The Lecture Notes column of the September 2009 issue of the IEEE Signal Processing Magazine presents a framework called multiview point cloud regularization (MVPCR), which unifies and generalizes several semisupervised kernel methods that are based on data-dependent regularization in reproducing kernel Hilbert spaces. Special cases of MVPCR include coregularized least squares (CoRLS), manifold regularization (MR), and graph-based SSL. Read the full article by David S. Rosenberg, Vikas Sindhwani, Peter L. Bartlett, and Partha Niyogi.