A research team at The University of Amsterdam and at NEMO in Amsterdam is collecting smiles — or at least moving images of smiles. Their database currently has about 400 smiles. They present this official description:
UvA-NEMO Smile Database is a large-scale smile database which has 1240 smile videos (597 spontaneous and 643 posed) from 400 subjects. Ages of subjects vary from 8 to 76 years. Videos are in RGB color and recorded with a resolution of 1920×1080 pixels at a rate of 50 frames per second under controlled illumination conditions. For further illumination and color normalization, a color chart is present on the background of the videos.
The data have contributed to at least one study:
(Thanks to investigator Diana Issidorides for bringing this to our attention.)