视频中的人脸识别

 1 import cv2 as cv
 2 def face_detect_demo(img):
 3     #将图片灰度
 4     gray=cv.cvtColor(img,cv.COLOR_BGR2GRAY)
 5     #加载特征数据
 6     face_detector = cv.CascadeClassifier(
 7         'D:/Opencv/opencv/sources/data/haarcascades/haarcascade_frontalface_default.xml')
 8     faces = face_detector.detectMultiScale(gray)
 9     for x,y,w,h in faces:
10         cv.rectangle(img,(x,y),(x+w,y+h),color=(0,0,255),thickness=2)
11         cv.circle(img,center=(x+w//2,y+h//2),radius=(w//2),color=(0,255,0),thickness=2)
12     cv.imshow('result',img)
13 #读取视频
14 cap = cv.VideoCapture('C:/Users/87823/Desktop/video.mp4')
15 while True:
16     flag,frame=cap.read()
17     print('flag:',flag,'frame.shape:',frame.shape)
18     if not flag:
19         break
20     face_detect_demo(frame)
21     if ord('q') == cv.waitKey(10):
22         break
23 cv.destroyAllWindows()
24 cap.release()