title: EmguCV Image size different from Image.Data size
body: <p>I copy a part of an image to a new one:</p>
  
  <pre><code>bigImage.ROI = SomeRectangle;
  Emgu.CV.Image&lt;Emgu.CV.Structure.Rgb, byte&gt; roiImage = bigImage.Copy();
  </code></pre>
  
  <p>Now <code>roiImage.Cols==roiImage.Width==1</code> and <code>roiImage.Rows==roiImage.Height==106</code>; however size of <code>roiImage.Data</code> is <code>[106,4,3]</code>. So Width of image is not equal to the second dimension of the data.</p>
  
  <p>Why does that occur?</p>