Fig. 3

Significant Face Shape Features for Emotional Expression. The ten parameters with the lowest p-values for the expression groups, divided by face region: top half, middle half, and bottom half. The left face models depict the significant parameters when compared to the average neutral expression in FaReT space. The colors represent differences between the average (i.e., zero model) and the recovered template. The right graphic depicts which face features (names defined in FaReT) were significant and how they differ from the average model (arrows). “l/r” means both the left and right sides of that parameter were significant. 3D face images were rendered using a plugin from FaReT16 via MakeHuman15 v1.2 (www.makehumancommunity.org).