- Abstract: We propose a novel approach for preserving topological structures of the input space in latent representations of autoencoders. Using persistent homology, a technique from topological data analysis, we calculate topological signatures of both the input and latent space to derive a topological loss term. Under weak theoretical assumptions, we can construct this loss in a differentiable manner, such that the encoding learns to retain multi-scale connectivity information. We show that our approach is theoretically well-founded and that it exhibits favourable latent representations on a synthetic manifold as well as on real-world image data sets, while preserving low reconstruction errors.
- Code: https://osf.io/abuce/?view_only=f16d65d3f73e4918ad07cdd08a1a0d4b
- Keywords: Topology, Deep Learning, Autoencoders, Persistent Homology, Representation Learning, Dimensionality Reduction, Topological Machine Learning, Topological Data Analysis