AI Zones or Bi-Directional Lines for Media Drive and Live Stream

Customize AI configurations to increase accuracy of visual data capture.

Zone configuration or bi-directional lines or exclusion zones are some of the most used features our customer base. Zonal AI allows the user to select a specific AI model to apply to a zone, whereas Bi-Directional lines act as a virtual line to count the number of objects passing through it. 

There are several new specific features associated with Zonal AI to highlight including: 

• Choose a color that best represents the zone from a palette of 12 different colors.
• Select from a broad range of trigger points on the bounding box (i.e. center, bottom center, bottom left, bottom right, top center, top left, top right) by hovering with the mouse and clicking. 

Fig: Applying Zones

Fig: Applying Bi-directional lines

The following guides you through the steps required to apply Zonal and Bi-Direction lines to your videos:

• Activate your live-stream video by adding a device and start the live-stream.
• Activate your AI models by speaking with your Unleash live account manager.
• In the live stream dashboard, select the AI toggle to activate the AI model in the live stream.

Note: 

• When setting up the zones the device (camera) needs to be live-streaming.
• Zones are configured per device and per AI model.

• Select the device and AI model.
• Select ADD ZONES.

Choose a Zone Type

There are currently three types of zones available to apply to the live video:

• Polygon - designed to identify and count objects within a designated region.
• Bi-directional - designed to count the number of people moving across a designated line in two directions.
• Exclusion Zone - designed to ignore the detection within a designated region.

Polygon Zones

The use of polygon zones suits use cases requiring a larger area or zone that also has an unusual shape.

• Identify objects in created zones.
• For use with various AI models with zones enabled.

• Select Polygon and ADD

• Click on the image to create points and draw out the polygon zone.

• Press ENTER on the keyboard when complete or you can also click on starting points of the Polygon.
• Make adjustments to zones by using corner points to move corners, edge points to scale edges and the white point in the middle to rotate.
  • For precise control when rotating, click and hold the rotation point and move the cursor further away from the point. 
• Click ADD to configure additional zones.
  • Click text to rename zones.
  • Use the BIN icon to delete the zone.
• Click SAVE when finished.
  • Click X, top right, to exit without saving.
  • RESET to return to last saved point.

Polygon Zone Placement

• For reliable results, make sure that the zones do not overlap.
• Objects that are detected outside zones will be identified as 'None' on the CSV output.

Bidirectional Zones

Bidirectional zones are useful for use cases in which the number of movements across a given location is required to be monitored.

• Count objects that are moving across a line and track the direction of the movement.
• For use with Bi-Directional People Counter AI model.

• Select Bi-directional and ADD.

• Use the white point in the middle to rotate, edge points to scale edges and corner points to move corners.

• For precise control when rotating click and hold the rotation point and move the cursor further away from the point. 

Note:

• The edge the arrow is pointing to is the 'EXIT' line and the opposite is the 'ENTER' line. The object will be counted when a specific point of the bounding box crosses the line in the correct direction.
• The direction of the arrow points to 'EXIT' and the bounding box will be counted when the object crosses the 'EXIT' line in this direction.
• The point on the bounding box can be configured however, the default point is the middle of the bottom edge of the bounding box.

• Press ENTER on the keyboard after adjusting the zone. 
• Click ADD to configure additional zones.
  • Click text to rename zones.
  • Use the BIN icon to delete the zone.
  • RESET to return to last saved point.
• Click SAVE when finished.
  • Click X, top right, to exit without saving.
  • RESET to return to last saved point.

Bi-directional Zone Placement

For accurate counts it is important to assign zones:

• Where people will move through the area and also consider how they use the space. 
• Where there are good and consistent detections.

It is also important to refrain from adding zones where people or certain objects can create false positives including:

• Lingering in the scene.
• Moving back and forth across the zone edges.
• Standing in a line.

Use of Tracklets

• Tracklets show where the various objects are detected and tracked over the recorded footage. 
• For the tracklets to be used effectively, the point on the bounding box where the lines are drawn needs to be the same as the Bi-directional AI. 
• Tracklets can help identify where to place the bidirectional zones.

Highlights that there are minimal detections in the gate area as well as showing people lingering on the scene.

There are better detections inside the gate area compared to at or outside the gates.

Highlights the bi-directional line in both direction of people entering or exiting