Co-regularized PLSA for Multi-view Clustering

Multi-view data is common in a wide variety of application domains. Properly exploiting the relations among different views is helpful to alleviate the difficulty of a learning problem of interest. To this end, we propose an extended Probabilistic Latent Semantic Analysis (PLSA) model for multi-view clustering, named Co-regularized PLSA (CoPLSA). CoPLSA integrates individual PLSAs in different views by pairwise co-regularization. The central idea behind the co-regularization is that the sample similarities in the topic space from one view should agree with those from another view. An EM-based scheme is employed for parameter estimation, and a local optimal solution is obtained through an iterative process. Extensive experiments are conducted on three realworld datasets and the compared results demonstrate the superiority of our approach.