Go to MPAI-OSD Data Types

Definition Functional Requirements Syntax Semantics Conformance Testing Performance Assessment

1        Definition

A Data Type including a collection of Basic LiDAR Objects.

A LiDAR Object can have a hierarchical structure where LiDAR Objects contain Basic LiDAR Objects and LiDAR Objects.

2        Functional Requirements

A LiDAR Object may include:

  1. ID of a Virtual Space (M-Instance) where it is or intended to be located.
  2. ID of the LiDAR Object.
  3. Space-Time information of the LiDAR Object.
  4. Basic LiDAR Object and LiDAR Objects included in the LiDAR Objects.

Note that.

  1. A LiDAR Object that does not include Sub-Scenes and only one Basic LiDAR Object is a Basic LiDAR Object.
  2. The Space-Time information of a Basic LiDAR Object and LiDAR Object included in a LiDAR Object may be superseded by the Space-Time information of the LiDAR Object containing them.

3        Syntax

https://schemas.mpai.community/OSD/V1.5/data/LiDARObject.json

4        Semantics

Label Description
Header LiDAR Object Header – Standard “OSD-LIO-Vx.y”.
MInstanceID Identifier of M-Instance.
LiDARObjectID Identifier of the LiDAR Object.
LiDARObjectSpaceTime Space-Time of LiDAR Object.
BasicLiDARObjectCount Set of Parent LiDAR Objects.
BasicLiDARObjects[] Set of Basic LiDAR Objects.
– SpaceTime Space Time of a Basic LiDAR Object in the LiDAR Object.
– BasicLiDARObject A Basic LiDAR Object in the LiDAR Object.
LiDARObjectCount Number of LiDAR Objects.
LiDARObjects[] Set of LiDAR Objects.
– SpaceTime Space Time of a LiDAR Object in the LiDAR Object.
– LiDARObject A LiDAR Object in the set of LiDAR Objects.
DataXMData Information of this LiDAR Object Instance.
DescrMetadata Descriptive Metadata

5        Conformance Testing

A Data instance Conforms with LiDAR Object (OSD-LIO) if:

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

6        Performance Assessment