tobii Glasses User Manual • Tobii Glasses Field Guide or Tobii Glasses Smart IR Field Guide Also included in Base Package • IR Marker charger • AC adapter • AC power cable (grounded)

  • Page 7: Glasses

    Tobii Glasses Eye Tracker Glasses View of front Illuminators Scene camera IR Marker sensor IR reflective glass Eye tracking sensor View of right side Headband attachment Microphone Rubber temple arm Illuminators Belt Unit 091110 Graphic overlay gradient Recording Assistant Top connections...

  • Page 8: Tobii Glasses Introduction

    Tobii Glasses introduction The Tobii Glasses is a mobile eye tracking system with the option to use IR Markers to define so called Areas Of Analysis (AOA´s) for automated data aggregation. AOA´s make it possible to obtain visualizations and statistics from the collected eye tracking data.

  • Page 9: How To Use This User Manual

    3 How to Use this User Manual This user manual is set up to accommodate all users of Tobii Glasses, including both users with and without the Smart IR Markers. Both types of users should read the Preparation chapter and the Recording with Tobii Glasses chapter.

  • Page 10: Preparation

    If necessary, adjust the headband and the nose pad. Squeeze or pull apart the wings of the nose pad to position the glasses higher or lower on the nose of the participant.
  • Page 11 Nose pad clip Push the nose pad into the slot in the bottom of the nose bridge of the glasses until it clips in place. To remove the nose pad clip, pull the clip straight out and downward.

  • Page 12: Recording Assistant

    The battery compartment of the Recording Assistant is located on the back of the unit. Only use the batteries provided with the Tobii Glasses (Varta EasyPack XL, 3.7 V). Battery life is dependent on usage and can last for up to 70 minutes of use.
  • Page 13 Battery life Battery life is dependent on usage. A fully charged battery can provide up to 70 minutes of use. When Tobii Glasses are not recording, the battery will consume only slightly less energy. It is recommended that you keep the Recording Assistant connected to the AC adapter.
  • Page 14 7). Only use the memory card provided with the Tobii Glasses or the same type and brand with the exact same specifications: max. 4GB, High Speed Memory (Transcend TS4GSDHC150 or Lexar 133X only). When using a card for the first time it is recommended that you format it in the Recording Assistant.
  • Page 15 Turn the Recording Assistant on by holding the ON/OFF button and releasing once the startup screen is shown (Tobii logo). The device will then check the SD card and start up. If there is no SD card found the device will turn off.
  • Page 16 Using the AC adapter with Tobii Glasses The Tobii Glasses can also be used with the supplied AC adapter to avoid using the battery when power is available. 1. Connect the AC adapter (with appropriate wall socket adapter) to a power outlet and plug it into the Recording Assistant.

  • Page 17: Ir Markers

    Markers will be activated. IR Markers never turn off but instead go into a standby mode, both while in and out of a Holder. If stored or not being activated by a pair of Tobii Glasses that are in range, their battery will last for about 14 days.

  • Page 18: Battery Status

    IR Marker Holder mode occurs when the IR Marker is connected to an IR Marker Holder. The IR Marker transmits Charging status in the IR Marker Charger the unique ID of the IR Marker Holder to the glasses, used to define Areas Of Analysis. The LED indicator is off in IR Marker Holder mode...

  • Page 19: First Time Use

    Switching modes between Calibration mode and IR Marker Holder mode (and vice versa) will not take place after placing or removing an IR Marker from an IR Marker Holder if a pair of active glasses is present (switched on and in range of the IR Markers).
  • Page 20 User Manual Setting the Date, Time, and Date Format Step 2 To set the Date, Time, and Date Format on the Recording Assistant: 1. Make sure the Recording Assistant unit is on. Hold the ON/OFF button to turn the Recording Assistant on. 2.
  • Page 21 Tobii Glasses Eye Tracker Setting the Time Step 7 To set the Time: 6. Follow steps 1-5 on the previous page choosing Time in step 5. 7. Use the scroll bar to select the hour and push Next. 8. Use the scroll bar to select the minutes and push Save to save the new Time.

  • Page 22: Recording With Tobii Glasses

    User Manual 5 Recording with Tobii Glasses Checking the Status Checking the battery and memory status Low battery indication The battery indicator is located in the top left corner of the display. Charge the battery or connect the Recording Assistant to the power supply if the battery icon indicates a low battery level.

  • Page 23: Sessions

    (only the initial calibration), it is possible to copy the initial calibration for that participant to his/her other sessions. Ensure that the participant has not moved the glasses in between sessions, in which case a new calibration should always be done. You...

  • Page 24: Recording

    • If during the Track Status screen the pupil seems difficult to find, please try the following: Pausing a recording • First, give it a few seconds as the Tobii Glasses try to find the pupil automatically. • Check if anything is obstructing the eye or eye tracking sensor or...

  • Page 25: Calibrating

    A red dot may indicate a blink or bad trackability, due to the glasses placement or general problems such as eye lashes, mascara, droopy eye lids etc. When this occurs the glasses may require further adjustment or asking the participant to minimize the problem, for example by taking off any mascara.
  • Page 26 User Manual Step 8 8. Watch the Recording Assistant screen while moving the IR Marker slowly over each calibration point in the Virtual Calibration Plane and waiting until the point turns green before continuing to the next. Continue until each point of the calibration grid on the Recording Assistant has turned green.
  • Page 27 Tobii Glasses Eye Tracker The score shown in Session(s) list The score shown in Session(s) list For practical purposes (to allow the user to get a quick overview of the recordings available) only one of the scores is shown in the Session(s) list.
  • Page 28 User Manual...

  • Page 29: Pilot Study

    2. Analyze and replay the data in Tobii Studio. Confirm that the data is correct and there is no unexpected data loss and your setup is working as expected and meets your established requirements. Use the Glasses Data Viewer feature (right click on any imported recording in the Replay tab to access) To analyze a recording in more detail and find how the IR Markers are picked up by the glasses for your specific study setup.
  • Page 30 User Manual...

  • Page 31: Tobii Glasses Workflow

    3. Create parallax adjustments for each recording using the Parallax Correction Tool 4. Review Glasses Data using the Glasses Data Viewer for in-depth frame by frame analysis 5. If applicable, create a Coding Scheme for manual coding and manually code events in each recording...

  • Page 32: Importing Recordings

    4. In the Tobii Studio Project Library dialog box create a new Project and Test. This will open Tobii Studio to the Design and Record view. 5. From Tobii Studio’ s menu bar, click File and select Import Glasses Data. Step 6 6.
  • Page 33 Participant Name Prefix text entry field every time you import an additional SD card in a Tobii Studio Test. This feature will append the chosen prefix to the participant name, effectively creating a unique name and avoiding recordings being merged into existing participants.
  • Page 34 User Manual User Manual Selecting the Video import check box can Repair corrupted video frames during import. Only select this option if the originally imported video shows corrupted video frames. Importing using this setting will take considerably more time.

  • Page 35: Replaying Recordings

    Viewing a Recording in Tobii Studio The Tobii Glasses recordings can be used in the same way as a regular Tobii Studio recording can be used. You can playback the recording showing the gaze data, create segments and scenes (although not applicable in dynamic video), export the recording as a movie, and insert events using a Coding Scheme.
  • Page 36 Samples percentage and eye tracking quality Tobii Studio can show the percentage of the total samples (Glasses is a 30Hz eye tracker, which means it takes 30 samples of gaze data per second) that are mapped within the scene camera video/stimulus area. Right click on any recording and select Show>Samples to show this percentage.

  • Page 37: Glasses Data Viewer

    Glasses Data Viewer Reviewing Glasses Data in Tobii Studio The Glasses Data Viewer can be used to do the following: Make a frame by frame analysis of your recording and gaze position; view all Glasses data such as Gaze coordinates per frame including frame number; see...

  • Page 38: Parallax Correction Tool

    Tobii Studio includes a Parallax Correction Tool. This tool allows you to set the relative distance between whatever the participant was looking at and the Glasses and will calculate the correct gaze position on the scene video based on these settings. When importing, the Default distance setting is always the calibrated distance of 1 meter.
  • Page 39 This will take you back to the Replay screen. 6. Click the Glasses Tools button at the bottom and notice the gray interval with the distance you selected Multiple corrections can be made before clicking the Save changes button.

  • Page 40: Manual Coding

    Coding Scheme dialog box To set the Coding Scheme: 1. With Tobii Studio open to the appropriate glasses Project, click Tools in the menu bar and then select Coding Scheme. 2. Click a row in the Description column and type the name of the event (for example: Started Looking at Brand A, Stopped Looking at Brand A, Selected Brand B).
  • Page 41 C) Exporting Event Data To export the event data: 1. Click the Data Export tab in Tobii Studio. Select the desired Output to One single file or to Individual files, as desired. 2. Select the file type from the File extension dropdown list and name the file(s).
  • Page 42 Manual coding on multiple computers at once Any manual coding can also be done on several computers at the same time providing they all have a valid Tobii Studio license, for example: 1 person is coding recording 1-20, another person could code 21-40 etc. To do this a single “Main”...
  • Page 43 Tobii Glasses Eye Tracker...

  • Page 44: Tobii Glasses Smart Ir Workflow

    2. Set independent variables for each participant/recording 3. Create parallax adjustments for each recording using the Parallax Correction Tool 4. Review Glasses Data using the Glasses Data Viewer for a more in-depth frame by frame analysis of the recorded scene, gaze data and IR Marker detection 5.

  • Page 45: Area Of Analysis (Aoa)

    Area of Analysis. AOAs are recognized by the IR Marker Sensor in the Tobii Glasses at any time it can detect at least 4 or more IR Markers. By taking a photo or “Snapshot” of an AOA, Tobii Studio can overlay the aggregated gaze data from multiple participants on this single image.

  • Page 46: Using Ir Markers

    IR Marker reference points (measured from the IR illuminator) stay on the same plane (see the image below). Place the IR Markers at an angle pointing towards the glasses worn by a participant to improve the tracking of IR Markers by Tobii Glasses.
  • Page 47 The illustrations below show that the Tobii Glasses scene camera and IR Marker Sensor, as with any camera, have a limited field of view that influences the detection of IR Markers. Any IR Markers outside the glasses field of view will not be detected.
  • Page 48 There is an inherent maximum to the size of AOA size, due to the fact that 4 IR Markers always have to stay within the field of view of the glasses IR Marker Sensor. See the illustrations below for an explanation of how the maximum AOA can be roughly estimated, for a specific distance.
  • Page 49 AOA. By adding more IR Markers you can extend IR Marker coverage and therefore the maximum AOA size, where 4 IR Markers are still within the field of view of the glasses camera. The Tobii Glasses only require 4 IR Markers to define an AOA but may use any amount or combination of at least 4 markers, therefore all IR Markers used on a shelf should be included within a single Snapshot.

  • Page 50: Snapshots

    3. Hold the glasses in your hands and point the camera towards the object or scene you want to take a snapshot of. Move the glasses around while looking at the display to adjust the position if necessary.

  • Page 51: Importing Recordings

    4. In the Tobii Studio Project Library dialog box create a new Project and Test. This will open Tobii Studio to the Design and Record view. 5. From Tobii Studio’ s menu bar, click File and select Import Glasses Data. Step 6 6.
  • Page 52 Participant Name Prefix text entry field every time you import an additional SD card in a Tobii Studio Test. This feature will append the chosen prefix to the participant name, effectively creating a unique name...
  • Page 53 12. When you are finished press the Import button to import the selected recordings. Tobii Studio will then import each Tobii Glasses Session as a Tobii Studio Recording. The Participant Name included in each recording is equal to the session number from the Recording Assistant.

  • Page 54: Replaying Recordings

    Viewing a Recording in Tobii Studio The Tobii Glasses recordings can be used in the same way as a regular Tobii Studio recording can be used. You can playback the recording showing the gaze data, create segments and scenes (although not applicable in dynamic video), export the recording as a movie, and insert events using a Coding Scheme.
  • Page 55 Samples percentage and eye tracking quality Tobii Studio can show the percentage of the total samples (Glasses is a 30Hz eye tracker, which means it takes 30 samples of gaze data per second) that are mapped within the scene camera video/stimulus area. Right click on any recording and select Show>Samples to show this percentage.

  • Page 56: Glasses Data Viewer

    Glasses Data Viewer Reviewing Glasses Data in Tobii Studio The Glasses Data Viewer can be used to do the following: Do a frame by frame analysis of your recording and gaze position; view all Glasses data such as Gaze coordinates per frame including frame number; see...

  • Page 57: Parallax Correction Tool

    Tobii Studio includes a Parallax Correction Tool. This tool allows you to set the relative distance between whatever the participant was looking at and the Glasses and will calculate the correct gaze position on the scene video based on these settings. When importing, the Default distance setting is always the calibrated distance of 1 meter.
  • Page 58 This will take you back to the Replay screen. 6. Click the Glasses Tools button at the bottom and notice the gray interval with the distance you selected Multiple corrections can be made before clicking the Save changes button.

  • Page 59: Manual Coding

    Coding Scheme dialog box To set the Coding Scheme: 1. With Tobii Studio open to the appropriate glasses Project, click Tools in the menu bar and then select Coding Scheme. 2. Click a row in the Description column and type the name of the event (for example: Started Looking at Brand A, Stopped Looking at Brand A, Selected Brand B).
  • Page 60 User Manual B) Coding Events on the timeline To code: 1. Open the Replay tab and select the recording you want to begin to code. 2. For each recording, during playback use the shortcuts to log events, such as the start and stop of an action or individual action counts.
  • Page 61 Manual coding on multiple computers at once Any manual coding can also be done on several computers at the same time, providing they all have a valid Tobii Studio license, for example: 1 person is coding recording 1-20, another person could code 21-40 etc. To do this a single “Main”...

  • Page 62: Visualizations, Aoi's, And Statistics From Snapshots

    Creating Visualizations, AOIs, and Statistics Snapshots are used for creating Visualizations in Tobii Studio and for creating AOI’ s (Areas of Interest) which are important when conducting statistical analysis in the Statistics tab of Tobii Studio. After properly importing and preparing the Snapshots by following the instructions in this chapter, begin to create visualizations by opening the Visualizations tab in Tobii Studio.
  • Page 63 Step 1 To import an image as a Snapshot: 1. Open the File menu in Tobii Studio and select Import Image as Snapshot... Select an image of the AOA, taken with any digital camera, that shows at least 4 IR Markers. Open the image from its stored location.

  • Page 64: Snapshot Ir Marker Coverage

    Select the snapshots and click OK to add them to the Glasses tools IR Marker coverage overview. Hold the mouse cursor over a snapshot name to see a preview of the snapshot.
  • Page 65 Tobii Glasses Eye Tracker...

  • Page 66: Appendix I: Technical Specifications

    User Manual Appendix I: Technical Specifications Tobii Glasses Eye Tracker Eye tracking technique Pupil Centered Corneal Reflection, Dark pupil Eye tracking Monocular (right eye) Data rate 30 Hz Firmware Embedded Calibration procedure System guided (9 points) Post calibration Calibration validation...
  • Page 67 Tobii Glasses Eye Tracker Recording Assistant Display OLED, 160 x 128 pixels Touch sensitive controls & Controls rubber push keys SD-HC card slot Storage media (Tobii approved SD cards only) Maximum card size 4 GB Maximum file size per recording...
  • Page 68 IR Marker Holders Mounting screw holes, mounting tape surface 240 - for the recordings imported and analyzed with Tobii Studio versions 3.1 or higher and the latest firmware Unique IDs 120 - for the recordings imported and analyzed with Tobii Studio versions 3.0 and lower...

  • Page 69: Appendix Ii: Parallax Explained

    A parallax occurs because of the displacement of the scene camera in relation to the eye of the participant wearing the glasses. The images below (not drawn to scale) illustrate the viewing of an object at 3 different distances for three different Parallax settings.
  • Page 70 Tobii Support contact: SWEDEN/GLOBAL GERMANY NORTH AMERICA JAPAN +46 8 522 950 10 Phone +49 69 2475 034-27 Phone +1 703 738 1320 Phone +81-3-5793-3316 Phone support@tobii.com support@tobii.com support.us@tobii.com support.jp@tobii.com www.tobii.com www.tobii.com www.tobii.com www.tobii.co.jp Support hours: 9 am - 5 pm...

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