System information

Glossary-12 Vicon MX Hardware System Reference
Ground Also known as earth. A point
that is assumed to be at a zero voltage
potential.
H
Host PC The computer in a Vicon
system architecture that contains a
dedicated Ethernet port for Vicon system
communications and on which the core
Vicon application software is installed.
The host PC enables communications
between the Vicon application software
and other Vicon system components.
Additional network ports and Vicon
application or third-party software may
be installed on the host PC, depending
upon the computer specification. Also see
Vicon application software.
.hsf file Hardware Settings File. An XML
file with extension .hsf, which contains
hardware, system, and synchronization
settings that affect Vicon MX cameras.
You can specify settings that are added to
the default HardwareSettings.hsf file
supplied with Vicon iQ (by default, under
C:\Program Files\Vicon\ViconiQ 2.5
\Config) Alternatively, you can save
settings to your own .hsf files to suit your
particular needs; these are saved to the
active Session folder of the open
database. Also see MX Camera and
Vicon MX.
I
i.LINK A proprietary implementation of
the IEEE 1394 standard by Sony
Corporation. Also see IEEE 1394.
IEEE 1394 A standard for connecting
digital devices without requiring analog-
to-digital conversion. It is typically used
for transferring digital video to and from
video equipment and computers and for
connecting storage devices. Vicon MX
supports synchronous movie image
capture using an IEEE 1394 digital video
capture card installed on the host PC.
Also see FireWire, i.LINK, and Reference
video.
IIDC 1394 See DCAM.
Image circle The diameter of the
sharp, circular image that the camera
lens casts onto the sensor. This indicates
the maximum area of usable quality
image that the lens can produce.
Impedance The total opposition to the
flow of alternating or direct current
specified for signal input/output
connections.
Interpolation The process by which
Vicon application software fills a gap in a
trajectory by calculating a smooth curve
between the broken ends. Also see
Trajectory.
Inverse dynamics (kinetics) The
process of calculating the force and
moment (torque) acting on the elements
of an articulated structure, given the
mass, inertia, position, orientation,
velocity, acceleration, angular velocity,
and angular acceleration of those
elements. Inverse dynamics approaches
are used in Vicon application software for
biomechanical modeling applications.
Also see Forward dynamics (kinetics),
Forward kinematics, Inverse kinematics,
and Kinetics.
Inverse kinematics The process of
calculating the angles at all the joints
connecting the elements of an articulated
structure, given the position and
orientation of those elements. Inverse
kinematics approaches are used in Vicon
application software for biomechanical
modeling applications and skeleton
editing.
In animation applications, inverse
kinematics ’solvers’ attempt to deduce
the motion of segments based on a
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