1 import numpy as np
 2 import cv2
 3 
 4 cap = cv2.VideoCapture(0)
 5 
 6 while(True):
 7     # Capture frame-by-frame
 8     ret, frame = cap.read()
 9 
10     # Our operations on the frame come here
11     gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
12 
13     # Display the resulting frame
14     cv2.imshow(‘frame‘,gray)
15     if cv2.waitKey(1) & 0xFF == ord(‘q‘):
16         break
17 
18 # When everything done, release the capture
19 cap.release()
20 cv2.destroyAllWindows()