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Enhancing Multimodal Alignment with Momentum Augmentation for Dense Video Captioning

yiwei wei (Tianjin university); Shaozu Yuan (JD AI ); Meng Chen (JD AI); Longbiao Wang (Tianjin University)

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06 Jun 2023

Dense video captioning aims to localize multiple events from an untrimmed video and generate corresponding captions for each event. Fusing different modalities(e.g. rgb, flow, audio) via transformer structure is a promising way to improve the caption performance. However, it is challenging for the cross-modal encoder to learn multimodal interactions due to their inherent disparities of distribution. In this paper, we propose a novel transformer structure with contrastive learning to align different modalities. Specifically, to avoid the limitation of small batch size and false contrastive targets, we design an event-aligned momentum augmentation strategy to apply contrast learning for dense video captioning. The experimental result shows that our proposals outperform all existing multimodal fusion methods for dense video captioning.

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