Augmented Reality

Last updated: August 7, 2026

What is augmented reality?

Augmented reality (AR) blends computer-generated visuals, sounds, or data into a person's live view of their physical surroundings in real time, most often through a smartphone camera, tablet screen, or AR headset.

Businesses increasingly use AR visualization software to give customers a more interactive way to evaluate products before buying. Previewing furniture in a room or trying on glasses virtually helps clarify purchase decisions in ways static photos can't.

How does augmented reality work?

Augmented reality works through three continuous stages: sensing the environment, mapping and processing it, and rendering digital content anchored in place. Running in real time and repeating constantly, this cycle is what makes the digital layer feel locked to the real world rather than floating on top of it.

• Sensing the environment: A camera captures the physical space while motion sensors (an accelerometer and gyroscope) track how the device moves and tilts. AR headsets may add depth sensors such as LiDAR for more precise distance measurement.
• Mapping and processing: Software combines camera imagery and motion data to estimate the device's position and map the environment, a process called visual-inertial SLAM (simultaneous localization and mapping). Simpler AR skips SLAM, placing content with visual markers, GPS, image recognition, or predefined anchors.
• Rendering the overlay: The system draws the 3D model, text, or animation, aligning the virtual camera with the physical one so content matches the real-world view. Lighting estimation and occlusion (digital objects passing correctly behind real ones) make the overlay look like it belongs in the scene, adjusting as the user moves.

Because the stages repeat continuously, low-latency tracking is the central engineering challenge: if processing falls behind the user's movement, digital content jitters or drifts instead of staying anchored.

What's the difference between augmented reality, virtual reality, and mixed reality?

Augmented reality (AR), virtual reality (VR), and mixed reality (MR) differ mainly in how they combine digital content with the physical world. AR adds digital content to a real-world view, VR immerses the user in a simulated environment, and MR anchors spatially aware digital content that interacts with the physical environment. The categories overlap, and some devices support more than one.

If AR is the right fit for your use case, explore the best interactive AR software on G2 to bring digital overlays into your own product or workflow.

What are the types of augmented reality?

Augmented reality can be classified in several overlapping ways by how it recognizes the environment, anchors content, and displays the result. Common approaches include marker-based, markerless, location-based, projection-based, and superimposition AR.

• Marker-based AR: Relies on a predefined visual trigger (a fiducial marker, printed image, or product label) that the camera recognizes to anchor content. It gives precise tracking while the marker stays visible, useful in packaging, print, and assembly guidance.
• Markerless AR: Places content by analyzing the camera view and sensor data (surfaces, depth, feature points, faces, or bodies) rather than a preset marker. Face meshes and feature points drive filters and virtual try-ons.
• Location-based AR: Anchors content to a real-world place using GPS, compass data, visual positioning, or geospatial anchors. Lens in Google Maps is a common example, combining coordinates with visual-positioning data rather than GPS alone.
• Projection-based AR: Projects light or graphics directly onto a physical surface, so the projected surface itself acts as the display.
• Superimposition AR: Recognizes a real object, then partially or fully replaces it with an augmented version, such as overlaying imaging data onto a patient during a procedure.

What is augmented reality used for?

Augmented reality is used across industries to overlay digital information onto real-world tasks, products, and environments. Its most established applications span retail, manufacturing, and field service, healthcare, gaming and entertainment, and navigation.

• Retail and e-commerce: Shoppers preview products in their space or on themselves before buying, from placing furniture in a room to trying on makeup or glasses, an application of AR visualization. Many try-ons run in a browser through WebAR, with no app to install. L'Oréal's ModiFace powers virtual beauty try-ons across many of its brands.
• Manufacturing and field service: Technicians follow repair or assembly instructions overlaid on equipment, while remote experts guide on-site workers by annotating their live view through smart glasses, reducing errors and the need for specialist travel.
• Healthcare: Clinicians overlay imaging and guidance onto the body during procedures. AccuVein uses near-infrared light to project a real-time map of veins onto the skin, helping assess sites for blood draws and IV access.
• Gaming and entertainment: Games and social apps place digital characters and effects into the user's real surroundings, as in Pokémon GO, Snapchat, and Instagram filters.
• Navigation: Lens in Google Maps provides camera-based walking directions in supported locations, combining imagery with location and Street View data.

What are the elements of augmented reality?

Every augmented reality experience depends on three elements: hardware to capture the environment, software to interpret it and position the overlay, and an application that turns those capabilities into a specific user experience.

• Hardware: Captures the environment and displays the result, using sensors (a camera, motion sensors, sometimes a LiDAR depth sensor), a processor, and a display. For most users, that device is a smartphone or tablet; AR glasses and headsets are used for hands-free work.
• Software and development platforms: Interpret the sensor data and render digital content. AR development software provides motion tracking, image and object recognition, environmental mapping, anchoring, and rendering, and includes frameworks such as ARKit and ARCore, along with game engines like Unity, that teams build on rather than writing tracking and rendering from scratch.
• Applications and content: Turn hardware and software capabilities into a specific user experience by defining how users interact with the AR content and supplying 3D models, text, animations, the interface, and task-specific logic.

Frequently asked questions about augmented reality

Here are the most commonly asked questions about augmented reality.

Q1. What equipment do you need for augmented reality?

Most augmented reality runs on hardware you likely already own: a smartphone or tablet with a camera, motion sensors, a processor, and a screen. More immersive, hands-free AR uses dedicated glasses or headsets, and higher-end devices add a depth sensor such as LiDAR for more precise tracking. You also need AR software or an app to map the environment and render the overlay.

Q2. What are the limitations of augmented reality?

Augmented reality still has practical limits. High-end hardware can be costly, and glasses and headsets are still maturing. Running AR drains battery quickly, since the camera, sensors, and rendering work continuously, and tracking can drift in low light, featureless spaces, or reflective surfaces. Its live camera feed also raises privacy considerations around what gets captured and stored.

Q3. How are companies using augmented reality in manufacturing and field service?

In manufacturing and field service, companies use augmented reality to overlay repair and assembly instructions directly onto equipment and to let remote experts guide on-site technicians by annotating their live view. This can reduce errors and limit the need for specialist travel.

Q4. What are augmented reality use cases in retail and e-commerce?

In retail and e-commerce, augmented reality lets shoppers preview products in their own space or on themselves before buying, such as placing furniture in a room or trying on makeup and glasses. These virtual try-on and product-preview experiences help customers make purchase decisions with more confidence.

Learn how the technology evolved from early research to today's devices in our guide to the history of augmented reality.