title: cv::Mat.release()
body: <p>I am start using OpenCV in my image processing program.
  When I use <code>cv::Mat</code> and allocate in a method on the memory as:</p>
  
  <pre><code>cv::Mat coords(100, 5, CV_32FC1);
  </code></pre>
  
  <p>Do I need to do <code>coords.release()</code> to clear from the memory at the end of the method if I don't need anymore?</p>
  
  <p>Is that have to do?
  Thanks</p>