2025-09-02 19:49:54 +08:00
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import os
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import cv2
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2025-09-02 21:30:28 +08:00
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import logging
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2025-09-02 19:49:54 +08:00
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from rapidocr import RapidOCR
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class OCRViolationDetector:
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"""
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封装RapidOCR引擎,用于检测图像帧中的违禁词。
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2025-09-03 14:38:42 +08:00
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核心功能:加载违禁词、初始化OCR引擎、单帧图像违禁词检测
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2025-09-02 19:49:54 +08:00
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"""
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2025-09-03 14:38:42 +08:00
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def __init__(self,
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forbidden_words_path: str,
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ocr_config_path: str,
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ocr_confidence_threshold: float = 0.5,
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log_level: int = logging.INFO,
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log_file: str = None):
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2025-09-02 19:49:54 +08:00
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"""
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2025-09-02 21:30:28 +08:00
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初始化OCR引擎、违禁词列表和日志配置。
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2025-09-02 19:49:54 +08:00
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Args:
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forbidden_words_path (str): 违禁词列表 .txt 文件的路径。
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2025-09-03 14:38:42 +08:00
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ocr_config_path (str): OCR配置文件(如1.yaml)的路径。
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ocr_confidence_threshold (float): OCR识别结果的置信度阈值(0~1)。
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log_level (int): 日志级别,默认为logging.INFO。
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log_file (str, optional): 日志文件路径,如不提供则只输出到控制台。
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2025-09-02 19:49:54 +08:00
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"""
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2025-09-03 14:38:42 +08:00
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# 初始化日志(确保先初始化日志,后续操作可正常打日志)
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self.logger = self._setup_logger(log_level, log_file)
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2025-09-03 14:38:42 +08:00
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# 加载违禁词(优先级:先加载配置,再初始化引擎)
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self.forbidden_words = self._load_forbidden_words(forbidden_words_path)
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2025-09-02 21:30:28 +08:00
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# 初始化RapidOCR引擎(传入配置文件路径)
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self.ocr_engine = self._initialize_ocr(ocr_config_path)
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# 校验核心依赖是否就绪
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self._check_dependencies()
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# 设置置信度阈值(限制在0~1范围,避免非法值)
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self.OCR_CONFIDENCE_THRESHOLD = max(0.0, min(ocr_confidence_threshold, 1.0))
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self.logger.info(f"OCR置信度阈值已设置(范围0~1): {self.OCR_CONFIDENCE_THRESHOLD:.4f}")
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def _setup_logger(self, log_level: int, log_file: str = None) -> logging.Logger:
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"""
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2025-09-03 14:38:42 +08:00
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配置日志系统(避免重复添加处理器,支持控制台+文件双输出)
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Args:
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log_level: 日志级别(如logging.DEBUG、logging.INFO)。
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log_file: 日志文件路径,为None时仅输出到控制台。
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Returns:
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logging.Logger: 配置好的日志实例。
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"""
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logger = logging.getLogger('OCRViolationDetector')
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logger.setLevel(log_level)
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# 避免重复添加处理器(防止日志重复输出)
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if logger.handlers:
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return logger
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2025-09-03 14:38:42 +08:00
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# 定义日志格式(包含时间、模块名、级别、内容)
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formatter = logging.Formatter(
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'%(asctime)s - %(name)s - %(levelname)s - %(message)s',
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datefmt='%Y-%m-%d %H:%M:%S'
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)
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# 1. 添加控制台处理器
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console_handler = logging.StreamHandler()
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console_handler.setFormatter(formatter)
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logger.addHandler(console_handler)
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# 2. 若指定日志文件,添加文件处理器(自动创建目录)
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if log_file:
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try:
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log_dir = os.path.dirname(log_file)
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# 若日志目录不存在,自动创建
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if log_dir and not os.path.exists(log_dir):
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os.makedirs(log_dir, exist_ok=True)
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self.logger.debug(f"自动创建日志目录: {log_dir}")
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file_handler = logging.FileHandler(log_file, encoding='utf-8')
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file_handler.setFormatter(formatter)
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logger.addHandler(file_handler)
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logger.info(f"日志文件已配置: {log_file}")
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except Exception as e:
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logger.warning(f"创建日志文件失败(仅控制台输出): {str(e)}")
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return logger
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def _load_forbidden_words(self, path: str) -> set:
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"""
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从TXT文件加载违禁词(去重、过滤空行,支持UTF-8编码)
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Args:
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path (str): 违禁词TXT文件路径。
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Returns:
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set: 去重后的违禁词集合(空集合表示加载失败)。
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"""
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forbidden_words = set()
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# 第一步:检查文件是否存在
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if not os.path.exists(path):
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self.logger.error(f"违禁词文件不存在: {path}")
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return forbidden_words
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# 第二步:读取文件并处理内容
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try:
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with open(path, 'r', encoding='utf-8') as f:
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# 过滤空行、去除首尾空格、去重
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forbidden_words = {
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line.strip() for line in f
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if line.strip() # 跳过空行或纯空格行
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}
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self.logger.info(f"成功加载违禁词: {len(forbidden_words)} 个(已去重)")
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self.logger.debug(f"违禁词列表: {forbidden_words}")
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except UnicodeDecodeError:
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self.logger.error(f"违禁词文件编码错误(需UTF-8): {path}")
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except PermissionError:
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self.logger.error(f"无权限读取违禁词文件: {path}")
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except Exception as e:
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self.logger.error(f"加载违禁词失败: {str(e)}", exc_info=True)
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return forbidden_words
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def _initialize_ocr(self, config_path: str) -> RapidOCR | None:
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"""
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初始化RapidOCR引擎(校验配置文件、捕获初始化异常)
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Args:
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config_path (str): RapidOCR配置文件(如1.yaml)路径。
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Returns:
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RapidOCR | None: OCR引擎实例(None表示初始化失败)。
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"""
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self.logger.info("开始初始化RapidOCR引擎...")
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# 第一步:检查配置文件是否存在
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if not os.path.exists(config_path):
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self.logger.error(f"OCR配置文件不存在: {config_path}")
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return None
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# 第二步:初始化OCR引擎(捕获RapidOCR相关异常)
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try:
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ocr_engine = RapidOCR(config_path=config_path)
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self.logger.info("RapidOCR引擎初始化成功")
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return ocr_engine
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except ImportError:
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self.logger.error("RapidOCR依赖未安装(需执行:pip install rapidocr-onnxruntime)")
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except Exception as e:
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self.logger.error(f"RapidOCR初始化失败: {str(e)}", exc_info=True)
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return None
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def _check_dependencies(self) -> None:
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"""校验OCR引擎和违禁词列表是否就绪(输出警告日志)"""
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if not self.ocr_engine:
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self.logger.warning("⚠️ OCR引擎未就绪,违禁词检测功能将禁用")
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if not self.forbidden_words:
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self.logger.warning("⚠️ 违禁词列表为空,违禁词检测功能将禁用")
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def detect(self, frame) -> tuple[bool, list, list]:
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"""
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对单帧图像进行OCR违禁词检测(核心方法)
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Args:
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frame: 输入图像帧(NumPy数组,BGR格式,cv2读取的图像)。
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Returns:
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tuple[bool, list, list]:
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- 第一个元素:是否检测到违禁词(True/False);
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- 第二个元素:检测到的违禁词列表(空列表表示无违禁词);
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- 第三个元素:对应违禁词的置信度列表(与违禁词列表一一对应)。
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"""
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# 初始化返回结果
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has_violation = False
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violation_words = []
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violation_confs = []
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# 前置校验:1. 图像帧是否有效 2. OCR引擎是否就绪 3. 违禁词是否存在
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if frame is None or frame.size == 0:
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self.logger.warning("输入图像帧为空或无效,跳过OCR检测")
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return has_violation, violation_words, violation_confs
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if not self.ocr_engine or not self.forbidden_words:
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self.logger.debug("OCR引擎未就绪或违禁词为空,跳过OCR检测")
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return has_violation, violation_words, violation_confs
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try:
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# 1. 执行OCR识别(获取RapidOCR原始结果)
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self.logger.debug("开始执行OCR识别...")
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ocr_result = self.ocr_engine(frame)
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self.logger.debug(f"RapidOCR原始结果: {ocr_result}")
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# 2. 校验OCR结果是否有效(避免None或格式异常)
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if ocr_result is None:
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self.logger.debug("OCR识别未返回任何结果(图像无文本或识别失败)")
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return has_violation, violation_words, violation_confs
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# 3. 检查txts和scores是否存在且不为None
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if not hasattr(ocr_result, 'txts') or ocr_result.txts is None:
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self.logger.warning("OCR结果中txts为None或不存在")
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return has_violation, violation_words, violation_confs
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if not hasattr(ocr_result, 'scores') or ocr_result.scores is None:
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self.logger.warning("OCR结果中scores为None或不存在")
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return has_violation, violation_words, violation_confs
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# 4. 转为列表并去None(防止单个元素为None)
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# 确保txts是可迭代的,如果不是则转为空列表
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if not isinstance(ocr_result.txts, (list, tuple)):
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self.logger.warning(f"OCR txts不是可迭代类型,实际类型: {type(ocr_result.txts)}")
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texts = []
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else:
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texts = [txt.strip() for txt in ocr_result.txts if txt and isinstance(txt, str)]
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# 确保scores是可迭代的,如果不是则转为空列表
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if not isinstance(ocr_result.scores, (list, tuple)):
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self.logger.warning(f"OCR scores不是可迭代类型,实际类型: {type(ocr_result.scores)}")
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confidences = []
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else:
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confidences = [conf for conf in ocr_result.scores if conf and isinstance(conf, (int, float))]
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# 5. 校验文本和置信度列表长度是否一致(避免zip迭代错误)
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if len(texts) != len(confidences):
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self.logger.warning(
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f"OCR文本与置信度数量不匹配(文本{len(texts)}个,置信度{len(confidences)}个),跳过检测")
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return has_violation, violation_words, violation_confs
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if len(texts) == 0:
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self.logger.debug("OCR未识别到任何有效文本")
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return has_violation, violation_words, violation_confs
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# 6. 遍历识别结果,筛选违禁词(按置信度阈值过滤)
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self.logger.debug(f"开始筛选违禁词(阈值{self.OCR_CONFIDENCE_THRESHOLD:.4f})")
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2025-09-02 19:49:54 +08:00
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for text, conf in zip(texts, confidences):
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2025-09-03 14:38:42 +08:00
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# 过滤低置信度结果
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2025-09-02 19:49:54 +08:00
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if conf < self.OCR_CONFIDENCE_THRESHOLD:
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2025-09-03 14:38:42 +08:00
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self.logger.debug(f"文本 '{text}' 置信度{conf:.4f} < 阈值,跳过")
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2025-09-02 19:49:54 +08:00
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continue
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2025-09-03 14:38:42 +08:00
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# 检查当前文本是否包含违禁词(支持一个文本含多个违禁词)
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matched_words = [word for word in self.forbidden_words if word in text]
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if matched_words:
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has_violation = True
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# 记录所有匹配的违禁词和对应置信度
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violation_words.extend(matched_words)
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violation_confs.extend([conf] * len(matched_words)) # 一个文本对应多个违禁词时,置信度复用
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self.logger.warning(f"检测到违禁词: {matched_words}(来源文本: '{text}',置信度: {conf:.4f})")
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2025-09-02 19:49:54 +08:00
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except Exception as e:
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2025-09-03 14:38:42 +08:00
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# 捕获所有异常,确保不中断上层调用
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self.logger.error(f"OCR检测过程异常: {str(e)}", exc_info=True)
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return has_violation, violation_words, violation_confs
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