Although the most important AOIs will always
be in the center of the initial cloud, a large number
of AOIs and videos might reduce the readability of
the visualization. Therefore, the scalability of our
approach can be improved with additional filtering
of the AOIs and video segments. By thresholding
the attention values, AOIs that received less attention
than the given threshold could be removed
from the visualization. The same approach could
be applied to the video segments of an AOI.