title: ImportError: No module named cv2
body: <pre><code>import numpy as np
  
  import cv2
  from matplotlib import pyplot as plt
  
  img = cv2.imread('1.jpg',0)
  
  orb = cv2.ORB()
  
  kp = orb.detect(img,None)
  
  kp, des = orb.compute(img, kp)
  
  
  img2 = cv2.drawKeypoints(img,kp,color=(0,255,0), flags=0)
  plt.imshow(img2),plt.show()
  </code></pre>
  
  <p>In here, I have installed numpy and opencv in my windows operating system. But i can't find out the proper way to add cv2 module.</p>