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By default, the Сlose-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  in button in the preview window.

2. Set the size of the same object in different areas of the field of view.  To To create a calibration lengthleveling rod, left-click within on the video image in the viewing tile and add  add two anchor points.  Set Set at least three calibration lengths. You 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 length rod by stretching its anchor points . You can move it on screen by dragging and dropping.
   

   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 Leveling rods should: not be located on the same line; 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 have different height .

   
   

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

   
   

   Info
   title Note
   To delete itthe rod, click the the  button.

   
   

3. Enter In the Distance sensitivity field (1) enter a triggering distance value (1) in meters into the Distance Sensitivity fieldbetween people. The detection tool will trigger if the current distance between people in the frame becomes equal or less than this the specified value.
   

4. Enter the height In the Leveling rod length field (2) enter the average height of the person (in meters) of the leveling rod into the Leveling Rod Height field (2), 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].