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By default, the Сlose-

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standing people detection tool triggers when "skeleton" bounding boxes around individuals collide. 

You can set another triggering distance by adjusting frame perspective:

1. Select a detection tool, and click the Image Removed Image Added button in the preview window.

2. Set the size of the same object in different areas of the field of view. To create a leveling rod, left-click on the video image and add two anchor points. Set at least three leveling rods. The size of the leveling rod should be about the average height of a person at this point in the frame. You can resize the rod by stretching its anchor points Image RemovedImage Added. You can move it on screen by dragging and dropping.
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   Note
   title Attention!
   When setting up the leveling rods, the following conditions should be met: the rods that are located at the same distance from the video camera lens, should be of the same size; the feet of the rods should be located on the same surface (e.g. floor); in complex scenes, it is recommended to add more than three rods to increase the accuracy of the detection; in the parts of the frame where the lens vertical distortion is observed, the rods should be parallel to the nearest vertical objects (e.g. door, wardrobe).

   
   

   Note
   title Attention!
   For portrait-oriented scenes (such as corridor, shopping aisle, warehouse aisle, etc.), the arrangement of the rods should form triangles.

   
   

   Info
   title Note
   For your convenience, you can click the Image Removed the Image Added button and configure the mask on a still frame. To undo, click this button again.

   
   

   Info
   title Note
   To delete the rod, click the Image Removed button Image Added button.

   
   

3. In the Distance sensitivity field (1) enter a triggering distance value in meters between people. The detection tool will trigger if the distance between people in the frame becomes equal or less than the specified value. The value should be in the range [0; 100].
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4. In the Leveling rod length field (2) enter the average height of the person (in meters), according to which the leveling rods are set. The value should be in the range [0, ; 3].

5. Set the minimum number of frames in which the detection tool should detect close-standing people in order to trigger (3). The value should be in the range [2; 20].