openCV人脸识别1

1.示例代码

import cv2if __name__ == &＃39;__main__&＃39;:img = cv2.imread(r&＃39;..\img\burenshi.jpg&＃39;)#加载人脸检测模型face_detector = cv2.CascadeClassifier(r&＃39;c:\program files (x86)\microsoft visual studio\shared\python37_64\lib\site-packages\cv2\data\haarcascade_frontalface_alt2.xml&＃39;)#调参增加检测精度faces = face_detector.detectMultiScale(img,scaleFactor=1.1,  #缩放每次检测范围，默认1.1minNeighbors=3)#绘制人脸检测ROIfor x,y,w,h in faces: cv2.rectangle(img,pt1=(x,y),pt2=(x+w,y+h),color=[0,0,255],thickness=2)  cv2.imshow(&＃39;face&＃39;, img)cv2.waitKey(0)cv2.destroyAllWindows()


2.结果展示

总结

基于openCV的人脸检测，首先要引入人脸检测模型，然后在使用其绘图函数绘制脸部ROI区域。