Are you really smiling at me? spontaneous versus posed enjoyment smiles

Authors:
Hamdi Dibeklio$#287/lu;Albert Ali Salah;Theo Gevers
Affiliations:
Intelligent Systems Lab Amsterdam, University of Amsterdam, Amsterdam, The Netherlands;Department of Computer Engineering, Bo$#287/azi$#231/i University, Istanbul, Turkey;Intelligent Systems Lab Amsterdam, University of Amsterdam, Amsterdam, The Netherlands
Venue:
ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part III
Year:
2012

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Abstract

Smiling is an indispensable element of nonverbal social interaction. Besides, automatic distinction between spontaneous and posed expressions is important for visual analysis of social signals. Therefore, in this paper, we propose a method to distinguish between spontaneous and posed enjoyment smiles by using the dynamics of eyelid, cheek, and lip corner movements. The discriminative power of these movements, and the effect of different fusion levels are investigated on multiple databases. Our results improve the state-of-the-art. We also introduce the largest spontaneous/posed enjoyment smile database collected to date, and report new empirical and conceptual findings on smile dynamics. The collected database consists of 1240 samples of 400 subjects. Moreover, it has the unique property of having an age range from 8 to 76 years. Large scale experiments on the new database indicate that eyelid dynamics are highly relevant for smile classification, and there are age-related differences in smile dynamics.