To detect a recumbent pose, you should configure the frame perspective first. 

To do this, do the following:

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

2. Set the size of the same person in different areas of the FOV. To create a leveling rod, left-click on the video image to add two anchor points. You should 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 . You can move it on screen by dragging and dropping.
   

   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).

   
   

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

   
   

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

   
   

   To delete the rod, click the button.

   
   

3. Click the Apply button.

Configuring the Man down detection tool is complete.