Jong-Shi Pang

Clustering by Orthogonal Non-negative Matrix Factorization: A Sequential Non-convex Penalty Approach

The non-negative matrix factorization (NMF) model with an additional orthogonality constraint on one of the factor matrices, called the orthogonal NMF (ONMF), has been found to provide improved clustering performance over the K-means. The ONMF model is a challenging optimization problem due to the o…