| Definition | Functional Requirements | Syntax | Semantics | Conformance Testing | Performance Assessment |
1 Definition
A Data Type including the Visual Objects of a scene, their time and arrangement in the scene, and the Rights that may be exercised on the scene.
In the following, “Object” and “Scene” are to be read as “Visual Object” and “Visual Scene”, respectively.
2 Functional Requirements
Basic Visual Scene Descriptors include
- Scene Space-Time information.
- Objects.
- Object Space-Time information
The Space-Time of the Visual Objects may be superseded by the Space-Time of the Visual Scene.
5 Syntax
https://schemas.mpai.community/OSD/V1.5/data/BasicVisualSceneDescriptors.json
4 Semantics
| Label | Description |
| Header | Basic Visual Scene Descriptors Header – Standard “OSD-BVS-V”. |
| MInstanceID | Identifier of M-Instance. |
| BasicVisualSceneDescriptorsID | Identifier of Basic Visual Scene Descriptors. |
| SceneCreationTime | Timestamp of scene capture or synthesis |
| GravityValue | The value of Gravity in the Basic Scene measure in m/s2. |
| BasicVisualSceneDescriptorsSpaceTime | Space and Time of Basic Visual Scene Descriptors. |
| ViewerPointOfView | PoV and Aperture of User/Device viewing/capturing scene. |
| GravityValue | Local Gravity. |
| VisualObjectCount | Number of Visual Objects in Basic Visual Scene. |
| BasicVisualSceneObjects[] | Set of Visual Objects. |
| – BasicVisualSceneObject | A Visual Object. |
| – BasicVisualSceneObjectSpaceTime | Space Time of Visual Object. |
| DataXMData | Information about this Basic Visual Scene Descriptors Instance. |
| DescrMetadata | Descriptive Metadata |
5 Conformance Testing
A Data instance Conforms with Basic Visual Scene Descriptors (OSD-BVS) if:
- The Data validates against the Basic Visual Scene Descriptors’ JSON Schema.
- All Data in the Basic Visual Scene Descriptors’ JSON Schema
- Have the specified type
- Validate against their JSON Schemas
- Conform with their Visual Data Qualifiers.