[Python] 纯文本查看 复制代码import cv2

import time

import requests

capture = cv2.VideoCapture(0)#获取摄像头对象

casc_path = "haarcascade_frontalface_default.xml"

faceCascade = cv2.CascadeClassifier(casc_path)

color = (0, 255, 0)

font = cv2.FONT_HERSHEY_SIMPLEX

end_time=0

countdown=0

while(True):

#读取一帧图像

ret,frame=capture.read()#第一个返回值是bool值，判断是否有图像，第二个就是图像

if ret:

#转换为灰度图

grey = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

faceRects = faceCascade.detectMultiScale(grey, scaleFactor = 1.2, minNeighbors = 3, minSize = (32, 32))#这是一个数组，可以输出来看一下，有人脸的大小范围的参数

count = str(len(faceRects))

if int(count) > 0: #大于0则检测到人脸

start_time = time.time()#要判断发送请求的时间间隔，两次间隔不能少于30秒，不然体验很不好

if end_time<1:

requests.get("http://192.168.1.165:8080/")

end_time = time.time()

countdown= int(start_time-end_time)

if start_time-end_time>30:

requests.get("http://192.168.1.165:8080/") #每次重启电脑都要更换内网ip

end_time = time.time()

for faceRect in faceRects: #绘制框框，单独框出每一张人脸

x, y, w, h = faceRect

cv2.rectangle(frame, (x - 10, y - 10), (x + w + 10, y + h + 10), color, 2)

cv2.putText(frame, "count:"+count, (10, 40), font, 0.8, (0, 255, 255), 2)#添加一个人脸个数的文字显示

#显示图像

cv2.imshow("test", frame)

c = cv2.waitKey(10)#等待退出键

if c & 0xFF == ord('q'):

break