Pyhton的人脸识别代码如下：

#!usr/bin/env?python

#coding:utf‐8

import sys

sys.path.append('C:\\Users\\Heyden\\AppData\\Local\\Programs\\Python\\Python37-32\\Lib\\site-packages\\')

import cv2

import os

import numpy as np

from PIL import Image

#?recognizer?=?cv2.createLBPHFaceRecognizer()

detector = cv2.CascadeClassifier("haarcascade_frontalface_default.xml")

recognizer = cv2.face.LBPHFaceRecognizer_create()

def get_images_and_labels(path):

? ? image_paths = [os.path.join(path, f) for f in os.listdir(path)]

? ? face_samples = []

? ? ids = []

? ? for image_path in image_paths:

? ? ? ? image = Image.open(image_path).convert('L')

? ? ? ? image_np = np.array(image, 'uint8')

? ? ? ? if os.path.split(image_path)[-1].split(".")[-1] != 'jpg':

? ? ? ? ? ? continue

? ? ? ? image_id = int(os.path.split(image_path)[-1].split(".")[1])

? ? ? ? faces = detector.detectMultiScale(image_np)

? ? ? ? for (x, y, w, h) in faces:

? ? ? ? ? ? face_samples.append(image_np[y:y + h, x:x + w])

? ? ? ? ? ? ids.append(image_id)

? ? return face_samples, ids

faces, Ids = get_images_and_labels('C:\\Users\\Heyden\\PycharmProjects\\face\\data_set')

recognizer.train(faces, np.array(Ids))

recognizer.save('C:\\Users\\Heyden\\PycharmProjects\\face\\trainner\\trainner.yml')

执行代码报错：

Traceback (most recent call last):

? File "C:\Users\Heyden\PycharmProjects\face\trainner2.py", line 13, in <module>

? ? recognizer = cv2.face.LBPHFaceRecognizer_create()

AttributeError: module 'cv2.cv2' has no attribute 'face'

Process finished with exit code 1

（划线的部分即问题所在）

问题分析：主要原因是OpenCV的扩展?？镺pencv_contrib没有找到的原因

解决方法：cmd命令行下? ——? pip install opencv_contrib_python?

验证：代码测试通过，实现人脸识别数据集的训练。