Group-invariant max filtering

• URL: http://arxiv.org/abs/2205.14039v1
• Date: Fri, 27 May 2022 15:18:08 GMT
• Title: Group-invariant max filtering
• Authors: Jameson Cahill, Joseph W. Iverson, Dustin G. Mixon, Daniel Packer
• Abstract summary: We construct a family of $G$-invariant real-valued functions on $V$ that we call max filters. In the case where $V=mathbbRd$ and $G$ is finite, a suitable max filter bank separates orbits, and is even bilipschitz in the quotient metric.
• Score: 4.396860522241306
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Given a real inner product space $V$ and a group $G$ of linear isometries, we construct a family of $G$-invariant real-valued functions on $V$ that we call max filters. In the case where $V=\mathbb{R}^d$ and $G$ is finite, a suitable max filter bank separates orbits, and is even bilipschitz in the quotient metric. In the case where $V=L^2(\mathbb{R}^d)$ and $G$ is the group of translation operators, a max filter exhibits stability to diffeomorphic distortion like that of the scattering transform introduced by Mallat. We establish that max filters are well suited for various classification tasks, both in theory and in practice.

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