Download UserManual - Andrew T. Duchowski

User Manual - Tobii Studio 2.X
5. To smooth the image and apply the color values, the peak of the highest distribution is set to 1
and all the other distributions peaks are recalculated in reference to that distribution. The color is
then linearly mapped along the distribution with the highest value 1= red, middle value 0.5 =
yellow and low value 0=green (default colors; can be changed).
6. If you change the maximum color value in the display settings (field) of the heat map, you change
how the color is mapped to each distribution. Lowering the values will produce more warm areas.
7. If you increase the Kernel value of the heat map you will expand the area of each cspline
distribution, causing more fixation color distributions to overlap, and consequently increasing the
size and number of warm areas on your heat map.
7.6 Creating clusters
The Cluster visualization is a graphic representation of areas with high concentrations of gaze data points
(clusters), superimposed on a background image. This type of visualization can be used to calculate
clusters of raw gaze data that indicate regions of interest, or similarly to Count, heat maps display the
areas with a high fixation density. The fixation data contained in each cluster can be further analyzed by
automatically generating AOIs and calculating eye tracking metrics based on those AOIs.
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