Group-invariant max filtering

05/27/2022
by   Jameson Cahill, et al.
0

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=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(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.

READ FULL TEXT

Please sign up or login with your details

Forgot password? Click here to reset