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What is the best optimizer for Convolutional neural network (CNN)?

Can I use RMSProp for CNN or only for RNN?

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Yes, you can use the same optimizers you are familiar with for CNNs.

I don't think that there is a best optimizer for CNNs. The most popular in my opinion is Adam. However some people like to use a plain SGD optimizer with custom parameters.

An excellent article explaining the differences between most popular gradient descent based optimizers can be found here.

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  • $\begingroup$ I get better accuracy with default valued SGD than ADAM. I read somewhere that that tends to be the case with CNN's. I'm actually looking for a more definitive answer that does recommend and explain why one is better than the other, as I don't seem to be the only one noticing this when optimizing a CNN. towardsdatascience.com/… $\endgroup$ Feb 28, 2020 at 1:18
  • $\begingroup$ Here is a link to a white paper on why SGD tends to generalize better than ADAM even though the latter tends to converge faster: proceedings.neurips.cc/paper/2020/file/… $\endgroup$
    – Zexelon
    Dec 18, 2022 at 3:57

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