git:https://github.com/linyi0604/Computer-Vision
1 # coding:utf8
2
3 import cv2
4
5
6 def detect():
7 # 建立人臉檢測的對象
8 face_cascade = cv2.CascadeClassifier("../data/haarcascade_frontalface_default.xml")
9 # 建立眼睛檢測的對象
10 eye_cascade = cv2.CascadeClassifier("../data/haarcascade_eye.xml")
11 # 連接配接攝像頭的對象 0表示攝像頭的編号
12 camera = cv2.VideoCapture(0)
13
14 while True:
15 # 讀取目前幀
16 ret, frame = camera.read()
17 # 轉為灰階圖像
18 gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
19 # 檢測人臉 傳回清單 每個元素都是(x, y, w, h)表示矩形的左上角和寬高
20 faces = face_cascade.detectMultiScale(gray, 1.3, 5)
21 # 畫出人臉的矩形
22 for (x, y, w, h) in faces:
23 # 畫矩形 在frame圖檔上畫, 傳入左上角和右下角坐标 矩形顔色 和線條寬度
24 img = cv2.rectangle(frame, (x, y), (x+w, y+h), (255, 0, 0), 2)
25 # 把臉單獨拿出來
26 roi_gray = gray[y: y+h, x: x+w]
27 # 在臉上檢測眼睛 (40, 40)是設定最小尺寸,再小的部分會不檢測
28 eyes = eye_cascade.detectMultiScale(roi_gray, 1.03, 5, 0, (40, 40))
29 # 把眼睛畫出來
30 for(ex, ey, ew, eh) in eyes:
31 cv2.rectangle(img, (x+ex, y+ey), (x+ex+ew, y+ey+eh), (0, 255, 0), 2)
32
33 cv2.imshow("camera", frame)
34 if cv2.waitKey(5) & 0xff == ord("q"):
35 break
36
37 camera.release()
38 cv2.destroyAllWindows()
39
40
41 if __name__ == '__main__':
42 detect()
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsIyZuBnL1UTN4ETO2QTNx0CMzkTOzEDNyIjNwgDM4EDMy0SMwIzN1ETMvwFOwgTMwIzLcFDMycTNxEzLcd2bsJ2Lc12bj5ycn9Gbi52YugTMwIzcldWYtl2Lc9CX6MHc0RHaiojIsJye.png)
我很醜哦 不要笑啊
轉載于:https://www.cnblogs.com/Lin-Yi/p/9417748.html