视频检测.py

import cv2 as cv

def face_detect_demo(img):
    gary = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
    face_detect = cv.CascadeClassifier('D:/opencv/sources/data/haarcascades/haarcascade_frontalface_alt2.xml')
    face = face_detect.detectMultiScale(gary)
    for x,y,w,h in face:
        cv.rectangle(img,(x,y),(x+w, y+h), color=(0,0,255), thickness = 2)
    cv.imshow('result', img)

#读取摄像头
cap = cv.VideoCapture(0)

cap.read()


while True:
    flag,frame = cap.read()
    if not flag:
        break
    face_detect_demo(frame)
    if ord('q')==cv.waitKey(2):
        break
#释放内存
cv.destroyAllWindows()