Top 100 XR (AR/VR/MR) Keywords

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#XR#AR#VR#glossary

Top 100 XR (AR/VR/MR) Keywords

🕶️ 1. Hardware, Optics & Displays

  • XR (Extended Reality): An umbrella term encompassing Virtual, Augmented, and Mixed Reality technologies.
  • AR (Augmented Reality): Overlaying digital information graphics directly on top of the real physical world.
  • VR (Virtual Reality): Plunging users into fully enclosed, simulated digital computer environments.
  • MR (Mixed Reality): Blending physical and virtual spaces where digital and real objects co-exist and interact.
  • HMD (Head-Mounted Display): A wearable headset device containing display lenses positioned before a user’s eyes.
  • FOV (Field of View): The total angular extent of the visible world viewable through an optics display.
  • PPD (Pixels Per Degree): A metric measuring display sharpness by counting pixels available per degree of view.
  • Waveguide: Optical components guiding micro-projected light paths directly into wearer eye regions.
  • Video See-Through (VST): Digitally capturing the real world via external cameras and showing it on internal VR screens.
  • Optical See-Through (OST): Viewing the real world directly through transparent glass while projecting digital holograms onto it.
  • IPD (Interpupillary Distance): The distance between the centers of a user’s pupils, vital for proper lens calibration.
  • Refresh Rate: The number of times per second a display updates its image frames, measured in Hertz (Hz).
  • MTP Latency (Motion-to-Photon): The delay time between a user moving their head and the display updating its pixels.
  • Foveated Rendering: Dropping rendering resolution in peripheral view zones to save GPU compute power.
  • Micro-OLED: High-density miniature displays offering rich contrast and deep black levels for modern headsets.

🛰️ 2. Tracking, Localization & Sensing

  • 6DoF (Six Degrees of Freedom): Tracking both rotational movements (pitch, yaw, roll) and translational movements (X, Y, Z coordinates).
  • 3DoF (Three Degrees of Freedom): Tracking orientation transformations (pitch, yaw, roll) without tracking spatial positional changes.
  • Inside-Out Tracking: Utilizing headset-mounted cameras to track spatial movement without external base stations.
  • Outside-In Tracking: Tracking user movements using static external sensors placed around a physical room.
  • Inside-Out Eyetracking: Micro-cameras tracking pupil positions to evaluate user focus and drive foveated rendering.
  • SLAM (Spatial Mapping): Real-time mapping algorithms plotting physical rooms so headsets can lock digital objects to floor planes.
  • Passthrough: Streaming external camera video feeds onto screens so users can see their real rooms without removing headsets.
  • Hand Tracking: Articulated tracking of fingers and palms using computer vision, removing the need for physical controllers.
  • Immersive Spatial Audio: Audio rendering that dynamically shifts directional sound cues based on user head turns.
  • HRTF (Head-Related Transfer Function): Algorithms modeling how individual ear shapes filter sound to create true 3D audio.
  • ToF Depth Sensor: Sensors measuring light reflection flight times to map furniture topologies instantly.
  • Occlusion Tracking: Resolving visual layers so real-world pillars can hide digital objects sitting behind them.
  • Controller Tracking: High-frequency infrared or optical monitoring of hand controllers to capture exact user button actions.
  • Anomalous Drift: Positional errors caused by sensor noise making virtual assets float away from real anchor spots.
  • IMU Fusion: Merging gyroscope and accelerometer data to predict instant head position adjustments between camera updates.

🎨 3. Graphics, Rendering & Spatial Assets

  • Spatial Anchor: A digital coordinate marker locking a virtual asset to an exact spot in a physical room permanently.
  • Volumetric Video: Capturing real human performances using multi-camera arrays to turn them into viewable 3D holograms.
  • NeRF (Neural Radiance Fields): AI models synthesizing complex 3D scenes from sparse sets of 2D photographs.
  • 3D Gaussian Splatting: A real-time radiance field technique modeling complex spaces using millions of point clouds.
  • Occlusion Culling: Disabling the rendering of 3D objects currently hidden behind closer assets to save memory.
  • Draw Calls: The commands sent by CPUs instructing GPUs to render specific object meshes.
  • LOD (Level of Detail): Dynamically reducing a 3D asset’s polygon count as it moves further away from the user.
  • Skybox: A panoramic background image wrapped around a virtual scene to simulate distant skies and horizons.
  • Spatial Mapping Mesh: The triangular wireframe structure generated by headsets to represent real-world physical surfaces.
  • Baked Lighting: Pre-calculating light and shadows onto object textures to avoid expensive real-time lighting calculations.
  • PBR (Physically Based Rendering): Shading methods simulating how light behaves realistically with metal, plastic, or matte surfaces.
  • Avatar: The digital 3D representation chosen by a user to project their identity inside virtual environments.
  • Glance-Based Activation: Interactive UI items that trigger actions simply by a user looking at them for a set duration.
  • Polygon Budget: The maximum number of 3D triangles a scene can contain while maintaining smooth frame rates.
  • Passthrough Tinting: Adjusting the color and opacity blends of real-world video layers to match digital lighting themes.

🕹️ 4. Interaction, UX & Locomotion

  • Teleportation Locomotion: Moving through vast virtual spaces by pointing an arc ray and blinking to destination spots instantly.
  • Smooth Locomotion: Walking through VR spaces continuously using thumbsticks, which can sometimes trigger motion sickness.
  • Gaze-and-Pinch: Selecting a virtual menu item by looking at it and pinching your index finger and thumb together.
  • Raycasting: Projecting a virtual laser pointer line out from a hand controller to select distant 3D UI targets.
  • Diegetic UI: User interfaces integrated naturally into the fictional world (e.g., an in-game wrist watch showing health).
  • Non-Diegetic UI: Traditional 2D menu overlays floating statically over a user’s vision space.
  • Haptic Actuator: Vibration motors inside controllers providing physical click, bump, or texture sensations to fingers.
  • Passive Haptics: Aligning real physical objects (like a real desk) with virtual prop counterparts to give physical texture feel.
  • Active Haptics: Using advanced mechanical gloves that physically stop fingers from closing to simulate a virtual wall.
  • Spatial Menu: Interactive UI layouts wrapped in arcs or panels around a user’s physical body reach zone.
  • Direct Manipulation: Reaching out and grabbing a virtual asset directly using hand models, skipping raycast lines.
  • Object Affordance: Visual design indicators on virtual objects hinting at how they should be grabbed or twisted.
  • Vection: The false psychological illusion of self-motion triggered when visual backgrounds move while you sit still.
  • Virtual Hand Illusion: The psychological sensation of adopting an artificial digital hand model as your own flesh limb.
  • Air Gestures: Specific hand movements (like swiping or waving in mid-air) mapped to system commands.

🧠 5. Human Factors & Perception

  • Immersive Presence: The deep psychological state of feeling genuinely located inside a virtual environment.
  • Cybersickness: Motion sickness triggered by visual-vestibular conflicts inside virtual reality headsets.
  • Vergence-Accommodation Conflict (VAC): Eye strain caused when screens sit close to eyes while digital content focuses far away.
  • Vestibular System: Internal ear mechanisms tracking balance and acceleration, easily upset by artificial visual motion.
  • Simulator Sickness Questionnaire (SSQ): A standard academic diagnostic survey measuring nausea, oculomotor, and disorientation scores.
  • Visual Fatigue: Eye tiredness and dryness caused by prolonged focus on near-eye stereoscopic displays.
  • Perceptual Realism: How closely a digital scene matches human expectations of real-world physical properties.
  • Stereoscopic Depth: Recreating 3D depth perception by feeding slightly offset images to each individual eye lens.
  • Self-Localization: A user’s cognitive understanding of where their body stands relative to ambient spatial landmarks.
  • Break in Presence (BIP): Sudden glitches or real-world interruptions that instantly pull users out of an immersive illusion.
  • Spatial Orientation: The mental mapping ability required to navigate through complex virtual scenes without getting lost.
  • Latency Jitter: Irregular timing shifts between rendering frame outputs, a prime trigger for user headaches.
  • Cognitive Tunneling: A state of hyper-focus where users overlook critical environmental cues due to intense XR prompts.
  • Flicker Vertigo: Dizziness triggered by display panels updating at low frame rates or pulsating light patterns.
  • Proteus Effect: The behavioral phenomenon where users change their actions to match the traits of their active digital avatars.

🌐 6. Software Development, Engines & Web

  • Unity Engine: A highly popular cross-platform game engine widely used to construct XR interactive experiences.
  • Unreal Engine: A high-end rendering engine utilized for photorealistic graphics and enterprise virtual productions.
  • OpenXR: An open royalty-free standard cross-platform API unifying development across diverse headset vendor hardwares.
  • WebXR: A web API enabling browsers to serve immersive VR and AR experiences directly without installing apps.
  • MRTK (Mixed Reality Toolkit): A component collection providing foundational spatial interaction scripts for developers.
  • ARKit: Apple’s native software development framework for deploying AR capabilities onto iOS mobile devices.
  • ARCore: Google’s native software development framework for deploying AR capabilities onto Android mobile devices.
  • Spatial Anchors API: Cloud databases letting separate headsets download and view identical shared spatial coordinate maps.
  • Prefabs: Reusable, pre-configured 3D object assets that developers can easily duplicate across scenes.
  • Vertex Shader: Graphics code calculating coordinate transformations for object mesh corner points.
  • Fragment Shader: Graphics code calculating final color values for individual screen pixels.
  • Universal Render Pipeline (URP): An optimized rendering pipeline built for maintaining high framerates on mobile chip headsets.
  • Spatial Audio SDK: Software kits managing sound propagation, room wall reflections, and real-time audio panning.
  • Headset Passthrough API: Developer tools allowing access to background camera image masks for blending custom graphics.
  • Asset Bundle: External archive files containing meshes and textures loaded at runtime to minimize initial app sizes.

🏢 7. Platforms, Paradigms & Industrial Applications

  • Metaverse: A theoretical network of persistent, interconnected 3D virtual worlds where communities interact.
  • Digital Twin: A photorealistic, real-time data-linked virtual copy of a physical factory or asset.
  • Spatial Computing: A computing paradigm shifting inputs from flat screens into 3D physical spaces.
  • Enterprise XR: Immersive systems tailored for high-stakes medical, aerospace, or automotive manufacturing workflows.
  • Remote Assistance: AR workflows where expert technicians annotate live video feeds to guide local field workers.
  • Virtual Production: Utilizing LED wall backdrops tracked with cameras to shoot real actors inside digital film sets.
  • Co-Location Multi-player: Systems allowing multiple local users wearing headsets to see the same digital assets in one room.
  • Spatial Collaboration: Distributed digital rooms where global teams meet as 3D avatars to share data slide decks.
  • Virtual Showroom: Interactive shopping portals letting consumers view true-scale 3D products inside their homes before buying.
  • Cloud XR Rendering: Offloading heavy 3D rendering tasks to remote server farms and streaming video back to lightweight headsets.
  • Immersive Architecture: Reviewing full-scale 3D structural building mockups virtually before starting real construction.
  • Surgical Simulation Training: High-fidelity medical modules letting residents practice intricate operations within risk-free VR views.
  • Telepresence: The technology of manifesting a user’s presence vividly at a remote physical location via proxy hardware.
  • Walled Garden Platform: Closed headset ecosystems restricting app distributions strictly to proprietary market storefronts.
  • Asymmetric XR Play: Cooperative games or apps where one player wears an HMD while others interact via normal flat screens.