Graph Contrastive Learning for Fusion of Graph Structure and Attribute Information

Graph Contrastive Learning (GCL) plays a crucial role in multimedia applications due to its effectiveness in analyzing graph-structured data. Existing GCL methods focus on maximizing the agreement of node representations across different augmentations, which leads to the neglect of unique and complementary information in each augmentation. In this paper, we propose a fusion-based GCL model (FB-GCL) that learns fused representations to effectively capture complementary information from both the graph structure and node attributes. Our model consists of two modules: a graph fusion encoder and a graph contrastive module. The graph fusion encoder adaptively fuses the representations learned from the topology graph and the attribute graph. The graph contrastive module extracts supervision signals from the raw graph by leveraging both the pairwise relationships within the graph structure and the multi-label information from the attributes. Extensive experiments on seven benchmark datasets demonstrate that FB-GCL enhances performance in node classification and link prediction tasks. This improvement is especially valuable for multimedia data analysis, as integrating graph structure and attribute information is crucial for effectively understanding and processing complex datasets.