Why is the number of features in the 1st layer of CNN for MNIST 32?
<p>Based on the following tutorial:</p>

<p><a href="https://www.tensorflow.org/versions/v0.6.0/tutorials/mnist/pros/index.html#deep-mnist-for-experts" rel="nofollow">https://www.tensorflow.org/versions/v0.6.0/tutorials/mnist/pros/index.html#deep-mnist-for-experts</a></p>

<p>Where is the <code>32</code> as the number of features in 1st layer of CNN for MNIST coming from?</p>

<p>And where is the <code>64</code> as the number of features in 2nd layer coming from?</p>