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# Detect and Read Number Plates

HPE Media Server can detect and read number plates that appear in video.

To detect and read number plates in video

1. Create a new configuration to send to HPE Media Server with the `process` action, or open an existing configuration that you want to modify.

2. In the `[Analysis]` section, add a new analysis task by setting the `AnalysisEngineN` parameter. You can give the task any name, for example:

       [Analysis]
       AnalysisEngine0=ANPR

3. Create a new section in the configuration file to contain the task settings and set the following parameters:

   `Type` | The analysis engine to use. Set this parameter to `numberplate`.
   `Input` | (Optional) The image track to process. If you do not specify an input track, HPE Media Server processes the first track of the correct type that is produced by the ingest engine.
   `Location` | The location in which you are reading number plates. There are significant differences in the number plates used by countries and states, so this parameter is necessary to read the plates successfully.
   `Region` | (Optional) The region of interest (ROI) to monitor for number plates (left, top, width, height). If you do not specify a region, HPE Media Server detects and reads number plates anywhere in the scene.
   `RegionUnit` | (Optional) The units used to specify the position and size of the region of interest (`pixel` or `percent`).
   `Sensitivity` | (Optional) The confidence level required to detect a number plate.
   `Integration` | (Optional) The method to use to combine the number plates read from successive frames into a single result (`none`, `moving`, or `static`).
   `MinValidScore` | (Optional) The average character score required for a number plate to be recognized.

   For example:

       [ANPR]
       Type=numberplate
       Location=uk
       RegionUnit=percent
       Region=20,10,60,90
       Sensitivity=14
       Integration=moving

   For more information about the parameters that customize number plate recognition, refer to the HPE Media Server Reference.

4. Save and close the configuration file. HPE recommends that you save your configuration files in the location specified by the `ConfigDirectory` parameter.

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