Using Locality Preserving Projections to Improve the Performance of Kernel Clustering

摘要

Many clustering methods may have poor performance when the data structure is complex (i.e., the data has an aspheric shape or non-linear relationship). Inspired by this view, we proposed a clustering model which combines kernel function and Locality Preserving Projections (LPP) together. Specifically, we map original data into the high-dimensional feature space according to the idea of kernel function. Secondly, it is feasible to explore the local structure of data in clustering tasks. LPP is used to preserve the original local structure information of data to improve the validity of the clustering model. Finally, some outliers are often included in real data, so we embedded sparse regularization items in the model to adjust feature weights and remove outliers. In addition, we design a simple iterative optimization method to solve the final objective function and show the convergence of the optimization method in the experimental part. The experimental analysis of ten public data sets showed that our proposed method has better efficiency and performance in clustering tasks than existing clustering methods.