title: Adaptive Threshold parameters confusion
body: <p>Can anyone please tell me what are the parameters in these Adaptive Threshold functions and how are they controlling black and white pixels.</p>
  
  <pre><code>cv2.adaptiveThreshold(img,255,cv2.ADAPTIVE_THRESH_MEAN_C,\
              cv2.THRESH_BINARY,11,2)
  th3 = cv2.adaptiveThreshold(img,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C,\
              cv2.THRESH_BINARY,11,2)
  </code></pre>