Hand measurement based on integrated vision system – Leap Motion

Abstract

This paper presents a measurement system for after-stroke patients with disabled hands, based on an integrated vision system – Leap Motion. The device provides a simplified way to measure a set of hand parameters such as hand size, wrist, and fingers range of motions. Using the homogeneous-matrix-based notation, we derive medically relevant medical parameters. We provide a user interface for ease of data processing, experiments, and tracking patient progress. The system is evaluated for precision and measurement variation and compared to measurements based on goniometer and caliper. Evaluation of the system shows comparable results to caliper measurements for hand bone lengths while higher variation and large difference in wrist and finger flexion range of motion measurements compared to goniometer.