Configuring the Object tracker

To configure the Object tracker detector, do the following:

1. Go to the Detectors tab.

2. Below the required camera, click Create… → Category: Trackers → Object tracker.

By default, the detector is enabled and set to detect moving objects in the frame, on the basis of which their tracks are created.

Some parameters are set for all sub-detectors of the Object tracker simultaneously.

If necessary, you can change the detector parameters. The list of parameters is given in the table:

By default, the entire frame is a detection area. If necessary, in the preview window, set:

• one or more detection areas (see Configuring a detection area),
• one or more ignore areas (see Configuring the ignore area).
• visual size of objects (the No value is selected in the Object calibration parameter):
  • Click the min button in the preview window. A rectangular area appears in the frame. Drag the anchor points to adjust the area to the minimum object size. The values update automatically in the Min. object height and Min. object width parameters.
    
  • Click the max button in the preview window. A rectangular area appears in the frame. Drag the anchor points to adjust the area to the maximum object size. The values update automatically in the Max. object height and Max. object width parameters.
    
• leveling rods (the Yes value is selected in the Object calibration parameter. The height of an object in decimeters is specified in the Leveling rod height parameter):
  1. Click the button in the preview window.
  2. In the window, click the mouse button.
  3. From the list, select Leveling rod position.
  4. Click the button in the preview window.
  5. Specify visually the dimensions of the same object in different parts of the frame. To ensure accurate calibration, the following conditions must be met:
     1. The leveling rod is set precisely according to a reference object (for example, the height of a person) standing in a given place in the scene.
        
     2. You set at least three leveling rods in the frame.
     3. All bottom points (bases) of the leveling rods are on the same physical plane (for example, the floor).
     4. The bottom anchor points of any three leveling rods aren't positioned on the same line (horizontal, vertical, inclined, and so on).
     5. Leveling rods are evenly distributed across the entire frame, covering the areas where objects are expected to appear. The larger the coverage area, the higher the accuracy.
     6. Objects located at the same distance from the camera are marked in the frame with leveling rods of the same height.
     7. For simple scenes, 3-5 leveling rods are set. For complex scenes with deep perspective, we recommend setting up to 10-15 leveling rods.
        
        To create one leveling rod, add two anchor points by left-clicking in the frame:
        
        • The first point is the base of an object (for example, a person's feet).
        • The second point is the top of an object (for example, the top of a person's head).
          

          Note

          • To stop the video, click the button . Click this button again to resume playback.
          • To hide detection and/or ignore areas, click the button . Click this button again to display the areas.
          • To resize a leveling rod, click and hold down the anchor point and drag it in the required direction.
          • You can move the leveling rod by drag-and-dropping it.
          • To delete a created leveling rod or area, click the button.

To save the parameters of the detector, click the Apply  button. To cancel the changes, click the Cancel  button.

Configuration of the Object tracker detector is complete. If necessary, you can create and configure the necessary sub-detectors on the basis of the Object tracker (see Abandoned object, Standard sub-detectors). General parameters are set for all its sub-detectors.