📍 Detection Zones

Limit detection area with polygonal zones for precise monitoring and fewer false positives.

🗺️ Polygon Zones

Polygon Zones allow you to limit detection to arbitrary shapes. Events are only detected inside drawn zones.

Zone Management

Control zones through interface buttons:

  • DRAW ZONE — start drawing new zone
  • CLOSE ZONE — finish and save zone
  • REMOVE LAST — delete last zone
  • RESET — clear all zones

How it works

Zone creation algorithm:

  • Click DRAW ZONE
  • Click points on the image
  • Click CLOSE ZONE to close polygon
  • Zone saves automatically to config
Zones are saved in camera configuration. After creation, zones can be edited or deleted without restarting the system.

💼 Workplace Zones

Workplace Zones are special zones for monitoring employee presence. Each zone maintains its own incident counter.

Differences from Polygon Zones

Workplace Zones have additional logic:

  • Absence alert — notification after N seconds absent
  • Presence confirm — confirm return after M seconds
  • Require initial presence — require initial appearance
  • Per-zone incidents — separate incidents for each zone

Example Usage

Typical office scenario:

  • Zone around workstation
  • Alert after 30 sec absence
  • Return confirmation after 5 sec
  • Telegram notifications for absence/return
Configuration Example:

{
"workplace_enabled": true,
"workplace_absence_seconds": 30,
"workplace_confirm_seconds": 5,
"workplace_zones": [
  [[50, 50], [300, 50], [300, 400], [50, 400]]
]
}

⚙️ Configuration

Polygon Zones Parameters

  • zones — list of polygons, each is array of points [x, y]
  • classes — object classes to detect in zone
  • confidence — confidence threshold (default 0.45)

Workplace Zones Parameters

  • workplace_enabled — enable workplace monitoring
  • workplace_absence_seconds — absence time before alert (default 30)
  • workplace_confirm_seconds — time to confirm return (default 5)
  • workplace_zones — list of workplace zones