#!C:\Python27\python.exe
# -*- coding:utf-8 -*-
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
while True:
    ret, frame = cap.read()

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    cv2.imshow('frame', gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destoryAllWindows()