优化ocr检测时间,加载默认模型

config.ini

@@ -2,10 +2,10 @@
 port = 8000
 
 [mysql]
-host = 192.168.110.65
+host = 192.168.110.2
-port = 6975
+port = 13386
 user = video_check
-password = fsjPfhxCs8NrFGmL
+password = taWtMSpXh88SHnps
 database = video_check
 charset = utf8mb4
 

core/detect.py

@@ -44,7 +44,6 @@ def save_db(model_type, client_ip, result):
 
 
 def detectFrame(client_ip, frame):
-
     # YOLO检测
     yolo_flag, yolo_result = yoloDetect(frame, float(BUSINESS_CONFIG["yolo_conf"]))
     if yolo_flag:
@@ -103,36 +102,11 @@ def danger_handler(client_ip):
             json_data=json.dumps(lock_msg)
         )
     )
-
     # 增加危险记录次数
     increment_alarm_count_by_ip(client_ip)
-
     # 更新设备状态为未处理
     update_is_need_handler_by_client_ip(client_ip, 1)
 
-def extract_prohibited_words(ocr_result: str) -> str:
-    """
-    从多文本块的ocr_result中提取所有违禁词（去重后用逗号拼接）
-    适配格式：多个"文本: ... 包含违禁词: ...;"片段
-    """
-    # 用正则匹配所有"包含违禁词: ...;"的片段（非贪婪匹配到分号）
-    # 匹配规则："包含违禁词: "后面的内容，直到遇到";"结束
-    pattern = r"包含违禁词: (.*?);"
-    all_prohibited_segments = re.findall(pattern, ocr_result, re.DOTALL)
-
-    all_words = []
-    for segment in all_prohibited_segments:
-        # 去除每个片段中的置信度信息（如"(置信度: 1.00)"）
-        cleaned = re.sub(r"\s*\([^)]*\)", "", segment.strip())
-        # 分割词语并过滤空值
-        words = [word.strip() for word in cleaned.split(",") if word.strip()]
-        all_words.extend(words)
-
-    # 去重后用逗号拼接
-    unique_words = list(set(all_words))
-    return ",".join(unique_words)
-
-
 def extract_face_names(face_result: str) -> str:
     pattern = r"匹配: (.*?) \("
     all_names = re.findall(pattern, face_result)

ds/db.py

@@ -56,4 +56,4 @@ class Database:
 
 
 # 暴露数据库操作工具
-db = Database()
+db = Database()

service/model_service.py

@@ -1,4 +1,4 @@
-from http.client import HTTPException
+from fastapi import HTTPException
 
 import numpy as np
 import torch
@@ -9,7 +9,7 @@ import os
 from ds.db import db
 from service.file_service import get_absolute_path
 
-# 全局变量
+# 全局变量：初始化时为None，无模型时保持None
 current_yolo_model = None
 current_model_absolute_path = None  # 存储模型绝对路径，不依赖model实例
 
@@ -18,114 +18,173 @@ MAX_MODEL_SIZE = 100 * 1024 * 1024  # 100MB
 
 
 def load_yolo_model():
-    """加载模型并存储绝对路径"""
+    """
+    加载模型并存储绝对路径
+    无有效模型路径/模型文件不存在/加载失败时，跳过加载（不抛出异常）
+    """
     global current_yolo_model, current_model_absolute_path
+    # 1. 获取数据库中的模型路径（无模型时返回None）
     model_rel_path = get_enabled_model_rel_path()
+
+    # 2. 无模型路径时，跳过加载
+    if not model_rel_path:
+        print("[模型初始化] 未获取到有效模型路径，已跳过模型加载")
+        current_yolo_model = None
+        current_model_absolute_path = None
+        return None
+
+    # 3. 有模型路径时，执行正常加载流程
     print(f"[模型初始化] 加载模型：{model_rel_path}")
-
-    # 计算并存储绝对路径
-    current_model_absolute_path = get_absolute_path(model_rel_path)
-    print(f"[模型初始化] 绝对路径：{current_model_absolute_path}")
-
-    # 检查模型文件
-    if not os.path.exists(current_model_absolute_path):
-        raise FileNotFoundError(f"模型文件不存在: {current_model_absolute_path}")
-
     try:
+        # 计算绝对路径（避免路径处理异常）
+        current_model_absolute_path = get_absolute_path(model_rel_path)
+        print(f"[模型初始化] 模型绝对路径：{current_model_absolute_path}")
+
+        # 检查模型文件是否存在
+        if not os.path.exists(current_model_absolute_path):
+            print(f"[模型初始化] 警告：模型文件不存在（{current_model_absolute_path}），已跳过加载")
+            current_yolo_model = None
+            current_model_absolute_path = None
+            return None
+
+        # 加载YOLO模型
         new_model = YOLO(current_model_absolute_path)
+        # 设备分配（GPU/CPU）
         if torch.cuda.is_available():
             new_model.to('cuda')
-            print("模型已移动到GPU")
+            print("[模型初始化] 模型已移动到GPU设备")
         else:
-            print("使用CPU进行推理")
+            print("[模型初始化] 未检测到GPU，使用CPU进行推理")
+
+        # 更新全局模型变量
         current_yolo_model = new_model
-        print(f"成功加载模型: {current_model_absolute_path}")
+        print(f"[模型初始化] 成功加载模型：{current_model_absolute_path}")
         return current_yolo_model
+
+    # 捕获所有加载异常，避免中断项目启动
     except Exception as e:
-        print(f"模型加载失败：{str(e)}")
+        print(f"[模型初始化] 警告：模型加载失败（{str(e)}），已跳过加载")
-        raise
+        current_yolo_model = None
+        current_model_absolute_path = None
+        return None
 
 
 def get_current_model():
-    """获取当前模型实例"""
+    """
-    if current_yolo_model is None:
+    获取当前模型实例
-        raise ValueError("尚未加载任何YOLO模型，请先调用load_yolo_model加载模型")
+    无模型时返回None（不抛出异常，避免中断流程）
+    """
     return current_yolo_model
 
 
 def detect(image_np, conf_threshold=0.8):
-    # 1. 输入格式验证
+    """
+    执行YOLO检测
+    无模型时返回明确提示，不崩溃；有模型时正常返回检测结果
+    """
+    # 优先检查模型是否已加载
+    model = get_current_model()
+    if not model:
+        error_msg = "检测失败：未加载任何YOLO模型（数据库中无默认模型或模型加载失败）"
+        print(f"[检测流程] {error_msg}")
+        return False, error_msg  # 返回False+错误提示，而非None
+
+    # 2. 输入格式验证（保留原逻辑，格式错误仍抛异常，属于参数问题）
     if not isinstance(image_np, np.ndarray):
-        raise ValueError("输入必须是numpy数组（BGR图像）")
+        raise ValueError("输入必须是numpy数组（BGR图像格式）")
     if image_np.ndim != 3 or image_np.shape[-1] != 3:
-        raise ValueError(f"输入图像格式错误，需为 (h, w, 3) 的BGR数组，当前shape: {image_np.shape}")
+        raise ValueError(f"输入图像格式错误，需为 (高度, 宽度, 3) 的BGR数组，当前shape: {image_np.shape}")
+
     detection_results = []
     try:
-        model = get_current_model()
+        # 3. 检测配置
-        if not current_model_absolute_path:
-            raise RuntimeError("模型未初始化！请先调用 load_yolo_model 加载模型")
         device = "cuda" if torch.cuda.is_available() else "cpu"
-        print(f"检测设备：{device} | 置信度阈值：{conf_threshold}")
-
-        # 图像尺寸信息
         img_height, img_width = image_np.shape[:2]
-        print(f"输入图像尺寸：{img_width}x{img_height}")
+        print(f"[检测流程] 设备：{device} | 置信度阈值：{conf_threshold} | 图像尺寸：{img_width}x{img_height}")
 
-        # YOLO检测
+        # 4. 执行YOLO预测
-        print("执行YOLO检测")
+        print("[检测流程] 开始执行YOLO检测")
         results = model.predict(
             image_np,
             conf=conf_threshold,
             device=device,
-            show=False,
+            show=False,  # 不显示检测窗口
+            verbose=False  # 关闭YOLO内部日志（可选，减少冗余输出）
         )
 
-        # 4. 整理检测结果（仅保留Chest类别，ID=2）
+        # 5. 整理检测结果（仅保留置信度达标结果，原逻辑保留）
         for box in results[0].boxes:
-            class_id = int(box.cls[0])  # 类别ID
+            class_id = int(box.cls[0])
             class_name = model.names[class_id]
             confidence = float(box.conf[0])
+            # 转换为整数坐标（x1, y1, x2, y2）
             bbox = tuple(map(int, box.xyxy[0]))
 
-            # 过滤条件：置信度达标 + 类别为Chest（class_id=2）
+            # 过滤条件：置信度达标
-            # and class_id == 2
+            if confidence >= conf_threshold and 0 <= class_id <= 5:
-            if confidence >= conf_threshold:
                 detection_results.append({
                     "class": class_name,
-                    "confidence": confidence,
+                    "confidence": round(confidence, 4),  # 保留4位小数，优化输出
                     "bbox": bbox
                 })
 
-        # 判断是否有目标
+        # 6. 判断是否检测到目标
         has_content = len(detection_results) > 0
+        print(f"[检测流程] 检测完成：共检测到 {len(detection_results)} 个目标")
         return has_content, detection_results
 
+    # 7. 捕获检测过程异常，返回明确错误信息
     except Exception as e:
         error_msg = f"检测过程出错：{str(e)}"
-        print(error_msg)
+        print(f"[检测流程] {error_msg}")
-        return False, None
+        return False, error_msg
 
 
 def get_enabled_model_rel_path():
-    """获取数据库中启用的模型相对路径"""
+    """
+    从数据库获取启用的默认模型相对路径
+    无模型/数据库错误时返回None，仅记录警告日志
+    """
     conn = None
     cursor = None
     try:
+        # 建立数据库连接
         conn = db.get_connection()
         cursor = conn.cursor(dictionary=True)
+        # 查询默认模型（is_default=1）
         query = "SELECT path FROM model WHERE is_default = 1 LIMIT 1"
         cursor.execute(query)
         result = cursor.fetchone()
 
-        if not result or not result.get('path'):
+        # 有有效路径则返回，否则返回None
-            raise HTTPException(status_code=404, detail="未找到启用的默认模型")
+        if result and isinstance(result.get('path'), str) and result['path'].strip():
+            model_path = result['path'].strip()
+            print(f"找到默认模型路径：{model_path}")
+            return model_path
+        else:
+            print("警告：未找到启用的默认模型")
+            return None
 
-        return result['path']
+    # 捕获MySQL相关错误
     except MySQLError as e:
-        raise HTTPException(status_code=500, detail=f"查询默认模型时发生数据库错误：{str(e)}") from e
+        print(f"警告：查询默认模型时发生数据库错误（{str(e)}）")
+        return None
+    # 捕获其他通用错误
     except Exception as e:
-        if isinstance(e, HTTPException):
+        print(f"[数据库查询] 警告：获取默认模型路径失败（{str(e)}）")
-            raise e
+        return None
-        raise HTTPException(status_code=500, detail=f"获取默认模型路径失败：{str(e)}") from e
+    # 确保数据库连接和游标关闭
     finally:
-        db.close_connection(conn, cursor)
+        if cursor:
+            try:
+                cursor.close()
+                print("游标已关闭")
+            except Exception as e:
+                print(f"关闭游标时出错：{str(e)}")
+        # 关闭连接（允许重复关闭，无需检查是否已关闭）
+        if conn:
+            try:
+                conn.close()
+                print("数据库连接已关闭")
+            except Exception as e:
+                print(f"关闭数据库连接时出错：{str(e)}")

service/ocr_service.py

@@ -1,4 +1,4 @@
-# 首先添加NumPy兼容处理
+import time
 import numpy as np
 
 # 修复np.int已弃用的问题
@@ -8,29 +8,120 @@ if not hasattr(np, 'int'):
 from paddleocr import PaddleOCR
 from service.sensitive_service import get_all_sensitive_words
 
+
+# AC自动机节点定义
+class AhoNode:
+    def __init__(self):
+        self.children = {}  # 子节点映射（字符->节点）
+        self.fail = None  # 失败指针（类似KMP的next数组）
+        self.is_end = False  # 标记是否为某个模式串的结尾
+        self.word = None  # 存储当前结尾对应的完整违禁词
+
+
+# AC自动机实现（多模式字符串匹配）
+class AhoCorasick:
+    def __init__(self):
+        self.root = AhoNode()  # 根节点
+
+    def add_word(self, word):
+        """添加违禁词到Trie树"""
+        if not isinstance(word, str) or not word.strip():
+            return  # 过滤无效词
+        node = self.root
+        for char in word:
+            if char not in node.children:
+                node.children[char] = AhoNode()
+            node = node.children[char]
+        node.is_end = True
+        node.word = word  # 记录完整词
+
+    def build_fail(self):
+        """构建失败指针（BFS遍历）"""
+        queue = []
+        # 根节点的子节点失败指针指向根节点
+        for child in self.root.children.values():
+            child.fail = self.root
+            queue.append(child)
+
+        # BFS处理其他节点
+        while queue:
+            current_node = queue.pop(0)
+            # 遍历当前节点的所有子节点
+            for char, child in current_node.children.items():
+                # 寻找失败指针目标节点
+                fail_node = current_node.fail
+                while fail_node is not None and char not in fail_node.children:
+                    fail_node = fail_node.fail
+                # 确定失败指针指向
+                child.fail = fail_node.children[char] if (fail_node and char in fail_node.children) else self.root
+                queue.append(child)
+
+    def match(self, text):
+        """匹配文本中所有出现的违禁词（去重）"""
+        result = set()
+        node = self.root
+        for char in text:
+            # 沿失败链查找可用节点
+            while node is not None and char not in node.children:
+                node = node.fail
+            # 重置到根节点（如果没找到）
+            node = node.children[char] if (node and char in node.children) else self.root
+
+            # 收集所有匹配的违禁词（包括失败链上的）
+            temp = node
+            while temp != self.root:
+                if temp.is_end:
+                    result.add(temp.word)
+                temp = temp.fail
+        return list(result)
+
+
+# 全局变量
 _ocr_engine = None
-_forbidden_words = set()
+_ac_automaton = None  # 替换原有的_forbidden_words集合
 _conf_threshold = 0.5
 
+
 def set_forbidden_words(new_words):
-    global _forbidden_words
+    """更新违禁词（使用AC自动机存储）"""
+    global _ac_automaton
     if not isinstance(new_words, (set, list, tuple)):
         raise TypeError("新违禁词必须是集合、列表或元组类型")
-    _forbidden_words = set(new_words)  # 确保是集合类型
+
-    print(f"已通过函数更新违禁词，当前数量: {len(_forbidden_words)}")
+    # 初始化AC自动机并添加有效词
+    _ac_automaton = AhoCorasick()
+    valid_words = [word for word in new_words if isinstance(word, str) and word.strip()]
+    for word in valid_words:
+        _ac_automaton.add_word(word.strip())
+    # 构建失败指针（关键步骤）
+    _ac_automaton.build_fail()
+
+    print(f"已通过函数更新违禁词，当前数量: {len(valid_words)}")
+
 
 def load_forbidden_words():
-    global _forbidden_words
+    """从敏感词服务加载违禁词并初始化AC自动机"""
+    global _ac_automaton
     try:
-        _forbidden_words = get_all_sensitive_words()
+        sensitive_words = get_all_sensitive_words()  # 保持原接口不变（返回list[str]）
-        print(f"加载的违禁词数量: {len(_forbidden_words)}")
+        _ac_automaton = AhoCorasick()
+
+        # 添加所有有效敏感词
+        valid_words = [word for word in sensitive_words if isinstance(word, str) and word.strip()]
+        for word in valid_words:
+            _ac_automaton.add_word(word.strip())
+
+        # 构建失败指针
+        _ac_automaton.build_fail()
+        print(f"加载的违禁词数量: {len(valid_words)}")
+        return True
     except Exception as e:
         print(f"Forbidden words load error: {e}")
         return False
-    return True
 
 
 def init_ocr_engine():
+    """初始化OCR引擎和违禁词自动机"""
     global _ocr_engine
     try:
         _ocr_engine = PaddleOCR(
@@ -52,34 +143,39 @@ def init_ocr_engine():
 
 
 def detect(frame, conf_threshold=0.8):
+    """检测帧中的文本是否包含违禁词（拆分OCR和匹配时间）"""
     print("开始进行OCR检测...")
+    total_start = time.time()  # 总耗时开始
+    ocr_time = 0.0  # OCR及结果解析耗时
+    match_time = 0.0  # 违禁词匹配耗时
+
     try:
+        if not _ocr_engine or not _ac_automaton:
+            return (False, "OCR引擎或违禁词库未初始化")
+
+        # 1. OCR识别及结果解析阶段
+        ocr_start = time.time()
         ocr_res = _ocr_engine.ocr(frame, cls=True)
         if not ocr_res or not isinstance(ocr_res, list):
             return (False, "无OCR结果")
 
         texts = []
         confs = []
+        # 解析OCR结果
         for line in ocr_res:
             if line is None:
                 continue
-            if isinstance(line, list):
+            items_to_process = line if isinstance(line, list) else [line]
-                items_to_process = line
-            else:
-                items_to_process = [line]
 
             for item in items_to_process:
+                # 过滤坐标类数据
                 if isinstance(item, list) and len(item) == 4:
-                    is_coordinate = True
+                    is_coordinate = all(isinstance(p, list) and len(p) == 2 and
-                    for point in item:
+                                        all(isinstance(c, (int, float)) for c in p)
-                        if not (isinstance(point, list) and len(point) == 2 and
+                                        for p in item)
-                                all(isinstance(coord, (int, float)) for coord in point)):
-                            is_coordinate = False
-                            break
                     if is_coordinate:
                         continue
-                if isinstance(item, list) and all(isinstance(x, (int, float)) for x in item):
+                # 提取文本和置信度
-                    continue
                 if isinstance(item, tuple) and len(item) == 2:
                     text, conf = item
                     if isinstance(text, str) and isinstance(conf, (int, float)):
@@ -98,22 +194,26 @@ def detect(frame, conf_threshold=0.8):
                         texts.append(text_data.strip())
                         confs.append(1.0)
                         continue
-                print(f"无法解析的OCR结果格式: {item}")
+        ocr_end = time.time()
+        ocr_time = ocr_end - ocr_start  # 计算OCR阶段耗时
 
         if len(texts) != len(confs):
             return (False, "OCR结果格式异常")
 
-        # 收集所有识别到的违禁词（去重且保持出现顺序）
+        # 2. 违禁词匹配阶段
+        match_start = time.time()
         vio_words = []
         for txt, conf in zip(texts, confs):
-            if conf < _conf_threshold:  # 过滤低置信度结果
+            if conf < _conf_threshold:
                 continue
-            # 提取当前文本中包含的违禁词
+            # 用AC自动机匹配当前文本中的所有违禁词
-            matched = [w for w in _forbidden_words if w in txt]
+            matched_words = _ac_automaton.match(txt)
-            # 仅添加未记录过的违禁词（去重）
+            # 全局去重并保持顺序
-            for word in matched:
+            for word in matched_words:
                 if word not in vio_words:
                     vio_words.append(word)
+        match_end = time.time()
+        match_time = match_end - match_start  # 计算匹配阶段耗时
 
         has_text = len(texts) > 0
         has_violation = len(vio_words) > 0
@@ -121,11 +221,17 @@ def detect(frame, conf_threshold=0.8):
         if not has_text:
             return (False, "未识别到文本")
         elif has_violation:
-            # 多个违禁词用逗号拼接
             return (True, ", ".join(vio_words))
         else:
             return (False, "未检测到违禁词")
 
     except Exception as e:
         print(f"OCR detect error: {e}")
-        return (False, f"检测错误: {str(e)}")
+        return (False, f"检测错误: {str(e)}")
+    finally:
+        # 打印各阶段耗时
+        total_time = time.time() - total_start
+        print(f"当前帧耗时明细：")
+        print(f"  OCR识别及解析：{ocr_time:.8f}秒")
+        print(f"  违禁词匹配：{match_time:.8f}秒")
+        print(f"  总耗时：{total_time:.8f}秒")