import numpy as np
import cv2
cap = cv2.VideoCapture(0) # video capture source camera (Here webcam of laptop)
ret,frame = cap.read() # return a single frame in variable `frame`
while(True):
cv2.imshow('img1',frame) #display the captured image
if cv2.waitKey(1) & 0xFF == ord('y'): #save on pressing 'y'
cv2.imwrite('images/c1.png',frame)
cv2.destroyAllWindows()
break
cap.release()
import cv2
cap = cv2.VideoCapture(0)
cap.set(3,640) #width=640
cap.set(4,480) #height=480
if cap.isOpened():
_,frame = cap.read()
cap.release() #releasing camera immediately after capturing picture
if _ and frame is not None:
cv2.imwrite('img.jpg', frame)
cv2.imwrite(name, frame)
使用SetCaptureProperty:
不过,我不知道怎么关上相机。
具有上述代码的ipython会话示例:
您可以使用OpenCV的
VideoCapture
方法捕获单个帧。稍后,您可以使用PIL轻松修改分辨率。
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