基於Python使用Opencv實現攝像頭數據採集

1、調用攝像頭並錄製視頻

from cv2 import cv2
#捕獲攝像頭幀
cameraCapture = cv2.VideoCapture(0)
fps = 30
size=(int(cameraCapture.get(cv2.CAP_PROP_FRAME_WIDTH)),int(cameraCapture.get(cv2.CAP_PROP_FRAME_HEIGHT)))
videoWriter=cv2.VideoWriter('E:\\2.avi',cv2.VideoWriter_fourcc('X','V','I','D'),fps,size)
success,frame = cameraCapture.read()
numFrameRemaining = 10 * fps    #攝像頭捕獲持續時間
while success and numFrameRemaining > 0:
    videoWriter.write(frame)
    success,frame = cameraCapture.read()
    numFrameRemaining -= 1
cameraCapture.release()

2、調用攝像頭，通過OpenCV窗口顯示畫面

from cv2 import cv2
#判斷窗口點擊事件
clicked = False
def onMouse(event,x,y,flags,param):
    global clicked
    if event == cv2.EVENT_LBUTTONUP:
        clicked = True
#捕獲序號爲0的攝像頭
cameroCapture = cv2.VideoCapture(0)
#創建窗口
cv2.namedWindow('window')
#cv2.setMouseCallback('window',onMouse)
#讀取幀
success,frame = cameroCapture.read()
while success and cv2.waitKey(1) == -1:
    cv2.imshow('window',frame)
    success,frame = cameroCapture.read()
cv2.destroyWindow('window')
cameroCapture.release()

 由於OpenCV並沒有真正提供窗體事件監聽，在程序運行時無法通過點擊關閉窗口，可以通過鍵盤監聽cv2.waitKey(1)來判斷，cv2.waitKey(1)=-1時爲沒有輸入，即程序運行時可以通過按下ESC鍵結束運行或終止調試。