import cv2
cam = cv2.VideoCapture(0)
cascade = cv2.CascadeClassifier('./haarcascade_files/haarcascade_frontalface_default.xml')
while cam.isOpened():
	_,frame = cam.read()
	gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
	faces =  cascade.detectMultiScale(gray,1.3,5)
	for x,y,w,h in faces:
		cv2.rectangle(frame,(x,y),(x+w,y+h),(0,255,0),2)
		cv2.imshow("video",frame)
	if cv2.waitKey(1) & 0xFF == ord('q'):
		break
cam.release()
cv2.destroyAllWindows()