  This paper describes an approach to the facial action unit (AU) detection. In
this work, we present our submission to the Field Affective Behavior Analysis
(ABAW) 2021 competition. The proposed method uses the pre-trained JAA model as
the feature extractor, and extracts global features, face alignment features
and AU local features on the basis of multi-scale features. We take the AU
local features as the input of the graph convolution to further consider the
correlation between AU, and finally use the fused features to classify AU. The
detected accuracy was evaluated by 0.5*accuracy + 0.5*F1. Our model achieves
0.674 on the challenging Aff-Wild2 database.
