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Stopped object detection

Stopped object detection is a Search that detects objects that have stopped moving for a specified amount of time. The Search can be configured to detect specific object types and filter results based on various parameters.

  • Go to Video Search Advanced Search to set up a Search for stopped objects.

  • Go to Live Rules New Rule to set up a real-time detection of stopped objects with alarm integration.

Select Source

Select the video you want to run the Search on from the left sidebar. The thumbnail image of the chosen video is displayed here.

Time interval Advanced Search only

Time interval

Select a time frame for the analytics to run.

  • Entire video: Run the Search on the entire video duration, from the start timestamp to the end timestamp (set during video registration).
  • Custom range: You can select a custom start and end date and time to run the Search on. Type the desired date and time or select them by clicking the calendar icon.

Object Filter

Object filter

Select one or multiple object types you want to search for.

Expert Settings

Ticking the Expert Settings box will open additional configuration options for the Search, such as more object types to choose from. Additional parameters:

  • Sensitivity (Medium by default): The sensitivity level of the Search. The higher the sensitivity, the more likely it is to detect objects, but it may also result in more false positives.

  • Personalized AI: Some object types may have additional attributes available for filtering, such as helmet and gender for Person objects. You can select any number of them to further filter your results; For instance, adding the nohelmet attribute to Person objects will filter detections so that only people not wearing helmets will show up in the Search results.

  • Combination mode: Select whether the Search will return results that match all or any of the attributes chosen above.

Algorithm

  • Detection zone: Draw a polygon on the video frame to define the area where the objects will be detected. Left-click on the video frame to draw a polygon. Left-click again on the video frame to keep adding points to the polygon; double-click to finish drawing.

Drawing ROI is only supported on videos with a fixed camera angle (i.e. not on moving cameras). PTZ cameras are supported only in fixed position.

Note that currently only one ROI can be drawn.

  • Minimum stationary time (in seconds, 2 by default): The minimum duration for an object to be considered stopped. The higher the stationary time, the more time the object must remain still before being detected as stopped.

  • Movement tolerance (in pixels, 70 by default): The maximum amount of pixels an object can change to be considered as stopped. If the object moves more than this amount, it will not be considered stopped. Lowering this value will make the Search more sensitive to small movements, and vice versa.

Alarm integration Live Rules only

You can choose to integrate the Search with an alarm system.; whenever a stopped object is detected, an alarm will be triggered in the integrated system.

Results

All done - Clicking Search will immediately start the analysis and opens the Search Results screen.

Live Rules will produce real-time detections , and the results will be displayed in the Alarms screen. If an alarm integration is set up, an alarm will also be triggered in the integrated system.