Take photo using OpenCV

takephoto.py

import cv2
import sys

path = sys.argv[1]

if len(sys.argv) != 2:
    print "Usage: %s <image_save_path>" % sys.argv[0]

cap = cv2.VideoCapture(0)
count = 0
while True:
    # Capture frame-by-frame
    ret, frame = cap.read()
    display = cv2.resize(frame, (frame.shape[1] // 2, frame.shape[0] // 2))
    # Display the resulting frame
    cv2.imshow('frame', display)
    key = cv2.waitKey(30)
    if key & 0xFF == ord('q'):
        break
    elif key & 0xFF == ord('s'):
        cv2.imwrite('%s/%04d.png' % (path, count), frame)
        print("save image: %04d" % count)
        count += 1

# When everything done, release the capture
cv2.destroyAllWindows()