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. Author manuscript; available in PMC: 2016 Jun 23.
Published in final edited form as: IEEE Int Conf Autom Face Gesture Recognit Workshops. 2015 May;1:10.1109/FG.2015.7163082. doi: 10.1109/FG.2015.7163082

Fig. 9.

Fig. 9

An illustration of a mother-infant interaction during a Face-to-Face (FF) session. y-axis denotes the projected features onto the first principal component. Red framed rectangles indicate the discovered dyadic smiling faces; gray rectangles indicate other sampled frames.