Aff-Wild2 database

Frames of Aff-Wild2, showing subjects of different ethnicities, age groups,  emotional states, head poses, illumination conditions and occlusions

Frames of Aff-Wild2, showing subjects of different ethnicities, age groups, emotional states, head poses, illumination conditions and occlusions

Affective computing has been largely limited in terms of available data resources. The need to collect and annotate diverse in-the-wild datasets has become apparent with the rise of deep learning models, as the default approach to address any computer vision task.
Some in-the-wild databases have been recently proposed. However: i) their size is small, ii) they are not audiovisual, iii) only a small part is manually annotated, iv) they contain a small number of subjects, or v) they are not annotated for all main behavior tasks (valence arousal estimation, action unit detection and basic expression classification).
To address these, we substantially extend the largest available in-the-wild database (Aff-Wild) to study continuous emotions such as valence and arousal. Furthermore, we annotate parts of the database with basic expressions and action units. We call this database Aff-Wild2. To the best of our knowledge, AffWild2 is the only in-the-wild database containing annotations for all 3 main behavior tasks. The database is also a large scale one. It is also the first audiovisual database with annotations for AUs. All AU annotated databases do not contain audio, but only images or videos.


The Aff-Wild2 is annotated in a per frame basis for the seven basic expressions (i.e., happiness, surprise, anger, disgust, fear, sadness and the neutral state), twelve action units (AUs 1,2,4,6,7,10,12,15,23,24,25, 26) and valence and arousal. In total Aff-Wild2 consists of 564 videos of around 2.8M frames with 554 subjects (326 of which are male and 228 female). All videos have been annotated in terms of valence and arousal. 546 videos of around 2.6M frames have been annotated in terms of the basic expressions. 541 videos of around 2.6M frames have been annotated in terms of action units. Aff-Wild2 displayes a big diversity in terms of subjects' ages, ethnicities and nationalities; it has also great variations and diversities of environments.

 


 

How to acquire Aff-Wild2


For more details about the database and the procedure for requesting access to it, please visit this website.