Partially latent factors based multi‐view subspace learning

Abstract

Multi-view subspace clustering always performs well in high-dimensional data analysis, but is sensitive to the quality of data representation. To this end, a two-stage fusion strategy is proposed to embed representation learning into the process of multi-view subspace clustering. This article first proposes a novel matrix factorization method that can separate the coupling consistent and complementary information from observations of multiple views. Based on the obtained latent representations, we further propose two subspace clustering strategies: feature-level fusion and subspace-level hierarchical strategy. The feature-level method concatenates all kinds of latent representations from multiple views, and the original problem therefore degenerates to a single-view subspace clustering process. The subspace-level hierarchical method performs different self-expressive reconstruction processes on the corresponding complementary and consistent latent representations coming from each view, that is, the prior constraints imposed on different types of subspace representations are related to the relevant input factors. Finally, extensive experimental results on real-world datasets demonstrate the superiority of our proposed methods by Note that the shorter conference version of this article was published in the International Joint Conference on Neural Networks (2021). In the conference version, we only proposed the subspace-level hierarchical method MVSC-CSLFS, and another feature-level fusion algorithm MVSC-CSLF is proposed in this manuscript. Besides, we analyze and describe the proposed algorithms and validate the performances on multiple datasets.