STAGE 3 · motion_3d_coverage
3D motion coverage
Share of a session supported by usable 3D body, depth or ARKit evidence.
- Unit
- ratio
- Category / visibility
- data_quality · system_quality
- Capture
- 兼容深度设备 · 经标定多机位
- Compute
- iOS 兼容设备 · PC
- Display
- PC · Web
- Measurement methods
- arkit_body_anchor · depth_body_tracking
- Model
- arkit3d-evidence-v1
What this metric measures
3D motion coverage is an evidence-quality metric, not a movement score. It shows how much of the session can support spatial position or rotation analysis.
How Trampoline Lab calculates it
The client counts valid timestamped 3D body anchors or depth frames and compares their covered duration with the eligible session timeline.
How to interpret it
Review this value before using 3D movement results. Low coverage means the report should fall back to 2D or show the result as unavailable.
Limits and responsible use
Device support, field of view, body-anchor loss and camera movement can reduce coverage. Coverage alone does not prove 3D accuracy.
Implementation contract
Related metrics
Method references
TOPDMS Trampoline Lab metric contract and current client implementation evidence.
Related courses and products
Signed-in members can see current eligible Catalog recommendations. Article definitions never hard-code commercial items.
Metrics to watch →Stable report link
https://x-jump.com/lab/metrics/3d-motion-coverage/No athlete, session or result data is included in this URL.