Objective Telehealth: From Observation to Measurement

In this section, we explore the principles behind markerless motion capture and camera-based movement analysis.

Using ordinary cameras, computer vision systems can estimate body landmarks, create geometric relationships between them, and calculate clinically useful movement measures.

In this lesson, we cover:

• Markerless pose estimation

• Body landmarks

• Joint geometry

• Movement over time

• Tracking quality

• Measurement limitations

• Clinical interpretation

The objective is not to replace clinical expertise, but to support it with objective information.

Practical demonstrations use PoseIQ Live.

In this section, we look at the simple workflow behind remote movement measurement with PoseIQ Live. A clinician sends one link, the patient opens it on their phone, steps into view, performs a movement, and the clinician receives movement information in real time. This approach can work alongside Zoom, Google Meet, or a standard phone call, keeping the technology simple for both clinicians and patients.

How can we move from simply observing movement to measuring it objectively?

In this section, we explore how camera-based movement measurement works, from identifying body landmarks and calculating joint angles to tracking motion over time and estimating range of motion.

We also look at the most important principle: objective data supports professional judgement, rather than replacing it.

Movement is more than joint angles. In this section, we explore how camera-based tracking can be used to visualize whole-body sway and movement trajectories.

We look at how sway patterns change across different tasks, what those patterns may tell us about stability and movement strategy, and the important difference between a practical camera-based body-centre estimate and laboratory-grade centre-of-mass measurement.

Learn how movement data moves from observation and measurement to useful clinical context and reporting.

Learn the simple setup principles that improve camera-based movement tracking, from lighting and framing to visibility and video quality.

Learn some practical applications of teleheath and remote rehabilitation and what comes next following this course.

A quick demonstration of PoseIQ Live, showing how clinicians, therapists and coaches can assess movement remotely using a standard camera. It enables real-time movement tracking and objective measurements through a simple browser-based workflow, with no specialised equipment required.