System information

Vicon MX Hardware System Reference Glossary-3
simple scripting language, called
BodyLanguage. Also see BodyLanguage,
Pipeline, Plug-in Modeler, and
Workstation.
BodyLanguage A scripting language
used in BodyBuilder to create
biomechanical models. Also see
BodyBuilder.
Bones See Segment.
Bounding box A semitransparent 3D
box drawn around each segment defined
in the kinematic model for a subject (as
specified in the .vsk or .vst file). This
display is optional and is used for
visualization purposes only. Also see
Subject, .vsk file, and .vst file.
Burn-in window See Video Burn-in
window.
C
.c3d file A binary file with extension
.c3d, which contains among other details,
the 3D reconstructions of video data,
unlabeled trajectory data, analog data,
and parameters. Vicon application
software creates .c3d files when it
reconstructs and saves video data
captured by the Vicon system. By default,
.c3d files are saved to the active Session
folder of the open database. This is a
public domain file format that also can be
read and written by third-party
applications (for further details, visit
http://www.c3d.org/
). Also see Analog,
Eclipse database, Label, Reconstruction,
and Trajectory.
Cadence A temporal parameter used in
gait analysis for the number of strides the
subject takes per minute. Also see Gait
analysis.
Calibration See Autolabel calibration,
Camera calibration, Floor plane
calibration, and Subject calibration.
Calibration health check The process
by which some Vicon application software
determines the state of each camera,
provides information about possible
reflections in a camera’s view, and
identifies any cameras whose calibration
may need to be repaired. Also see
Camera calibration and Camera
calibration repair.
Calibration kit A collection of
specialized Vicon calibration objects for
use in the Dynamic Calibration (DynaCal)
process for calibrating Vicon systems and
cameras. Also see Calibration object and
Camera calibration.
Calibration object A specialized piece
of equipment used to calibrate the
capture volume and Vicon cameras.
There are two basic types of calibration
object: a frame and a wand. Both types
are typically made of metal and have
retroreflective markers attached.
The Vicon application software uses the
known physical dimensions and distance
between the markers on a calibration
object to calculate calibration
parameters. Also see Calibration kit,
Calibration wand, Camera calibration,
and Static calibration object.
Calibration reference object file See
.cro file.
Calibration volume The three-
dimensional area of the capture space
(length, width, and depth) calculated by
the camera calibration process. This
volume can be visualized in the
3D Workspace in Vicon application
software. Also see 3D Workspace,
Capture volume, and Reconstruction
volume.
Calibration wand A calibration object
used in the camera calibration process.
Pieces for constructing different types of
calibration wand are supplied in the Vicon
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