refactor:使用状态机优化离岗检测逻辑，并移除排序相关算法
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@@ -1,5 +1,6 @@
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import os
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import sys
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from collections import deque
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from datetime import datetime, timedelta
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from typing import Any, Dict, List, Optional, Tuple
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@@ -8,28 +9,41 @@ import numpy as np
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from sort import Sort
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class LeavePostAlgorithm:
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STATE_INIT = "INIT_STATE"
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STATE_ON_DUTY_CONFIRMING = "ON_DUTY_CONFIRMING"
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STATE_ON_DUTY = "ON_DUTY"
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STATE_OFF_DUTY_CONFIRMING = "OFF_DUTY_CONFIRMING"
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STATE_OFF_DUTY_COUNTDOWN = "OFF_DUTY_COUNTDOWN"
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STATE_NON_WORK_TIME = "NON_WORK_TIME"
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def __init__(
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self,
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threshold_sec: int = 360,
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confirm_sec: int = 30,
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return_sec: int = 5,
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working_hours: Optional[List[Dict]] = None,
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roi_polygon: Optional[List[Tuple[float, float]]] = None,
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):
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self.threshold_sec = threshold_sec
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self.confirm_sec = confirm_sec
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self.return_sec = return_sec
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self.working_hours = working_hours or []
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self.track_states: Dict[str, Dict[str, Any]] = {}
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self.tracker = Sort(max_age=10, min_hits=2, iou_threshold=0.3)
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self.roi_polygon = roi_polygon
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self.alert_cooldowns: Dict[str, datetime] = {}
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self.cooldown_seconds = 300
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self.state: str = self.STATE_INIT
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self.state_start_time: Optional[datetime] = None
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self.initial_state_start_time: Optional[datetime] = None
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self.has_ever_seen_person: bool = False
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self.on_duty_window = deque()
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self.alarm_sent: bool = False
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self.last_person_seen_time: Optional[datetime] = None
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self.on_duty_start_time: Optional[datetime] = None
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def is_in_working_hours(self, dt: Optional[datetime] = None) -> bool:
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if not self.working_hours:
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return True
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@@ -45,90 +59,160 @@ class LeavePostAlgorithm:
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return False
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def is_point_in_roi(self, x: float, y: float) -> bool:
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if not self.roi_polygon or len(self.roi_polygon) < 3:
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return False
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from shapely.geometry import Point, Polygon
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point = Point(x, y)
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polygon = Polygon(self.roi_polygon)
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return polygon.contains(point)
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def check_roi_has_person(self, detections: List[Dict]) -> bool:
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for det in detections:
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bbox = det.get("bbox", [])
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if len(bbox) >= 4:
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x1, y1, x2, y2 = bbox[:4]
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center_x = (x1 + x2) / 2
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center_y = (y1 + y2) / 2
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if self.is_point_in_roi(center_x, center_y):
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return True
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return False
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def process(
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self,
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camera_id: str,
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tracks: List[Dict],
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current_time: Optional[datetime] = None,
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) -> List[Dict]:
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if not self.is_in_working_hours(current_time):
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return []
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if not tracks:
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return []
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detections = []
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for track in tracks:
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bbox = track.get("bbox", [])
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if len(bbox) >= 4:
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detections.append(bbox + [track.get("conf", 0.0)])
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if not detections:
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return []
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detections = np.array(detections)
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tracked = self.tracker.update(detections)
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alerts = []
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current_time = current_time or datetime.now()
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for track_data in tracked:
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x1, y1, x2, y2, track_id = track_data
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track_id = str(int(track_id))
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roi_has_person = self.check_roi_has_person(tracks)
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in_work = self.is_in_working_hours(current_time)
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alerts = []
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if track_id not in self.track_states:
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self.track_states[track_id] = {
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"first_seen": current_time,
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"last_seen": current_time,
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"off_duty_start": None,
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"alerted": False,
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"last_position": (x1, y1, x2, y2),
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}
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if not in_work:
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self.state = self.STATE_NON_WORK_TIME
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self.on_duty_start_time = None
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self.last_person_seen_time = None
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self.initial_state_start_time = None
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self.has_ever_seen_person = False
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self.on_duty_window.clear()
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self.alarm_sent = False
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roi_has_person = False
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else:
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if self.state == self.STATE_NON_WORK_TIME:
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self.state = self.STATE_INIT
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self.initial_state_start_time = current_time
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self.has_ever_seen_person = False
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self.on_duty_window.clear()
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self.alarm_sent = False
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state = self.track_states[track_id]
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state["last_seen"] = current_time
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state["last_position"] = (x1, y1, x2, y2)
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if self.state == self.STATE_INIT:
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self.initial_state_start_time = current_time
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self.has_ever_seen_person = False
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self.alarm_sent = False
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if state["off_duty_start"] is None:
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off_duty_duration = (current_time - state["first_seen"]).total_seconds()
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if off_duty_duration > self.confirm_sec:
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state["off_duty_start"] = current_time
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else:
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elapsed = (current_time - state["off_duty_start"]).total_seconds()
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if elapsed > self.threshold_sec:
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if not state["alerted"]:
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cooldown_key = f"{camera_id}_{track_id}"
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now = datetime.now()
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if cooldown_key not in self.alert_cooldowns or (
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now - self.alert_cooldowns[cooldown_key]
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).total_seconds() > self.cooldown_seconds:
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alerts.append({
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"track_id": track_id,
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"bbox": [x1, y1, x2, y2],
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"off_duty_duration": elapsed,
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"alert_type": "leave_post",
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"message": f"离岗超过 {int(elapsed / 60)} 分钟",
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})
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state["alerted"] = True
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self.alert_cooldowns[cooldown_key] = now
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if roi_has_person:
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self.state = self.STATE_ON_DUTY_CONFIRMING
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self.state_start_time = current_time
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self.on_duty_window.clear()
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self.on_duty_window.append((current_time, True))
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self.has_ever_seen_person = True
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else:
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if elapsed < self.return_sec:
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state["off_duty_start"] = None
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state["alerted"] = False
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elapsed = (current_time - self.initial_state_start_time).total_seconds()
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if elapsed >= self.threshold_sec:
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self.state = self.STATE_OFF_DUTY_COUNTDOWN
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self.state_start_time = current_time
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self.alarm_sent = False
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cleanup_time = current_time - timedelta(minutes=5)
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for track_id, state in list(self.track_states.items()):
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if state["last_seen"] < cleanup_time:
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del self.track_states[track_id]
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elif self.state == self.STATE_ON_DUTY_CONFIRMING:
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self.on_duty_window.append((current_time, roi_has_person))
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while self.on_duty_window and (current_time - self.on_duty_window[0][0]).total_seconds() > self.confirm_sec:
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self.on_duty_window.popleft()
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hit_ratio = sum(1 for t, detected in self.on_duty_window if detected) / max(len(self.on_duty_window), 1)
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if hit_ratio >= 0.75 and (current_time - self.state_start_time).total_seconds() >= self.confirm_sec:
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self.state = self.STATE_ON_DUTY
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self.on_duty_start_time = None
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self.last_person_seen_time = current_time
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elif not roi_has_person and (current_time - self.state_start_time).total_seconds() > self.confirm_sec:
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self.state = self.STATE_INIT
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self.initial_state_start_time = current_time
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elif self.state == self.STATE_ON_DUTY:
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if roi_has_person:
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self.last_person_seen_time = current_time
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else:
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self.state = self.STATE_OFF_DUTY_CONFIRMING
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self.state_start_time = current_time
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elif self.state == self.STATE_OFF_DUTY_CONFIRMING:
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if roi_has_person:
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self.state = self.STATE_ON_DUTY
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self.state_start_time = current_time
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self.last_person_seen_time = current_time
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elif (current_time - self.state_start_time).total_seconds() >= self.return_sec:
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self.state = self.STATE_OFF_DUTY_COUNTDOWN
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self.state_start_time = current_time
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self.alarm_sent = False
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elif self.state == self.STATE_OFF_DUTY_COUNTDOWN:
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if roi_has_person:
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self.state = self.STATE_ON_DUTY_CONFIRMING
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self.state_start_time = current_time
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self.on_duty_window.clear()
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self.on_duty_window.append((current_time, True))
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elif (current_time - self.state_start_time).total_seconds() >= self.threshold_sec:
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if not self.alarm_sent:
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cooldown_key = f"{camera_id}"
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if cooldown_key not in self.alert_cooldowns or (
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current_time - self.alert_cooldowns[cooldown_key]
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).total_seconds() > self.cooldown_seconds:
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bbox = self.get_latest_bbox(tracks)
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elapsed_minutes = int((current_time - self.state_start_time).total_seconds() / 60)
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alerts.append({
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"track_id": camera_id,
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"bbox": bbox,
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"off_duty_duration": (current_time - self.state_start_time).total_seconds(),
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"alert_type": "leave_post",
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"message": f"离岗超过 {elapsed_minutes} 分钟",
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})
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self.alarm_sent = True
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self.alert_cooldowns[cooldown_key] = current_time
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return alerts
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def get_latest_bbox(self, tracks: List[Dict]) -> List[float]:
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for det in tracks:
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bbox = det.get("bbox", [])
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if len(bbox) >= 4:
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x1, y1, x2, y2 = bbox[:4]
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center_x = (x1 + x2) / 2
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center_y = (y1 + y2) / 2
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if self.is_point_in_roi(center_x, center_y):
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return bbox
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if tracks:
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return tracks[0].get("bbox", [])
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return []
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def reset(self):
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self.track_states.clear()
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self.state = self.STATE_INIT
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self.state_start_time = None
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self.initial_state_start_time = None
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self.has_ever_seen_person = False
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self.on_duty_window.clear()
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self.alarm_sent = False
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self.last_person_seen_time = None
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self.on_duty_start_time = None
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self.alert_cooldowns.clear()
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def get_state(self, track_id: str) -> Optional[Dict[str, Any]]:
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return self.track_states.get(track_id)
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return {
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"state": self.state,
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"alarm_sent": self.alarm_sent,
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"has_ever_seen_person": self.has_ever_seen_person,
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}
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class IntrusionAlgorithm:
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@@ -297,7 +381,13 @@ class AlgorithmManager:
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status = {}
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if roi_id in self.algorithms:
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for algo_type, algo in self.algorithms[roi_id].items():
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status[algo_type] = {
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"track_count": len(getattr(algo, "track_states", {})),
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}
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if algo_type == "leave_post":
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status[algo_type] = {
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"state": getattr(algo, "state", "INIT_STATE"),
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"alarm_sent": getattr(algo, "alarm_sent", False),
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}
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else:
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status[algo_type] = {
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"track_count": len(getattr(algo, "track_states", {})),
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}
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return status
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