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Apple Research unearthed forgotten AI technique and using it to generate images

(9to5mac.com)
129 points celias | 1 comments | 23 Jun 25 18:19 UTC | HN request time: 0.206s | source
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kelseyfrog ◴[27 Jun 25 03:35 UTC] No.44393483[source]▶
Forgotten from like 2021? NVAE[1] was a great paper but maybe four years is long enough to be forgotten in the AI space? shrug

1. NVAE: A Deep Hierarchical Variational Autoencoder https://arxiv.org/pdf/2007.03898

replies(2): >>44393507 #>>44393824 #
nabla9 ◴[27 Jun 25 05:01 UTC] No.44393824[source]▶
They are both variational inference, but Normalizing Flow (NF) is not VAE.
replies(1): >>44394090 #
1. kelseyfrog ◴[27 Jun 25 06:08 UTC] No.44394090[source]▶
If you read the paper, you'll find "More Expressive Approximate Posteriors with Normalizing Flows" is in the methods section. The authors are in fact using (inverse) normalizing flows within the context of VAEs.

The appendix goes on to explain, "We apply simple volume-preserving normalizing flows of the form z′ = z + b(z) to the samples generated by the encoder at each level".