MPAI-OSD V1.5 AIM - Visual Scene Description

Function
Ref. Model
I/O Data
SubAIMs
JSON MData
Profiles
Ref. Software
Conformance
Performance

1 Functions

The Visual Scene Description (OSD‑VSD) AIM receives Visual Objects, the Descriptors of the Scene the Objects belong to, and their Space-Time information as inputs and produces the Descriptors of a Scene composed of Visual Objects and Scenes. The OSD‑VSD AIM may also produce an Alert conveying information on potential anomalies in the input Visual Objects:

Receives	Space-Time	Of the input Objects having the same time base.
	Visual Objects	Individual Visual Objects.
	Scene Descriptors	Scene the Objects belong to.
Integrates	Space-Time and Visual Object	With Scene Descriptors.
Produces	Visual Scene Descriptors	Output of AIM.
	Alert	Signalling potential anomalies in Object.

2 Reference Model

Figure 1 depicts the Reference Model of the Visual Scene Description (OSD‑VSD) AIM.

Visual Scene Description OSD-VSD AIM

Figure 1 – The Visual Scene Description (OSD‑VSD) AIM

3 I/O Data

Table 1 specifies the Input and Output Data of the Visual Scene Description (OSD‑VSD) AIM.

Table 1 – I/O Data of the Visual Scene Description (OSD‑VSD) AIM

Input	Description
Space-Time	Space-Time of input Objects.
Visual Objects	Input Visual Objects.
Scene Descriptors	Input Scene Descriptors.
Output	Description
Visual Scene Descriptors	The output Visual Scene Descriptors.
Alert	Data signalling potential anomalies in Object.

4 SubAIMs

No SubAIMs.

5 JSON Metadata

https://schemas.mpai.community/OSD/V1.5/AIMs/VisualSceneDescription.json

6 Profiles

No Profiles.

7 Reference Software

Not part of this specification.

8 Conformance Testing

Table 2 provides the Conformance Testing Method for the OSD‑VSD AIM.

If a schema contains references to other schemas, conformance of data for the primary schema implies that any data referencing a secondary schema shall also validate against the relevant schema, if present, and conform with the Qualifier, if present.

Table 2 – Conformance Testing Method for the OSD‑VSD AIM

Receives	Space-Time	Shall validate against Space-Time schema.
	Visual Objects	Shall validate against Visual Object schema. Media-specific Data shall conform with their Qualifiers.
	Scene Descriptors	Shall validate against Scene Descriptors schema.
Produces	Visual Scene Descriptors	Shall validate against Visual Scene Descriptors schema.
	Alert	Shall validate against Alert schema.

9 Performance Assessment