PerceptionLab

Eyetracking - seeing through the eyes of the user

Eye-tracking is a system, which is able to record eye movements of a subject, which can then be evaluated on different issues.

We use the eye tracking system to analyse the spatial perception, spatial orientation in rooms and buildings, and as well user behaviour. We have a mobile system which allows the free movement in space and hence the unimpeded investigation of the perception of spaces and objects in space allows.

The system consists of a recording device that absorbs the movements of the eye relative to the head and an associated computer software, which analyzes the incoming data and presents.

A helmet, on which the two cameras are mounted can be fixed on the head of the subject (head-mounted system). A scene camera records a video that matches the field of view of the subject, while the other (infra-red cover) camera records the eyes, which are illuminated by a faint infrared light (see explanatory diagram). The video images are analyzed by using an image processing software in relation to the movement of the pupil: its view position is determined and brought into conformity with the scene video.

The result is a video scene in which the exact view direction is shown with a cross hair, which is the pursuit of the exact path of the proband welcome sight during its operation.

This method can typically elucidate the following issues and questions:&nb

• What exactly is considered
• How often and how long certain areas will be looked at
• What will be closely considered and what is only superficially
• In what order the objects are fixed
• What areas to escape the attention
• What different people take different true (eg, persons interested in a subject in comparison) to be uninterested

There are the following limitatio

• It is possible to fix areas without actually having to be covered by the perception
• It cannot be made a statement about what is perceived on the periphery of the visual field

Eyetracking is a purely quantitative method, so it can only be established what is believed to equipment:

iViewX ™ HED by SMI:

Full mobile head-mounted eye tracking system

Video-based eye-tracking

Monocular, pupil-CR, Dark-pupil tracking

Sampling rate 50 Hz

Tracking resolution <0.1 ° (typ)

Gaze position accuracy <0.5 ° - 1 ° (typ.)

Scene video with cursor overlay host

 

 

 

 

Location:

Department 1, building 6 (former horse infirmary)

Room 6102

The eye tracking system is maintained by Christoph Pröls:

Contact:

Pröls Christoph, Dipl.-Ing.

Researcher

Room 6102

Phone +49 (0)5231 769 - 742

christoph.proels (at) hs-owl.de