What are the best multiple marker image recognition techniques for anchoring AR objects on construction sites?
Use fiducial markers (like ArUco or AprilTag patterns) printed on weatherproof signs placed at known coordinates throughout the site. The AR application detects these markers via the camera, computes the device's exact position relative to the marker, and anchors the BIM overlay with centimeter-level accuracy. For marker-less tracking in open areas, combine GPS with visual-inertial odometry and surface detection from Lidar-equipped devices.
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