无法将os.path.split(ImagePath)[-1].split(‘.)[1]转换为整数

Question

我正在尝试使用OpenCV创建一个人脸识别软件，但是我在库中找到的代码是用Python2编写的，有Python3版本吗？

这里有个链接：https://github.com/thecodacus/Face-Recognition

我已经有了一个数据集和训练器的文件夹。

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

# Path for face image database
path = 'dataset'

recognizer = cv2.face.LBPHFaceRecognizer_create()
detector = cv2.CascadeClassifier("haarcascade_frontalface_default.xml");

# function to get the images and label data
def getImagesAndLabels(path):

    imagePaths = [os.path.join(path,f) for f in os.listdir(path)]     
    faceSamples=[]
    ids = []

    for imagePath in imagePaths:

        PIL_img = Image.open(imagePath).convert('L') # convert it to grayscale
        img_numpy = np.array(PIL_img,'uint8')

        id = int(os.path.split(imagePath)[-1].split('.')[1])
        faces = detector.detectMultiScale(img_numpy)

        for (x,y,w,h) in faces:
            faceSamples.append(img_numpy[y:y+h,x:x+w])
            ids.append(id)

    return faceSamples,ids

print ("\n [INFO] Training faces. It will take a few seconds. Wait ...")
faces,ids = getImagesAndLabels(path)
recognizer.train(faces, np.array(ids))

# Save the model into trainer/trainer.yml
recognizer.write('trainer/trainer.yml') # recognizer.save() worked on Mac, but not on Pi

# Print the numer of faces trained and end program
print("\n [INFO] {0} faces trained. Exiting Program".format(len(np.unique(ids))))

错误：

Traceback (most recent call last):
  File "/Users/user/Desktop/FacialRecognition/02_face_training.py", line 46, in <module>
faces,ids = getImagesAndLabels(path)
  File "/Users/user/Desktop/FacialRecognition/02_face_training.py", line 36, in getImagesAndLabels
id = int(os.path.split(imagePath)[-1].split('.')[1])
ValueError: invalid literal for int() with base 10: 'User'

Answer 1

在该存储库上有一个dataSet目录，其中包含一个名为以下内容的文件：

In [665]: name='Face-Recognition/dataSet/face-1.1.jpg'               

应用于该名称，您的代码示例执行以下操作：

In [668]: os.path.split(name)                                                                          
Out[668]: ('Face-Recognition/dataSet', 'face-1.1.jpg')
In [669]: os.path.split(name)[-1]                                                                      
Out[669]: 'face-1.1.jpg'
In [670]: os.path.split(name)[-1].split('.')                                                           
Out[670]: ['face-1', '1', 'jpg']
In [671]: os.path.split(name)[-1].split('.')[1]                                                        
Out[671]: '1'
In [672]: int(os.path.split(name)[-1].split('.')[1])                                                   
Out[672]: 1

显然，您的文件具有不同的名称格式，在代码需要一个数字的位置包含“User”。

您需要更正文件名，或更改此解析代码。

Answer 2

您在数据集中获得的映像名称为User.*somename*，因此请从所有映像名称中删除User。

Answer 3

尝试改变格式图像是'face.1.1.jpg‘，然后你可以用这个代码分割圆点

faceID = int(os.path.split(imagePath)[-1].split(".")[2])