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

1      Definition

An Item representing an Object’s  orientation, orientation velocity, and orientation acceleration.

2      Functional Requirements

  • The Orientation of an Object is that of the principal axis of an Object.
  • The following media types are supported: Speech, Audio; Visual; 3D Model; Audio-Visual; Haptic; Smell; RADAR; LiDAR; Ultrasound.
  • Accuracy is the estimated absolute difference between the measures of each of  Orientation,  OrientVelocity, and OrientAccel and their true values.

3      Syntax

https://schemas.mpai.community/OSD/V1.3/data/Orientation.json

4      Semantics

Table 1 provides the semantics of the components of Orientation. It should be noted that the Euler angles are indicated by (α,β,γ).

Table 1 – Semantics of Orientation

Label Size Description
Header N1 Bytes Orientation Header
– Standard-Orientation 9 Bytes The characters “OSD-OOR-V”
– Version N2 Bytes Major version – 1 or 2 characters
– Dot-separator 1 Byte The character “.”
– Subversion N3 Bytes Minor version – 1 or 2 characters
MInstance N4 Bytes ID id Virtual space Orientation refers tu
ObjectOrientationID N5 Bytes  Identifier of Object Orientation.
General N6 Bytes Set of general data
– ObjectType N8 Bytes One of Digital Human, Generic.
– MediaType N9 Bytes One of Speech, Audio, Visual, Audio-Visual, Haptic, Smell, RADAR, LiDAR, Ultrasound.
Orientation
– Orient (α,β,γ) N10 Bytes Array (in degrees)
– OrientAccuracy N11 Bytes Array of (α,β,γ) Accuracy
Velocity of Orientation
– OrientVelocity (α,β,γ) N12 Bytes Array (in degrees/s)
– OrientVelocityAccuracy N13 Bytes Array of (α,β,γ) Velocity Accuracy
Acceleration of Orientation
– OrientAccel (α,β,γ) N14 Bytes Array (in degrees/s2)
– OrientAcceAccuracy N15 Bytes Array of (α,β,γ) Acceleration Accuracy
DescrMetadata N16 Bytes Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with Orientation (OSD-OOR) V1.2 if:

  1. The Data validates against the Orientation’s JSON Schema.
  2. All Data in the Orientation’s JSON Schema have the specified types.

6     Performance Assessment