Table 2.
Classification of macro-expression datasets according to their content.
| Expression Representation | Macro-Expression Datasets |
|---|---|
| Six basic expressions | MMI, USTC-NVIE, MMI-V, SFEW |
| Six basic expressions + neutral | iSAFE, AFEW, FER-2013 |
| Six basic expressions + neutral, pain | Hi4D-ADSIP |
| Six basic expressions + neutral, contempt | BAUM-2 |
| Six basic expressions (happiness or amusement, sadness, surprise or startle, fear or nervous, anger or upset, disgust) + embarrassment, pain | BP4D-Spontaneous |
| 23 categories of emotion | EmotioNet |
| Nine categories of emotions (no-face, six basic expressions, neutral, none, and uncertain) | FER-Wild |
| 13 emotional and mental states (six basic emotions plus boredom and contempt plus mental states, confusion, neutral, thinking, concentrating, and bothered) | BAUM-1 |
| Four emotions (sadness, surprise, happiness, and disgust) | ISED |
| One emotion (smile) | AM-FED, Smile dataset |
| Valence–arousal | AffectNet, DEAP, Aff-Wild, AVEC’14 |