基于OpenCV- AttributeError的图像处理:模块“cv2”没有属性“face”

Question

我试着按照"trying.py“运行，但是没有错误。怎么修呢？

trying.py

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

# Create Local Binary Patterns Histograms for face recognization
recognizer = cv2.face.LBPHFaceRecognizer_create()

# Using prebuilt frontal face training model, for face detection
detector = cv2.CascadeClassifier("haarcascade_frontalface_default.xml");


# Create method to get the images and label data
def getImagesAndLabels(path):
    # Get all file path
    imagePaths = [os.path.join(path, f) for f in os.listdir(path)]

    # Initialize empty face sample
    faceSamples = []

    # Initialize empty id
    ids = []

    # Loop all the file path
    for imagePath in imagePaths:

        # Get the image and convert it to grayscale
        PIL_img = Image.open(imagePath).convert('L')

        # PIL image to numpy array
        img_numpy = np.array(PIL_img, 'uint8')

        # Get the image id
        id = int(os.path.split(imagePath)[-1].split(".")[1])
        print(id)

        # Get the face from the training images
        faces = detector.detectMultiScale(img_numpy)

        # Loop for each face, append to their respective ID
        for (x, y, w, h) in faces:
            # Add the image to face samples
            faceSamples.append(img_numpy[y:y + h, x:x + w])

            # Add the ID to IDs
            ids.append(id)

    # Pass the face array and IDs array
    return faceSamples, ids


# Get the faces and IDs
faces, ids = getImagesAndLabels('dataset')

# Train the model using the faces and IDs
recognizer.train(faces, np.array(ids))

# Save the model into trainer.yml
recognizer.save('trainer/trainer.yml')

错误：

"C:\Users\HP\PycharmProjects\face_identificiation\trying.py"，跟踪(最近一次调用)：

第12行，在识别器= cv2.face.LBPHFaceRecognizer_create() AttributeError:模块'cv2‘中没有属性“face”

Answer 1

很可能，您安装了错误的OpenCV版本。

导入face将失败(我使用的是v4.6.0)，因为模块没有包含在OpenCv的“正常”安装中。

尝试运行pip list并检查OpenCv版本。我的猜测是，您安装了普通的OpenCv，它将为您提供如下的条目：

opencv-python 4.6.0.66

如果是这样的话，您应该先用pip uninstall opencv-python卸载OpenCv，然后再使用pip install opencv-contrib-python安装带有contrib包的OpenCv。

然后，使用pip list的条目应该包含

opencv-contrib-python 4.6.0.66

这样，您的代码就可以工作了！

编辑:我应该补充一下，您在代码中重写了关键字id，并且应该将变量重命名为其他东西，例如id_doc之类的。

Answer 2

尝试以下命令：

pip install opencv-contrib-python --upgrade

如果它不起作用，可以使用以下命令卸载opencv-：

pip uninstall opencv-contrib-python

再安装一次。