Knowledge Base

Set Up FaceReader To Work With The Observer XT

Procedure

1. Choose File > Set Default camera, choose your camera and select the option Record.
2. Choose File > Settings > Data Export.
3. Under External Communication (N-Linx), select Enable N-Linx.
4. If FaceReader and N-Linx Server run on the same computer, leave the default address localhost in the N-Linx server address field. If the programs run on different computers, enter the IP address or computer name of the computer with N-Linx Server. To find that name, open the Control Panel and choose System.
5. In the N-Linx server port field, leave the default port 5672. Ask your system administrator for assistance if this port is in use by another program.
6. Under Export (Detailed Log, ODX, N-Linx and API), choose which data to send to The Observer XT.

Application Settings - Data Export

Export (Detailed Log, ODX, N-Linx and API)

• Action units
  • Export action units as continuous values
  • Export the unilateral action unit intensities (left and right)
• Consumption behavior
• Custom expressions
• Facial states
• Gaze data
• Gaze angles
• Head orientation
• Head position
• Vital signs
• Valence and arousal
• Expressions from voice

Set Up The Observer XT To Work With FaceReader

Prerequisites

• FaceReader is open.
• You followed the steps in Set up FaceReader to work with The Observer XT

Procedure

1. In The Observer XT, open your project and choose File > Preferences > N-Linx Settings.
2. Select Use N-Linx server to connect with other applications.
3. In the Services address field, enter the name of the computer with N-Linx Server. Enter localhost if N-Linx Server and The Observer XT run on the same computer.
4. In the Services port field, leave the default port 5672. Ask your system administrator for assistance if this port is used by another program.
5. Click Test connection. If connection with N-Linx Server is found, the Status will change to Connected. If not, enter the correct settings and click Test connection again.
6. Click OK.
7. Choose Setup > Project Setup.
8. Select Live Observation. The Devices window now opens. If not, click the Devices button.
9. Double-click the line FaceReader -[computer name]
10. If you have multiple instances of FaceReader connected to The Observer XT, enter a unique name in the Identify device as field. This name will be added as Subject to the Coding Scheme.

    If you leave the Identify device as field empty, no subject will be added.

11. Select the FaceReader settings for your experiment.

    For an explanation of the settings, see:

    Smoothen classifications – Classification

    Continuous calibration – Procedure

    To use Participant calibration (see Create a participant calibration), select that option manually in FaceReader.

    Face model – Active Face Model

    Image rotation – Rotation

12. Click OK and select the checkbox in front of the line FaceReader -[computer name].

Source: FaceReader 10 Reference Manual (Help), Noldus Information Technology