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RealTime subject

Glossary-22 Vicon MX Hardware System Reference

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.

RoHS compliant Vicon hardware that

complies with Directive 2002/95/EC

concerning the Restriction of the Use of

certain Hazardous Substances in

Electrical and Electronic Equipment

(RoHS). This European Commission

Directive provides that new electrical and

electronic equipment put on the market

for the first time from 1 July 2006 should

not contain lead, cadmium, mercury,

hexavalent chromium, polybrominated

biphenyls (PBB) or polybrominated

diphenyl ethers (PBDE). Also see WEEE

compliant.

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.

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