7aa71c5f83
本次提交实现了完整的人员行为分析系统，包括： 1. 新增基于位置和跟踪ID的两种行为检测算法 2. 新增徘徊检测服务与行为处理器模块 3. 前后端集成算法配置界面与告警展示 4. 支持图片和视频流场景下的行为分析 5. 新增算法配置接口与文档说明 具体改动： - 新增loitering_detection模型目录与算法实现 - 新增AlgorithmConfig组件实现可视化配置 - 扩展图片/视频检测接口支持算法参数传递 - 新增行为告警推送与前端展示页面 - 优化检测服务，集成行为分析逻辑 - 移除冗余日志输出，完善代码注释
169 lines
5.8 KiB
Python
169 lines
5.8 KiB
Python
"""
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徘徊检测服务
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集成行为检测算法到后端服务
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"""
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import sys
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import os
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from typing import Dict, List, Optional
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import logging
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# 添加算法模块路径
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sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', '..', '..', 'models', 'loitering_detection'))
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from processors import BehaviorProcessor
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logger = logging.getLogger(__name__)
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class LoiteringService:
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"""
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徘徊检测服务
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为视频流检测提供行为分析功能：
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- 静止检测（基于位置，无需跟踪）
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- 徘徊检测（基于跟踪ID）
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"""
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def __init__(self):
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self.processor = None
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self.is_initialized = False
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def initialize(
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self,
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stationary_threshold: float = 10.0,
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position_tolerance: int = 50,
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loitering_threshold: float = 300.0,
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movement_threshold: float = 5.0,
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enable_stationary_alert: bool = True,
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enable_loitering_alert: bool = True,
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stationary_alert_threshold: Optional[float] = None,
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loitering_alert_threshold: Optional[float] = None
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):
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"""
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初始化服务
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Args:
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stationary_threshold: 静止检测阈值（秒）- 用于判断是否静止
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position_tolerance: 位置容差（像素）
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loitering_threshold: 徘徊检测阈值（秒）- 用于判断是否徘徊
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movement_threshold: 移动阈值（像素）
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enable_stationary_alert: 是否启用静止告警
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enable_loitering_alert: 是否启用徘徊告警
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stationary_alert_threshold: 静止告警阈值（秒）- 超过此时间产生告警，默认等于 stationary_threshold
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loitering_alert_threshold: 徘徊告警阈值（秒）- 超过此时间产生告警，默认等于 loitering_threshold
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"""
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try:
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self.processor = BehaviorProcessor(
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stationary_threshold=stationary_threshold,
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position_tolerance=position_tolerance,
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loitering_threshold=loitering_threshold,
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movement_threshold=movement_threshold,
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enable_stationary_alert=enable_stationary_alert,
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enable_loitering_alert=enable_loitering_alert,
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stationary_alert_threshold=stationary_alert_threshold if stationary_alert_threshold is not None else stationary_threshold,
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loitering_alert_threshold=loitering_alert_threshold if loitering_alert_threshold is not None else loitering_threshold
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)
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self.is_initialized = True
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logger.info(f"徘徊检测服务初始化成功: 静止阈值={stationary_threshold}s, 告警阈值={stationary_alert_threshold or stationary_threshold}s")
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except Exception as e:
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logger.error(f"徘徊检测服务初始化失败: {e}")
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self.is_initialized = False
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def process_detections(
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self,
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detections: List[Dict],
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use_tracking: bool = False,
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track_id_key: str = 'track_id'
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) -> Dict:
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"""
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处理检测结果
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Args:
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detections: YOLO检测结果列表
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use_tracking: 是否使用跟踪ID
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track_id_key: 跟踪ID字段名
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Returns:
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{
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'detections': 添加行为信息的检测结果,
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'alerts': 触发的告警列表,
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'stats': 统计信息
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}
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"""
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if not self.is_initialized or not self.processor:
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return {
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'detections': detections,
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'alerts': [],
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'stats': {'error': '服务未初始化'}
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}
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try:
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return self.processor.process(
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detections=detections,
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use_tracking=use_tracking,
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track_id_key=track_id_key
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)
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except Exception as e:
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logger.error(f"处理检测结果失败: {e}")
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return {
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'detections': detections,
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'alerts': [],
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'stats': {'error': str(e)}
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}
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def get_stationary_persons(self) -> List[Dict]:
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"""获取所有静止人员"""
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if not self.is_initialized or not self.processor:
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return []
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return self.processor.get_stationary_persons()
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def get_loitering_persons(self) -> List[Dict]:
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"""获取所有徘徊人员"""
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if not self.is_initialized or not self.processor:
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return []
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return self.processor.get_loitering_persons()
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def reset(self):
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"""重置检测器"""
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if self.processor:
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self.processor.reset()
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logger.info("徘徊检测器已重置")
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def get_config(self) -> Dict:
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"""获取当前配置"""
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if not self.is_initialized or not self.processor:
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return {'error': '服务未初始化'}
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return self.processor.get_config()
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def get_stats(self) -> Dict:
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"""获取统计信息"""
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if not self.is_initialized or not self.processor:
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return {'error': '服务未初始化'}
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stats = {
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'stationary_count': len(self.get_stationary_persons()),
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'loitering_count': len(self.get_loitering_persons()),
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'config': self.get_config()
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}
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return stats
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# 全局服务实例
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_loitering_service: Optional[LoiteringService] = None
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def get_loitering_service() -> LoiteringService:
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"""获取全局徘徊检测服务实例"""
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global _loitering_service
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if _loitering_service is None:
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_loitering_service = LoiteringService()
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return _loitering_service
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def initialize_loitering_service(**kwargs):
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"""初始化全局徘徊检测服务"""
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service = get_loitering_service()
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service.initialize(**kwargs)
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return service
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