VelocityChart
Contents
1. Tobii Technology VelocityChart Version 1 0 tobii LEADING EYE TRACKING TECHNOLOGY TOBII Trademark is the property of Tobii Technology tobii Preface VelocityChart is a separate application complementary to Tobii Studio The main purpose of VelocityChart is to help the user set the parameters in the data processing functions particularly when using the I VT fixation filter in Tobii Studio VelocityChart plots the angular eye velocity gaze coordinates raw or processed and the classified fixation coordinates of a recording VelocityChart can only be applied on recordings made with Tobii Studio 2 3 or later The menu option Launch VelocityChart will appear grey for recordings made with previous versions of Tobii Studio Important notifications e VelocityChart is a separate application adjustments to the fixation filter parameters within VelocityChart need to be transferred to Tobii Studio to have an impact on replay visualizations statistics and text export The transfer procedure is described in the Using the Velocity Chart to tune the I VT fixation filter section e VelocityChart can only be applied on recordings made with Tobii Studio 2 3 or later The menu option Launch VelocityChart will appear grey for recordings made with previous versions of Tobii Studio e VelocityChart only supports the Raw data filter and the I VT fixation filter e VelocityChart plots one recording at the time Adjusting the data process2. in the calibration results see Tobii Studio User Manual section 4 3 2 Making recordings To apply the I VT fixation filter in VelocityChart In the Menu bar click Settings Select Filter Settings The dialog box has the same layout as the Fixation filter dialog in Tobii Studio The startup parameter values in VelocityChart fixation filter dialog have been retrived from the same parameters set in Tobii Studio 3 In the Fixation filter dialog box select I VT fixation filter in the Fixation filter drop down menu To zoom in to a representative part of the recording 1 In VelocityChart create a zoom window with the mouse by pressing the left mouse button while dragging the mouse along the timeline and then releasing the mouse button 2 Adjust the zoom window by dragging the scroll box in the horizontal scroll bar EE Velocinychart Rac 03 File Settings 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 7 Tobii Technology in the United States and or other countries www tobii com tobii To adjust the parameters in VelocityChart fixation dialog box 1 In the VelocityChart Fixation filter dialog box adjust the parameters to obtain a suitable fixation classification Finding the best parameters values to fit all recordings while still preserving fine grained fixations is a complicated task that requires training and experience The def
3. by 5 Rec 03 Shaw 7 MO Reo Filter by cat leans Delete Recording Filter by text Start RTA for Recording Category ime Note Consider using a recording where the level of noise is relatively high An indication of noise level may be the percentage of samples that was collected or if you noticed that the calibration of a specific participant showed long error vectors green lines in the calibration results see Tobii Studio User Manual section 4 3 2 Making recordings To apply the Raw data filter in VelocityChart In the Menu bar click Settings Select Filter Settings The dialog box has the same layout as the Fixation filter dialog in Tobii Studio The startup parameter values in VelocityChart fixation filter dialog have been retrieved from the same parameters set in Tobii Studio 3 Inthe Fixation filter dialog box select Raw data filter in the Fixation filter drop down menu To zoom in to a representative part of the recording 1 In VelocityChart create a zoom window with the mouse by pressing the left mouse button while dragging the mouse along the timeline and then releasing the mouse button 2 Adjust the zoom window by dragging the scroll box in the horizontal scroll bar VelocityChar Rec 01 Number of faston 1833 File Settings 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 5 Tobii Technology in the United S
4. ate one gaze data point to another in time ScreenX X coordinate for the processed data point mapped tothe mm media coordinate system where the origin for the coordinate system is the lower left corner of the tracking plane ScreenY Y coordinate for the processed data point mapped to the mm media coordinate system where the origin for the coordinate system is the lower left corner of the tracking plane Velocity Estimated velocity of data points measured in degrees second degrees second FixationX X coordinate for classified fixation point mapped to the mm media coordinate system where the origin for the coordinate system is the lower left corner of the tracking plane FixationY Y coordinate for classified fixation point mapped to the mm media coordinate system where the origin for the coordinate system is the lower left corner of the tracking plane IsFixation Data field showing 1 where a data point has been classified fixation 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 10 Tobii Technology in the United States and or other countries www tobii com Tobii Support contact SWEDEN GLOBAL 46 8 522 950 10 Phone support tobii com www tobii com Support hours 9 am 5 pm Central European Time GMT 1 GERMANY 49 69 2475 034 27 Phone support tobii com www tobii com Support hours 9 am 5 pm Central European Tim
5. ault values have been set to work in most cases These release notes will not cover the methods of evaluating different parameter settings 2 Click Apply to apply the changes in VelocityChart Fixation filter parameters in VelocityChart do not affect fixation filter parameters in Tobii Studio To apply VelocityChart s Raw filter parameters values in Tobii studio 1 In VelocityChart s Fixation Filter settings dialog click Save filter config The Save fixation filter configuration to file dialog opens Select location and enter a file name for the filter the configuration file Click save Open the Fixation filter dialog in Tobii Studio The Fixation filter dialog is found in the Settings dialog in the Tools menu 5 Click Load filter config Note Make sure you are in the Fixation filter dialog in Tobii studio and not the one in VelocityChart 6 Locate the configuration file in the Load fixation filter configuration from file dialog 7 Double click the filter configuration file to open it in Tobii Studio Click Apply The settings can also be transferred simply by entering the parameter values from the fixation filter dialog in VelocityChart into the Fixation filter dialog in Tobii Studio by hand 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 8 Tobii Technology in the United States and or other countries www tobii com tobil 4 Exporting ga
6. e GMT 1 NORTH AMERICA 1 703 738 1320 Phone support us tobii com www tobii com Support hours 8 am 5 pm US Eastern Standard Time GMT 6 JAPAN 81 3 5793 3316 Phone support jp tobii com www tobii co jp Support hours 9 am 5 30 pm GMT 9 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 their respective owners HEADQUARTERS SWEDEN Tobii Technology AB LEURE T 104 B Box 743 S 182 17 Danderyd CENTRAL EUROPE Tobii Technology GmbH Niedenau 45 D 60325 Frankfurt am Main Germany 49 69 24 75 03 40 Phone 49 69 24 75 03 429 Fax sales de tobii com Sweden 46 8 663 69 90 Phone 46 8 30 14 00 Fax sales tobii com NORTH AMERICA Tobii Technology Inc 510 N Washington Street Suite 200 Falls Church VA 22046 USA 1 703 738 1300 Phone 1 888 898 6244 Phone 1 703 738 1313 Fax sales us tobii com JAPAN Tobii Technology Ltd 3 4 13 Takanawa Minato ku Tokyo 108 0074 Japan 81 3 5793 3316 Phone 81 3 5793 3317 Fax sales jp tobii com CHINA Tobii Electronics Technology Suzhou Co Ltd No 678 Fengting Avenue Land Industrial Park Weiting Suzhou Post code 215122 China 86 13585980539 Phone sales cn tobii com tobii www tobii com
7. e transferred simply by entering the parameter values from the fixation filter dialog in VelocityChart into the Fixation filter dialog in Tobii Studio by hand 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 6 Tobii Technology in the United States and or other countries www tobii com tobil 3 Using VelocityChart to tune the I VT fixation filter VelocityChart is a separate software application but is launched from within Tobii Studio 2 3 To launch the VelocityChart application 1 Select the Replay tab in Tobii Studio 2 Inthe Recordings pane right click on the recording you want to open in VelocityChart Click Launch VelocityChart The VelocityChart opens in a new window Name Date v Samples Rec 10 2011 04 08 15 28 50 92 R 09 2011 04 08 15 07 23 97 R 08 2011 04 08 15 01 56 91 oO a 5 Rec07 2011 04 08 14 49 32 94 8 Rec 06 2011 04 08 14 38 35 95 Rec05 2011 04 08 14 28 41 98 O Rec 04 Sort by Fee 03 Show gt LIQ Rec02 aunch VelocityChart Filter by cat tale a Delete Recording Filter by text Start RTA for Recording Category ime roat Note Consider using a recording where the level of noise is relatively high An indication of noise level may be the percentage of samples that was collected or if you noticed that the calibration of a specific participant showed long error vectors green lines
8. elect the Show Velocity check box to show the angular velocity Only applicable using the I VT fixation filter 5 Type in the number of data points to include in the chart in the Max samples field Note Maximum number is 4000 Charting always starts at the first sample To plot recordings longer than 4000 samples or segments of recordings further into the recording than 4000 samples export gaze velocity and fixation data from VelocityChart see below and plot data in Excel SPSS Matlab etc 6 Set the scale on the Y axis by typing in the maximum Y value in the Set Max Y field 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 4 Tobii Technology in the United States and or other countries www tobii com tobil 2 Using VelocityChart to tune the Raw data filter VelocityChart is a separate software application but is launched from within Tobii Studio 2 3 To launch the VelocityChart application 1 Select the Replay tab in Tobii Studio 2 Inthe Recordings pane right click on the recording you want to open in VelocityChart Click Launch VelocityChart The VelocityChart opens in a new window Name Date v Samples Rec10 2011 04 08 15 28 50 92 Rec09 2011 04 08 15 07 23 97 Rec08 2011 04 08 15 01 56 91 Re07 2011 04 08 14 49 32 4 Rec06 2011 04 08 14 38 35 95 Rec05 2011 04 08 14 28 41 98 m Recordings Rec 04 sort
9. ing parameters to fit all recordings while still preserving fine grained fixations is a complex task that requires training and experience The default values have been set to work in most cases Software Release 1 0 This document contains information proprietary to Tobii Technology AB The contents are confidential and any disclosure to persons other than officers employees agents or subcontractors of the owner or licensee of this document without the prior written consent of Tobii Technology AB is strictly prohibited No part of this publication may be reproduced stored in retrieval system or transmitted in any form or by any means electronic or mechanical including photocopying and recording without the prior consent of the copyright holder User Guide release 1 0 May 2011 Tobii Technology AB reserves the right to change the content of this user guide without prior notice Changes due to typographical errors inaccuracies or modifications in programs and or equipment might be implemented at any time Please check the Tobii web site www tobii com for updated versions of this document All rights reserved Tobii Technology AB Table of Contents t VeElOCItYy CRAM OVERWI GW sikinin cxcussicscuaets codeise Sentence save dienvaiees ceiedin Ee area Ea cacdvavagenQeaseceosdvade 3 L1 Melocity Chart Settin ess scccz issccdisees tases eea a Ea AN odendbecausuavexaducaadanedenfanloseesss 4 2 Using VelocityChart to tune the Raw data filte
10. r cccccsccsscssssccseessseeesseeseeecsaeessseessseeseaeeseseeesateeueseseees 5 3 Using VelocityChart to tune the I VT fixation filter oo ccc ccccccccsssececsssceceessseceesseecesssseecessseeceseeecesaeeees 7 4 Exporting gaze velocity and fixation data from VelocityChart ccscccssccsssecsseccssscessecsseecseeseseessseesentes 9 AT EXPOrtsCOVUMANS Aa a E AE E A E E E A E E dhesesaviveseonast 10 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 2 Tobii Technology in the United States and or other countries www tobii com tobil 1 VelocityChart Overview VelocityChart in Tobii Studio plots the angular eye velocity gaze coordinates raw or processed and the classified fixation coordinates of a recording The main purpose of VelocityChart is to help the user set the parameters in the data processing functions particularly when using the I VT fixation filter Below a VelocityChart showing eye tracking data on a timeline a it VelocityChart Rec 02 Numba of fixations 53 Total fixation duration 00 00 21 8768670 Settings VelocityChart v Filter settings PASA a isd Wa Mall aAMt Ala aval Falla la AdactMa inal Un ILodMhciad bal ocala dass F 0 DAN 600 a v D a Ez n a D 2 D E E 0 Seconds lt x De Y lt P FixstionX gt FixaonY Fixstion J Velocity The s
11. tates and or other countries www tobii com tobii To adjust the parameters in VelocityChart fixation dialog box 1 In VelocityChart Fixation filter dialog box adjust the parameters to obtain suitable data processing Finding the best parameters values to fit all recordings while still preserving fine grained eye tracking data is a complicated task that requires training and experience The default values have been set to work in most cases These release notes will not cover the methods of evaluating different parameter settings 2 Click Apply to apply the changes in VelocityChart Fixation filter parameters in VelocityChart do not affect fixation filter parameters in Tobii Studio To apply VelocityChart s Raw filter parameters values in Tobii studio 1 In VelocityChart s Fixation Filter settings dialog click Save filter config The Save fixation filter configuration to file dialog opens Select location and enter a file name for the filter configuration file Click save Open the Fixation filter dialog in Tobii Studio The Fixation filter dialog is found in the Settings dialog in the Tools menu 5 Click Load filter config Note Make sure you are in the Fixation filter dialog in Tobii studio and not the one in VelocityChart 6 Locate the configuration file in the Load fixation filter configuration from file dialog 7 Double click the filter configuration file to open it in Tobii Studio Click Apply The settings can also b
12. traight red line in VelocityChart above shows the Velocity threshold in the I VT fixation classifier The other lines described on the chart legend are X Y gaze coordinates raw or processed mm Fixation X Fixation Y Fixation coordinates mm Fixation Indicates fixations found Velocity Absolute value of the eyes angular velocity degree second 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 3 Tobii Technology in the United States and or other countries www tobii com tobil 1 1 VelocityChart settings Within the VelocityChart application settings control what data is shown in the chart The VelocityChart Fixation Filter dialog is launched through the settings menu Filter Settings sour SR Gaze data Preprocessed Bo Show Fixations Show Velocity Wi Max samples 4000 Max Y 600 Rr RE i 1 ai aa To change the Velocity Chart settings imeters degrees s 1 Click the Show X Y drop down menu and select what gaze coordinate data should be shown fixation coordinates included 2 Click the Gaze data drop down menu and select how data should be processed before it is shown Note Preprocessed meaning according to fixation filter settings Data processing functions implied Gap fill in and Noise reduction Eye Selection cannot be disabled 3 Select the Show Fixations check box to show fixations in the chart S
13. ze velocity and fixation data from VelocityChart The VelocityChart application enables velocity data to be exported All data processing function parameters are presented in the header of the text export The output format of the text export is a tab separated text file This format can be opened using Excel SPSS Matlab or any other text editor of your choice To export gaze velocity and fixation data from VelocityChart 1 Open the File menu and click Text Export File Settings Text export Text export to clipboard Exit Alt F4 400 2 In the Save fixation filter configuration to file dialog select location and enter the file name for text jegrees s export file 3 Click save Text can also be exported by simply clicking Text export to clipboard and then paste copied data in Excel SPSS Matlab or any other text editor 2011 Tobii Technology All rights reserved Tobii Technology and the Tobii logo are either registered trademarks or trademarks of 9 Tobii Technology in the United States and or other countries www tobii com tobii 4 1 Export columns The table below shows the data exported VelocityChart text export columns Column name Description Index Indexes for the data points values corresponding to the order of the data point TimeStampMilliSec Absolute timestamp in server time This timestamp is not ms synchronized with the local time and should only be used to rel
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