Vicon IX 2000 L Información técnica descargar pdf (Pagina 231)

Marker

Vicon MX Hardware System Reference Glossary-15

on video tape. Also see EBU timecode,

SMPTE timecode, Timecode, and VITC.

M

Marker 1) A sphere, hemisphere, or

disk coated with a highly retroreflective

material which is attached to a subject or

object whose motion is being captured or

analyzed in a Vicon system. The Vicon

cameras are designed to capture the

pattern of light reflected from such a

marker and convert it into an image that

represents the position and radius of the

marker. Also see Subject and Object.

2) The 3D representation of a

retroreflective marker generated by Vicon

application software (also referred to as a

model marker). The expected location of

all markers attached to a subject whose

motion is being captured or analyzed in a

Vicon system is defined in the kinematic

model (.vst or .vsk file) for the subject or

in the associated marker (.mkr) file.

These can be visualized as elements of

the 3D representation of the subject. Also

see Kinematic model, .mkr file, Subject,

.vsk file, and .vst file.

Marker covariance A 3D representa-

tion in Vicon application software of how

much a marker is allowed to move in

relation to its associated segment or

joint, based on the subject’s RoM trial.

Also see Marker, Range of Motion (RoM)

trial, and Segment.

Mask See Camera mask.

MCam A high-resolution, high-speed

digital CMOS sensor camera used in a

Vicon V-series system. There are Mcam

cameras that lock to PAL or NTSC video

systems and run in synchronous

multiples of their base frame rate. MCam

cameras can be integrated into a

Vicon MX system using the MX Bridge

unit. Also see CMOS, MX Bridge, NTSC,

PAL, Vicon MX, and Vicon V-series

system.

MCam2 A high-resolution, high-speed

digital CMOS sensor camera used in a

Vicon V-series system. MCam2 cameras

can be integrated into a Vicon MX system

using the MX Bridge unit. Also see CMOS,

MX Bridge, and Vicon V-series system.

.mkr file Marker file. A text file with

extension .mkr, which specifies the labels

to be used on the markers displayed in

the 3D Workspace in Vicon application

software and indicates the placement of

the physical markers on the subject or

object whose motion is being captured or

analyzed in a Vicon system. The file also

can include information about body

segments, modeled data, and how the

subject will be displayed in the

3D Workspace. You can use any of the

default .mkr files supplied with your Vicon

application software or create your own

to suit your particular needs. Vicon-

supplied .mkr files are installed under the

Vicon Models directory (by default,

C:\Program Files\Vicon\Models). Also see

Kinematic model, Label, Marker, Object,

Segment, and Subject.

Model marker See Marker definition 2.

Moment A vector quantity representing

the turning effect produced by a force.

This is calculated as the product of the

force and the perpendicular distance

between the point of application of the

force and the axis of rotation. Also see

Force and Vector.

.monitors file An XML file with

extension .monitors, which contains

configuration settings for event monitors

and alarms created in the Monitors status

pane in Vicon Nexus. Also see Nexus.

Motion capture The recording of

motion data with a Vicon system from

retroreflective markers attached to a

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