Documentation for Axxon One 2.0. Documentation for other versions of Axxon One is available too.

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Metadata is any accompanying data to any basic information. 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:

  1. By analyzing video on the server by detectors (see General information about detectors and their sub-detectors).
  2. By receiving ready metadata from the embedded camera analytics (see General information about embedded detectors).

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.

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.

Note

If necessary, you can place metadata in network storage (see Configuring storage of the system log and metadata).

The following detectors are used for the server-side analysis and metadata generation:

DetectorPossible information about an object contained in metadata from the detector
Neural tracker
  • Object type
  • Object size
  • Object color
  • Position of an object in the frame
  • Object speed
  • Direction of movement of an object
Object tracker
Human tracker VL
Stopped object detector
  • Object type
  • Object size
  • Position of an object in the frame
Motion detector
  • Object type
  • Object color
Face detector VA
  • Face vector
  • Face bounding box
  • Gender
  • Age
  • Position of a face bounding box in the frame
Face detector TV
Face detector VL
License plate recognition BRS
  • Vehicle license plate
  • License plate bounding box
  • Position of a license plate bounding box in the frame
  • Direction of vehicle movement
  • Region
  • Country
  • License plate type
  • Vehicle manufacturer
  • Vehicle model
  • Vehicle color
  • Vehicle class
  • Vehicle bounding box
  • Position of a vehicle bounding box in the frame
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
  • Vehicle manufacturer
  • Vehicle model
  • Vehicle color
  • Vehicle class
  • Vehicle bounding box
  • Position of a vehicle bounding box in the frame
  • Direction of vehicle movement

Human pose detector and its sub-detectors:

  • Position of an object in the frame
  • Pose of an object in the frame
Equipment detector
  • Position of an object in the frame
Equipment detector VL
Barcode detector
  • Contents of a barcode in the frame

Metadata is used for the following system options to work:

Option

Required source of metadata

Standard sub-detectors

Search in archive

Face search

Search by LPs

Vehicle search

Search by barcode

TimeCompressor

Functions for tracking moving objects

Object tracking

Autozoom

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