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The Perspective configuration enhances detection tools the performance and helps evaluate real sizes of the detectors and allows you to estimate the real size of objects based on a simplified calibration system.

To configure the perspective, do the following:

1. Select the Object tracker.

2. In the
Object tracker object and
3. settings of the Object tracker (see Configuring the Object tracker):
   1. Select the Yes value for the Object calibration parameter.
   2. In the Leveling rod height parameter, enter the height of the calibration object on the video image in decimeters.
4. In the preview window, click the Image Modified button.
Set
5. Visually specify the size of the same object in different
areas
6. parts of the
field of view.
7. frame:

   • To create a

calibration length,

8. • leveling rod, add two anchor points by left-

click within

9. • clicking the video image

in the viewing tile and add two anchor points.

10. • . 

    • Set at least

three calibration lengths.

11. • three leveling rods. The lower anchor points of any three rods must not be located on the same line (horizontal, vertical, slanting, and so on).

    • You can resize the

length

12. • rod by stretching its anchor points Image Modified

. You can

13. • , and move it on screen

by dragging and dropping.
Image Removed

14. • using drag-and-drop.

    • Rods must be exactly the same size as the object, which serves as a template for a leveling rod. For example, a person's height can serve as a template:
      Image Added

      Note
      title Attention!
      When you configure leveling rods, the following requirements must be met: rods must be evenly distributed throughout the frame: the larger area they cover, the more accurate the calibration; rods that are equally distant from the camera lens must be the same size; all bases of the rods must be on the same plane (for example, floor); in complex scenes, we recommend adding more than three rods, but no more than 10-15 rods per frame.

      Info
      title Note

 For your

15. • For convenience of configuration, you can

click

16. • "freeze" the frame. Click the Image Modified button

and configure the mask on a still frame/snapshot

17. • . To

undo

18. • cancel the action, click this button again.

InfotitleNote

19. • To delete

it

20. • a rod, click the Image Modified button.

21. Select Yes in the Object calibration option (1).
    Image Removed

Enter the height in decimeters of the object you want to find in the Leveling rod height field (2).

Note
title Attention!
Objects smaller than the specified value will not be detected.

Click the Apply
22. Click the Apply button Image Added. To cancel the changes, click the Cancel Image Added button.

Perspective is now configured.

...

These settings will apply for all

...

sub-detectors of the Object tracker.