title: Compute mean of HDF5 dataset to use in caffe classification
body: <p>I use <code>classification.cpp</code> to classify my images based on a trained network in caffe neural network toolbox.
  This file has some arguments as follows:</p>
  
  <pre><code>1-model_file
  2-trained_file
  3-mean_file
  4-label_file
  5-test_file
  </code></pre>
  
  <p><code>mean_file</code> is computed by <code>caffe-master/build/tools/compute_image_mean</code>.</p>
  
  <p>Now I created a <code>HDF5</code> dataset and trained a net. So I have 1,2,4,5 arguments but I don't know how can I compute <code>mean_file</code>. What is the solution?</p>