AR.js is a web-based augmented reality framework used to create immersive experiences directly in a browser using WebGL and WebRTC. It provides a cross-platform runtime that executes on mobile devices and head-mounted displays without requiring a dedicated application installation.
The framework includes a marker-based engine for detecting physical patterns or barcodes to anchor digital overlays, a location-based tool for positioning entities via GPS coordinates, and a face tracking library for anchoring content to human facial features. It supports multi-marker simultaneous tracking, custom marker generation, and the simulation of user positions for testing geospatial experiences.
The system integrates with WebVR and WebXR for head-mounted display support and utilizes background worker threads to optimize marker detection performance. It also includes utilities for monitoring camera hardware states and video stream initialization.