Configure U-turn Filtering

This section describes how to configure the U-turn Filtering function.

The device supports the U-turn filtering function. It eliminates duplicate counting by identifying individuals who do not complete a full entrance/exit transition. You can draw an area for every detection line and the device will analyze movement patterns within the defined areas and registers counts only when a person fully traverses the area.
  • Counting example when U-turn filtering is disabled:
  • Counting example when U-turn filtering is enabled:

    The device automatically filters out wandering individuals in the preview.



  • Counting example when U-turn filtering is enabled and the U-turn area for the detection line is drawn:

    When you care about the timeliness of the statistics, you can draw the U-turn area.


Prerequisite:

A detection line is added in the Line Cross Counting area on the Rule page.

Steps:
  1. In the main page, click Rule from the navigation tree on the left.

  2. In the Line Cross Counting area, enable U-turn Filtering to filter repeated counting.



  3. Click to draw a U-turn area for the detection line in the preview.

  4. (Optional) Draw a U-turn area for the detection line, you can draw up to 4 areas with a maximum of 10 line segments per area:

    1. Left-click to start and drag to draw the first line segment.
    2. Left-click to add vertices and change direction and drag to draw another line segment.
    3. Repeat step b to draw more line segments as needed.
    4. Right-click to finish.
    5. (Optional) Adjust the region by dragging.
    6. (Optional) To redraw an area, click Clear This Area.
    7. Click to save the configuration.
      Note: Ensure the movement trajectory is fully included.
  5. (Optional) To delete a U-turn area, click and click Clear This Area.

  6. To check the visual configuration effect, click Dashboard from the left navigation tree.