```python
import numpy as np
import cv2
cap=cv2.VideoCapture(0)
while(True):
ret,frame=cap.read()
frame=cv2.flip(frame,1)
gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
cv2.imshow('frame',frame)
cv2.imshow('gray',gray)
if cv2.waitKey(1)&0xFF==ord('q'):
break
cap.release()
cv2.destroyAllWindows()
```到的结果
可以看一下我的博客
http://t.csdn.cn/2TE4K