Journal
MEASUREMENT
Volume 173, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2020.108638
Keywords
Stereophotogrammetry; Videography; Image Processing; Bioinformatics; Anthropometry
Funding
- Spanish Ministry of Education [FPU15/02949]
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The study evaluated a 3D postural analysis methodology based on commercial cameras, a portable calibration device, and Excel software, showing that it is accurate and reliable compared to a 3D optical motion capture system. This low-cost approach could be beneficial for medical centers with limited budgets for analyzing asymmetries, postural alterations, and population-based anthropometric parameters.
Analysing posture in 3D generally requires expensive equipment and complex software, not accessible to most healthcare centres. The aim was to evaluate a 3D postural analysis methodology based on commercial cameras, a portable calibration device and Excel, a popular spreadsheet software. The accuracy and reliability of the methodology were studied using a 3D optical motion capture system with submillimetre accuracy as reference. 99 length and 99 angular anthropometrics parameters of 9 subjects were measured and Lin's concordance correlation coefficient (Lin's CCC), magnitudes of errors and Bland Altman graphs were computed. The measurement errors were of approximately 2 mm and of 1-2 deg, and the methodology was reliable (Lin's CCCs above 0.99). The suggested low-cost methodology could be used for applied 3D postural studies, analysing asymmetries, postural alterations or population-based anthropometric parameters, where usually submillimetre accuracy is not required and therefore can be useful for medical centres with a limited budget.
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