arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.04917cs.LGcs.AIcs.CLcs.CV
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社会化媒体中危机事件的多模态分类

Multimodal Categorization of Crisis Events in Social Media

Dataminr Inc.(Dataminr公司);Rutgers University(罗格斯大学);University of California, Davis(加州大学戴维斯分校)

Mahdi Abavisani, Liwei Wu, Shengli Hu, Joel Tetreault, Alejandro Jaimes

摘要:

图像分类和自然语言处理的最新发展,加上社交媒体使用的快速增长,使实时检测世界各地突发事件的工作取得了根本性的进展。应急反应就是这样一个领域,它将从这些进展中获益。通过每分钟处理数十亿条文本和图像,可以自动检测事件,使应急响应工作人员能够更好地评估快速变化的情况,并相应地部署资源。迄今为止,该领域的大多数事件检测技术都集中在仅图像或仅文本的方法上,这限制了检测性能并影响了向危机响应团队提供的信息的质量。在本文中,我们提出了一种新的多模态融合方法,利用图像和文本作为输入。特别是,我们引入了一个交叉注意模块,可以过滤无信息和误导性的组件,从弱模态的样本样本的基础上。此外,我们采用了一种基于多模态图的方法,在训练过程中随机转换不同的多模态对的嵌入,以更好地规范学习过程,以及处理有限的训练数据,通过构建新的匹配对从不同的样本。我们表明,我们的方法优于单峰的方法和强大的多峰基线上的三个危机相关的任务的大幅度。

英文摘要:

Recent developments in image classification and natural language processing, coupled with the rapid growth in social media usage, have enabled fundamental advances in detecting breaking events around the world in real-time. Emergency response is one such area that stands to gain from these advances. By processing billions of texts and images a minute, events can be automatically detected to enable emergency response workers to better assess rapidly evolving situations and deploy resources accordingly. To date, most event detection techniques in this area have focused on image-only or text-only approaches, limiting detection performance and impacting the quality of information delivered to crisis response teams. In this paper, we present a new multimodal fusion method that leverages both images and texts as input. In particular, we introduce a cross-attention module that can filter uninformative and misleading components from weak modalities on a sample by sample basis. In addition, we employ a multimodal graph-based approach to stochastically transition between embeddings of different multimodal pairs during training to better regularize the learning process as well as dealing with limited training data by constructing new matched pairs from different samples. We show that our method outperforms the unimodal approaches and strong multimodal baselines by a large margin on three crisis-related tasks.

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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