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Metadata is any accompanying data to any basic information that describes the behavior of objects in the camera FOV. Metadata refers to additional information about the content or object. It reveals information about the attributes and properties that characterize an entity, allowing you to automatically search and manage it in large information flows.
In Axxon One, you can get metadata in two ways:
- By analyzing video on the Server by detection tools
- server by detectors (see General information about detectors and their sub-detectors).
- By receiving ready metadata from the embedded camera analytics (see Embedded Detection Tools
- General information about embedded detectors).
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To get metadata, video is decompressed and analyzed, which leads to a heavy load on the Server server and limits the number of cameras that you can use on it. |
Metadata are VMDADB files and are stored in the object tracks database. Path to the metadata folder: <Local directory of the server selected when installing Axxon One (see Installation)>\vmda_db\VMDA_DB.0\vmda_schema.
| Info | ||
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If necessary, you can place metadata in network storage (see Configuring storage of the system log and metadata). |
The following detectors The following tools are used for the Serverserver-side analysis and metadata generation:
| Detector | Possible information about an object |
|---|
| contained in metadata from the |
|---|
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
Metadata from Motion detection is less accurate and doesn't contain information about object type and color
Metadata from License Plate Recognition detection tools contains a license plate bounding box, its position in the frame, and a vehicle license plate
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
| detector | |
|---|---|
| Neural tracker |
|
| Object tracker | |
| Human tracker VL | |
| Stopped object detector |
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| Motion detector |
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| Face detector VA |
|
| Face detector TV | |
| Face detector VL | |
| License plate recognition BRS |
|
| 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 XR | |
| Vehicle recognition RR |
|
Pose Detection and its sub-tools:
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| |||||
| Equipment |
| detector |
|
| Equipment detector |
Metadata from Equipment detection contains information about the position of all people in frame
| VL |
| Barcode |
| detector |
|
|
Metadata is used for the following system options to work:
Option | Required source of metadata |
|---|---|
Object Tracker, Neurotracker, Embedded Detection Tools, or Motion detection
Object Tracker, Neurotracker, Embedded Detection Tools, Motion detection, Category: Face, Category: Vehicle, Pose Detection, Equipment detection (PPE)
Object Tracker, Neurotracker, Embedded Detection Tools, or Motion detection
Object Tracker, Neurotracker, Embedded Detection Tools, or Motion detection
Any
Any
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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.
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