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Configure the VIT program module

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as follows:

  1. Go to the Hardware tab in the System settings dialog window (1).In the objects tree on the Hardware tab select the VIT object, corresponding to the set VIT program module (2). The settings panel of the selected object will open on the right of the windowmodule object settings panel, which is created on the basis of the LPR Channel object.
    Image Modified
  2. Set the Zooming check box checkbox checked to increase the plate recognizing speed on mega-pixel vedio video cameras without loss of recognizing quality (31).

    Info
    titleNote.

    This check box is relevant when the value of the Zone width parameter is more than 150 pixels (see Setting up the LPR channel detector section). The recognizing speed is increasing:

    • 2 times if the value of the Zone width parameter is more than 150 pixels;
    • 4 times if the value of the Zone width parameter is more than 400 pixels;
    • 8 times if the value of the Zone width parameter is more than 800 pixels.
  3. Set the Consider LP angle checkbox if license plate angle is to be taken into account at recognition (4).
  4. Set the Deeper image analysis checkbox if enhanced algorithm of image analysis is to be used in order to search and recognize a license plate (5).
  5. A threshold for pixel brightness evaluation when converting colored image to black-and-white for analysis can be set in the Binarization threshold of color pixels into black and white field (6).
  6. A similarity level between LP template and analyzed image can be set in the Minimal percentage of similarity between result and template field in percents (7).
  7. Click Apply to save the changes (8).

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  1. If there is frame loss during recognition when mega-pixel video cameras are in use, then the frame loss can be compensated by increasing the maximum number of recognition streams. For this change the value of the Number of streams for frame processing field (2):
    1. If the value of the Number of streams for frame processing field is 0,recognition will be performed in the same stream it was started. It is the default value.

    2. If the value of the Number of streams for frame processing field is 1, recognition will be performed in the parallel stream to the process that starts it. This is the recommended value.

    3. If the value of the Number of streams for frame processing field is 2, recognition will be performed in two streams simultaneously to the process that starts it. But in this case 2 licenses are in use.

Info
titleNote

It is recommended to change the number of streams for frame processing only when 1 recognition stream processes several recognition streams in the parallel mode.


Note
titleImportant!

Do not specify the value that is greater than the number of CPU cores.

5. Perform fine tuning of SDK if required (3, see VIT module object settings panel).

Note
titleImportant!

Fine tuning of SDK is to be performed only with the help of AxxonSoft specialists!


Info
titleNote

To find out the current SDK version, in the Windows command line, run the vpwfetch.exe -v command in the following folder:

for x32: <Auto Intellect installation directory>\Modules\VIT.
for x64: <Auto Intellect installation directory>\Modules64\VIT.

6. Click Apply button (4) to save the changes.

The VIT program module is now configured.

Info
titleNote

It is possible to track the disappearance of the recognized number. If the recognized number disappeared from the camera field of view and was not recognized again within the specified time, the lost number event will be generated. To enable this feature, in the VIT.TimeoutLostNumber parameter, set the time in milliseconds after which the lost number event will be generated (for details, see Registry keys reference guide, for more information about working with the registry, see Working with Windows OS registry).

To ensure the operation of this feature, it is necessary to set the True value for the VodiCTL_VPW_DYNAMIC_ENABLE tweaking parameter (see VIT module object settings panel).


Note
titleAttention!

To ensure the proper operation of the VIT program module, it is necessary to grant the read/write access for the current Windows user to the following catalogues and files:

  • %INTELLECT%\Modules\VIT\
  • %INTELLECT%\Modules64\VIT\
  • С:\ProgramData\VIT\LprPresetDemo\presets.xml