Refining Contrastive Learning and Homography Relations for Multi-Modal Recommendation

• URL: http://arxiv.org/abs/2508.13745v1
• Date: Tue, 19 Aug 2025 11:35:48 GMT
• Title: Refining Contrastive Learning and Homography Relations for Multi-Modal Recommendation
• Authors: Shouxing Ma, Yawen Zeng, Shiqing Wu, Guandong Xu,
• Abstract summary: We propose a novel framework for textbfRtextbfEfining multi-modtextbfAl conttextbfRastive learning and hotextbfMography relations.<n>Our experiments on three real-world datasets demonstrate the superiority of REARM to various state-of-the-art baselines.
• Score: 19.01114538768217
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Multi-modal recommender system focuses on utilizing rich modal information ( i.e., images and textual descriptions) of items to improve recommendation performance. The current methods have achieved remarkable success with the powerful structure modeling capability of graph neural networks. However, these methods are often hindered by sparse data in real-world scenarios. Although contrastive learning and homography ( i.e., homogeneous graphs) are employed to address the data sparsity challenge, existing methods still suffer two main limitations: 1) Simple multi-modal feature contrasts fail to produce effective representations, causing noisy modal-shared features and loss of valuable information in modal-unique features; 2) The lack of exploration of the homograph relations between user interests and item co-occurrence results in incomplete mining of user-item interplay. To address the above limitations, we propose a novel framework for \textbf{R}\textbf{E}fining multi-mod\textbf{A}l cont\textbf{R}astive learning and ho\textbf{M}ography relations (\textbf{REARM}). Specifically, we complement multi-modal contrastive learning by employing meta-network and orthogonal constraint strategies, which filter out noise in modal-shared features and retain recommendation-relevant information in modal-unique features. To mine homogeneous relationships effectively, we integrate a newly constructed user interest graph and an item co-occurrence graph with the existing user co-occurrence and item semantic graphs for graph learning. The extensive experiments on three real-world datasets demonstrate the superiority of REARM to various state-of-the-art baselines. Our visualization further shows an improvement made by REARM in distinguishing between modal-shared and modal-unique features. Code is available \href{https://github.com/MrShouxingMa/REARM}{here}.

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