Grounding Emotion Recognition with Visual Prototypes: VEGA -- Revisiting CLIP in MERC
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912536225382400 |
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| author | Hu, Guanyu Kollias, Dimitrios Yang, Xinyu |
| author_facet | Hu, Guanyu Kollias, Dimitrios Yang, Xinyu |
| contents | Multimodal Emotion Recognition in Conversations remains a challenging task due to the complex interplay of textual, acoustic and visual signals. While recent models have improved performance via advanced fusion strategies, they often lack psychologically meaningful priors to guide multimodal alignment. In this paper, we revisit the use of CLIP and propose a novel Visual Emotion Guided Anchoring (VEGA) mechanism that introduces class-level visual semantics into the fusion and classification process. Distinct from prior work that primarily utilizes CLIP's textual encoder, our approach leverages its image encoder to construct emotion-specific visual anchors based on facial exemplars. These anchors guide unimodal and multimodal features toward a perceptually grounded and psychologically aligned representation space, drawing inspiration from cognitive theories (prototypical emotion categories and multisensory integration). A stochastic anchor sampling strategy further enhances robustness by balancing semantic stability and intra-class diversity. Integrated into a dual-branch architecture with self-distillation, our VEGA-augmented model achieves sota performance on IEMOCAP and MELD. Code is available at: https://github.com/dkollias/VEGA. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_06564 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Grounding Emotion Recognition with Visual Prototypes: VEGA -- Revisiting CLIP in MERC Hu, Guanyu Kollias, Dimitrios Yang, Xinyu Computer Vision and Pattern Recognition Multimodal Emotion Recognition in Conversations remains a challenging task due to the complex interplay of textual, acoustic and visual signals. While recent models have improved performance via advanced fusion strategies, they often lack psychologically meaningful priors to guide multimodal alignment. In this paper, we revisit the use of CLIP and propose a novel Visual Emotion Guided Anchoring (VEGA) mechanism that introduces class-level visual semantics into the fusion and classification process. Distinct from prior work that primarily utilizes CLIP's textual encoder, our approach leverages its image encoder to construct emotion-specific visual anchors based on facial exemplars. These anchors guide unimodal and multimodal features toward a perceptually grounded and psychologically aligned representation space, drawing inspiration from cognitive theories (prototypical emotion categories and multisensory integration). A stochastic anchor sampling strategy further enhances robustness by balancing semantic stability and intra-class diversity. Integrated into a dual-branch architecture with self-distillation, our VEGA-augmented model achieves sota performance on IEMOCAP and MELD. Code is available at: https://github.com/dkollias/VEGA. |
| title | Grounding Emotion Recognition with Visual Prototypes: VEGA -- Revisiting CLIP in MERC |
| topic | Computer Vision and Pattern Recognition |
| url | https://arxiv.org/abs/2508.06564 |