Enhancing Incomplete Multimodal Learning via Modal Complementary Recovering

Multimodal learning presents significant challenges arising from the unpredictable absence of modalities during both training and testing phases. Existing recovery methods struggle to leverage the available data, which can introduce additional noise during the recovery process and degrade performance. To mitigate these issues, we introduce a novel Modal Complementary Recovering (MCR) paradigm that strategically integrates both Complementary Graph-based Recovery (CGR) and Topological Low-Rank Adaptation (ToRA) mechanisms to enhance the effectiveness and reliability of incomplete multimodal learning. For effective exploitation of the complementarity among different modalities, the main objective of CGR is to employ bidirectional mapping flows trained on a small subset of complete data to learn complementary graphs across all modalities. By constructing entity-relationship diagram specific to dataset, ToRA is designed to enhance the fine-tuning process by incorporating topological prompt. Extensive experiments on multiple benchmark datasets consistently demonstrate the superiority of our MCR paradigm in comparison to state-of-the-art baselines.