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arXiv · 2607.10860

AU-Guided Synthetic Video Generation for Micro-Expression Recognition

Pei-Sze Tan·Sailaja Rajanala·Yee-Fan Tan·Raphael C. -W. Phan·Huey-Fang Ong
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Abstract

Micro-expression recognition is limited by the small scale, narrow demographic coverage, and restricted emotion labels of existing datasets. We introduce EquiME, a synthetic micro-expression dataset built from AU-guided image-to-video generation. EquiME contains 75K videos generated from 15K source face images across five target emotions, together with automatically inferred demographic metadata and video-quality measurements. We evaluate EquiME using frame-pair similarity, spatial variation, and no-reference perceptual-quality metrics, together with cross-dataset MER experiments on SAMM and CASME II. Models trained on EquiME achieve competitive cross-dataset performance on SAMM and CASME II and show comparatively low variation across the four evaluated architectures. This paper focuses on the dataset design, the structured AU-conditioning pipeline used for video generation, and the empirical evidence needed to assess EquiME as a synthetic MER resource. Project page: https://kirito-blade.github.io/me-vlm/

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Pei-Sze Tan, Sailaja Rajanala, Yee-Fan Tan, Raphael C. -W. Phan, Huey-Fang Ong. 2026-07-12. AU-Guided Synthetic Video Generation for Micro-Expression Recognition. https://arxiv.org/abs/2607.10860

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