diff --git a/.antora/modules/specification/nav_introduction.adoc b/.antora/modules/specification/nav_introduction.adoc index de22c361..b612b805 100644 --- a/.antora/modules/specification/nav_introduction.adoc +++ b/.antora/modules/specification/nav_introduction.adoc @@ -3,6 +3,9 @@ ** xref:general_docs/introduction.adoc[] ** xref:general_docs/scope.adoc[] ** xref:general_docs/normative_references.adoc[] -** xref:general_docs/terms_and_definitions.adoc[] ** xref:general_docs/abbreviations.adoc[] -** xref:general_docs/backward_compatibility.adoc[] \ No newline at end of file +** xref:general_docs/backward_compatibility.adoc[] +* Terms and definitions +** xref:terms_and_definitions/terms_and_definitions.adoc[] +* Use cases +** xref:use_cases/use_cases.adoc[] diff --git a/content/terms_and_definitions/terms_and_definitions.adoc b/content/terms_and_definitions/terms_and_definitions.adoc index 190beafc..ce92e07e 100644 --- a/content/terms_and_definitions/terms_and_definitions.adoc +++ b/content/terms_and_definitions/terms_and_definitions.adoc @@ -6,7 +6,113 @@ ifndef::include-only-once[] include::{root-path}_config.adoc[] endif::[] -TODO: Add terms and definitions +3D asset:: +The combination of an object's 3D geometry, assigned material properties, and +specific metadata. -Static road network:: -Collection of connected roads enriched by static objects that do not change during runtime of a simulation. +3D model:: +A mathematical coordinate-based representation of an object's geometrical +surface. Material properties used for rendering purposes can be part of the 3D model. This excludes physical material properties. For a combination of 3D +geometry and physical material properties, see 3D asset. + +Related terms: 3D asset, 3D environment. + +3D environment:: +A 3D representation of a simulated sensor's surroundings. It can consist of +multiple 3D assets. + +Co-simulation:: +Simulation of multiple independent models connected with interfaces. A +co-simulation platform handles the timing, synchronization, and data transfer between the +individual models. + +Ground truth:: +Defines true static and dynamic states of objects. The true states are either +determined by the content creator or defined by an omniscient observer, for +example, a simulation platform. + +Machine perception:: +The ability of systems to interpret sensory data and to reliably detect objects +and other road users relevant to the operation of automated driving. The data is +used to generate situational awareness of the vehicle environment. + +* Source: Klaus Dietmayer, Predicting of Machine Perception for Automated Driving, 2016 + +Material:: +A collection of material properties belonging to one entity. + +Material assignment:: +A mapping of material IDs to meshes of 3D models, or pixels of textures mapped to these meshes. The material ID is a unique +pointer to a set of material properties in separate material files. + +Material classification:: +Standardized classification scheme that sorts materials into classes and groups +of classes, for example, based on their physical properties. + +Material parameter file:: +A file in JSON format containing defined material properties according to the +OpenMATERIAL standard. + +Material property:: +Denotes a physical, chemical, or geometric property of a material. + +Multispectral/hyperspectral material:: +Material with wavelength-specific properties that are defined for multiple spectra. + +Multispectral material shows up in imagery as 3-10 wider bands. +Hyperspectral material shows hundreds of narrow bands. + +Object:: +A tangible thing with defined 3D boundaries and discrete meshes. An object ID +can be assigned. + +Object part:: +A segment of an object that has distinct characteristics, for example, material, +shape, or function. + +Example: A car door differs from the rest of the vehicle due to its function +to open and close. + +Object type:: +Class of objects with the same set of properties. Each instance of the class is +described by the same properties, but has individual property values. + +Physical property:: +Denotes a characteristic of an object or material that can be measured. +Examples: permittivity, density, index of refraction. + +Post rendering effect:: +Visual modification applied to graphics after initial rendering, enhancing +appearance or realism without impairing performance. + +Scenario:: +A description of the behavior or temporal evolution of physical objects and +environmental conditions on the driving infrastructure over an interval of time, +including the movement of traffic participants or the change of environmental +conditions. + +* Source: ASAM OpenSCENARIO v1.3.0 standard, 2024 + +Signal energy propagation:: +The act of a signal traveling through the environment and potentially +interacting with objects and particles. + +* Source: Linnhoff et al., Towards Serious Perception Sensor Simulation for Safety Validation of Automated Driving - A Collaborative Method to Specify Sensor Models, 2021 + +Simulation platform:: +Application that orchestrates and runs the simulations. It can be either an +all-in-one solution including the generation of the 3D environment or a +co-simulation platform orchestrating a co-simulation of multiple sensor models, vehicle dynamics models, and so on. + +Surface normal:: +A vector that is perpendicular to a given object, surface, or geometrical +primitive. It can be used to determine the face direction for 2D and +3D rendering. + +Validation:: +A method for evaluating a simulation model's performance and accuracy by +comparing simulated data to measured data and quantifying the differences. + +Vertex normal:: +A directional vector that is associated with a vertex. It represents the +normalized average of the surrounding surface normals.