title: OpenCV structuring element ellipse and cross
body: <p>Can anyone tell me what does it mean that a kernel has an elliptic or cross shape?
  Can anyone give me an example how that kind of kernel should look?</p>
  
  <p>On the lines when you use MORPH_ELLIPSE and MORPH_CROSS in OpenCV.</p>
  
  <p>Thank you in advance. </p>