import os

# 类别名称列表
class_names = ['0', 'head', 'helmet', 'object', 'person']  # 替换为你的类别名称
target_class = ['head', 'helmet']  # 目标类别

def filter_labels(label_directory, output_label_directory):
    if not os.path.exists(output_label_directory):
        os.makedirs(output_label_directory)  # 创建输出标签目录

    # 遍历标签目录中的所有文件
    for label_file in os.listdir(label_directory):
        if label_file.endswith('.txt'):  # 确保是标签文件
            with open(os.path.join(label_directory, label_file), 'r') as file:
                lines = file.readlines()

            # 过滤标签，只保留目标类别
            filtered_lines = []
            for line in lines:
                try:
                    class_id, _, _, _, _ = map(float, line.split())
                    if class_names[int(class_id)] in target_class:
                        filtered_lines.append(line)
                except:
                    print(label_file)

            # 将过滤后的标签写入新的文件
            with open(os.path.join(output_label_directory, label_file), 'w') as file:
                file.writelines(filtered_lines)

# 示例用法
label_directory = '/home/admin-root/haotian/python哈汽锻8安全帽识别/安全帽头数据集/train/labels_raw'  # 替换为你的标签文件夹路径
output_label_directory = '/home/admin-root/haotian/python哈汽锻8安全帽识别/安全帽头数据集/train/labels_filtered'  # 替换为你希望保存过滤后标签的路径
filter_labels(label_directory, output_label_directory)