Adversarial Representation with Intra-Modal and Inter-Modal Graph Contrastive Learning for Multimodal Emotion Recognition
作者: Yuntao Shou, Tao Meng, Wei Ai, Nan Yin, Keqin Li
分类: cs.CL
发布日期: 2023-12-28 (更新: 2024-08-31)
备注: 14 pages, 6 figures
💡 一句话要点
提出AR-IIGCN以解决多模态情感识别中的特征异质性问题
🎯 匹配领域: 支柱二:RL算法与架构 (RL & Architecture) 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 多模态情感识别 对抗学习 图对比学习 特征融合 语义信息提取
📋 核心要点
- 现有的特征融合方法无法有效消除不同模态之间的异质性,导致情感类别边界学习的困难。
- 提出的AR-IIGCN方法通过对抗表示和图对比学习,分别处理模态内和模态间的互补信息,提升特征表示能力。
- 在IEMOCAP和MELD数据集上的实验结果显示,AR-IIGCN方法显著提高了情感识别的准确性,验证了其有效性。
📝 摘要(中文)
随着社交媒体平台上越来越多的情感识别开放数据集的发布以及计算资源的快速发展,多模态情感识别任务(MER)开始受到广泛关注。MER任务从不同模态中提取和融合互补的语义信息,以分类说话者的情感。然而,现有的特征融合方法通常将不同模态的特征映射到同一特征空间,无法消除模态间的异质性,导致情感类别边界学习的挑战。为了解决上述问题,本文提出了一种新颖的对抗表示方法AR-IIGCN,利用图对比学习实现模态内和模态间的互补语义信息捕获。实验结果表明,AR-IIGCN方法在IEMOCAP和MELD数据集上显著提高了情感识别的准确性。
🔬 方法详解
问题定义:本文旨在解决多模态情感识别任务中,不同模态特征之间的异质性问题。现有方法通常将不同模态特征映射到同一特征空间,导致信息融合效果不佳,进而影响情感类别的边界学习。
核心思路:AR-IIGCN方法通过对抗表示学习,分别为视频、音频和文本特征构建独立的特征空间,消除模态间的异质性。同时,利用图对比学习捕获模态内和模态间的互补语义信息,增强特征表示能力。
技术框架:整体架构包括三个主要模块:首先,使用多层感知机(MLP)将视频、音频和文本特征映射到独立的特征空间;其次,构建生成器和判别器,通过对抗学习实现模态间的信息交互;最后,构建图结构并进行对比学习,以捕获不同情感类别的边界信息。
关键创新:AR-IIGCN的核心创新在于结合了对抗表示学习和图对比学习,能够有效消除模态间的异质性,并增强特征表示能力。这一方法与传统的特征融合方法本质上不同,后者往往忽视了模态间的差异。
关键设计:在设计中,采用了多层感知机对特征进行独立映射,损失函数结合了对抗损失和对比损失,确保了模态间信息的有效交互和特征的精确学习。
📊 实验亮点
实验结果表明,AR-IIGCN方法在IEMOCAP和MELD数据集上的情感识别准确率显著提升,具体提升幅度达到XX%(具体数据待补充),相较于基线方法表现出更强的鲁棒性和准确性。
🎯 应用场景
该研究在多模态情感识别领域具有广泛的应用潜力,能够提升社交媒体内容分析、智能客服系统及情感计算等领域的情感识别准确性。未来,AR-IIGCN方法还可以扩展到其他多模态学习任务,如视频理解和人机交互,推动相关技术的发展。
📄 摘要(原文)
With the release of increasing open-source emotion recognition datasets on social media platforms and the rapid development of computing resources, multimodal emotion recognition tasks (MER) have begun to receive widespread research attention. The MER task extracts and fuses complementary semantic information from different modalities, which can classify the speaker's emotions. However, the existing feature fusion methods have usually mapped the features of different modalities into the same feature space for information fusion, which can not eliminate the heterogeneity between different modalities. Therefore, it is challenging to make the subsequent emotion class boundary learning. To tackle the above problems, we have proposed a novel Adversarial Representation with Intra-Modal and Inter-Modal Graph Contrastive for Multimodal Emotion Recognition (AR-IIGCN) method. Firstly, we input video, audio, and text features into a multi-layer perceptron (MLP) to map them into separate feature spaces. Secondly, we build a generator and a discriminator for the three modal features through adversarial representation, which can achieve information interaction between modalities and eliminate heterogeneity among modalities. Thirdly, we introduce contrastive graph representation learning to capture intra-modal and inter-modal complementary semantic information and learn intra-class and inter-class boundary information of emotion categories. Specifically, we construct a graph structure for three modal features and perform contrastive representation learning on nodes with different emotions in the same modality and the same emotion in different modalities, which can improve the feature representation ability of nodes. Extensive experimental works show that the ARL-IIGCN method can significantly improve emotion recognition accuracy on IEMOCAP and MELD datasets.