基于细粒度语义引导的多模态检索方法
(济南市口腔医院,山东 济南 250001)
摘要
现有基于类别标签的监督方法因监督信号粒度较粗,难以刻画同一类别下样本间的细微差异,限制了其在精细化检索任务中的应用效果。为此,文章提出一种细粒度语义引导的多模态哈希方法(Fine-grained Semantic-guided Multi-modal Hashing, FSMH)。该方法通过自动挖掘多模态数据的内容语义结构,构建细粒度的语义监督信号,从而引导哈希码的学习过程,使生成的哈希码既能保留模态间的细微语义差异,又能刻画其深层关联关系,实现语义层面的深度跨模态融合与精准检索。在两个常用多模态数据集上的实验表明,FSMH在不同哈希码长度下均显著优于当前先进的无监督及有监督哈希方法,验证了其有效性。
关键词
细粒度语义;多模态哈希;语义监督;跨模态检索
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作者简介
郑筱智(1989—),男,汉族,山东威海人,工程师,硕士研究生,研究方向:医学信息检索、大语言模型;通信作者:孙卓(1981—),男,汉族,山东济南人,助理工程师,研究方向:医学信息检索、大语言模型。