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arXiv · 2510.00652

OTTER: Open-Tagging via Text-Image Representation for Multi-modal Understanding

Jieer Ouyang·Xiaoneng Xiang·Zheng Wang·Yangkai Ding
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Abstract

We introduce OTTER, a unified open-set multi-label tagging framework that harmonizes the stability of a curated, predefined category set with the adaptability of user-driven open tags. OTTER is built upon a large-scale, hierarchically organized multi-modal dataset, collected from diverse online repositories and annotated through a hybrid pipeline combining automated vision-language labeling with human refinement. By leveraging a multi-head attention architecture, OTTER jointly aligns visual and textual representations with both fixed and open-set label embeddings, enabling dynamic and semantically consistent tagging. OTTER consistently outperforms competitive baselines on two benchmark datasets: it achieves an overall F1 score of 0.81 on Otter and 0.75 on Favorite, surpassing the next-best results by margins of 0.10 and 0.02, respectively. OTTER attains near-perfect performance on open-set labels, with F1 of 0.99 on Otter and 0.97 on Favorite, while maintaining competitive accuracy on predefined labels. These results demonstrate OTTER's effectiveness in bridging closed-set consistency with open-vocabulary flexibility for multi-modal tagging applications.

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Jieer Ouyang, Xiaoneng Xiang, Zheng Wang, Yangkai Ding. 2025-10-01. OTTER: Open-Tagging via Text-Image Representation for Multi-modal Understanding. https://arxiv.org/abs/2510.00652

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