python opencv捕获摄像头并显示内容
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1、捕获摄像头和实时显示
import cv2
import numpy as np
import pickle
import matplotlib.pyplot as plt
cap = cv2.VideoCapture(0)
while True:
ret,frame = cap.read()
# Our operations on the frame come here
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# Display the resulting frame
cv2.imshow(‘frame‘,gray)
if cv2.waitKey(1) & 0xFF == ord(‘q‘):
break
# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()
2、从摄像头内抓拍图片
import cv2
import numpy as np
import pickle
import matplotlib.pyplot as plt
cap = cv2.VideoCapture(0)
index = 0
while True:
ret,frame = cap.read()
# Our operations on the frame come here
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# Display the resulting frame
cv2.imshow(‘frame‘,gray)
if cv2.waitKey(1) & 0xFF == ord(‘p‘):
cv2.imwrite("kk.jpg",frame)
index = index + 1
if cv2.waitKey(1) & 0xFF == ord(‘q‘):
break
# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()
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