System information

Vicon MX Hardware System Reference Glossary-21
RealTime subject A subject or object
whose motion is to be acquired and
streamed into visualization software in
which the data can be visualized and
manipulated in real time. Also see
RealTime Engine (RTE), Subject, and
Object.
Reconstruction The process by which
Vicon application software calculates the
position of markers in three-dimensional
space and links these points frame-by-
frame into a trajectory. Also see Frame,
Marker, and Trajectory.
Reconstruction entity A 3D represen-
tation generated by Vicon application
software showing the reconstructed
markers. Also see Marker and Recon-
struction.
Reconstruction volume The 3D repre-
sentation of the capture volume displayed
in some Vicon application software. This
enables the user to visualize the space
within which the Vicon system attempts
to reconstruct marker data. The dimen-
sions of this volume are user config-
urable. Also see Calibration volume,
Capture volume, Marker, and Trajectory.
Reference video A Vicon system
option for Vicon motion capture software
applications that enables digital video
data from multiple DCAM or DV format
video cameras to be captured
simultaneously with optical motion data
from Vicon MX systems (similar
functionality is provided by the Movie
Capture option in Vicon V-series
systems).
An IEEE 1394 option card must be
installed in the same computer as the
Reference Video option. The captured
data is stored in .avi files. Also see .avi
file, DCAM, DV, IEEE 1394, Movie
capture, Polygon, Vicon iQ, Vicon MX,
and Workstation.
Remote triggering A feature in Vicon
application software that enables a third-
party device integrated into a Vicon
system to start or stop data capture. Also
see Datastation, MX Control, and Trigger.
Resolution A measure of the fineness
of detail with which a camera or monitor
can produce an image with good
definition. This measurement is based on
the total number of pixels displayed
horizontally and vertically on the camera
video sensor or the video monitor. Also
see Camera video sensor and Pixel.
Retroreflective marker See Marker
definition 1.
Rigid body A virtual object formed
from a specified group of markers with a
relatively fixed proximity to one another.
Some Vicon application software can use
rigid bodies to fill gaps in other marker
trajectories. Also see Marker and
Trajectory.
RoM trial See Range of Motion (RoM)
trial.
Root The segment of a subject that the
autolabeling process is to identify first.
This segment is designated in the file
identifying the marker labels to be used.
For human subjects, this is typically a
6 DOF joint represented by the pelvis.
Also see DOF, .mkr file, .vsk file, and .vst
file.
Rotation A movement about a specified
axis. In Vicon application software, the
rotation of a kinematic model element
can be manipulated to change its
displayed orientation in a 3D Workspace.
Also see 3D Workspace, Scale, and
Translation.
.rtp file RealTime Parameters file. A
text file with extension .rtp, which
contains a set of parameters that specify
the way the RealTime Engine is to stream
data through some Vicon application
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