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Markerless motion capture system opens up biomechanics for a wide range of fields

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9 months ago
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Markerless motion capture system opens up biomechanics for a wide range of fields
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Researchers develop markerless motion capture system to push biomechanics "into the wild"
Researchers at CAMERA have developed know-how that may analyze physique motion from 2D video footage with out the necessity for markers. Credit score: College of Tub

Researchers at CAMERA, the College of Tub’s Centre for Evaluation of Movement, Leisure and Analysis Purposes, have developed open entry software program that analyzes movement seize knowledge, with out utilizing markers. They’ve proven the markerless system to supply clinicians, sports activities coaches and physiotherapists an unobtrusive method of analyzing physique actions from video footage that’s akin to utilizing markers.

Movement evaluation historically depends on attaching light-reflective markers onto particular factors on the physique; the motion of those markers in 3D area is then calculated utilizing knowledge from an array of cameras that movie the particular person’s actions from completely different angles.

Inserting markers precisely on the physique might be time-consuming to arrange and might generally intervene with the particular person’s pure actions.

To beat this, the staff at CAMERA led by Dr. Steffi Colyer, has developed a non-invasive markerless system utilizing laptop imaginative and prescient and deep studying strategies to measure movement by figuring out physique landmarks from common 2D picture knowledge.

Utilizing the identical photographs to judge the efficiency of their absolutely automated system, they discovered the outcomes have been akin to that of a standard marker-based movement seize system. The system works on related know-how to that utilized by business methods, however is accessible as an open-source workflow and might be tailored to person’s wants extra simply.

The staff has launched a novel dataset to permit different researchers to judge new markerless algorithms and additional progress the fields of laptop imaginative and prescient and biomechanics.

The staff used an open supply laptop imaginative and prescient system, OpenPose, to estimate the place of the joints on a 2D video picture of an individual operating, leaping and strolling. They then fuse the info in 3D and enter these knowledge into open-source modeling software program referred to as OpenSim, which inserts a skeleton to the joints and permits the entire physique movement to be obtained.

The absolutely synchronized video and marker-based knowledge used on this research, together with the code underpinning the markerless pipeline are actually accessible and are absolutely described in a paper lately revealed in Scientific Information.







Researchers from CAMERA, the College of Tub’s movement evaluation middle, have developed mo cap know-how that could possibly be utilized by clinicians, physios and sports activities coaches to investigate physique motion free of charge. Credit score: College of Tub

Dr. Colyer stated, “The difficulty with utilizing markers is that they are often difficult to put on a participant precisely and reliably and this course of can take a very long time, which is not very sensible for a lot of members and purposes (for instance elite athletes or scientific populations).

“Our markerless system estimates the joint positions from video alone with out the necessity for any gear to be positioned on the participant or any preparation time. This opens the door for us to seize movement knowledge extra readily in settings exterior of the laboratory and the outcomes for the actions we analyzed are akin to traditionally-used strategies with markers.

“Our pipeline is open supply, which implies that anybody with some experience within the space can use it free of charge to get motion knowledge from regular video footage.

“This could possibly be helpful for physiotherapists, clinicians and sports activities trainers in a variety of purposes together with sports activities efficiency and damage prevention or rehabilitation. Moreover, the accompanying knowledge set offers the primary high-quality benchmark to judge rising algorithms on this quickly evolving subject.

“We’ve used the system to measure the biomechanics of skeleton athletes throughout their push-starts and we’ve got lately taken it out on to the tennis and badminton courts to unobtrusively monitor how a lot work the gamers are performing throughout coaching and match play.”

Extra info:
Murray Evans et al, Synchronised Video, Movement Seize and Power Plate Dataset for Validating Markerless Human Motion Evaluation, Scientific Information (2024). DOI: 10.1038/s41597-024-04077-3

Supplied by
College of Tub

Quotation:
Markerless movement seize system opens up biomechanics for a variety of fields (2024, December 4)
retrieved 10 December 2024
from https://techxplore.com/information/2024-12-markerless-motion-capture-biomechanics-wide.html

This doc is topic to copyright. Other than any truthful dealing for the aim of personal research or analysis, no
half could also be reproduced with out the written permission. The content material is offered for info functions solely.





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