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Documentation for Axxon One 2.0. Documentation for other versions of Axxon One is available too.
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Metadata is information that describes the behavior of objects in the camera FOV.
In Axxon One, you can get metadata in two ways:
- By analyzing video on the Server by detection tools.
- By receiving ready metadata from the embedded camera analytics (see Embedded Detection Tools).
Attention!
To get metadata, video is decompressed and analyzed, which leads to a heavy load on the Server and limits the number of cameras that you can use on it.
The following tools are used for the Server-side analysis and metadata generation:
| Detection tool | Information contained in metadata from the detection tool |
|---|---|
| Neurotracker | Metadata from Object Tracker and Neurotracker contains the following information about all objects moving in the frame: object type, position in the frame, size and color, speed, direction of movement, and so on |
| Object Tracker | |
| Motion detection | Metadata from Motion detection is less accurate and doesn't contain information about object type and color |
| Face Detection VA | Metadata from Face Detection contains a face bounding box, its position in the frame, and a face vector |
| Face Detection TV | |
| Face Detection VL | |
| License Plate Recognition BRS | Metadata from License Plate Recognition detection tools contains a license plate bounding box, its position in the frame, and a vehicle license plate |
| License Plate Recognition IV | |
| License Plate Recognition RR | |
| License Plate Recognition RR—Search In Archive | |
| License Plate Recognition RR—Parking | |
| License plate recognition (VT) | |
| Vehicle Recognition RR | Metadata from Vehicle Recognition contains a vehicle bounding box that is built around vehicle outline, position of the vehicle bounding box in the frame, information about the vehicle model, manufacturer, color, and class |
Pose Detection and its sub-tools: | Metadata from Pose Detection tools contains information about positions and pose (skeleton) of all people in the frame |
| Equipment detection tool (PPE) | Metadata from Equipment detection contains information about the position of all people in frame |
| PPE detection VL | |
| Barcode Detection | Metadata from Barcode Detection contains information about the contents of all barcodes in the frame |
Metadata is used for the following system options to work:
Attention!
If a camera uses several sources of metadata, the required source is selected automatically, except for MomentQuest.
To perform face/license plate search, only metadata from the corresponding detection tools is used.
Metadata is stored as files in the object tracks database in the local Server directory that was selected when installing Axxon One (see Installation) in the vmda_db\VMDA_DB.0\vmda_schema subfolder.
Note
If necessary, you can place metadata on any available network storage (see Configuring storage of the system log and metadata).
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