请修改这一份代码：import random from sklearn import svm from sklearn.metrics import accuracy_score from skimage.feature import hog # 将X_processed列表按3:2的比例随机划分为"员工"和"陌生人"两个集合 def split_dataset(X_processed): random.shuffle(X_processed) split_index = int(len(X_processed) * 3 / 5) employee_set = X_processed[:split_index] stranger_set = X_processed[split_index:] return employee_set, stranger_set # 使用HOG特征提取进行人脸识别训练 def train_face_recognition(employee_set): X = [] = [] for i, face_images in enumerate(employee_set): for face_image in face_images: feature = hog(face_image, orientations=8, pixels_per_cell=(10, 10), cells_per_block=(1, 1), visualize=False) X.append(feature) y.append(i) # i代表员工的标签 clf = svm.SVC() clf.fit(X, y) return clf # 随机抽取一张图片进行识别 def recognize_random_face(clf, X_processed): random_index = random.randint(0, len(X_processed)-1) random_face_images = X_processed[random_index] random_face_image = random.choice(random_face_images) feature = hog(random_face_image, orientations=8, pixels_per_cell=(10, 10), cells_per_block=(1, 1), visualize=False) prediction = clf.predict([feature]) return prediction[0] == random_index # 示例用法 X_processed = [...] # X_processed列表的具体内容 employee_set, stranger_set = split_dataset(X_processed) clf = train_face_recognition(employee_set) result = recognize_random_face(clf, X_processed) print("识别结果：", result)，增加如下功能：如果测试时认为图片不属于员工集中的任何一个员工，prediction应该等于0；“陌生人”集合也应当拥有标签，“陌生人”的标签都是0，代表非员工

以下是根据您的要求修改后的代码：

import random
from sklearn import svm
from sklearn.metrics import accuracy_score
from skimage.feature import hog

# 将X_processed列表按3:2的比例随机划分为"员工"和"陌生人"两个集合
def split_dataset(X_processed):
    random.shuffle(X_processed)
    split_index = int(len(X_processed) * 3 / 5)
    employee_set = X_processed[:split_index]
    stranger_set = X_processed[split_index:]
    return employee_set, stranger_set

# 使用HOG特征提取进行人脸识别训练
def train_face_recognition(employee_set, stranger_set):
    X = []
    y = []
    for i, face_images in enumerate(employee_set):
        for face_image in face_images:
            feature = hog(face_image, orientations=8, pixels_per_cell=(10, 10), cells_per_block=(1, 1), visualize=False)
            X.append(feature)
            y.append(i)  # i代表员工的标签
    for face_images in stranger_set:
        for face_image in face_images:
            feature = hog(face_image, orientations=8, pixels_per_cell=(10, 10), cells_per_block=(1, 1), visualize=False)
            X.append(feature)
            y.append(0)  # 陌生人的标签都设为0
    clf = svm.SVC()
    clf.fit(X, y)
    return clf

# 随机抽取一张图片进行识别
def recognize_random_face(clf, X_processed):
    random_index = random.randint(0, len(X_processed)-1)
    random_face_images = X_processed[random_index]
    random_face_image = random.choice(random_face_images)
    feature = hog(random_face_image, orientations=8, pixels_per_cell=(10, 10), cells_per_block=(1, 1), visualize=False)
    prediction = clf.predict([feature])
    return prediction[0] == random_index or prediction[0] == 0

# 示例用法
X_processed = [...]  # X_processed列表的具体内容
employee_set, stranger_set = split_dataset(X_processed)
clf = train_face_recognition(employee_set, stranger_set)
result = recognize_random_face(clf, X_processed)
print("识别结果：", result)

在上述代码中，我修改了`train_face_recognition`函数，将陌生人集合的人脸图片也作为训练样本，并将标签设为0。这样，如果在识别时判断为陌生人，则预测结果为0。在`recognize_random_face`函数中，如果预测结果为0，则也判定为识别正确。

请注意，上述代码只是示例，您需要根据实际情况进行适当修改。例如，您需要将`X_processed`替换为实际的列表，其中包含50个元素，每个元素是一个含有15张人脸图片的列表。另外，您可能需要根据实际情况调整特征提取的参数。