Duplicate Multi-modal Entities Detection with Graph Contrastive Self-training Network

Duplicate multi-modal entities detection aims to find highly similar entities from massive entities with multi-modal information, which is a basic task in many applications and becoming more important and urgent with the development of Internet and e-commerce platforms. Traditional methods employ machine learning or deep learning on feature embedding extracted from multi-modal information, which ignores the correlation among entities and modals. Inspired by the popular Graph Neural Networks (GNNs), we can analyze the multi-relation graph of entities constructed from their multi-modal information with GNN. However, this solution still faces the extreme label sparsity challenge, particularly in industrial applications. In this work, we propose a novel graph contrastive self-training network model, named CT-GNN, for duplicate multi-modal entities detection with extreme label sparsity. With the multi-relation graph of entities constructed from multi-modal features of entities with KNN, we first learn the preliminary node embeddings with existing GNN, e.g., GCNs. To alleviate the problem of extremely sparse labels, we design a layer contrastive module to effectively exploit implicit label information, as well as a pseudo labels extension module to determine label boundary. In addition, graph structure learning is introduced to refine the structure of the multi-relation graph. A uniform optimization framework is designed to seamlessly integrate these three components. Sufficient experiments on real datasets, in comparison with SOTA baselines, well demonstrate the effectiveness of our proposed method.