text: import cv2
  path = raw_input("Enter the path of image: ")
  img = cv2.imread(path,0)
  if img.shape != [28,28]:
      img2 = cv2.resize(img,(28,28))
      img = img2.reshape(28,28,-1);
  else:
      img = img.reshape(28,28,-1);
  #revert the image,and normalize it to 0-1 range
  img = 1.0 - img/255.0