Whole-Body Magnetic Resonance Imaging Enables Assessing Spatial Accuracy and Precision of Skeletal Joint Locations Inferred from Motion Capture Systems
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Giblin S.,Smith M., Smith S., O'Brien S., McMorrow J. P., Meaney J., Wetterling F., Whole-Body Magnetic Resonance Imaging Enables Assessing Spatial Accuracy and Precision of Skeletal Joint Locations Inferred from Motion Capture Systems, 6th International Conference on 3D Body Scanning Technologies, Lugano, Switzerland, 27-28 October 2015, 2015, 98 - 105Download Item:
Abstract:
Motion capture systems can be used to infer skeletal joints from three-dimensional surface
information for various human poses. However, to-date it remains unclear how well the estimated joint
coordinates coincide with the anatomically-correct joint positions. The aim of this study was to
determine the localization accuracy and localization precision of inferred joint positions using
Magnetic Resonance Imaging (MRI). Color and depth information (RGB-D), and skeletal information
of an athlete in static pose standing upright were acquired. A whole-body 3D tomographic scan was
also recorded using a 3T MRI scanner.
The deviation of the joint location was the largest for the left upper leg (4.1cm±0.2cm) and the
smallest for the lower arms (0.2cm±0.01cm). The mean surface point distance averaged
2.2cm±1.3cm (left upper leg), 1.8cm±1.3cm (left lower arm), and 1.5cm±1.0cm (right lower arm).
To our knowledge, this is the first attempt to use MRI as a gold standard to validate skeletal joint
locations of a motion capture system. MRI provides a suitable means to validate skeletal joint
localization for any motion capture system (markerless and marker based). However, advanced
software solutions are required to validate and correct Kinect™ skeletal joint localization in the future.
Author's Homepage:
http://people.tcd.ie/wetterf
Author: Wetterling, Friedrich
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6th International Conference on 3D Body Scanning TechnologiesType of material:
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Magnetic Resonance Imaging, Kinect version 2, RGB-Depth, skeletal joint localization, CAPTUREDOI:
http://dx.doi.org/10.15221/15.098Metadata
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