title: How to call up Open CV Durand Tonemap function?
body: <p>I'm trying to examine multiple tone-mapping operators in Open CV, using Python.</p>
  <p>Various sources use four operators (Drago, Durand, Reinhard, Mantiuk). Three of them work. However, when I call up <code>cv2.createTonemapDurand()</code>, I get this error:</p>
  <pre><code>AttributeError: module 'cv2.cv2' has no attribute 'createTonemapDurand'
  </code></pre>
  <p>Is it possible to call the Durand operator somehow, or did Open CV drop that one recently?</p>
  <p>Thanks!</p>