title: mentioning interpolation method in cv2.warpaffine()
body: <p>How can I use the bicubic interpolation method in the <code>cv2.warpAffine()</code> method? I am trying to rotate an image through a non-center point. </p>
  
  <pre><code>import cv2
  import numpy as np
  import matplotlib.pyplot as plt
  
  img = cv2.imread('1.jpg',0)
  rows,cols = img.shape
  M = cv2.getRotationMatrix2D((cols/2,rows/2),-40,1) 
  dst = cv2.warpAffine(img,M,(cols,rows),flags=CV_INTER_CUBIC)
  #cv2.Resize(src, dst, interpolation=CV_INTER_CUBIC)
  plt.imshow(dst)
  </code></pre>
  
  <p>With this I get <code>NameError: name 'CV_INTER_CUBIC' is not defined</code></p>