title: filling contours with opencv python
body: <p>I have binary image with polylines created with:</p>
  
  <pre><code>cv2.polylines(binaryImage,contours,1, (255,255,255))
  </code></pre>
  
  <p>What I need now is effective method to fill all polylines. I haven't found such method in opencv, but maybe it exists. Alternatively, maybe I could implement algorithm to do the job (but fast one- I have HD ready pictures). Please share your thoughts..</p>