text: import cv2
  import numpy as np
  
  #img = cv2.imread('/home/mfallon/data/atlas/2014-04-21-dense-depth-drills/000000.ppm')
  #img = cv2.imread('building.jpg')
  
  img = cv2.imread('utah.jpg')
  
  
  gray= cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
  
  sift = cv2.SIFT()
  kp = sift.detect(gray,None) # (image, mask)
  
  img=cv2.drawKeypoints(gray,kp)
  
  cv2.imwrite('sift_keypoints.jpg',img)
  