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Technical Report for Valence-Arousal Estimation in ABAW2 Challenge

In this work, we describe our method for tackling the valence-arousal estimation challenge from ABAW2 ICCV2021 Competition. The competition organizers provide an inthe-wild Aff-Wild2 dataset for participants to analyze affective behavior in real-life settings. We use a two stream model to learn emotion features from appearance and action respectively. To solve data imbalanced problem, we apply label distribution smoothing (LDS) to re-weight labels. Our proposed method achieves Concordance Correlation Coefficient (CCC) of 0.591 and 0.617 for valence and arousal on the validation set of Aff-wild2 dataset.