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Can you explain the logic of updated_ema_cluster_size in VectorQuantizerEMA? #248

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wztdream opened this issue Jul 21, 2022 · 0 comments
Open

Can you explain the logic of updated_ema_cluster_size in VectorQuantizerEMA? #248

wztdream opened this issue Jul 21, 2022 · 0 comments

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@wztdream
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Hi,
It seems updated_ema_cluster_size in VectorQuantizerEMA use small epsilon to avoid zero in denominator, but the formula is strange to me, so can you explain the logic here, and why not directly use something like x=x+epsilon?
https://github.com/deepmind/sonnet/blob/d1cd37117bcb98223b3e4b930717d418abb76484/sonnet/src/nets/vqvae.py#L270-L271
@wztdream wztdream changed the title Can you expain the logic of updated_ema_cluster_size in VectorQuantizerEMA? Can you explain the logic of updated_ema_cluster_size in VectorQuantizerEMA? Jul 21, 2022
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@wztdream