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A Review of Dynamic Facial Expression Recognition: Methods, Datasets and Directions
Proceedings of 2025 2nd International Conference on Machine Learning and Intelligent Computing, PMLR 278:171-180, 2025.
Abstract
Dynamic facial expression recognition (DFER) has emerged as an essential area of research in computer vision, with implications in human-computer interaction, psychological analysis, and security. Although image-based static facial expression recognition (SFER) is well-developed, DFER captures temporal dynamics, remains less explored. This paper comprehensively reviews DFER, focusing on feature extraction methods from traditional handcrafted features to advanced deep learning techniques, analyzing performance metrics, and examining publicly available datasets with their comparative characteristics. We discuss specific challenges faced by DFER systems such as occlusion, pose variations, and temporal alignment. Finally, we explore promising applications in healthcare and human-computer interaction, providing concrete implementation strategies and future research directions.