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What’s in a Smile? Initial Analyses of Dynamic Changes in Facial Shape and Appearance
- Damian J. J. Farnell,
- Jennifer Galloway,
- Alexei I. Zhurov,
- Stephen Richmond,
- David Marshall,
- Paul L. Rosin,
- Khtam Al-Meyah,
- Pertti Pirttiniemi and
- Raija Lähdesmäki
Single-level principal component analysis (PCA) and multi-level PCA (mPCA) methods are applied here to a set of (2D frontal) facial images from a group of 80 Finnish subjects (34 male; 46 female) with two different facial expressions (smiling and neu...

