Measuring trunk orientation with a CMOS camera: feasibility and accuracy

Autor: Anne-Sophie Gissot, Michel Paindavoine, G. Barbieri, Dominic Pérennou, M. Iacobelis
Přispěvatelé: Laboratoire d'Etude de l'Apprentissage et du Développement [Dijon] (LEAD), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), CHU Grenoble, Université Joseph Fourier - Grenoble 1 (UJF)-CHU Grenoble, Laboratoire d'Etude de l'Apprentissage et du Développement [Dijon] ( LEAD ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Université Joseph Fourier - Grenoble 1 ( UJF ) -CHU Grenoble
Rok vydání: 2006
Předmět:
030506 rehabilitation
MESH : Stroke
Computer science
MESH: Videotape Recording
MESH : Thorax
Signal
[ SDV.NEU.SC ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences
0302 clinical medicine
Image Processing
Computer-Assisted
Orthopedics and Sports Medicine
Computer vision
MESH : Algorithms
CMOS sensor
Orientation (computer vision)
Noise (signal processing)
Rehabilitation
[SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences
MESH: Posture
Thorax
MESH: Image Processing
Computer-Assisted
MESH: Reproducibility of Results
Stroke
MESH : Software
0305 other medical science
MESH : Image Processing
Computer-Assisted
Algorithms
MESH : Feasibility Studies
Posture
Biophysics
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Image processing
MESH: Algorithms
MESH: Stroke
MESH: Thorax
03 medical and health sciences
MESH: Software
Distortion
Humans
Simulation
MESH : Videotape Recording
MESH: Humans
business.industry
MESH : Reproducibility of Results
MESH : Humans
MESH : Posture
Reproducibility of Results
Videotape Recording
Trunk
Feasibility Studies
Artificial intelligence
business
Parallax
MESH: Feasibility Studies
030217 neurology & neurosurgery
Software
Zdroj: Gait and Posture
Gait and Posture, Elsevier, 2007, 26 (4), pp.603-6. ⟨10.1016/j.gaitpost.2006.12.004⟩
Gait and Posture, Elsevier, 2007, 26 (4), pp.603-6. 〈10.1016/j.gaitpost.2006.12.004〉
ISSN: 0966-6362
DOI: 10.1016/j.gaitpost.2006.12.004⟩
Popis: International audience; The purpose of this study was to develop and validate a new tool to objectively quantify trunk orientation at the bedside, especially dedicated to the measurement of the lateropulsion in acute and subacute stroke patients. We developed software to analyze 2D movement with a CMOS camera (Logitech Quickcam Pro 4000) and to calculate the orientation of a segment defined by two color markers. First, the accuracy, reproducibility and noise when measuring segment orientations were evaluated with the CMOS camera placed in different positions, and second trunk orientation was measured in static and in dynamic conditions both with a CMOS camera and with a gold standard 3D video system (BTS SMART-e). Results showed that the measurement was accurate (mean error=0.05+/-0.12 degrees), reproducible (S.D. over five measurements=0.005 degrees ) and steady (noise signal=0.02 degrees ). The data obtained with the CMOS camera were highly correlated with those obtained with the 3D video system both in static and in dynamic conditions. However, the CMOS camera must be relatively well centered on the measured segment to avoid error due to image distortion. The parallax error was negligible. In conclusion, this could be an important step in the postural assessment of acute and subacute stroke patients. The CMOS camera, a simple, portable, compact, low-cost, commercially available apparatus is the first tool to objectively quantify lateropulsion at the bedside. This method could also support the development of a rehabilitation program for trunk orientation based on biofeedback using the real-time signal provided by the device.
Databáze: OpenAIRE
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