title: Scale layer in Caffe
body: <p>I am looking through the <a href="https://github.com/KaimingHe/deep-residual-networks/blob/master/prototxt/ResNet-50-deploy.prototxt">Caffe prototxt for deep residual networks</a> and have noticed the appearance of a <code>"Scale"</code> layer.</p>
  
  <pre><code>layer {
      bottom: "res2b_branch2b"
      top: "res2b_branch2b"
      name: "scale2b_branch2b"
      type: "Scale"
      scale_param {
          bias_term: true
      }
  }
  </code></pre>
  
  <p>However, this layer is not available in the <a href="http://caffe.berkeleyvision.org/tutorial/layers.html">Caffe layer catalogue</a>. Can someone explain the functionality of this layer and the meaning of the parameters or point to a an up-to-date documentation for Caffe?</p>