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The 25th International Conference on Machine Learning (ICML 2008)

Topologically-Constrained Latent Variable Models

author: Raquel Urtasun, Computer Science and Artificial Intelligence Laboratory, MIT - Massachusetts Institute of Technology

Description

In dimensionality reduction approaches, the data are typically embedded in a Euclidean latent space. However for some data sets this is inappropriate. For example, in human motion data we expect latent spaces that are cylindrical or a toroidal, that are poorly captured with a Euclidean space. In this paper, we present a range of approaches for embedding data in a non-Euclidean latent space. Our focus is the Gaussian Process latent variable model. In the context of human motion modeling this allows us to (a) learn models with interpretable latent directions enabling, for example, style/content separation, and (b) generalize beyond the data set enabling us to learn transitions between motion styles even though such transitions are not present in the data

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