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SR Research EyeLink II Scene Camera User Manual

Eyelink ii scene camera
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EyeLink
II Scene Camera User Manual
(SceneLink Application version 1.2.1)
Copyright © 2004-2007 SR Research Ltd.
EyeLink is a registered trademark of SR Research Ltd., Toronto, Canada

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Summary of Contents for SR Research EyeLink II Scene Camera

  • Page 1 ® EyeLink II Scene Camera User Manual (SceneLink Application version 1.2.1) Copyright © 2004-2007 SR Research Ltd. EyeLink is a registered trademark of SR Research Ltd., Toronto, Canada...

  • Page 2: Table Of Contents

    Checking SceneLink Connections and Settings ..........26 3.7.1 Seeing Tracker Graphics ................28 3.7.2 Seeing a Gray Screen................28 3.7.3 Seeing a Black Screen................30 Performing Recording with the SceneLink Application .........32 EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 3 Playing back a Recording Session ..............51 Saving a Recorded Trial..................53 Mapping Gaze Data to Digital Video Coordinates and Getting Frame Number in the ASC File......................54 Exiting the SceneLink Application..............55 EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 4 Figure 2-2: EyeLink II Video Setup Screen ............... 7 Figure 2-3: EyeLink II Scene Camera Alignment Screen ..........11 Figure 2-4: EyeLink II Scene Camera Depth Setup Screen ..........13 Figure 2-5: EyeLink II Record Screen................15 Figure 3-1: Remove Screws on the Head Camera Bracket..........18 Figure 3-2: Insert Scene Camera between the Head Camera Clamp and the Head Camera Bracket ........................
  • Page 5 Table 1. Playback Trial Control..................52 CONTACT ADDRESS SR Research Ltd. 5516 Main St., Osgoode, Ontario, Canada K0A 2W0 Fax: 613-482-4866 Phone: 613-826-2958 Toll Free Phone: 1-866-821-0731 (North America Only) Email: support@sr-research.com http://www.sr-support.com/ EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 6: Introduction

    The composite output can then be displayed on a TV monitor and recorded by a VCR or DVD recorder. Alternatively, the SR Research SceneLink application can be used to save the scene camera video as digital video (in .AVI file format) without any gaze overlay graphics.

  • Page 7: Eyelink Ii Tracker Application: Scene Camera Components

    (see Figure 2-1) the eye and head tracking cameras can be set up, and their images can be thresholded. Eye(s) to be tracked, tracking mode and options can also be set. Calibration, validation, drift correction, and scene camera EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 8: Main Functions

    Here 250 Hz is selected. Note that in Pupil-CR mode, 500Hz is not available. Keys: F = toggles sampling Frequency selection Toggles display of crosshair in eye camera images. Keys: X = toggle crosshair display EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 9 This button is usually only accessed when using the EyeLink II in standalone mode. Keys: O = go to Output screen EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 10 Perform video overlay or scene camera setup. This is used to ensure accurate gaze position mapping onto the overlay device. If video alignment is not properly carried out, the accuracy of EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 11: Key Shortcuts

    Open the Help dialog, in the help screen there is a brief overview of the role of this page and the key functions for it Go to the Video Setup screen EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 12: Video Setup Screen

    Keys: Enter = return to camera setup Press Help (F1) to access the online help page for Camera Setup. All available key shortcuts are also listed on the Help EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 13 “Scenecam Mode” button should be disabled – as a result, the “Scenecam Align” and “Use Vergence” buttons will also be disabled on the camera setup screen. “Use Vergence”: If enabled, depth EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 14 AVI clip and the EDF timing. Keys: V = Show video alignment pattern; M = Toggle on/off the machine-readable timecode line Several cursor colors can be selected from the Video Setup screen, the most EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 15: Key Shortcuts

    Move the selected corner of the overlay window Toggle the corner of overlay window to move Reset overlay window to default position Enter / ESC Return to Set Options screen HELP (this screen) EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 16: Scene Camera Alignment Screen

    Keys: Enter = return to camera setup Press Help (F1) to access the online help page for Camera Setup. All available key shortcuts are also listed on the Help screen. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 17: Key Shortcuts

    Keys: L = Select the scene camera lens type 2.3.3 Key Shortcuts Function Select the scene camera lens type; Enter / ESC Return to Set Options screen HELP (this screen) 2.4 Scene Camera Depth Setup Screen EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 18: Purpose

    If pressed, this will clear all of the data points collected for depth adjustment. Keys: R = Restart collection (clear data). If pressed, this will keep the existing data points collected and improve upon EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 19: Key Shortcuts

    Enter / ESC Return to Set Options screen HELP (this screen) Binocular / Cyclopean cursors Enable/Disable vergence correction Restart collection (clear data) Improve last fit Revert to last entry or restart EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 20: Record Screen

    If enabled, draws a single gaze cursor, representing the average of the two eyes. If disables, gaze cursors are drawn separately for each eye. Keys: B = Binocular or Cyclopean gaze EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 21: Key Shortcuts

    Online offset correction Cyclopean binocular display After Trial Aborted Setup (Calibrate, camera setup) Repeat Trial Next Trial CTRL + ALT + T Terminate Experiment CTRL + ALT + Q Terminate program EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 22: Setting Up And Configuring The Scenelink Application

    3.2 Installing Scene Camera If the scene camera option is purchased after the base system, follow the instructions below for installing the scene camera on the headband: EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 23: Figure 3-1: Remove Screws On The Head Camera Bracket

    Use an SR Research supplied screwdriver to remove the four screws on the head camera bracket (see Figure 3-1). Figure 3-1: Remove Screws on the Head Camera Bracket Insert the scene camera bracket between the head camera bracket and the head camera clamp (see Figure 3-2).

  • Page 24: Wiring And Configuration

    Installation” of EyeLink ® II Installation Guide). • Set up the green AVT 3170 Overlay Box, including all cabling and settings configuration. • Set up the ADVC Digital Video (DV) converter box. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 25: Setting Up The Overlay Box

    “S-OUT” and the S-Video input of the DV Converter. • Plug in the power adapter of the overlay box. • For best overlay quality, the following settings may be used: Overlay (Key) switch: black TV System: NTSC. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 26: Setting Up The Digital Video Converter

    L/R RCA jack at the front (or the “Audio In” minijack at the back, depending on the cable and converter used). In addition, the user should check for the settings of the mode switch selectors at EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 27: Using A Dell D-Series Laptop As Host Pc

    This will bring up a “DirectX Diagnostic Tool” dialog box (see Figure 3-6). If an older version of DirectX was installed on your computer, the user should download the latest version from http://www.microsoft.com/windows/directx/default.mspx. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 28: Checking Firewire Connection

    SceneLink application from “Start → Programs → SR Research EyeLink → Scene Camera” of the display PC. The scene camera application should start up. If you see the following warning information (see Figure 3-7), please check: EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 29: Configuring Scenelink Options

    DV converter box. If multiple audio cards installed on the display PC, the “Audio Output” setting allows the user to choose the correct audio device for audio data playback. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 30: Figure 3-8. General Tab Of The Preferences Dialog Box

    (panning or wrapping around) can also be adjusted. Figure 3-9. Strip Chart Tab of the Preferences Dialog The SceneLink software can send out TTL signals to a third-party acquisition device/computer synchronization purposes (see section “4.8.2 EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 31: Checking Scenelink Connections And Settings

    Make sure “Enable Overlay” button is enabled. Next, click on “Video Setup” button. Make sure both “Scenecam Mode” and “Use Vergence” buttons are enabled. Press button 5 of the overlay remote control to set the overlay box to 2× zoom. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 32: Figure 3-11. Openning A Recording Session

    Figure 3-12. Initial View of the SceneLink Application The following sections illustrate initial screens the user may see if the scene camera option is not properly set up: • Seeing tracker graphics (section 3.7.1) EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 33: Seeing Tracker Graphics

    “Scenecam Mode” and “Use Vergence” buttons are enabled. • If you don’t see the “Enable Overlay” button at the bottom right corner of the Set Options screen, quit the EyeLink host application. Do a search EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 34: Figure 3-14. Gray Background Over Video, Check Eyelink2 Settings

    "vidovl.ini" // vidovl settings include "scenecam.ini" // scene camera setting Figure 3-14. Gray Background Over Video, Check EyeLink2 Settings EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 35: Seeing A Black Screen

    1) Does the type of scene camera video output cable match the setting of video source input in the overlay box (i.e., “S-IN” when S-video input is used and “V-IN” when composite video input is used)? EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 36: Figure 3-16. Blank Screen In The Video Window

    The converter has difficulty in detecting the video source if the red light is on. Check for the possibility of having loose connections. Figure 3-16. Blank Screen in the Video Window EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 37: Performing Recording With The Scenelink Application

    Each of the above modes is entered by clicking on the corresponding display mode button (see Figure 4-1). EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 38: Idle (Preview) Mode

    When this mode is entered, some line drawings are added to the scene camera video and a “Video Alignment” dialog box is displayed (see Figure 4-3), followed by a “Detect EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 39: Figure 4-3. Adjusting The Size Of Overlay Display

    (see Figure 4-4). If the gray box does not appear, please check the “Video Setup” screen of the host PC to make sure the “Video Ref Pattern” EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 40: Figure 4-4. Beginning Display Area Detection

    “Detect Display Area” dialog box). However, if the reference pattern is not displayed even when the vertical and horizontal thresholds are adjusted close to 0, please contact SR Research Ltd. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 41: Scene Camera Alignment Mode

    Note: A 95º lens has a diameter of 17.0 mm measured from the left end to right end (including the black edge); 13.5 mm measured from the inner ring (glass part only). A 72º lens has a EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.
  • Page 42 However, it is a good practice to check the alignment at the beginning of each recording session. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 43: Calibration Mode

    PC keyboard. Note that several types of calibration algorithms have been provided by SR Research Ltd. If a large calibration region is involved in an experiment, the “HV13” calibration type (selected from the “Set Options” screen) EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 44: Calibration Colors

    “View -> Physical Coordinate Settings” and check the “Overwrite Physical.ini settings” option. Clicking on the “Read From Host” button will load in the current values set in the physical.ini file. Figure 4-7: Updating Physical Coordinate Settings EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 45: Depth Correction Mode

    This error is caused by the difference in the viewing angles between the scene camera and the eyes (i.e., parallax error). Therefore, a depth correction following calibration is critical for any experiment involving viewing targets at different viewing depths. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 46: Figure 4-8. Calibrated Space Viewed In The Overlay Display

    For a calibration that is done close to the participant, the second point of the depth correction should be placed at a point in the calibrated space that is distant from the participant, and vice versa. As a rule of thumb, EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 47: Output Mode

    4.7 Output Mode The output mode ( ) is used to manually track and record eye movements. This mode must be entered before a trial recording can be performed. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 48: Record Mode

    Please note that a warning message “GAZE CURSORS DISABLED INI FILE OR COMMAND” will be printed out on the host screen if the recording is controlled by the SceneLink application – this is done by design. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 49: Problem With Recording

    EyeLink host computer. Please make sure you have installed the DriverLINX Port I/O Driver to support this capability. Before EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 50: Performing Online Drift Correction

    PC mouse, place the cursor over the fixation target and click the right mouse button once. The drift correction may fail if there is no stable fixation data or if EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 51: Online Drift Correction From The Host Pc

    If the data quality is not improved following the drift correction, the experimenter should check the camera setup and redo calibration, validation, and depth setup. Figure 4-12. Performing Online Drift Correction EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 52: Recording Options

    Select the cursor appearance by clicking on the appropriate button in the “Cursor Shapes” section. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 53: Strip Chart

    4.11 Closing Recording Session A recording session can be closed by clicking “File → Close”. This will close all of the EyeLink and scene camera recordings. The EDF file will also be EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 54: Exiting The Scenelink Application

    “File → Close” to close the current recording session. Click “File → Exit” or the close button on the top-right corner to close the SceneLink application. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 55: Data Playback With Scenelink Application

    “Create lookup table for all trials” checkbox or to select some of the trials in the list to process those selected ones only. Figure 5-1. Creating Lookup Table for a Recording EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 56: Playing Back A Recording Session

    Backward Control: Steps back 1 frame of video Fast Forward Control: Steps forward 5 frames of video. Forward Control: Steps forward 1 frame of video. Play Control: Starts playing back the trial data. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 57: Figure 5-3. Scene Camera Recording Playback

    To ensure the audio data is played correctly, make sure your audio device setting is correct (View -> Preferences -> “Audio Output”). In addition, you should EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 58: Saving A Recorded Trial

    To save an .avi file for the trial recording, user can select “File -> Save AVI with Overlay” (see Figure 5-5). The saved video clip contains both the scene video as well as the overlay graphics such as EDF time, current gaze position, and EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 59: Mapping Gaze Data To Digital Video Coordinates And Getting Frame Number In The Asc File

    Please make sure you have made these changes before loading the intended EDF file. 2) The following variables added Sample Report Saccade/Fixation Report. • Sample Report: EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

  • Page 60: Exiting The Scenelink Application

    Before exiting the application by clicking “File → Exit”, please make sure you have closed all of the playback activities and clicked “File → Close” to close the current playback session. EyeLink II Scene Camera User Manual © 2004-2007 SR Research Ltd.

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