import numpy as np
import cv2 as cv
cap = cv.VideoCapture(0)
if not cap.isOpened():
print("Cannot open camera")
exit()
while True:
# Capture frame-by-frame
ret, frame = cap.read()
# if frame is read correctly ret is True
if not ret:
print("Can't receive frame (stream end?). Exiting ...")
break
# Our operations on the frame come here
gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)
# Display the resulting frame
cv.imshow('frame', gray)
if cv.waitKey(1) == ord('q'):
break
# When everything done, release the capture
cap.release()
cv.destroyAllWindows()
import cv2
pic = cv2.VideoCapture(0) # video capture source camera (Here webcam of laptop)
ret,frame = pic.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
pic.release()
对于相机/视频,我可以推荐这个OpenCV
cv.VideoCapture(0)
捕获视频帧并ret, frame = cap.read()
读取每个帧您可以使用OpenCV的VideoCapture方法捕获单个帧
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