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For the detectors License Plate Recognition plate recognition RR, Vehicle Recognition recognition RR and License Plate Recognition plate recognition RR—Parking, you can set the following parameters in the preview window:

1. The calibration area of ​​the road scene.
To do this
2. Do the following:
   1. Click on the video camera preview window and select Calibration area.
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      The calibration area is configured by moving the
nodal points 
3. 1. anchor points Image Modified. The calibration area is used to match the camera coordinates with the real road scene. The calibration area must also be set in cases where it is necessary to determine the vehicle speed. It is necessary to set an area that corresponds to a certain real rectangle of known dimensions in the frame. For example, road markings, a vehicle,
etc
4. 1. and so on. The calibration area
should
5. 1. must be configured so that it is parallel to the ground surface.
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   2. Specify the dimensions of the real rectangle on the frame. This rectangle corresponds to the area marked in the Calibration area height (m) and Calibration area width (m) parameters.
6. The detection area.
 To do this
7. Do the following:
   1. Click
on
8. 1. the
video
9. 1. camera preview window and
select
10. 1. select Detection area (polyline).
       Image Modified
       The detection area is configured by moving the
nodal points 
11. 1. anchor points Image Modified. The detection area is used to detect vehicles or license plates and generate corresponding events.
       

       Info
       title Note
       For convenience of configuration, you can "freeze" the frame. Click

the 

12. 1. the Image Modified button. To cancel the action, click this button again. To hide the

virtual line

13. 1. area, click the Image Modified button. To cancel the action, click this button again. To delete

a virtual line

14. 1. an area, click

the

15. 1. the Image Modified button.

16. To save the changes, click the Apply Image Modified button. To cancel the changes, click the Cancel Image Modified button.

The configuration of the calibration area and detection area is complete.