Media Server 25.4
Media Server Help

# WorldDimensionsMetadata

The name of a metadata field, in the training database, that describes the actual size of a vehicle model.

The metadata field must contain three numbers - the height, length, and width of the vehicle (in that order, separated by spaces). You can use any units, but you do not specify the units and you must use the same units for all perspective features. For example, to specify that a vehicle model is 1.55m high, 4.3m long, and 1.8m wide, the metadata field would contain the value `1.55 4.3 1.8`.

TIP: To add the metadata field to vehicle models in your database, use the action AddVehicleModelMetadata.

Media Server can use this information to reduce the number of false positives by checking that a recognized vehicle is the correct size. Media Server takes into account the position of the vehicle in the scene and its distance from the camera.

You can model vehicles as cuboids, by setting a positive value for all three dimensions. If you set one or two of the dimensions to zero, the vehicle is modeled as a rectangle or line. If you do not add the metadata field to a vehicle model, or set all dimensions to zero, the vehicle model is not used for estimating perspective and vehicles of that model are not filtered by MaxPerspectiveError.

For more information about using perspective in media analysis, see Use Perspective in Media Analysis.

Type: | String
Default: |
Required: | No
Configuration Section: | TaskName
Example: | `WorldDimensionsMetadata=dimensions(m)`
See Also: | FieldOfView MaxPerspectiveError WorldDimensions

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery Media Server 25.4

Topic Title: WorldDimensionsMetadata