OpenCV-Python 使用级联分类器进行物体检测

import cv2

img = cv2.imread("D:/tmp/andreea-pop-4_9_-K6cYYM-unsplash.jpg")
imgGray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

faceCascade = cv2.CascadeClassifier("D:/tmp/haarcascade_frontalface_default.xml")
faces = faceCascade.detectMultiScale(imgGray, 1.1, 4) 

for (x, y, w, h) in faces:
    cv2.rectangle(img, (x, y), (x + w, y + h), (255, 0, 0), 2)  # 框出人脸

cv2.imshow("Result", img)

cv2.waitKey(0)