396：错误：（-5）此LBPH模型尚未计算。你打电话给火车的方法吗？在函数cv :: face :: LBPH :: predict

Question

我想用Python 2.7.13和OpenCV 3.3.0构建一个人脸识别程序。

然而，我当它试图发现我的脸收到此错误：

File "C:\GitProject\face_recognition\detector.py", line 20, in 
<module> Id = recognizer.predict(gray[y:y+h,x:x+w]) 
error: C:\projects\opencv-python\opencv_contrib\modules\face\src\lbph_faces.cpp:396: 
error: (-5) This LBPH model is not computed yet. Did you call the train method? in function cv::face::LBPH::predict 

这里是我的代码：

import cv2 ,os 
import numpy as np 
from PIL import Image 
import pickle 

recognizer = cv2.face.LBPHFaceRecognizer_create() 
recognizer.read('trainer/training_data.yml') 
cascadePath = "haarcascade_frontalface_default.xml" 
faceCascade = cv2.CascadeClassifier(cascadePath); 


cam = cv2.VideoCapture(0) 
font = cv2.FONT_HERSHEY_SIMPLEX 
while True: 
    ret, im =cam.read() 
    gray=cv2.cvtColor(im,cv2.COLOR_BGR2GRAY) 
    faces=faceCascade.detectMultiScale(gray, 1.2,5) 
    for(x,y,w,h) in faces: 
     cv2.rectangle(im,(x,y),(x+w,y+h),(225,0,0),2) 
     Id = recognizer.predict(gray[y:y+h,x:x+w]) 
     if(conf<50): 
      if(Id==1): 
       Id="Anirban" 
      elif(Id==2): 
       Id="Sam" 
     else: 
      Id="Unknown" 
     cv2.PutText(cv2.fromarray(im),str(Id), (x,y+h),font, 255) 
    cv2.imshow('im',im) 
    if cv2.waitKey(10) & 0xFF==ord('q'): 
     break 

cam.release() 
cv2.destroyAllWindows() 

Answer 1

打开你的教练，改变recognizer.save到recognizer.write 。不要忘记再次运行教练。这个对我有用。

Answer 2

欢迎来到Stack Overflow。您收到的错误是告诉您，在您要求它进行任何识别之前，您需要在LBPHFaceRecognizer的父类中调用火车方法。请参阅the documentation here。