Knowledge Base

Data Export

External Communication (API And Stimulus Presentation Tool)

External communication is needed when you use the Stimulus Presentation Tool. Also, with FaceReader, an Application Programming Interface (API) is included. This API allows you to analyze images or videos with FaceReader on one computer and send the logged data to an application on another computer. Our support department (see Help desk for contact information) can supply you with a detailed description of how to use the API functionality. They can also give you an example of an application that can receive FaceReader data.

Enable External Control (API)

Select this option when you want to use the Stimulus Presentation Tool and when you want to use the API functionality.

Default: Not selected.

External Connection Port

Specify the port through which the external application or the Stimulus Presentation Tool can connect to FaceReader. External applications can also receive the logged data through this port.

Default: 9090.

Please note that if you use The Observer XT 13 or higher versions with FaceReader 7 or higher, you do not use this setting, but connect with the Noldus network communication protocol N-Linx instead.

See External Communication (N-Linx)

Export With A Fixed Interval (5 Frames Per Second)

If this option is selected, an update to the Detailed log will be made every 200 milliseconds. If your computer cannot process the incoming images fast enough, frames will be skipped and a record with MISSING will be added to the Detailed log.

Default: Not selected.

External Communication (N-Linx)

N-Linx is a network communication protocol that enables data transfer between Noldus software. Use N-Linx if you have The Observer XT 13 or higher versions, and want FaceReader to start and stop analyzing together with an observation in The Observer XT. The FaceReader data are imported automatically into the observation and synchronized with the manual annotations.

If you do not use N-Linx, or if you have an older version of The Observer XT, you must export the FaceReader data and import them into The Observer XT manually. Data import with N-Linx is easier and faster and ensures synchronization. For this functionality to work, your license for The Observer XT must include the External Data Module.

Enable N-Linx

Select this option to start and stop FaceReader analysis together with an observation in The Observer XT and to import the data automatically in the observation.

N-Linx Server Address

Enter the IP address, or full computer name, of the computer with N-Linx Server.

If connection with N-Linx Server is established the text N-Linx connected appears in the upper right corner of your FaceReader window.

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