Track 3D — world frame

Observer view — fused live scene from every camera publishing to /ws/detect. To publish frames, open / on a device with a webcam.
connecting…
0cameras
0people
0markers
Setup checklist

Make the world frame trustworthy

1 Intrinsic calibrationLens model solved for each camera. Needed
2 Extrinsic calibrationFloor corners mapped into metres. Needed
3 Publishing cameraAt least one calibrated camera is live. Waiting
accumulating…
drag = orbit · scroll = zoom · right-drag = pan

Waiting for scene data

No publishing cameras are connected yet.

What this view shows
The grey rectangle is the floor — the same one the four corner markers were placed on (per ADR 0012). Each detected marker is drawn at its world-frame XYZ in metres, with an arrow showing yaw. When two markers belong to the same person (ADR 0049: chest+back or hat+chest), they fuse into one body avatar; the arrow then comes from the chest↔back vector — a much more reliable yaw signal than a single marker that may have rotated on the head. The teal wedge marks where the camera is in world coordinates.