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. Author manuscript; available in PMC: 2015 Oct 24.
Published in final edited form as: Proc Eye Track Res Appl Symp. 2014 Mar;2014:67–74. doi: 10.1145/2578153.2578161

Figure 3.

Figure 3

Effect of modifying spatial parameters on standard greedy dispersion fixation algorithms. The gaze trajectory is shown moving through time vertically and projects onto the face image above and below. Top Left: With a large spatial parameter the cylinder covering the gaze trajectory is thicker, and fewer cylinders are needed to cover the trajectory. Top Right: With a smaller spatial parameter more cylinders are necessary. Representative example of a single trial. Bottom Left: Number of fixations N(s) as a function of s, the size of the spatial parameter for the distance algorithm (i.e. the maximal separating distance between points). Bottom Right: log-log plot of the bottom left plot. The line between points shows the theoretical line calculated by least-squares fit of a line to the log-transform of the set of points.