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Dueling Decoders: Regularizing Variational Autoencoder Latent Spaces
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Dueling Decoders: Regularizing Variational Autoencoder Latent Spaces
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Paper
Dueling Decoders: Regularizing Variational Autoencoder Latent Spaces
2019
Overview
Variational autoencoders learn unsupervised data representations, but these models frequently converge to minima that fail to preserve meaningful semantic information. For example, variational autoencoders with autoregressive decoders often collapse into autodecoders, where they learn to ignore the encoder input. In this work, we demonstrate that adding an auxiliary decoder to regularize the latent space can prevent this collapse, but successful auxiliary decoding tasks are domain dependent. Auxiliary decoders can increase the amount of semantic information encoded in the latent space and visible in the reconstructions. The semantic information in the variational autoencoder's representation is only weakly correlated with its rate, distortion, or evidence lower bound. Compared to other popular strategies that modify the training objective, our regularization of the latent space generally increased the semantic information content.
Publisher
Cornell University Library, arXiv.org
Subject
