Gromov-Wasserstein Distance based Object Matching: Asymptotic Inference

Christoph Alexander Weitkamp, Katharina Proksch, Carla Tameling, Axel Munk

Research output: Working paper

Abstract

In this paper, we aim to provide a statistical theory for object matching based on the Gromov-Wasserstein distance. To this end, we model general objects as metric measure spaces. Based on this, we propose a simple and efficiently computable asymptotic statistical test for pose invariant object discrimination. This is based on an empirical version of a $\beta$-trimmed lower bound of the Gromov-Wasserstein distance. We derive for $\beta\in[0,1/2)$ distributional limits of this test statistic. To this end, we introduce a novel $U$-type process indexed in $\beta$ and show its weak convergence. Finally, the theory developed is investigated in Monte Carlo simulations and applied to structural protein comparisons.
Original language English arXiv.org Published - 22 Jun 2020

Keywords

• math.ST
• stat.TH
• 62E20, 62G20, 65C60 (Primary) 60E05 (Secondary)