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Metadata is information that describes object-related content in the camera FOV.

In Axxon One, metadata can be obtained in two ways:

1. By analyzing video stream on Server by detection tools.
2. By receiving metadata from camera built-in analytics (see Embedded Detection Tools). 

The following tools are used for the Server-side analysis and metadata generation:

1. Object Tracker.

2. Neural Tracker.

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   Object tracker and Neural Tracker generate metadata containing the following information about moving objects in FOV: object type, position, size and color, motion speed and direction, etc.

   
   

3. VMD.

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   VMD generates less accurate data. It does not detect object type and color.

   
   

4. Face detection tools.

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   Face detection metadata contains face bounding boxes and their positions, as well as face vectors.

   
   

5. Automatic Number Plate Recognition (LPR/ANPR) tools.

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   ANPR metadata contains license plate bounding boxes and their positions, as well as vehicle registration numbers.

   
   

6. Pose detection.

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   Metadata from pose detection tools contains information on positions and pose (skeleton) of all people in FOV.

   
   

7. Personal protective equipment detection tools.

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   Equipment detection metadata contains information about the position of all the people in FOV.

   
   

The metadata is used for the following system options:

By default, metadata is stored as files in the object trajectory database in the local Server directory that was selected when installing Axxon One (see 설치) in the vmda_db\VMDA_DB.0\vmda_schema subfolder.