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Starting with DetectorPack 3.10, a utility was added to the VT LPR add-on (see Installing DetectorPack add-ons), which allows you to create GPU neural network caches without using Axxon One. The presence of the cache speeds up the initialization and optimizes video memory consumption.

To optimize the operation of the License Plate Recognition VT on GPU, do the following:

1. Stop the Server (see Shutting down a Server).
   

   Note
   title Attention!
   If the system has the software running on GPU, it is necessary to stop its operation.

2. Login as ngp superuser:

   1. In the command prompt, run the command:

      Code Block
      language bash
      sudo su ngp

   2. Enter the password for the root superuser.

3. Create a folder with a custom name to store the cache. For example:

   Code Block
   language bash
   mkdir /opt/AxxonSoft/AxxonOne/gpucache

4. Change folder permissions:

   Code Block
   language bash
   chmod -R 777 /opt/AxxonSoft/AxxonOne/gpucache

5. Create the GPU_CACHE_DIR system variable:

   1. Go to the /opt/AxxonSoft/AxxonOne/ folder:

      Code Block
      language bash
      cd /opt/AxxonSoft/AxxonOne

   2. Open the instance.conf file for editing:

      Code Block
      language bash
      nano instance.conf

   3. Add the following line to the file:

      Code Block
      language bash
      export GPU_CACHE_DIR="/opt/AxxonSoft/AxxonOne/gpucache"

   4. Save the file using the Ctrl+O keyboard shortcut.

   5. Exit file editing mode using the Ctrl+X keyboard shortcut.

   6. Run the following command in the terminal:

      Code Block
      language bash
      export GPU_CACHE_DIR="/opt/AxxonSoft/AxxonOne/gpucache"

6. Go to the /opt/AxxonSoft/DetectorPack/ folder:

   Code Block
   language bash
   cd /opt/AxxonSoft/DetectorPack

7. Run the following command:

   Code Block
   language bash
   ./VTGpuCacheGenerator

8. Enter the required countries in alphabetic form.
   

   Expand
   title Expand the list of countries
   ad (Andorra) al (Albania) am (Armenia) ar (Argentina) at (Austria) au (Australia) az (Azerbaijan) ba (Bosnia and Herzegovina) be (Belgium) bg Bulgaria bh (Bahrain) bn (Brunei) bo (Bolivia) br (Brazil) bw (Botswana) by (Belarus) ca (Canada) ch (Switzerland) cl (Chile) co (Colombia) cz (Czech Republic) de (Germany) dk (Denmark) dz (Algeria) ec (Ecuador) ee (Estonia) es (Spain) fi (Finland) fr (France) gb (Great Britain) ge (Georgia) gr (Greece) gt (Guatemala) hk (Hong Kong) hn (Honduras) hr (Croatia) hu (Hungary) id (Indonesia) il (Israel) in (India) ir (Iran) it (Italy) jo (Jordan) ke (Kenya) kg (Kyrgyzstan) kr (Republic of Korea) kz (Kazakhstan) li (Liechtenstein) lk (Sri Lanka) lt (Lithuania) lu (Luxembourg) lv (Latvia) mc (Monaco) md (Moldavia) me (Montenegro) mn (Mongolia) mt (Malta) mx (Mexico) my (Malaysia) ng (Nigeria) ni (Nicaragua) nl (Netherlands) no (Norway) nz (New Zealand) pa (Panama) pe (Peru) ph (Philippines) pl (Poland) pt (Portugal) py (Paraguay) ro (Romania) rs (Serbia) ru (Russia) se (Sweden) sg (Singapore) si (Slovenia) sk (Slovakia) su (USSR) sv (El Salvador) tj (Tajikistan) tm (Turkmenistan) tn (Tunisia) tr (Turkey) tw (Taiwan) ua (Ukraine) us (USA) uy (Uruguay) uz (Uzbekistan) vn (Vietnam) za (Republic of South Africa) zm (Jamaica)

9. After you selected all required countries, enter done.
10. The default resolution is 1920x1080 pixels. If you want to change the resolution, enter y and the required resolution. For example, 2048.
11. To leave the default value, enter n.
    
12. Specify the minimum width of the license plate according to the actual size of the license plate in the frame as a percentage. The minimum allowed value is 0, the maximum value is 100.
    
13. Specify the ID of the required GPU (see Selecting Nvidia GPU when configuring detection tools).
14. Press Enter.

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