PGM-AUA V1.0 AIMs - Directed Visual Scene Description

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

1 Functions

The Directed Visual Scene Description (PGM‑DVS) AIM is a directed describer SubAIM of Context Capture. It produces the Visual Scene Descriptors of the current scene from the captured Visual Object, refining its description against the interaction‑history Visual Scene Descriptors supplied to it. The coarse scene geometry (object identifiers and their Space‑Time) is the coarse part of the Visual Scene Descriptors it produces.

Directed Visual Scene Description holds no judgement of its own about what context to retrieve or store: it describes what it is given. The decision of which interaction‑history descriptors to supply, and the correlation with A‑User Control’s Directive, rest with the CXC-AUS Interface, which drives this SubAIM and collects its output.

The PGM‑DVS AIM:

Receives	Visual Object	The captured visual data of the current scene.
	IH Visual Scene Descriptors	Interaction‑history Visual Scene Descriptors, supplied by the CXC-AUS Interface, against which the current description is refined.
Produces	Visual Scene Descriptors	The Visual Scene Descriptors of the current scene, returned to the CXC-AUS Interface and output to Enhanced Context Description.

2 Reference Model

Figure 1 depicts the Reference Model of the Directed Visual Scene Description (PGM‑DVS) AIM.

Figure 1 – Reference Model of the Directed Visual Scene Description (PGM‑DVS) AIM

3 I/O Data

Table 1 specifies the Input and Output Data of the Directed Visual Scene Description (PGM‑DVS) AIM.

Table 1 – Input and Output Data of the Directed Visual Scene Description (PGM‑DVS) AIM

Input	Description
Visual Object	The captured visual data of the current scene.
IH Visual Scene Descriptors	Interaction‑history Visual Scene Descriptors, supplied by the CXC-AUS Interface, against which the current description is refined.
Output	Description
Visual Scene Descriptors	The Visual Scene Descriptors of the current scene, returned to the CXC-AUS Interface and output to Enhanced Context Description.

4 SubAIMs

No SubAIMs.

5 JSON Metadata

https://schemas.mpai.community/PGM1/V1.0/AIMs/DirectedVisualSceneDescription.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 Directed Visual Scene Description (PGM‑DVS) 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 Directed Visual Scene Description (PGM‑DVS) AIM

Receives	Visual Object	Shall validate against Visual Object schema.
	IH Visual Scene Descriptors	Shall validate against Visual Scene Descriptors schema.
Produces	Visual Scene Descriptors	Shall validate against Visual Scene Descriptors schema.

9 Performance Assessment