title: Values of weights and outputs in Convolutional Neural Networks
body: <p>I'm wondering what the range of values are for the weights and inputs are in a convolutional neural networks. My understanding is as follows:</p>
  
  <p>If the input is a grayscale image, the input value of the first layer would be 0-255. But in the subsequent layers the input values would range from 0-1, due to the sigmoid function.</p>
  
  <p>But what are the range for the weights? Is it 0-1, or can it be higher? Does this vary a lot?</p>