Asymptotically Valid Laplace Variational Inference for Bayesian Nonparametric Clustering of Marked Point Patterns
Year: 2026
Type: preprint
Abstract: We introduce Dirichlet process mixtures of marked Poisson point processes, a Bayesian nonparametric model for clustering replicated marked point patterns. The model jointly infers latent cluster structure, the number of clusters, and continuous mark-specific intensity surfaces with uncertainty quantification, a combination existing methods provide only in part. Using a squared-link intensity whose likelihood is tractable without gridding or thinning, we develop, to our knowledge, the first variational Bayes method for clustering marked Poisson point processes. Its constrained Laplace approximation eliminates sign ambiguity and nodal lines by turning each coefficient update into a well-posed convex problem, attaining computational efficiency and inferential fidelity with theoretical guarantees of mode consistency, exponential-weight concentration, and uniform total-variation accuracy. Our method outperforms competitors in accuracy and speed on synthetic data, and an NBA shot-chart analysis uncovers offensive archetypes.
Source: arXiv (Cornell University)
Authors: Choi, Minsung, Jeong, Seonghyun
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7160901851