Mobile Motion Capture
Also known as: in-browser motion capture, phone-based motion tracking
Mobile motion capture is the process of using a smartphone camera and on-device pose estimation to track body movement in real time or from a recorded clip — no specialized hardware required.
Traditional motion capture uses reflective markers and dedicated camera arrays in a lab. Mobile motion capture replaces that hardware with a phone camera and AI — democratizing the technology but with real accuracy tradeoffs that SwingVantage is explicit about. On-device processing keeps the video on your device; network processing allows more powerful models. Both modes label their outputs with appropriate confidence levels so the tradeoffs are always visible.
Example
A golfer records their swing on a phone at the range; mobile motion capture tracks 33 landmarks in real time and flags a hip sway without any additional equipment.
Related terms
- Pose EstimationPose estimation is the computer-vision process that detects the positions of major body joints (keypoints) in each video frame, producing the skeleton that SwingVantage uses to measure angles and movement patterns.
- Skeleton OverlayA skeleton overlay is the on-screen visualization of detected body joints and the lines connecting them, drawn over your video so you can see exactly what the system tracked.
- Phone Video LimitationsPhone video limitations are the practical constraints of recording on a smartphone — lens distortion, stabilization artifacts, variable frame rate, and compressed color depth — that can reduce analysis accuracy relative to purpose-built cameras.
- Motion LabMotion Lab is the browser-based 3D motion analysis tool in SwingVantage that turns your video into a three-dimensional avatar and timeline, letting you rotate, scrub, and measure your swing without any installed software.
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