Setting up the LPR channel detector

The main parameters, forming the operation of LPR channel detector are the following:

1. Search threshold – sets the detector's sensitivity (the more parameter's value the less sensitivity).
2. Maximum width – the maximum allowed width of LP number (is set in percent of the general frame).
3. Maximum height – the maximum allowed height of LP number (is set in percent of the general frame).
4. Minimal width – the minimal allowed width of LP number (is set in percent of the general frame).
5. Minimal height – the minimal allowed height of LP number (is set in percent of the general frame).

The maximum sizes are not to be set more than required because it slows down the processing and does not improve the quality of recognizing.

To set up the detector parameters, do the following:

1. In the System Settings dialog window, open the Hardware tab (1).
2. In the object tree on the left side of the Hardware tab (2). The settings panel of the selected object will open on the right side of the window.
   
3. Enter the value in the Search threshold field (3).

4. Set the Max. width and Max. height parameters:
   4.1 Click the X button next to the parameters. Interactive interface of setting up the zone parameters (4) showing the image from the corresponding camera will download.
   
   4.2 At the appropriate moment, click the Stop video button and then hold the mouse while dragging it across the required area and click OK button.
   

   Note.

   You can select the zone in the Real Time Video mode as well (see The Traffic Monitor setup procedure section). 

   Results of setting the parameters will be automatically entered in the Max. width and Max. height fields.

   
   

5. Set the Min. width and Min. height parameters by analogy with Max. width and Max. height parameters – see item 4 (5).

6. If necessary set the Ignore unrecognized LPs checkbox (6).

   Note.

   You can set unrecognized license plates ignoring when using CARMEN-Auto, ARH-Containers and VIT program modules.

7. If necessary set the Cut area with car checkbox (7).

   Note.

   Setting up the frame with a car cut is used only in case of working with megapixel video surveillance cameras.

   Note.

   Setting up the frame with a car cut is available also with the use of VIT program module.

8. Click Apply button (8).

The LPR channel settings are now completed.