image capture from camera python

1import cv2
2
3cam = cv2.VideoCapture(0)
4
5cv2.namedWindow("test")
6
7img_counter = 0
8
9while True:
10    ret, frame = cam.read()
11    if not ret:
12        print("failed to grab frame")
13        break
14    cv2.imshow("test", frame)
15
16    k = cv2.waitKey(1)
17    if k%256 == 27:
18        # ESC pressed
19        print("Escape hit, closing...")
20        break
21    elif k%256 == 32:
22        # SPACE pressed
23        img_name = "opencv_frame_{}.png".format(img_counter)
24        cv2.imwrite(img_name, frame)
25        print("{} written!".format(img_name))
26        img_counter += 1
27
28cam.release()
29
30cv2.destroyAllWindows()
31