title: How to write comments in the YAML programmatically in OpenCV?
body: <p>I usually put comments in the YAML so that the reader could understand YAML parameters quickly.</p>
  
  <pre><code>%CommentC: "~~~~~~~~~~~~~~~~~~~Filtering Setting~~~~~~~~~~~~~~~~~~~"
  WindowSize: 3
  Sigma: 3
  LowerThreshold: 25
  HigherThreshold: 35 
  </code></pre>
  
  <p>But how can I write the comment programmatically in OpenCV using <code>FileStorage</code>?</p>