python opencv人脸检测提取及保存方法


            注意这里提取到的人脸图片的保存地址要改成自己要保存的地址

opencv人脸的检测模型的路径也要更改为自己安装的opencv的人脸检测模型的路径





import cv2

save_path = 'F:\\face_photo_save\\chenym\\'

cascade = cv2.CascadeClassifier("D:\\opencv249\\opencv\\sources\\data\\haarcascades\\haarcascade_frontalface_alt_tree.xml")

cap = cv2.VideoCapture(0)

i = 0

while True:

 ret,frame = cap.read()

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

 rect = cascade.detectMultiScale(gray,scaleFactor=1.3,minNeighbors=9,minSize=(50,50),flags = cv2.cv.CV_HAAR_SCALE_IMAGE)

 print "rect",rect

 if not rect is (): 

  for x,y,z,w in rect:

   roiImg = frame[y:y+w,x:x+z]

   cv2.imwrite(save_path+str(i)+'.jpg',roiImg)

   cv2.rectangle(frame,(x,y),(x+z,y+w),(0,0,255),2)

   i +=1

 cv2.imshow('frame',frame)  

 if cv2.waitKey(1) &0xFF == ord('q'):

  break

cap.release()

cv2.destroyAllWindows()



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