SMI RED250mobile, Руководство пользователя

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© 2015 SensoMotoric Instruments (SMI)
RED250mobile System User Guide
Page 150
15.8 Evaluating Eye Tracking Data
The fastest way to conduct and analyze eye tracking experiments is by
using SMI's comprehensive software package
Experiment Suite
TM
. Eye
tracking data is saved in a binary iView Data File (IDF) format. Also when
working with other applications, this data can be analyzed with SMI's
BeGaze
TM
analysis software, or processed with SMI's IDF Converter tool
for custom evaluation purposes.
15.8.1 Evaluation with SMI Experiment Suite
For most eye tracking experiments, the combination of using SMI
Experiment Center
TM
for experiment design and execution and BeGaze
TM
for analysis provides powerful and easy to use opportunities. Refer to
Experiment Center
TM
and BeGaze
TM
User Guides for further information.
When using Experiment Center for running the eye tracking study, make
sure that the proper geometry and tracking modes for the experiment are
selected in
iViewRED .
Also when working with other applications, the generated IDF file can be
analyzed with SMI's
BeGaze
TM
analysis software.When BeGaze
TM
loads
IDF files, it can automatically separate the data stream into single trials.
BeGaze
TM
uses messages of a defined format to achieve this trial
separation. When designing an experiment where later trial separation in
BeGaze
TM
is desired, use the SDK command
iV_SendImageMessage(
ImagePath )
at the point of the experiment when the trial separation is
desired. Refer to the SDK User Guide for further information.
15.8.2 Working with the iView Data File
The IDF file can be loaded either in BeGaze or into the IDF Converter ,
which exports various kinds of data, such as pupil size and position,
messages, trigger status and gaze position and into ASCII readable text for
custom evaluation.
The IDF Converter is part of the iTools package which can be downloaded
from the SMI web page.