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IEEE/ICACT20260151 Question.2 Questioner: taherul203158@gmail.com 2026-02-10 오후 7:39:53	IEEE/ICACT20260151 Answer.2 Answer by Auhor quandh13@fe.edu.vn 2026-02-10 오후 7:39:53
How does the MV-FER framework utilize the Facial Action Coding System (FACS) to improve facial expression recognition, and what role do AU-guided heatmaps play in the model?	Facial Action Coding System (FACS), originally proposed by Paul Ekman, is a source of structured anatomical knowledge. FACS decomposes facial expressions into Action Units (AUs), which correspond to fundamental facial muscle movements. Each basic emotion is associated with a characteristic combination of AUs that are localized to specific facial regions, providing a principled and interpretable representation of expressive facial behavior. Building on this knowledge, MV-FER constructs AU-guided heatmaps that encode these anatomically grounded AU–region relationships as explicit spatial priors. These heatmaps are used to guide the model’s spatial attention mechanisms, encouraging the network to focus on facial regions that are semantically and anatomically relevant to expression formation.

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