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Feedforward neural networks trained to reconstruct their own input. Usually one of the hidden layers is a "bottleneck", leading to encoder->decoder interpretation.

9 votes
2 answers
5k views

How does the bottleneck z dimension affect the reconstruction loss in VAEs

I have come across few VAE papers that all report a similar metric bits/dim Many (if not all) fail to mention the bottleneck size of the z space. I do know that this would directly affect the recons …
iordanis's user avatar
  • 505
2 votes

Autoencoder learning average of training Images

Good to see you figured out you initialized the weights to 0. But this shouldn't be a direct cause for the above effect by itself. The reason is that you have a posterior collapse, this means your dec …
iordanis's user avatar
  • 505