Related Experiment Video
Updated: Jan 30, 2026
04:55
Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats
Published on: June 17, 2020
4.0K
Validity of a novel method to measure vertical oscillation during running using a depth camera
Journal of Biomechanics
|January 21, 2019
Summary
Low-cost depth cameras accurately measure vertical oscillation (VO) in running gait. This study validates Kinect v2
Area of Science:
- Biomechanics
- Motion Analysis
- Rehabilitation Technology
Background:
- Conventional 3D motion capture systems are expensive for gait analysis.
- Low-cost depth cameras offer a potential clinically accessible alternative.
- Validity of depth cameras for running gait parameters like vertical oscillation (VO) is not well-established.
Purpose of the Study:
- To assess the validity of vertical oscillation (VO) measurements during running gait using raw depth camera data.
- To compare VO data from a Microsoft Kinect v2 depth camera against a 3D multi-camera motion capture system.
Main Methods:
- Sixteen healthy adults performed treadmill running at 2.7 m/s.
- Vertical oscillation (VO) was captured simultaneously using Microsoft Kinect v2 and Vicon 3D motion capture.
- Agreement was analyzed using Bland-Altman plots, Pearson's correlation (r), and Lin's concordance correlation (rc).
Main Results:
- Kinect v2 depth data showed excellent validity for VO measurement (r=0.97, rc=0.97).
- 95% Limits of Agreement were -8.0 mm to 8.7 mm.
- Average absolute error was 3.7 mm (2.1%) and percent error was 4.0% (2.0%).
Conclusions:
- A low-cost depth camera (Kinect v2) and novel tracking method can accurately measure vertical oscillation in running gait.
- This technology presents a clinically viable option for gait analysis.
- Further research can explore broader clinical applications of depth cameras in motion analysis.
Related Concept Videos
01:29Reliability and Validity
13.9K
Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.
13.9K
01:17Wald-Wolfowitz Runs Test II
548
The Wald-Wolfowitz runs test, commonly referred to as the runs test, is a nonparametric test used to assess the randomness of ordered data. The test evaluates the number of runs, which are consecutive sequences of similar elements within the data. If the number of runs is significantly higher or lower than expected, the data is considered non-random, indicating a detectable pattern or structure.
For binary data, runs are identified using symbols such as + and −, or equivalently, 1s and 0s. In...
For binary data, runs are identified using symbols such as + and −, or equivalently, 1s and 0s. In...
548
01:17Wald-Wolfowitz Runs Test I
960
The Wald-Wolfowitz test, also known as the runs test, is a nonparametric statistical test used to assess the randomness of a sequence of two different types of elements (e.g., positive/negative values, successes/failures). It examines whether the order of the elements in a sequence is random or if there is a pattern or trend present. This nonparametric test applies to any ordered data despite the population and sample data distribution, even if a higher sample size is available.
The test works...
The test works...
960
01:23Vertical Curve: Problem Solving
490
Vertical curves provide the transition between two roadway grades, ensuring safety, comfort, and functionality. Calculating elevations at specific stations along the curve involves several systematic steps based on the curve's geometry and provided design parameters.The vertical curve is defined by its length, grades, Point of Vertical Intersection (P.V.I.) location, and P.V.I. elevation. The stations of the Point of Vertical Curvature (P.V.C.), where the curve begins, and the Point of Vertical...
490
01:30Oscillations In An LC Circuit
3.1K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
3.1K
01:06Forced Oscillations
8.0K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
8.0K