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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. Go to the settings panel of the LPR channel object corresponding to the activated software module (see Activating the program module, used for identifying the plates).
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   Info
   title Note
   Parameters availability depends on activated software modules (for details, see The LPR channel object settings panel).

   
   

2. Enter the value in the Area search threshold field (1).

3. Set the Max. width and Max. height parameters:4.1

   1. Click the Image Modified (2) button next to the parameters. Interactive interface of setting up the zone parameters showing the image from the corresponding camera will be displayed.
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   4.2

   1. 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.

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      Info
      title Note.
      You can select the zone in the Real Time Video mode as well.

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

      Info
      title Note
      It is not recommended to set maximum sizes greater than required, as this slows down the processing, but does not improve the quality of recognition.

      
      

4. Set the Min. width and Min. height parameters by analogy with Max. width and Max. height parameters using the  button (3).

5. f If necessary set the Cut image with vehicle checkbox (4).

   Info
   title Note.
   Setting up the frame with a car cut The Cut image with vehicle option is used only in case of when working with megapixel video surveillance cameras.
   Info
   title Note.
   Setting up the frame with a car cut is available also with the use of VIT program module.

   
   

6. Click Apply button (5).

The LPR channel settings are now completed.