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ANPR is a detection tool that reads license/number plates of vehicles in FoV.

To configure ANPR, do as follows:

1. Download ANPR (VT) from the website and install it. 
2. Create the Select the License plate recognition (VT) object (1) and select it.
   

3. If you require using need to use this detection tool for real-time number license plate recognition, set the corresponding parameter to Yes (2)(see Configuring real-time vehicle license plate recognition), set the corresponding parameter to Yes (2).

4. If you need to enable recording of metadata to the database, select select Yes from the Record objects tracking list (3).
5. If a the camera supports multistreaming, select the stream for which detection is needed. Selecting a low-quality video stream allows reducing the load on the Server (4).

6. Select detection tool working mode: standard or neural (1). 

   Image Modified

7. In the appropriate fields, select one or more countries for ANPR (2).

   Note
   title ImportantAttention!
   The more countries you select, the slower the recognition works and the greater the likelihood of the recognition error. To recognize the old USSR license plates, you need to select the corresponding country in the list.

   
   

8. Select a processing resource for decoding video streams (3) (see Hardware requirements for GPU based video decoding). When you select a GPU, a stand-alone graphics card takes priority (when decoding with NVidia NVIDIA NVDEC chips). If there 's is no appropriate GPU, the decoding will use the Intel Quick Sync Video technology. Otherwise, CPU resources will be used for decoding.

9. Analyzed framed are scaled down to a specified resolution (4, 1920 pixels on the longer side). This is how it works:

   1. If the longer side of the source image exceeds the value specified in the Frame size change field, it is divided by two.

   2. If the resulting resolution falls below the specified value, it is used further.

   3. If the resulting resolution still exceeds the specified limit, it is divided by two, etc.

      Info
      title Note
      For example, the source image resolution is 2048*1536, and the limit specified value is set to 1000. In this case, the source resolution will be divided  halved two times (down to 512*384) : , as after the first division, the number of pixels on the longer side exceeds the limit (1024 > 1000). If detection is performed on a higher resolution stream and detection errors occur, it is recommended to reduce the compression.

      
      

   
   

10. Select the current license type (5).

    License	Description
    Search in archive	Basic ANPR Search License. Attention! This type of license provides a 30-sec delay between the number recognition and the corresponding event

    .

    (see Vehicle number plate recognition and search).
    Standard (25 FPS or 6 FPS)	The 25 FPS license has a priority. The 6 FPS license is used only if you don't have

    no

    25 FPS license. You cannot use the

    number

    license plate recognition function if you have

    no FPS

    not purchased both licenses

    purchased

    .
    Fast speed (25 FPS)	The "Fast" license allows you to process video feeds up to 25

    fps

    FPS with a maximum vehicle speed of 150 km/h. You

    have to obtain an appropriate license to make ANPR work.

    cannot use the license plate recognition function if you have not purchased the license.

    Slow speed (6 FPS)

    6 FPS

    The "Slow" license allows you to process video feeds up to 6

    fps

    FPS with a maximum vehicle speed of 20 km/h. You

    have to obtain an appropriate license to make ANPR work

    cannot use the license plate recognition function if you have not purchased the license.

    
    

    Note
    title ImportantAttention!
    All license types except the standard one (Search in archive) require the hardware key or the software key activation (see Licensing of the software module for License plate recognition (VT)). On a virtual machine, you may You can use a 60-day trial key (see Licensing of the software module for License plate recognition (VT)).
    Note
    title Important
    You can use only a hardware key on virtual machines. To use a hardware key, select the Standard (25 FPS or 6 FPS) license type.

    
    

11. Set the maximum and minimum width of the vehicle number license plate as a percentage of the FoV width FOV width (6, 7).

    Note
    title ImportantAttention!
    The Minimum LP width parameter affects the CPU load as follows: the higher the parameter is, the higher the load.

    
    

12. Choose a processor to run detection on (8, see Hardware requirements for License plate recognition (VT), General Information on Configuring Detection). In standard mode, detection runs on the CPU only. In neural network analysis mode, the algorithm runs on the NVIDIA GPU.

13. Set the number of frames required for LPR/ANPR (9). This is though a necessary condition, but it is not sufficient for the first output. This condition delays the LPR output. This parameter allows to increase increasing the reliability of the results, as well as to hide hiding false positives.

14. If necessary, configure the advanced detection settings (see Fine-tuning the VT number plate detection tool).

15. You can configure an the ANPR zone area in FOV. The zone area is resized by moving the anchor points.
    

    info

    Info
    title Note
    For For your convenience, you can click the  the Image Modified button and configure the mask on a still frame /snapshot . To undo, click this button again.
    title Note
    Detection zone area is displayed by default. You can click the  the Image Modified  button button to hide the zone area. To undo, click this button again.

    
    

16. Click the Apply button.

Configuration of ANPR is now complete.