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Definition Functional Requirements Syntax Semantics Conformance Testing Performance Assessment

1      Definition

An Item including a series of Visual Scene Descriptors for a duration.

2      Functional Requirements

A Visual Event Descriptors instance must include:

  1. The Visual Event Descriptors Header
  2. The ID of the Visual Event Descriptors.
  3. The IDs or the Visual Scene Descriptors of the Visual Scene Descriptors included in the Visual Evenet instance.

A Visual Event Descriptors instance may include:

  1. The ID of a Virtual Space (M-Instance) to which it refers.
  2. The ID of a U-Environment to which it refers.
  3. The Space-Time information of the Visual Event instance.
  4. Information about this Visual Event instance.
  5. Descriptive Metadata.

3      Syntax

https://schemas.mpai.community/OSD/V1.5/data/VisualEventDescriptors.json

4      Semantics

Label Description
Header Visual Event Descriptors Header – Standard “OSD-VED-Vx.y”
MInstanceID Identifier of the M-Instance.
UEnvironment Identifier of the U-Environment.
VisualEventDescriptorsID ID of this Visual  Event Descriptors instance.
VisualEventDescriptorsTime Space and Time of  Visual Event Descriptors.
VisualEventDescriptorsSpaceTime Space and Time of  Visual Event Descriptors.
VisualSceneDescriptors[] Set of Visual Scene Descriptors in the Visual Event.
– VisualSceneObjectSpaceTime A set of Visual Scene Descriptors of the Visual Event.
DataXMData Information on this  Visual Event Descriptors instance.
DescrMetadata Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with MPAI-OSD Visual Event Descriptors (OSD-VED) if:

  1. The Data validates against the Visual Event Descriptors’ JSON Schema.
  2. All Data in the  Visual Event Descriptors’ JSON Schema
    1. Have the specified type
    2. Validate against their JSON Schemas
    3. Conform with their Data Qualifiers if present.

6     Performance Assessment