A low cost stereophotogrammetric system for the evaluation of tridimensional head translations during visual tasks

Autor:	Bruno Philip Alves da Silva, Marcus Vinícius Faleiro de Andrade, Lázaro Valentin Donadon, Ricardo Queiroz Guimarães, Maria Lúcia Machado Duarte, Cláudia de Almeida Ferreira Diniz, Márcia Reis Guimarães
Rok vydání:	2018
Předmět:	Adult Male Adolescent Computer science Head (linguistics) Biomedical Engineering Kinematics Midpoint 050105 experimental psychology Standard deviation Young Adult 03 medical and health sciences 0302 clinical medicine Software Position (vector) Humans 0501 psychology and cognitive sciences Point (geometry) Computer vision Vision Ocular business.industry 05 social sciences General Medicine Gaze Kinetics Head Movements Photogrammetry Female Artificial intelligence business Head Psychomotor Performance 030217 neurology & neurosurgery
Zdroj:	Journal of Medical Engineering & Technology. 42:411-419
ISSN:	1464-522X 0309-1902
DOI:	10.1080/03091902.2018.1529203
Popis:	A simple, low cost and easy-to-operate 3D stereophotogrammetry system was developed to measure the kinematic pattern of head stabilisation during visual tasks. The system differs from commercially available ones since it: (a) takes into account the gaze motor coordination characteristics and measures the head translations quantified at the point that best represents the translations caused by the eyes' movement during visual tasks, that is, the midpoint between the eyes; (b) offers minimum restriction to the head movement and minimum interference with it; (c) innovates when using the position coordinates produced by a free-online tracker software. The system was effective in recording the head movements and its RMS total error was 0.705 mm with ±0.808 mm standard deviation. This represents an RMS total error of 3.5%, considered satisfactory because it provided results with a confidence level higher than 95%. The system was effective to record differences in head movements of 11 individuals in open and closed eyes conditions and revealed the direction-specific feature of the head displacements size. The results showed that the system is a cost-effective and accurate alternative for studies needing to accurately measure head movements during visual tasks.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2978061af253bdcabfa9292ea0436e8 https://doi.org/10.1080/03091902.2018.1529203 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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