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Virtual point

Glossary-30 Vicon MX Hardware System Reference

extension .ViewType, which contains

configuration settings for view pane

layouts in the Nexus window. Also see

Nexus.

Virtual point A virtual marker that is

derived through calculations based on a

specified group of markers—or other

virtual points—whose proximity to one

another is relatively fixed. Some Vicon

application software can use virtual

points as though they were reconstructed

markers (e.g. to edit, filter, fill gaps in

other marker trajectories, and

visualization). Also see Marker, Point,

Reconstruction, and Trajectory.

Visualization software Vicon or third-

party application software in which

motion data can be visualized and

manipulated in real time. Also see

Polygon and Vicon iQ.

VITC Vertical Interval Timecode. A form

of timecode that is encoded directly into

the video tracks, picked up by the helical

scan heads on a Video Cassette Recorder

(VCR), and then output on the video

signal. This means that even if the VCR is

in a pause or slow mode, the VITC can

still be read. Also see EBU timecode, LTC,

SMPTE timecode, and Timecode.

Volume See Capture volume,

Calibration volume, Reconstruction

volume, and Tracking volume.

Volume origin The coordinates (0,0,0)

identifying the origin of the world in the

context of the capture volume or tracking

volume. The volume origin is specified

during the system calibration process.

Also see Capture volume, Tracking

volume, and System calibration.

.vpi file Vicon Plug-In file. A C++ DLL

file with extension .vpi, which is a user-

defined plug-in to Workstation application

software that has been written using the

Vicon Software Development Kit (SDK). A

.vpi file is included in Workstation as a

pipeline operation in the Vicon Plug-ins

directory (by default, C:\Program Files

\Vicon\Plugins). These .vpi files can be

run in Nexus through the Pipeline tool

pane and are stored in the Workstation

Plug-ins directory (by default,

C:\Program Files\Vicon\Nexus

\WorkstationPlugIns). Also see Nexus,

Pipeline, Plug-in, and Workstation.

.vsk file Vicon Skeleton file. An XML file

with extension .vsk, which contains a

kinematic model that describes the

relationships between the segments,

joints, and Vicon markers for a specific

subject or object of the type described in

the associated Vicon Skeleton Template

(.vst) file. For example, if the .vst file

represents a human being, the .vsk file

contains a kinematic model of an

individual person. The Vicon application

software uses the .vsk file to track and

label markers and segments for that

subject. By default, .vsk files are saved to

the active Session folder of the open

database. Also see Eclipse database,

Kinematic model, Marker, Object,

Segment, Subject, and .vst file.

.vst file Vicon Skeleton Template file.

An XML file with extension .vst, which

contains a kinematic model that describes

the generic relationships between

segments, joints, and Vicon markers for a

certain type of subject or object. For

example, a .vst file may be used to

represent a human being, a calibration

object, or a prop. You can use any of the

default .vst files supplied with your Vicon

application software or create your own

to suit your particular needs. Also see

Kinematic model, Marker, Object,

Segment, Subject, .vsk file.

.vtt file Vicon Threshold Table file. An

XML file with extension .vtt, which

contains the set of threshold grids

defined to discard (or in some Vicon

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