In plain words: It rewrites signals so nonlinear changes become simple straight-line moves in a new space, while the original stays recoverable. On synthetic data and natural videos it captured scattered discrete parts and the smooth shape of scenes, unlike methods that catch only one of the two.
Abstract · The Sparse Manifold Transform
We present a signal representation framework called the sparse manifold transform that combines key ideas from sparse coding, manifold learning, and slow feature analysis. It turns non-linear transformations in the primary sensory signal space into linear interpolations in a representational embedding space while maintaining approximate invertibility. The sparse manifold transform is an unsupervised and generative framework that explicitly and simultaneously models the sparse discreteness and low-dimensional manifold structure found in natural scenes. When stacked, it also models hierarchical composition. We provide a theoretical description of the transform and demonstrate properties of the learned representation on both synthetic data and natural videos.
Yubei Chen, Dylan M. Paiton, Bruno A. Olshausen
arXiv:1806.08887 · stat.ML, cs.LG, eess.IV · submitted Jun 23, 2018 · updated Dec 2, 2018
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