Incomplete Multi-view Learning Via Consensus Graph Completion

Traditional graph-based multi-view learning methods usually assume that data are complete. Whereas several instances of some views may be missing, making the corresponding graphs incomplete and reducing the virtue of graph regularization. To mitigate the negative effect, a novel method, called incomplete multi-view learning via consensus graph completion (IMLCGC), is proposed in this paper, which completes the incomplete graphs based on the consensus among different views and then fuses the completed graphs into a common graph. Specifically, IMLCGC develops a learning framework for incomplete multi-view data, which contains three components, i.e., consensus low-dimensional representation, graph regularization, and consensus graph completion. Furthermore, a generalization error bound of the model is established based on Rademacher's complexity. It shows the theory that learning with incomplete multi-view data is difficult. Experimental results on six well-known datasets indicate that IMLCGC significantly outperforms the state-of-the-art methods.