arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.16769cs.CV
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统一潜在表示与词典表示以实现有效的视频-文本检索

Unifying Latent and Lexicon Representations for Effective Video-Text Retrieval

MAIS, Institute of Automation, Chinese Academy of Sciences(中国科学院自动化研究所多模态人工智能系统实验室);School of Artificial Intelligence, University of Chinese Academy of Sciences(中国科学院大学人工智能学院);University of Science and Technology of China(中国科学技术大学);Alibaba Group(阿里巴巴集团);School of Information Science and Technology, ShanghaiTech University(上海科技大学信息科学与技术学院)

Haowei Liu, Yaya Shi, Haiyang Xu, Chunfeng Yuan, Qinghao Ye, Chenliang Li, Ming Yan, Ji Zhang, Fei Huang, Bing Li, Weiming Hu

AI总结:

本文提出UNIFY框架,通过学习词典表示捕捉细粒度语义,并结合潜在表示,通过结构共享与自蒸馏实现统一学习,显著提升视频-文本检索性能。

摘要:

在视频-文本检索中,大多数现有方法采用双编码器架构以实现快速检索,该架构使用两个独立的编码器分别提取视频和文本的全局潜在表示。然而,它们在捕捉细粒度语义概念方面面临挑战。在本工作中,我们提出了UNIFY框架,该框架学习词典表示以捕捉细粒度语义,并融合潜在表示与词典表示的优势用于视频-文本检索。具体来说,我们将视频和文本映射到一个预定义的词典空间中,其中每个维度对应一个语义概念。我们提出了一种两阶段语义锚定方法,用于激活语义相关的维度并抑制不相关的维度。因此,学习到的词典表示能够反映视频和文本的细粒度语义。此外,为了利用潜在表示与词典表示之间的互补性,我们提出了一种统一学习方案,通过结构共享和自蒸馏促进相互学习。实验结果表明,我们的UNIFY框架大幅优于以往的视频-文本检索方法,在MSR-VTT和DiDeMo上分别实现了4.8%和8.2%的Recall@1提升。

英文摘要:

In video-text retrieval, most existing methods adopt the dual-encoder architecture for fast retrieval, which employs two individual encoders to extract global latent representations for videos and texts. However, they face challenges in capturing fine-grained semantic concepts. In this work, we propose the UNIFY framework, which learns lexicon representations to capture fine-grained semantics and combines the strengths of latent and lexicon representations for video-text retrieval. Specifically, we map videos and texts into a pre-defined lexicon space, where each dimension corresponds to a semantic concept. A two-stage semantics grounding approach is proposed to activate semantically relevant dimensions and suppress irrelevant dimensions. The learned lexicon representations can thus reflect fine-grained semantics of videos and texts. Furthermore, to leverage the complementarity between latent and lexicon representations, we propose a unified learning scheme to facilitate mutual learning via structure sharing and self-distillation. Experimental results show our UNIFY framework largely outperforms previous video-text retrieval methods, with 4.8% and 8.2% Recall@1 improvement on MSR-VTT and DiDeMo respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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