1     Definition 2     Functional Requirements 3     Syntax
4     Semantics 5    Conformance Testing 6     Performance Assessment

1      Definition

A Data Type including the Objects of a scene, their sub-scenes, and their arrangement in the scene.

2      Functional Requirements

Scene Descriptors include

  1. Objects
  2. The Descriptors of the Scenes includes in the Scene called Sub-Scenes.
  3. Rights that may be exercised on the Scene.

Scenes may be hierarchical, i.e., they may contain Objects and Scenes.

Scene Descriptors name Acronym JSON
3DModel Scene Descriptors OSD-3BS Link
Audio Scene Descriptors OSD-ABS Link
Audio-Visual Scene Descriptors OSD-MBS Link
LiDAR Scene Descriptors OSD-LBS Link
Offline Map Scene Descriptors OSD-OBS Link
RADAR Scene Descriptors OSD-RBS Link
Speech Scene Descriptors OSD-SBS Link
Ultrasound Scene Descriptors OSD-UBS Link
Visual Basic Descriptors OSD-VBS Link

3      Syntax

https://schemas.mpai.community/OSD/V1.4/data/SceneDescriptors.json

4      Semantics

Label Description
Header Scene Descriptors Header
– Standard-SceneDescriptors The characters “OSD-SCD-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
MInstanceID Identifier of M-Instance.
SceneDescriptorsID Identifier of Scene Descriptors.
SceneDescriptorsSpaceTime Space and Time of Scene Descriptors.
ObjectCount Number of Objects in Scene.
Objects[] Set of Objects.
– Object or ObjectID Object in the Scene of its ID.
– ObjectSpaceTime Space Time of Object.
SubSceneCount Number of Sub-Scenes in Scene.
SubScenes[] Set of Sub-Scenes in the Scene.
– SubScene or SubSceneID Sub-Scene in the Scene or its ID.
– SubSceneSpaceTime Space Time of Sub-Scene.
DescrMetadata Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with Scene Descriptors (OSD-SCD) if:

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

6     Performance Assessment