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Tip:直接应用OpenCV自带训练好的配置文件.xml
# -*- coding: utf-8 -*-
"""
Created on Mon Aug 27 09:18:05 2018
@author: Miracle
"""
import cv2
def detectFace():
#加载人脸检测的配置文件
face_cascade = cv2.CascadeClassifier('../data/haarcascades/haarcascade_frontalface_alt.xml')
# face_cascade.load('../data/haarcascades/haarcascade_frontalface_alt.xml')
#打开摄像头
cap = cv2.VideoCapture(0)
scaling_factor = 1.25
if not cap.isOpened:
raise IOError('Cannot open webcam!')
while True:
ret,frame = cap.read()
if not ret:
break
frame = cv2.resize(frame,None,
fx = scaling_factor,
fy = scaling_factor,
interpolation = cv2.INTER_LINEAR)
gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
face_rects = face_cascade.detectMultiScale(gray)
for (x,y,w,h) in face_rects:
cv2.rectangle(frame,(x,y),(x+w,h+y),(0,255,0),3)
cv2.imshow('detecting face',frame)
if cv2.waitKey(1) == 27:
break
cap.release()
cv2.destroyAllWindows()
if __name__ == '__main__':
detectFace()